Signal processing method, optical line terminal and computer readable storage medium

Abstract

The invention provides a signal processing method, an optical line terminal (OLT) and a computer readable storage medium, and the method comprises the steps: carrying a bandwidth allocation indication of an uplink frame of a first PON mode through a first downlink frame, carrying a bandwidth allocation indication of an uplink frame of a second PON mode through a second downlink frame, and controlling the time alignment of the first downlink frame and the second downlink frame so as to send the first downlink frame and the second downlink frame at the same sending time on the OL T side, the first downlink frame being transmitted in a first specified wavelength band, and the second downlink frame being transmitted in a second specified wavelength band. Since the sending time of the first downlink frame and the sending time of the second downlink frame are aligned, the ONU of the first PON mode and the ONU of the second PON mode can be ensured to correctly send the uplink frame through the third specified wave band according to the bandwidth allocation indication in the downlink frames, uplink time slot conflicts of the uplink frames of different PON modes transmitted in the same wave band are avoided, and the uplink frame transmission efficiency is improved. And uplink time division coexistence of different PON mode systems is realized.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a signal processing method, an optical line terminal and a computer-readable storage medium. Background Art

[0002] Passive optical network (PON) technology is a point-to-multipoint fiber access technology. PON mainly includes the optical line terminal (OLT) at the central office, the optical distribution network (ODN) and at least one optical network unit (ONU) at the user end. ODN provides an optical transmission channel between OLT and ONU. ODN includes passive devices such as optical fiber and passive optical splitter (Splitter).

[0003] With the development of various services, users have an increasing demand for bandwidth, and PON systems are constantly upgrading from Gigabit-capable Passive Optical Network (GPON) to 10 Gigabit-capable Passive Optical Network (10G-PON, also known as XGPON), 10 Gigabit Symmetric Passive Optical Networks (10-Gigabit-capable Symmetric Passive Optical Networks, also known as XGS PON), and then to 50 Gigabit Passive Optical Networks (Higher speed passive optical networks, HSP PON, also known as 50G PON). In the future, it will be upgraded to 100 Gigabit or 200 Gigabit Passive Optical Networks (Very Higher Speed ​​Passive Optical Networks), etc. When two or more PON systems occupy the same wavelength band for upstream transmission, how to resolve the upstream time slot conflict is a technical problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a signal processing method, an optical line terminal, and a computer-readable storage medium, which are intended to enable uplink frame signals of different PON modes to use the same wavelength band for uplink transmission in a time-division coexistence manner.

[0005] In a first aspect, an embodiment of the present application provides a signal processing method, the method comprising:

[0006] Performing a time alignment operation on a first downstream frame and a second downstream frame, and sending the first downstream frame and the second downstream frame at the same sending time, wherein the first downstream frame includes a bandwidth allocation indication of an upstream frame of a first passive optical network PON mode, and the first downstream frame is transmitted in a first designated wavelength band, and the second downstream frame includes a bandwidth allocation indication of an upstream frame of a second PON mode, and the second downstream frame is transmitted in a second designated wavelength band;

[0007] A first uplink frame and a second uplink frame transmitted in a time division coexistence manner are received, wherein the first uplink frame is an uplink frame sent by an optical network unit ONU of the first PON mode according to the received first downlink frame, and the second uplink frame is an uplink frame sent by an ONU of the second PON mode according to the received second downlink frame, and the first uplink frame and the second uplink frame are transmitted in a third designated band.

[0008] In a second aspect, an embodiment of the present application provides an optical line terminal OLT, including:

[0009] A first transmitter, configured to transmit a first downstream frame in a first designated wavelength band, wherein the first downstream frame includes a bandwidth allocation indication of an upstream frame in a first passive optical network PON mode;

[0010] A second transmitter is used to send a second downstream frame in a second designated wavelength band, wherein the second downstream frame includes a bandwidth allocation indication of an upstream frame in a second passive optical network PON mode, and the first downstream frame and the second downstream frame are time-aligned and sent at the same sending time;

[0011] A first receiver is used to receive a first uplink frame and a second uplink frame transmitted in a time division coexistence manner, wherein the first uplink frame is an uplink frame sent by an optical network unit ONU in the first PON mode according to the received first downlink frame, and the second uplink frame is an uplink frame sent by an ONU in the second PON mode according to the received second downlink frame, and the first uplink frame and the second uplink frame are transmitted in a third designated band.

[0012] In a third aspect, an embodiment of the present application provides an optical line terminal OLT, including:

[0013] one or more processors;

[0014] A memory having one or more programs stored thereon, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the signal processing method as described in the first aspect above.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the signal processing method as described in the first aspect above is implemented.

[0016] In the embodiment of the present application, the bandwidth allocation indication of the upstream frame of the first PON mode is carried by the first downstream frame, the bandwidth allocation indication of the upstream frame of the second PON mode is carried by the second downstream frame, and the time alignment of the first downstream frame and the second downstream frame is controlled, and then the first downstream frame and the second downstream frame are sent at the same sending time on the OLT side, wherein the first downstream frame is transmitted in the first designated wavelength band, and the second downstream frame is transmitted in the second designated wavelength band. Since the sending time of the first downstream frame and the second downstream frame is aligned, it can be ensured that the ONU of the first PON mode and the ONU of the second PON mode can correctly send the upstream frame through the third designated wavelength band according to the bandwidth allocation indication in the downstream frame, avoid the upstream time slot conflict of the upstream frames of different PON modes transmitted in the same wavelength band, and realize the upstream time division coexistence of different PON mode systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the architecture of a PON system applicable to an embodiment of the present application;

[0018] Figure 2 is a flowchart of a signal processing method provided in an embodiment of the present application;

[0019] Figure 3 is a flowchart of a signal processing method provided by an embodiment of the present application;

[0020] Figure 4 This is a timing diagram related to SN request provided by an embodiment of the present application;

[0021] Figure 5 This is a timing diagram related to SN request provided by an embodiment of the present application;

[0022] Figure 6 is a flowchart of a signal processing method provided by an embodiment of the present application;

[0023] Figure 7 is a timing diagram related to ranging request provided by an embodiment of the present application;

[0024] Figure 8 is a timing diagram related to ranging request provided by an embodiment of the present application;

[0025] Fig. 9 is a flowchart of a signal processing method provided by an embodiment of the present application;

[0026] Fig.10a is a timing diagram of uplink burst transmission provided by an embodiment of the present application;

[0027] Fig.10b is a timing diagram of uplink burst transmission provided by an embodiment of the present application;

[0028] Fig.11 is an optional flow chart of uplink transmission provided by an embodiment of the present application;

[0029] Fig.12 is an optional flow chart of uplink transmission provided by an embodiment of the present application;

[0030] Fig.13 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application;

[0031] Fig.14 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application;

[0032] Fig.15 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application;

[0033] Fig.16 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application;

[0034] Fig.17 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application;

[0035] Fig.18 It is a structural diagram of an optical line terminal OLT provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present application, the signal processing method, electronic device and computer-readable storage medium provided by the present application are described in detail below in conjunction with the accompanying drawings.

[0037] Hereinafter, example embodiments will be described more fully in conjunction with the accompanying drawings, but the described example embodiments may be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make this application thorough and complete, and will enable those skilled in the art to fully understand the scope of this application.

[0038] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0039] The terms used herein are only used to describe specific embodiments and are not intended to limit the present application. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, the presence of features, wholes, steps, operations, elements and / or components is specified, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof is not excluded.

[0040] In the description of the embodiments of the present application, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0041] In the description of the embodiments of the present application, any embodiment or design scheme of "exemplary", "for example" or "for example" should not be understood as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprises", "has" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0043] In order to facilitate understanding of the solutions of the embodiments of the present application and to provide a clear and concise description of the following embodiments, a brief introduction to the related technologies is first given:

[0044] Passive Optical Network (PON): Passive optical network refers to an optical distribution network (ODN) between the optical line terminal (OLT) and the optical network unit (ONU), without any active electronic devices. One end of the OLT is connected to the upper network to complete the upstream access of the PON. The upper network can be an Internet protocol (IP) backbone network or a public switched telephone network (PSTN). The other end of the OLT is connected to the user-end device through the ODN to complete the downstream transmission of the PON and realize the control, management and ranging functions of the user-end device. The user-end device can be an ONU. One end of the user-end device is connected to the OLT through the ODN, and the other end of the user-end device is connected to other terminal devices, such as computers, landlines, etc. ONU works with OLT to realize Ethernet layer 2 and layer 3 functions and provide voice, data and multimedia services to users. For example, the ONU can select and receive data sent by the OLT; respond to management commands issued by the OLT and make corresponding adjustments; cache the user's Ethernet data and send it to the uplink in the sending window allocated by the OLT; and perform other user management functions.

