Optical network conflict detection method, communication device, and storage medium

Abstract

Provided are an optical network conflict detection method, a communication device, and a storage medium. The optical network conflict detection method is applied to an optical line terminal, and the optical line terminal accesses a first passive optical network and a second passive optical network. The optical network conflict detection method comprises: in response to detecting the presence of a first coexistence conflict feature, stopping uplink transmission of an optical network unit in the second passive optical network; when the presence of a second coexistence conflict feature is detected, recovering the uplink transmission of the optical network unit in the second passive optical network according to a preset policy, and re-detecting whether the first coexistence conflict feature is present, wherein a coexistence conflict degree represented by the second coexistence conflict feature is smaller than a coexistence conflict degree represented by the first coexistence conflict feature; and when the presence of the first coexistence conflict feature is re-detected, determining the latest optical network unit of which the uplink transmission is recovered to be a target