[0045] The mode of PON can also be referred to as the working mode of PON. In practical applications, the mode control signal can be used to control the various devices included in PON to work in the corresponding mode. It can be understood that the mode includes an upstream rate, a downstream rate, an upstream wavelength, and a downstream wavelength. The so-called upstream refers to from ONU to OLT, and the upstream can also be referred to as an uplink or an upstream optical path. The so-called downstream refers to from OLT to ONU, and the downstream can also be referred to as a downlink or a downstream optical path. In the description of the embodiments of the present application, the upstream frame represents the signal sent by ONU to OLT, and can also be referred to as an upstream signal or an upstream frame signal; the downstream frame represents the signal sent by OLT to ONU, and can also be referred to as a downstream signal or a downstream frame signal.

[0046] The embodiments of the present application are applicable to compatibility between multiple PON working modes. Exemplarily, the PON working modes specifically include: next-generation PON (NG-PON), NG-PON1, NG-PON2, gigabit-capable PON (GPON), 10 gigabit per second PON (10 gigabit per second PON, XG PON), 10-gigabit-capable symmetric passive optical network (XGS PON), Ethernet PON (EPON), 10 gigabit per second EPON (10 gigabit per second EPON, 10G-EPON), next-generation EPON (NG-EPON), wavelength-division multiplexing (WDM) PON, time-and wavelength-division multiplexing (TWDM) PON, point-to-point (P2P) WDM PON (P2P-WDMPON), asynchronous transfer mode PON (asynchronous transfer mode PON, APON), broadband PON (Broadband PON, BPON), etc., as well as 25 gigabit per second PON (25G-PON), 50 gigabit per second PON (50GPON), 100 gigabit per second PON (100G-PON), 25 gigabit per second EPON (25G-EPON), 50 gigabit per second EPON (50G-EPON), 100 gigabit per second EPON (100G-EPON), and GPON, EPON of other rates.

[0047] In the passive optical network system, different modes of PON access technology occupy different wavelength bands in the upstream and downstream. Table 1 below gives the upstream and downstream wavelength ranges corresponding to the four PON systems.

[0048] Table 1

[0049]

[0050] As shown in Table 1, the upstream center wavelength of the GPON system is 1310nm, and the downstream center wavelength is 1490nm; the upstream center wavelength of the XGPON system is 1270nm, and the downstream center wavelength is 1577nm; the upstream center wavelength of the XGSPON system can be 1310nm or 1270nm, and the downstream center wavelength is 1577nm; the 50GPON system defines three different upstream wavelength options in order to coexist with the traditional PON system, among which the upstream center wavelength of option 1 is 1270nm, the upstream center wavelength of option 2 is 1300nm, and the upstream center wavelength of option 3 is 1286nm, and the downstream center wavelength of the 50GPON system is 1342nm. When the 50GPON system uses the option 3 wavelength option for upstream transmission, it can achieve wavelength division coexistence with the GPON system and the XGPON / XGSPON system; but when the 50GPON system uses the option 1 and option 2 wavelength options, when coexisting with other PON systems, it may cause upstream time slot conflicts with other PON systems.

[0051] In view of this, the embodiments of the present application provide a signal processing method, an optical line terminal and a computer-readable storage medium, which are used to solve the problem of upstream time slot conflicts in different PON systems, so that upstream frame signals of different PON modes can use the same wavelength band for upstream transmission in a time division coexistence manner.

[0052] It should be noted that the embodiments of the present application are not only applicable to the coexistence of different PON mode upstream time division between the central office OLT and ONU, but also applicable to the coexistence of different PON mode upstream time division between the MFU and SFU of the fiber to the room (FTTR) system.

[0053] See also Figure 1 , Figure 1 Schematic diagram of the architecture of a PON system applicable to the embodiment of the present application. Figure 1 As shown, the PON system 100 includes: an OLT 110 and a plurality of ONUs (ONU 120, ONU 130, ONU 140). Among them, the OLT 110 supports the transmission and reception of uplink and downlink signal frames of multiple PON modes. Exemplarily, the OLT 110 is provided with at least two PON MAC modules, each PON MAC module corresponds to a PON mode, and is used to process the transmission and reception signals of a specific PON mode, such as Figure 1In the example, OLT110 is provided with PON MAC 1, PON MAC 2 and PON MAC 3, wherein PON MAC 1 is used to process the transceiver signals of PON mode 1, PONMAC 2 is used to process the transceiver signals of PON mode 2, and PON MAC 3 is used to process the transceiver signals of PON mode 3. OLT110 is provided with at least two transmitters corresponding to the PON MAC modules one by one, each transmitter is used to send a downstream frame of a PON mode, and the downstream frame of each PON mode is sent through a specific wavelength band, and the wavelength bands used by the downstream frames of different PON modes are different. Figure 1 In the example, OLT110 is provided with downlink transmitter 1, downlink transmitter 2 and downlink transmitter 3. Downlink transmitter 1 is used to transmit downlink frames with wavelength λt1 under PON mode 1, downlink transmitter 2 is used to transmit downlink frames with wavelength λt2 under PON mode 2, and downlink transmitter 3 is used to transmit downlink frames with wavelength λt3 under PON mode 3. OLT110 is provided with one or more uplink receivers, and each uplink receiver receives uplink frames of a specific wavelength band. Uplink frames of different PON modes can share a wavelength band for transmission. Figure 1 In the example, OLT110 is provided with an uplink receiver 1 and an uplink receiver 2, the uplink receiver 1 is used to receive an uplink frame of a wavelength of λr1, the uplink receiver 2 is used to receive an uplink frame of a wavelength of λr2, the uplink frame signal of PON mode 1 is transmitted using the wavelength of λr1, and the uplink frame signals of PON mode 2 and PON mode 3 are transmitted using the wavelength of λr2. It should be understood that in the embodiment of the present application, when uplink frames of different PON modes share a wavelength band for transmission, the uplink frames of different PON modes are transmitted in a time division coexistence manner, that is, the uplink frames of different PON modes are transmitted in different time periods, and a receiver of OLT110 receives an uplink frame signal of a PON mode in a specific time period, for example, the receiver 2 receives the uplink frame signal of PON mode 2 in time period 1, and the receiver 2 receives the uplink frame signal of PON mode 3 in time period 2. Each uplink receiver sends the received uplink frame signal to the corresponding PON MAC module for deframing. Each ONU may be provided with at least one uplink transmitter and at least one downlink receiver, the uplink transmitter is used to send uplink frame signals to the OLT, and the downlink receiver is used to receive downlink frame signals from the OLT. Figure 1 The downstream receiver of ONU120 receives the downstream frame signal of the wavelength λt1, and the upstream transmitter transmits the upstream frame signal of the wavelength λr1; the downstream receiver of ONU130 receives the downstream frame signal of the wavelength λt2, and the upstream transmitter transmits the upstream frame signal of the wavelength λr2; the downstream receiver of ONU140 receives the downstream frame signal of the wavelength λt3, and the upstream transmitter transmits the upstream frame signal of the wavelength λr2.

[0054] See also Figure 2 , Figure 2 is a flow chart of a signal processing method provided in an embodiment of the present application. The method can be applied to an optical line terminal OLT, such as Figure 2 As shown, the method comprises the following steps:

[0055] Step S110: performing a time alignment operation on the first downlink frame and the second downlink frame, and sending the first downlink frame and the second downlink frame at the same sending time.

[0056] The first downstream frame includes a bandwidth allocation indication of an upstream frame of a first PON mode, and the first downstream frame is transmitted in a first designated wavelength band, and the second downstream frame includes a bandwidth allocation indication of an upstream frame of a second PON mode, and the second downstream frame is transmitted in a second designated wavelength band.

[0057] In an exemplary embodiment, the PON system includes a first downstream channel and a second downstream channel, the first downstream channel is used to transmit a downstream frame of a first PON mode (i.e., a first downstream frame), and the first downstream channel is fixedly transmitted via a λt1 wavelength (i.e., a first designated wavelength band) for downstream transmission; the second downstream channel is used to transmit a downstream frame of a second PON mode (i.e., a second downstream frame), and the second downstream channel is fixedly transmitted via a λt2 wavelength (i.e., a second designated wavelength band) for downstream transmission. In the embodiment of the present application, the first downstream frame includes a bandwidth allocation indication of an upstream frame of the first PON mode, and the second downstream frame includes a bandwidth allocation indication of an upstream frame of the second PON mode.

[0058] It can be understood that the bandwidth allocation indication includes information about the time interval for sending the upstream frame allocated to the corresponding ONU. Exemplarily, the bandwidth allocation indication includes at least one of the following: a bandwidth allocation indication identifier (Al loc-ID), a start time (Start Time) of the bandwidth allocation indication, and a grant size (Grant Size) of the bandwidth allocation indication. The ONU corresponding to the Al loc-ID determines the upstream time slot that its own upstream frame can occupy according to the start time and grant size of the bandwidth allocation indication. In this way, the ONU working in the first PON mode and the ONU working in the second PON mode perform upstream transmission within a specific time interval according to the corresponding bandwidth allocation indication, thereby avoiding upstream time slot conflicts between upstream frames of different PON modes transmitted in the same band, and realizing upstream time division coexistence of different PON mode systems.

[0059] It can be understood that in order to ensure that the ONU working in the first PON mode and the ONU working in the second PON mode can receive the downstream frame from the OLT within the preset time offset, and determine the start time of sending the upstream frame according to the downstream frame, and ensure that the upstream frames of the first PON mode and the second PON mode will not cause upstream time slot conflicts, it is necessary to ensure that the sending time of the first downstream frame sent to the ONU in the first PON mode and the second downstream frame sent to the ONU in the second PON mode must be consistent. Therefore, before sending the first downstream frame and the second downstream frame, the embodiment of the present application first performs a time alignment operation on the first downstream frame and the second downstream frame, so that the first downstream frame and the second downstream frame can be sent at the same time.

[0060] In an exemplary embodiment, the OLT is provided with a GPON MAC module and a 50GPON MAC module at the same time, the first PON mode represents the GPON mode, and the second PON mode represents the 50GPON mode. The GPON MAC module sends a GPON downstream frame (i.e., the first downstream frame) with a wavelength of 1480 to 1500 nm through a downstream transmitter 1, and the 50GPON MAC module sends a 50GPON downstream frame (i.e., the second downstream frame) with a wavelength of 1340 to 1344 nm through a downstream transmitter 2. The transmission time of the GPON downstream frame and the 50GPON downstream frame are aligned, and both start to be transmitted at time T1. Among them, the bandwidth allocation indication carried by the GPON downstream frame includes the following information: Alloc-ID is X, Start Time is t1', and Grant Size is Δt1, indicating that the GPON ONU with Alloc-ID X performs upstream transmission in the time interval of t1' to t1' + Δt1. 50The bandwidth allocation indication carried by the GPON downstream frame includes the following information: Alloc-ID is Y, Start Time is t2', and Grant Size is Δt2, indicating that the GPON ONU with Alloc-ID Y performs upstream transmission in the time interval t2'~t2'+Δt2. It should be noted that there is no overlap between the time interval t1'~t1'+Δt1 and the time interval t2'~t2'+Δt2. Optionally, there is a protection time interval between the time interval t1'~t1'+Δt1 and the time interval t2'~t2'+Δt2 to avoid upstream time slot conflicts when two PON modes generate upstream frames through the same band.

[0061] Step S120: receiving a first upstream frame and a second upstream frame transmitted in a time division coexistence manner, wherein the first upstream frame is an upstream frame sent by an ONU in a first PON mode according to a received first downstream frame, and the second upstream frame is an upstream frame sent by an ONU in a second PON mode according to a received second downstream frame, and the first upstream frame and the second upstream frame are transmitted in a third designated band.

[0062] In an exemplary embodiment, ONU1 is an ONU operating in a first PON mode, ONU2 is an ONU operating in a second PON mode, ONU1 is provided with a downstream receiver 1, and the downstream receiver 1 can receive a downstream frame transmitted in a first designated wavelength band; ONU2 is provided with a downstream receiver 2, and the downstream receiver 2 can receive a downstream frame transmitted in a second designated wavelength band. The OLT simultaneously sends a first downstream frame transmitted in the first designated wavelength band and a second downstream frame transmitted in the second designated wavelength band. ONU1 receives the first downstream frame, and determines that the time when it can perform upstream transmission is time period 1 according to the bandwidth allocation indication in the first downstream frame; ONU2 receives the second downstream frame, and determines that the time when it can perform upstream transmission is time period 2 according to the bandwidth allocation indication in the second downstream frame, wherein there is no overlap between time period 1 and time period 2. ONU1 sends a first upstream frame to the OLT in time period 1 according to the bandwidth allocation indication in the first downstream frame, and ONU2 sends a second upstream frame to the OLT in time period 2 according to the bandwidth allocation indication in the second downstream frame, and the above-mentioned first upstream frame and second upstream frame are both transmitted in a third designated wavelength band.

[0063] In an exemplary embodiment, ONU1 is an ONU working in GPON mode, and ONU2 is an ONU working in 50GPON mode. The OLT side simultaneously sends GPON downstream frames and 50GPON downstream frames at time T1; ONU1 receives GPON downstream frames from the OLT, and determines to perform upstream transmission in the time interval t1' to t1' + Δt1 according to the bandwidth allocation indication in the GPON downstream frames; ONU2 receives GPON downstream frames from the OLT, and determines to perform upstream transmission in the time interval t2' to t2' + Δt2 according to the bandwidth allocation indication in the GPON downstream frames. ONU1 sends GPON upstream frames to the OLT in the corresponding time interval t1' to t1' + Δt1 based on the received bandwidth allocation indication; ONU2 sends 50GPON upstream frames to the OLT in the corresponding time interval t2' to t2' + Δt2 based on the received bandwidth allocation indication, where the GPON upstream frames and 50GPON upstream frames are transmitted in the 1290 to 1330nm band.

[0064] In an exemplary embodiment, the first downlink frame includes a first SN request, and the second downlink frame includes a second SN request. The position of the first SN request in the first downlink frame is consistent with the position of the second SN request in the second downlink frame, the first SN request includes a bandwidth allocation indication of a registration frame of the first PON mode, and the second SN request includes a bandwidth allocation indication of a registration frame of the second PON mode.

[0065] See also Figure 3 , Figure 3FIG. 1 is a flow chart of a signal processing method provided by an embodiment of the present application. Figure 3 As shown, the method of the embodiment of the present application also includes the following steps:

[0066] Step S210: Synchronously opening the quiet window of the first PON mode and the quiet window of the second PON mode, wherein the quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time;

[0067] Step S220: In the quiet window of the first PON mode and the quiet window of the second PON mode, receiving the registration frame sent by the ONU selected to register in the first PON mode according to the first SN request, and / or receiving the registration frame sent by the ONU selected to register in the second PON mode according to the second SN request.

[0068] It can be understood that the SN request represents a serial number request, which is used for the registration authentication of the ONU. After receiving the SN request sent by the OLT, the ONU returns a registration frame carrying its own SN information to the OLT. In order to avoid the registration frame sent by the ONU that needs to be registered from conflicting with the upstream data frame sent by the registered ONU, the OLT opens a quiet window. During the quiet window, the OLT refuses to receive the upstream data frame sent by the registered ONU.

[0069] In the embodiment of the present application, the OLT synchronously opens the quiet window of the first PON mode and the quiet window of the second PON mode, that is, the quiet window of the first PON mode and the quiet window of the second PON mode are opened and ended at the same time. During the opening of the quiet windows of the first PON mode and the second PON mode, the OLT receives a registration frame sent by an ONU selected to register in the first PON mode according to a first SN request, and / or receives a registration frame sent by an ONU selected to register in the second PON mode according to a second SN request. In addition, during the opening of the quiet windows of the first PON mode and the second PON mode, the uplink data frame of any one of the first PON mode and the second PON mode is refused to be received.

[0070] It can be understood that the first SN request carries the bandwidth allocation indication of the registration frame of the first PON mode, and the second SN request carries the bandwidth allocation indication of the registration frame of the second PON mode, and in order to ensure that the registration frame of the first PON mode and the second PON mode do not cause an upstream time slot conflict in the upstream transmission, the sending time position of the first SN request and the second SN request should be consistent. Specifically, the OLT sends the first downstream frame and the second downstream frame at the same time, and the position of the first SN request in the first downstream frame and the position of the second SN request in the second downstream frame are consistent with each other. If the ONU of the first PON mode needs to register, it determines the sendable time interval of the registration frame to be sent according to the bandwidth allocation indication carried by the received first SN request, which is recorded as time period 1, and sends the registration frame in this time period 1; if the ONU of the second PON mode needs to register, it determines the sendable time interval of the registration frame to be sent according to the bandwidth allocation indication carried by the received second SN request, which is recorded as time period 2, and sends the registration frame in this time period 2. There is no overlap between the above time period 1 and time period 2, and both are located in the quiet window of the first PON mode and the second PON mode. Optionally, there is a protection time interval between time period 1 and time period 2. The OLT receives a registration frame sent by the ONU of the first PON mode in time period 1 in the quiet window, and receives a registration frame sent by the ONU of the second PON mode in time period 2 in the quiet window. It can be seen that the registration frame sent by the ONU of the first PON mode and the registration frame sent by the ONU of the second PON mode are also transmitted in a time division coexistence manner.

[0071] See also Figure 4 , Figure 4 FIG. 1 is a timing diagram related to SN request provided by an embodiment of the present application. Figure 4As shown, the GPON MAC module and the 50GPON MAC module on the OLT side respectively send downlink frames through corresponding transmitters, and the time of the GPON downlink frame and the 50GPON downlink frame are aligned. Among them, the GPON downstream frame includes a downstream physical control block (PhysicalControl Block downstream, PCBd) and a physical layer frame content (PHY frame content); the 50GPON downstream frame includes a downstream physical synchronization block (Physical Synchronization Block downstream, PSBd) and a PHYframe content. The ONU business under the GPON MAC is normal, and no new ONU needs to be registered and authenticated. The ONU business under the 50GPON MAC is normal, but a new ONU needs to be registered and authenticated. The 50GPON ONU obtains an SN request from the downstream frame sent by the 50GPON MAC module, and the SN request includes the following bandwidth allocation indication information: Alloc-ID is 1020-1023, StartTime is S, and Grant Size is 0. The 50GPON ONU sends a registration frame for registration authentication according to the above bandwidth allocation indication, and the registration frame includes the upstream physical layer operation, maintenance and management (Physical Layer Operations, Administration and The OLT synchronously opens the quiet windows of GPON and 50GPON, and receives the registration frame of 50GPON ONU in the quiet window, and registers the 50GPON ONU according to the registration frame.

[0072] See also Figure 5 , Figure 5 FIG. 1 is a timing diagram related to SN request provided by an embodiment of the present application. Figure 5As shown, the XG PON MAC module and the 50GPON MAC module on the OLT side send downlink frames through the corresponding transmitters respectively, and the time of the XG PON downlink frame and the 50GPON downlink frame is aligned. The ONU business under the XG PON MAC is normal, and no new ONU needs to be registered and authenticated. The ONU business under the 50GPON MAC is normal, but there is a new ONU that needs to be registered and authenticated. The 50GPON ONU obtains the SN request from the downlink frame sent by the 50GPON MAC module. The SN request includes the following bandwidth allocation indication information: Alloc-ID is 1020-1023, Start Time is S, and Grant Size is 0. The 50GPON ONU sends a registration frame for registration authentication according to the above bandwidth allocation indication. The registration frame contains an uplink PLOAM message, and the registration authentication information of the ONU is contained in the PLOAM message. The OLT synchronously opens the quiet windows of the XG PON and the 50GPON. The OLT receives the registration frame of the 50GPON ONU within the quiet window and registers the 50GPON ONU according to the registration frame.

[0073] In an exemplary embodiment, the first downlink frame includes a first ranging request, the second downlink frame includes a second ranging request, the position of the first ranging request in the first downlink frame is consistent with the position of the second ranging request in the second downlink frame, the first ranging request includes a bandwidth allocation indication of a ranging response frame of a first PON mode, and the second ranging request includes a bandwidth allocation indication of a ranging response frame of a second PON mode.

[0074] See also Figure 6 , Figure 6 FIG. 1 is a flow chart of a signal processing method provided by an embodiment of the present application. Figure 6 As shown, the method of the embodiment of the present application also includes the following steps:

[0075] Step S310: Synchronously opening the quiet window of the first PON mode and the quiet window of the second PON mode, wherein the quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time.

[0076] Step S320: receiving a ranging response frame sent by an ONU in the first PON mode according to a first ranging request in a quiet window of the first PON mode and a quiet window of the second PON mode, and / or receiving a ranging response frame sent by an ONU in the second PON mode according to a second ranging request.

[0077] It is understandable that during the registration phase of the ONU, the OLT needs to perform ranging on the registered ONU. The OLT sends a ranging request to the ONU, and after the registered ONU receives the ranging request from the OLT, it returns a ranging response frame carrying ranging information. In order to avoid conflicts between the ranging response frame sent by the ONU that needs to be registered and the uplink data frame sent by the registered ONU, the OLT opens a quiet window. During the quiet window, the OLT refuses to receive uplink data frames sent by the registered ONU.

[0078] In the embodiment of the present application, the OLT synchronously opens the quiet window of the first PON mode and the quiet window of the second PON mode, that is, the quiet window of the first PON mode and the quiet window of the second PON mode are opened and ended at the same time. During the opening of the quiet windows of the first PON mode and the second PON mode, the OLT receives the ranging response frame sent by the ONU selected to register in the first PON mode according to the first SN request, and / or receives the ranging response frame sent by the ONU selected to register in the second PON mode according to the second SN request. And, during the opening of the quiet windows of the first PON mode and the second PON mode, the uplink data frame of any one of the first PON mode and the second PON mode is refused to be received.

[0079] It can be understood that the first ranging request carries the bandwidth allocation indication of the ranging response frame of the first PON mode, and the second ranging request carries the bandwidth allocation indication of the ranging response frame of the second PON mode, and in order to ensure that the ranging response frame of the first PON mode and the second PON mode do not cause uplink time slot conflicts in uplink transmission, the sending time positions of the first ranging request and the second ranging request should be consistent. Specifically, the OLT sends the first downlink frame and the second downlink frame at the same time, and the position of the first ranging request in the first downlink frame and the position of the second ranging request in the second downlink frame are consistent with each other. If the ONU of the first PON mode needs to register, it determines the sendable time interval of the ranging response frame to be sent according to the bandwidth allocation indication carried by the received first ranging request, which is recorded as time period 1, and sends the ranging response frame in this time period 1; if the ONU of the second PON mode needs to register, it determines the sendable time interval of the ranging response frame to be sent according to the bandwidth allocation indication carried by the received second ranging request, which is recorded as time period 2, and sends the ranging response frame in this time period 2. There is no overlap between the above time period 1 and time period 2, and both are located in the quiet window of the first PON mode and the second PON mode. Optionally, there is a protection time interval between time period 1 and time period 2. The OLT receives the ranging response frame sent by the ONU of the first PON mode in time period 1 in the above quiet window, and receives the ranging response frame sent by the ONU of the second PON mode in time period 2 in the above quiet window. It can be seen that the ranging response frame sent by the ONU of the first PON mode and the ranging response frame sent by the ONU of the second PON mode are also transmitted in a time division coexistence manner.

[0080] See also Figure 7 , Figure 7 FIG. 1 is a timing diagram related to ranging request provided by an embodiment of the present application. Figure 7As shown, the GPON MAC module and the 50GPON MAC module on the OLT side send downlink frames through corresponding transmitters respectively, and the time of the GPON downlink frame and the 50GPON downlink frame is aligned. The ONU business under the GPON MAC is normal, and no new ONU needs to be measured. The ONU business under the 50GPON MAC is normal, but there is a new ONU that needs to be measured. The 50GPON ONU obtains a ranging request from the downlink frame sent by the 50GPON MAC module. The SN request includes the following bandwidth allocation indication information: Alloc-ID is 1020-1023, Start Time is S, and Grant Size is 0. The 50GPON ONU sends a ranging response frame according to the above bandwidth allocation indication. The ranging response frame includes an uplink PLOAM message, and the ranging information of the ONU is included in the PLOAM message. The OLT synchronously opens the quiet windows of GPON and 50GPON. The OLT receives the ranging response frame of the 50GPON ONU in the quiet window and determines the distance of the 50GPON ONU according to the ranging response.

[0081] See also Figure 8 , Figure 8 FIG. 1 is a timing diagram related to ranging request provided by an embodiment of the present application. Figure 8 As shown, the XG PON MAC module and the 50GPON MAC module on the OLT side send downlink frames through the corresponding transmitters respectively, and the time of the XG PON downlink frame and the 50GPON downlink frame are aligned. The ONU business under the XG PON MAC is normal, and there is no new ONU that needs to be ranging. The ONU business under the 50GPON MAC is normal, but there is a new ONU that needs to be ranging. The 50GPON ONU obtains a ranging request from the downlink frame sent by the 50GPONMAC module. The ranging request includes the following bandwidth allocation indication information: Alloc-ID is 1020-1023, Start Time is S, and Grant Size is 0. The 50GPON ONU sends a ranging response frame according to the above bandwidth allocation indication. The ranging response frame includes an uplink PLOAM message, and the ONU's ranging information is included in the PLOAM message. The OLT synchronously opens the quiet windows of the XG PON and the 50GPON. The OLT receives the ranging response frame of the 50GPON ONU within the quiet window and determines the distance of the 50GPON ONU according to the ranging response frame.

[0082] In an exemplary embodiment, the first downstream frame includes a first bandwidth map (Bandwidth Map, BWmap) field, the second downstream frame includes a second BWmap field, the position of the first BWmap field in the first downstream frame is consistent with the position of the second BWmap field in the second downstream frame, the first BWmap field is used to indicate the bandwidth allocation indication of the upstream burst data of the specific ONU of the first PON mode, and the second BWmap field is used to indicate the bandwidth allocation indication of the upstream burst data of the specific ONU of the second PON mode.

[0083] See also Fig. 9 , Fig. 9 FIG. 1 is a flow chart of a signal processing method provided by an embodiment of the present application. Fig. 9 As shown, the method of the embodiment of the present application may include the following steps:

[0084] Step S610: performing a time alignment operation on the first downstream frame and the second downstream frame, wherein the first downstream frame includes a first bandwidth mapping BWmap field, the second downstream frame includes a second BWmap field, the position of the first BWmap field in the first downstream frame is consistent with the position of the second BWmap field in the second downstream frame, the first BWmap field is used to indicate a bandwidth allocation indication of upstream burst data of a specific ONU in the first PON mode, and the second BWmap field is used to indicate a bandwidth allocation indication of upstream burst data of a specific ONU in the second PON mode;

[0085] Step S620: Sending a first downlink frame and a second downlink frame at the same sending time, wherein the first downlink frame is transmitted at a first designated wavelength band, and the second downlink frame is transmitted at a second designated wavelength band;

[0086] Step S630: receiving first uplink burst data of a specific ONU of a first PON mode in a first time period, and receiving second uplink burst data of a specific ONU of a second PON mode in a second time period, wherein the first time period and the second time period are non-overlapping time periods, and the first uplink burst data and the second uplink burst data are transmitted in a time division coexistence manner through a third designated band.

[0087] In an exemplary embodiment, the uplink direction from ONU to OLT adopts a time division coexistence mode to transmit data. The uplink transmission time is divided into a number of time slots, each time slot can be used for an ONU to send data, that is, the uplink data transmission belongs to the burst mode, and the OLT can receive uplink burst data from different ONUs in different time slots. In order to avoid uplink time slot conflicts of uplink burst data of ONUs with different PON modes, the OLT allocates bandwidth for sending uplink burst data to the ONU with the first PON mode through the first BWmap field of the first downlink frame, and allocates bandwidth for sending uplink burst data to the ONU with the second PON mode through the second BWmap field of the second downlink frame, and the uplink burst data bandwidth allocated to the ONU with the first PON mode and the ONU with the second PON mode do not overlap. It is worth noting that in order to ensure that the ONU of the first PON mode and the ONU of the second PON mode can receive the downstream frame of the OLT within the preset time offset, and determine the start time of sending the upstream frame according to the downstream frame, and ensure that the upstream frames of the first PON mode and the second PON mode will not cause upstream time slot conflicts, it is necessary to ensure that the sending time of the first BWmap domain sent to the ONU of the first PON mode and the second BWmap domain sent to the ONU of the second PON mode must be consistent. Specifically, before sending the first downstream frame and the second downstream frame, the first downstream frame and the second downstream frame need to be time-aligned so that the first downstream frame and the second downstream frame can be sent at the same time, and the position of the first BWmap domain in the first downstream frame and the position of the second BWmap domain in the second downstream frame need to be consistent.

[0088] See also Fig.10a , Fig.10a FIG. 1 is a timing diagram of uplink burst transmission provided by an embodiment of the present application. Fig.10aAs shown, the GPON MAC module and the 50GPON MAC module on the OLT side send downstream frames through corresponding transmitters respectively, and the time of the GPON downstream frame and the 50GPON downstream frame are aligned. The GPON downstream frame and the 50GPON downstream frame respectively carry a BWmap field, and the time position of the BWmap field in the GPON downstream frame and the BWmap field in the 50GPON downstream frame are consistent. Exemplarily, the BWmap field in the GPON downstream frame contains the following information: the All loc-ID of the GPON ONU is Y, and the GPON ONU with All loc-ID Y obtains the allocated bandwidth start time (Start Time) and bandwidth length (Grant Size); the BWmap field in the 50GPON downstream frame contains the following information: the All loc-ID of the 50GPON ONU is X, and the 50GPON ONU with All loc-ID X obtains the allocated bandwidth start time (Start Time) and bandwidth length (Grant Size).

[0089] The 50GPON ONU with All loc-ID X sends upstream burst data in time period 1 according to the received BWmap domain bandwidth allocation indication; the GPON ONU with All loc-ID Y sends upstream burst data in time period 2 according to the received BWmap domain bandwidth allocation indication. The above time period 1 and time period 2 are complementary and overlapped. Optionally, a protection time interval is reserved between time period 1 and time period 2 to ensure that the upstream burst data of the 50GPON ONU and the GPON ONU will not conflict with the upstream time slot.

[0090] See also Fig.10b , Fig.10b FIG. 1 is a timing diagram of uplink burst transmission provided by an embodiment of the present application. Fig.10bAs shown, the XG PON MAC module and the 50GPON MAC module on the OLT side send downstream frames through corresponding transmitters respectively, and the time of the XG PON downstream frame and the 50GPON downstream frame are aligned. The XG PON downstream frame and the 50GPON downstream frame respectively carry a BWmap field, and the time position of the BWmap field in the XG PON downstream frame is consistent with the time position of the BWmap field in the 50GPON downstream frame. Exemplarily, the BWmap field in the XG PON downstream frame contains the following information: the All loc-ID of the XG PON ONU is Y, and the XG PON ONU with All loc-ID Y obtains the allocated bandwidth start time (Start Time) and bandwidth length (Grant Size); the BWmap field in the 50GPON downstream frame contains the following information: the All loc-ID of the 50GPON ONU is X, and the 50GPON ONU with All loc-ID X obtains the allocated bandwidth start time (Start Time) and bandwidth length (Grant Size). The 50GPON ONU with All loc-ID X sends upstream burst data in time period 1 according to the received BWmap domain bandwidth allocation indication; the XG PON ONU with All loc-ID Y sends upstream burst data in time period 2 according to the received BWmap domain bandwidth allocation indication. The above time period 1 and time period 2 are complementary and overlapped. Optionally, a protection time interval is reserved between time period 1 and time period 2 to ensure that the upstream burst data of the 50GPON ONU and the XG PON ONU will not conflict in upstream time slots.

[0091] Optionally, the bandwidth allocation indication described in the embodiment of the present application includes the following information:

[0092] Alloc-ID: indicates the bandwidth allocation indicator, that is, the ONU ID, which is generally allocated to the ONU by the OLT;

[0093] Start Time: indicates the start time of the bandwidth allocation indication, that is, the start time of the allocated bandwidth;

[0094] Grant Size: indicates the authorized amount indicated by the bandwidth allocation, that is, the length of the allocated bandwidth.

[0095] See also Fig.11 , Fig.11 is an optional flow chart of uplink transmission provided by an embodiment of the present application, such as Fig.11 As shown, the method of the embodiment of the present application also includes the following steps:

[0096] Step S410: when the first uplink frame and the second uplink frame are abnormally transmitted in the time division coexistence mode, the quiet window of the first PON mode and the quiet window of the second PON mode are synchronously opened;

[0097] Step S420: Collect abnormal ONU information and abnormal category information in the quiet window of the first PON mode and the quiet window of the second PON mode;

[0098] Step S430: Report abnormal alarm information to the network manager, and / or send coexistence mode switching notification information to the ONU, wherein the abnormal alarm information includes abnormal ONU information and abnormal category information, and the coexistence mode switching notification information is used to instruct the ONU to switch from the uplink time division coexistence mode to the wavelength division coexistence mode for uplink transmission.

[0099] It is understandable that when the ONUs of the first PON mode and the second PON mode transmit uplink data in a time-division coexistence manner, there are uplink transmission abnormalities such as the OLT side not supporting the uplink time-division coexistence of the first PON mode and the second PON mode, and the out-of-band (OOB) crosstalk abnormality occurs on the OLT side. The OLT synchronously opens the quiet windows of the first PON mode and the second PON mode. During the opening of the quiet windows of the first PON mode and the second PON mode, the OLT refuses to receive uplink data frames sent by the ONUs of any one of the first PON mode and the second PON mode. During the opening of the quiet windows of the first PON mode and the second PON mode, the OLT collects abnormal ONU information and abnormal category information, for example, collects the serial number SN or other identification information of the abnormal ONU, and collects the category of the current uplink transmission abnormality. The OLT reports the collected abnormal ONU information and abnormal category information to the network manager so that the network manager can take processing measures for the current transmission abnormality in time. In response to an abnormality in the upstream transmission of the first PON mode and the second PON mode in the time division coexistence mode, the OLT sends a coexistence mode switching notification message to the corresponding ONU in the quiet window of the first PON mode and the second PON mode, so that the corresponding ONU switches from the upstream time division coexistence mode to the wavelength division coexistence mode for upstream transmission.

[0100] See also Fig.12 , Fig.12 is an optional flow chart of uplink transmission provided by an embodiment of the present application, such as Fig.12 As shown, the method of the embodiment of the present application also includes the following steps:

[0101] Step S510: receiving a third upstream frame transmitted in a wavelength division coexistence manner with the first upstream frame, wherein the third upstream frame is an upstream frame sent by the ONU in the second PON mode through a fourth designated wavelength band;

[0102] Step S520: when the first upstream frame and the third upstream frame are transmitted abnormally in the wavelength division coexistence mode, abnormal ONU information and abnormal category information are collected on the third designated wavelength band and the fourth designated wavelength band;

[0103] Step S530: Report abnormal alarm information to the network manager, and / or send coexistence mode switching notification information to the ONU, wherein the abnormal alarm information includes abnormal ONU information and abnormal category information, and the coexistence mode switching notification information is used to instruct the ONU to switch from the upstream wavelength division coexistence mode to the time division coexistence mode for upstream transmission.

[0104] It is understandable that when the ONU of the first PON mode and the ONU of the second PON mode transmit upstream data in a wavelength division coexistence mode, the upstream frame of the first PON mode and the upstream frame of the second PON mode are transmitted in different wavelength bands. Specifically, the upstream frame of the first PON mode is transmitted in a third designated wavelength band, and the upstream frame of the second PON mode is transmitted in a fourth designated wavelength band. For example, in a wavelength division coexistence mode, the GPON ONU uses a 1290-1300nm band for upstream transmission, and the 50GPON ONU uses a 1284-1288nm band for upstream transmission. When the OLT finds that a transmission anomaly occurs when the first PON mode and the second PON mode transmit upstream data in a wavelength division coexistence mode, the OLT collects abnormal ONU information and abnormal category information on the third designated wavelength band and the fourth designated wavelength band, for example, collects the serial number SN or other identification information of the abnormal ONU, and collects the category of the current upstream transmission anomaly. The OLT reports the collected abnormal ONU information and abnormal category information to the network manager so that the network manager can take timely processing measures for the current transmission anomaly. The OLT also sends a coexistence mode switching notification information to the corresponding ONU, so that the corresponding ONU switches from the wavelength division coexistence mode to the time division coexistence mode for upstream transmission. For example, notify the 50GPON ONU to change the upstream transmission band from the original 1284-1288nm band to the 1290-1310nm band for upstream transmission.

[0105] Exemplarily, the transmission anomaly described in the embodiments of the present application includes at least one of the following: the OLT side does not support the upstream time division coexistence of the first PON mode and the second PON mode, the OOB crosstalk anomaly occurs on the OLT side, and the OLT side does not support the upstream wavelength division coexistence of the first PON mode and the second PON mode.

[0106] See also Fig.13 , Fig.13 FIG. 1 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application. Fig.13 As shown, the OLT includes:

[0107] A first transmitter, configured to transmit a first downstream frame in a first designated wavelength band, wherein the first downstream frame includes a bandwidth allocation indication of an upstream frame in a first passive optical network PON mode;

[0108] A second transmitter is used to send a second downstream frame in a second designated wavelength band, wherein the second downstream frame includes a bandwidth allocation indication of an upstream frame in a second passive optical network PON mode, and the first downstream frame and the second downstream frame are time-aligned and sent at the same sending time;

[0109] The first receiver is used to receive a first upstream frame and a second upstream frame transmitted in a time-division coexistence manner, wherein the first upstream frame is an upstream frame sent by an optical network unit ONU in a first PON mode according to a received first downstream frame, and the second upstream frame is an upstream frame sent by an ONU in a second PON mode according to a received second downstream frame, and the first upstream frame and the second upstream frame are transmitted in a third designated band.

[0110] In an exemplary embodiment, the first downlink frame includes a first sequence number SN request, the second downlink frame includes a second SN request, a position of the first SN request in the first downlink frame is consistent with a position of the second SN request in the second downlink frame, the first SN request includes a bandwidth allocation indication of a registration frame of a first PON mode, and the second SN request includes a bandwidth allocation indication of a registration frame of a second PON mode;

[0111] The first receiver is further configured to:

[0112] In the quiet window of the first PON mode and the quiet window of the second PON mode, receiving a registration frame sent by an ONU selected to register in the first PON mode according to a first SN request, and / or receiving a registration frame sent by an ONU selected to register in the second PON mode according to a second SN request;

[0113] The quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time.

[0114] In an exemplary embodiment, the first downlink frame includes a first ranging request, the second downlink frame includes a second ranging request, a position of the first ranging request in the first downlink frame is consistent with a position of the second ranging request in the second downlink frame, the first ranging request includes a bandwidth allocation indication of a ranging response frame of a first PON mode, and the second ranging request includes a bandwidth allocation indication of a ranging response frame of a second PON mode;

[0115] The first receiver is further configured to:

[0116] In a quiet window of the first PON mode and a quiet window of the second PON mode, receiving a ranging response frame sent by an ONU in the first PON mode according to a first ranging request, and / or receiving a ranging response frame sent by an ONU in the second PON mode according to a second ranging request;

[0117] The quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time.

[0118] In an exemplary embodiment, the first downstream frame includes a first bandwidth mapping BWmap field, the second downstream frame includes a second BWmap field, the position of the first BWmap field in the first downstream frame is consistent with the position of the second BWmap field in the second downstream frame, the first BWmap field is used to indicate the bandwidth allocation indication of the upstream burst data of the specific ONU of the first PON mode, and the second BWmap field is used to indicate the bandwidth allocation indication of the upstream burst data of the specific ONU of the second PON mode.

[0119] In an exemplary embodiment, the bandwidth allocation indication includes: a bandwidth allocation indication identifier, a start time of the bandwidth allocation indication, and an authorized amount of the bandwidth allocation indication.

[0120] In an exemplary embodiment, an alarm module is further included, the alarm module being used to: when the first upstream frame and the second upstream frame are transmitted abnormally in the time division coexistence mode, in the quiet window of the first PON mode and the quiet window of the second PON mode, collect abnormal ONU information and abnormal category information, and report abnormal alarm information to the network manager, the abnormal alarm information including abnormal ONU information and abnormal category information;

[0121] The first transmitter and the second transmitter are also respectively used for: when the first uplink frame and the second uplink frame are transmitted abnormally in the time division coexistence mode, sending coexistence mode switching notification information to the ONU, and the coexistence mode switching notification information is used to instruct the ONU to switch from the uplink time division coexistence mode to the wavelength division coexistence mode for uplink transmission.

[0122] In an exemplary embodiment, it further includes a second receiver and an alarm module;

[0123] The second receiver is used to receive a third upstream frame transmitted in a wavelength division coexistence manner with the first upstream frame, wherein the third upstream frame is an upstream frame sent by the ONU in the second PON mode through a fourth designated wavelength band;

[0124] The alarm module is used for collecting abnormal ONU information and abnormal category information on the third designated wavelength band and the fourth designated wavelength band when the first upstream frame and the third upstream frame are abnormally transmitted in the wavelength division coexistence mode, and reporting abnormal alarm information to the network manager, wherein the abnormal alarm information includes abnormal ONU information and abnormal category information;

[0125] The first transmitter and the second transmitter are also respectively used for: when the first uplink frame and the third uplink frame are transmitted abnormally in the wavelength division coexistence mode, sending coexistence mode switching notification information to the ONU, wherein the coexistence mode switching notification information is used to instruct the ONU to switch from the uplink wavelength division coexistence mode to the time division coexistence mode for uplink transmission.

[0126] In an exemplary embodiment, the transmission anomaly includes at least one of the following: the OLT side does not support upstream time division coexistence of the first PON mode and the second PON mode, an out-of-band OOB crosstalk anomaly occurs on the OLT side, and the OLT side does not support upstream wavelength division coexistence of the first PON mode and the second PON mode.

[0127] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0128] The optical line terminal OLT to which the solution of the embodiment of the present application is applicable is described below by way of example.

[0129] See also Fig.14 , Fig.14 FIG. 1 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application. Fig.12 As shown in the figure, OLT supports GPON MAC and 50GPON MAC downstream framing and upstream deframing at the same time. In the downstream direction, the completed GPON physical frame PHY frame and 50G PHY frame are sent to GPON ONU and 50GPON ONU respectively through the two bands of 1480-1500nm and 1340-1344nm. In the upstream direction, the upstream physical burst data PHY burst of GPON and the upstream PHY burst of 50GPON are received through the 1290-1330nm band, and then sent to the corresponding MAC module for deframing. GPONMAC and 50GPON MAC transmit and receive upstream and downstream optical signals through a GPON transmitter, a 50GPON transmitter and a GPON / 50G PON multi-rate receiver.

[0130] See also Fig.15 , Fig.15 FIG. 1 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application. Fig.13As shown in the figure, OLT supports XG PON MAC and 50GPON MAC downstream framing and upstream deframing. In the downstream direction, the completed XG PHY frame and 50G PHY frame are sent to XG PON ONU and 50GPON ONU through the two bands of 1575-1580nm and 1340-1344nm respectively; in the upstream direction, XG PHY burst and 50G PHY burst are received through the 1260-1280nm band, and then sent to the corresponding MAC module for deframing. XG PON MAC and 50GPON MAC transmit and receive upstream and downstream optical signals through an XG(S)-PON transmitter, a 50G-PON transmitter and an XG(S)-PON / 50GPON multi-rate receiver.

[0131] See also Fig.16 , Fig.16 FIG. 1 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application. Fig.14 As shown in the figure, OLT supports downstream framing and upstream deframing of XG PON MAC, GPON MAC and 50GPON MAC at the same time. In the downstream direction, the completed XG PHY frame, GPON PHY frame and 50G PHY frame are sent to XG PON ONU, GPON ONU and 50GPON ONU through the three bands of 1575-1580nm, 1480-1500nm and 1340-1344nm respectively; in the upstream direction, XG PHY burst, GPON PHY burst and 50GPHY burst are received through the two bands of 1260-1280nm and 1290-1330nm, and then sent to the corresponding MAC module for deframing. XG PON MAC transmits and receives upstream and downstream optical signals through an XG(S)-PON transmitter and an XG(S)-PON receiver; GPON MAC and 50GPON MAC transmit and receive upstream and downstream optical signals through a GPON transmitter, a 50GPON transmitter and a GPON / 50GPON multi-rate receiver.

[0132] See also Fig.17 , Fig.17 FIG. 1 is a schematic diagram of the structure of an optical line terminal OLT provided by an embodiment of the present application. Fig.15As shown in the figure, OLT supports downstream framing and upstream deframing of XG PON MAC, GPON MAC and 50GPON MAC at the same time. In the downstream direction, the completed XG PHY frame, GPON PHY frame and 50G PHY frame are sent to XG PON ONU, GPON ONU and 50GPON ONU through the three bands of 1575-1580nm, 1480-1500nm and 1340-1344nm respectively; in the upstream direction, the upstream GPON PHY burst, XG PON PHY burst and 50GPON PHY burst are received through the two bands of 1290-1330nm and 1260-1280nm, and then sent to the corresponding MAC module for deframing. GPON MAC transmits and receives upstream and downstream optical signals through a GPON transmitter and a GPON receiver; XG PON MAC and 50GPON MAC transmit and receive upstream and downstream optical signals through an XG(S)-PON transmitter, a 50GPON transmitter and an XG(S)-PON / 50GPON multi-rate receiver.

[0133] See also Fig.18 , is an optical line terminal OLT provided in an embodiment of the present application, and the optical line terminal OLT 900 includes but is not limited to:

[0134] at least one processor 910;

[0135] At least one memory 920, used to store at least one program;

[0136] When at least one program is executed by at least one processor 910 , the signal processing method described in any of the above embodiments is performed.

[0137] It should be understood that the processor 910 and the memory 920 may be connected via a bus or other means.

[0138] It should be understood that the processor 910 may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. Alternatively, the processor 910 may be one or more integrated circuits for executing related programs to implement the technical solutions provided in the embodiments of the present application.

[0139] The memory 920 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs and non-transitory computer executable programs, such as the signal processing method described in any embodiment of the present application. The processor 910 implements the above-mentioned signal processing method by running the non-transitory software program and instructions stored in the memory 920.

[0140] The memory 920 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store and execute the above-mentioned signal processing method. In addition, the memory 920 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 embodiments, the memory 920 may optionally include a memory remotely arranged relative to the processor 910, and these remote memories may be connected to the processor 910 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0141] The non-transitory software programs and instructions required to implement the above-mentioned signal processing method are stored in the memory 920, and when executed by one or more processors 910, the signal processing method provided by any embodiment of the present application is executed.

[0142] An embodiment of the present application further provides a computer-readable storage medium, which stores a program executable by a processor. When the program executable by the processor is executed by the processor, it is used to implement the signal processing method described in any of the above embodiments.

[0143] The computer storage medium of the embodiment of the present application can adopt any combination of one or more computer-readable media. Computer-readable media can be computer-readable signal media or computer-readable storage media. Computer-readable storage media can be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above. More specific examples (non-exhaustive lists) of computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this document, computer-readable storage media can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0144] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0145] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0146] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0147] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the present application.

Claims

1. A signal processing method, the method comprising: Performing a time alignment operation on a first downstream frame and a second downstream frame, and sending the first downstream frame and the second downstream frame at the same sending time, wherein the first downstream frame includes a bandwidth allocation indication of an upstream frame of a first passive optical network PON mode, and the first downstream frame is transmitted in a first designated wavelength band, and the second downstream frame includes a bandwidth allocation indication of an upstream frame of a second PON mode, and the second downstream frame is transmitted in a second designated wavelength band; A first uplink frame and a second uplink frame transmitted in a time division coexistence manner are received, wherein the first uplink frame is an uplink frame sent by an optical network unit ONU of the first PON mode according to the received first downlink frame, and the second uplink frame is an uplink frame sent by an ONU of the second PON mode according to the received second downlink frame, and the first uplink frame and the second uplink frame are transmitted in a third designated band.

2. The method according to claim 1, characterized in that The first downlink frame includes a first sequence number SN request, the second downlink frame includes a second SN request, a position of the first SN request in the first downlink frame is consistent with a position of the second SN request in the second downlink frame, the first SN request includes a bandwidth allocation indication of a registration frame of the first PON mode, and the second SN request includes a bandwidth allocation indication of a registration frame of the second PON mode; The method further comprises: Synchronously opening a quiet window of the first PON mode and a quiet window of the second PON mode, wherein the quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time; In the quiet window of the first PON mode and the quiet window of the second PON mode, a registration frame is received and sent by the ONU selected to register in the first PON mode according to the first SN request, and / or a registration frame is received and sent by the ONU selected to register in the second PON mode according to the second SN request.

3. The method according to claim 1, characterized in that The first downlink frame includes a first ranging request, the second downlink frame includes a second ranging request, a position of the first ranging request in the first downlink frame is consistent with a position of the second ranging request in the second downlink frame, the first ranging request includes a bandwidth allocation indication of a ranging response frame of the first PON mode, and the second ranging request includes a bandwidth allocation indication of a ranging response frame of the second PON mode; The method further comprises: Synchronously opening a quiet window of the first PON mode and a quiet window of the second PON mode, wherein the quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time; In a quiet window of the first PON mode and a quiet window of the second PON mode, a ranging response frame sent by the ONU of the first PON mode according to the first ranging request is received, and / or a ranging response frame sent by the ONU of the second PON mode according to the second ranging request is received.

4. The method according to claim 1, characterized in that The first downlink frame includes a first bandwidth mapping BWmap field, and the second downlink frame includes a second BWmap field. The position of the first BWmap field in the first downlink frame is consistent with the position of the second BWmap field in the second downlink frame. The first BWmap field is used to indicate the bandwidth allocation indication of the uplink burst data of the specific ONU of the first PON mode, and the second BWmap field is used to indicate the bandwidth allocation indication of the uplink burst data of the specific ONU of the second PON mode.

5. The method according to any one of claims 2 to 4, characterized in that: The bandwidth allocation indication includes: a bandwidth allocation indication identifier, a start time of the bandwidth allocation indication, and an authorized amount of the bandwidth allocation indication.

6. The method according to claim 1, characterized in that The method further comprises: When the first uplink frame and the second uplink frame are abnormally transmitted in the time division coexistence mode, the quiet window of the first PON mode and the quiet window of the second PON mode are synchronously opened; Collecting abnormal ONU information and abnormal category information in a quiet window of the first PON mode and a quiet window of the second PON mode; Report abnormal alarm information to the network manager, and / or send coexistence mode switching notification information to the ONU, wherein the abnormal alarm information includes abnormal ONU information and abnormal category information, and the coexistence mode switching notification information is used to instruct the ONU to switch from the uplink time division coexistence mode to the wavelength division coexistence mode for uplink transmission.

7. The method according to claim 1, characterized in that The method further comprises: Receiving a third upstream frame transmitted in a wavelength division coexistence manner with the first upstream frame, wherein the third upstream frame is an upstream frame sent by the ONU of the second PON mode through a fourth designated wavelength band; When the first uplink frame and the third uplink frame are transmitted abnormally in the wavelength division coexistence mode, collecting abnormal ONU information and abnormal category information on the third designated wavelength band and the fourth designated wavelength band; Report abnormal alarm information to the network manager, and / or send coexistence mode switching notification information to the ONU, wherein the abnormal alarm information includes abnormal ONU information and abnormal category information, and the coexistence mode switching notification information is used to instruct the ONU to switch from the upstream wavelength division coexistence mode to the time division coexistence mode for upstream transmission.

8. The method according to claim 6 or 7, characterized in that: The transmission anomaly includes at least one of the following: the OLT side does not support the upstream time division coexistence of the first PON mode and the second PON mode, the OLT side has an out-of-band OOB crosstalk anomaly, and the OLT side does not support the upstream wavelength division coexistence of the first PON mode and the second PON mode.

9. An optical line terminal OLT, comprising: A first transmitter, configured to transmit a first downstream frame in a first designated wavelength band, wherein the first downstream frame includes a bandwidth allocation indication of an upstream frame in a first passive optical network PON mode; A second transmitter is used to send a second downstream frame in a second designated wavelength band, wherein the second downstream frame includes a bandwidth allocation indication of an upstream frame in a second passive optical network PON mode, and the first downstream frame and the second downstream frame are time-aligned and sent at the same sending time; A first receiver is used to receive a first uplink frame and a second uplink frame transmitted in a time division coexistence manner, wherein the first uplink frame is an uplink frame sent by an optical network unit ONU in the first PON mode according to the received first downlink frame, and the second uplink frame is an uplink frame sent by an ONU in the second PON mode according to the received second downlink frame, and the first uplink frame and the second uplink frame are transmitted in a third designated band.

10. The optical line terminal OLT according to claim 9, characterized in that: The first downlink frame includes a first sequence number SN request, the second downlink frame includes a second SN request, a position of the first SN request in the first downlink frame is consistent with a position of the second SN request in the second downlink frame, the first SN request includes a bandwidth allocation indication of a registration frame of the first PON mode, and the second SN request includes a bandwidth allocation indication of a registration frame of the second PON mode; The first receiver is further configured to: In the quiet window of the first PON mode and the quiet window of the second PON mode, receiving a registration frame sent by the ONU selected to register in the first PON mode according to the first SN request, and / or receiving a registration frame sent by the ONU selected to register in the second PON mode according to the second SN request; The quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time.

11. The optical line terminal OLT according to claim 9, characterized in that: The first downlink frame includes a first ranging request, the second downlink frame includes a second ranging request, a position of the first ranging request in the first downlink frame is consistent with a position of the second ranging request in the second downlink frame, the first ranging request includes a bandwidth allocation indication of a ranging response frame of the first PON mode, and the second ranging request includes a bandwidth allocation indication of a ranging response frame of the second PON mode; The first receiver is further configured to: In a quiet window of the first PON mode and a quiet window of the second PON mode, receiving a ranging response frame sent by the ONU in the first PON mode according to the first ranging request, and / or receiving a ranging response frame sent by the ONU in the second PON mode according to the second ranging request; The quiet window of the first PON mode and the quiet window of the second PON mode have the same start time and end time.

12. The optical line terminal OLT according to claim 9, characterized in that: The first downlink frame includes a first bandwidth mapping BWmap field, and the second downlink frame includes a second BWmap field. The position of the first BWmap field in the first downlink frame is consistent with the position of the second BWmap field in the second downlink frame. The first BWmap field is used to indicate the bandwidth allocation indication of the uplink burst data of the specific ONU of the first PON mode, and the second BWmap field is used to indicate the bandwidth allocation indication of the uplink burst data of the specific ONU of the second PON mode.

13. The optical line terminal OLT according to any one of claims 10 to 12, characterized in that: The bandwidth allocation indication includes: a bandwidth allocation indication identifier, a start time of the bandwidth allocation indication, and an authorized amount of the bandwidth allocation indication.

14. The optical line terminal OLT according to claim 9, characterized in that: It also includes an alarm module, which is used to: when the first upstream frame and the second upstream frame are transmitted abnormally in the time division coexistence mode, collect abnormal ONU information and abnormal category information in the quiet window of the first PON mode and the quiet window of the second PON mode, and report abnormal alarm information to the network manager, wherein the abnormal alarm information includes abnormal ONU information and abnormal category information; The first transmitter and the second transmitter are also respectively used for: when the first uplink frame and the second uplink frame are transmitted abnormally in the time division coexistence mode, sending coexistence mode switching notification information to the ONU, and the coexistence mode switching notification information is used to instruct the ONU to switch from the uplink time division coexistence mode to the wavelength division coexistence mode for uplink transmission.

15. The optical line terminal OLT according to claim 9, characterized in that: Also includes a second receiver and an alarm module; The second receiver is used to receive a third uplink frame transmitted in a wavelength division coexistence manner with the first uplink frame, wherein the third uplink frame is an uplink frame sent by the ONU in the second PON mode through a fourth designated wavelength band; The alarm module is used for collecting abnormal ONU information and abnormal category information on the third designated wavelength band and the fourth designated wavelength band when the first upstream frame and the third upstream frame are transmitted abnormally in the wavelength division coexistence mode, and reporting abnormal alarm information to the network manager, wherein the abnormal alarm information includes abnormal ONU information and abnormal category information; The first transmitter and the second transmitter are also respectively used for: when the first uplink frame and the third uplink frame are transmitted abnormally in the wavelength division coexistence mode, sending coexistence mode switching notification information to the ONU, wherein the coexistence mode switching notification information is used to instruct the ONU to switch from the uplink wavelength division coexistence mode to the time division coexistence mode for uplink transmission.

16. The optical line terminal OLT according to claim 14 or 15, characterized in that: The transmission anomaly includes at least one of the following: the OLT side does not support the upstream time division coexistence of the first PON mode and the second PON mode, the OLT side has an out-of-band OOB crosstalk anomaly, and the OLT side does not support the upstream wavelength division coexistence of the first PON mode and the second PON mode.

17. An optical line terminal OLT, comprising: one or more processors; A memory having one or more programs stored thereon, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the signal processing method as described in any one of claims 1-8.

18. A computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the signal processing method according to any one of claims 1 to 8.

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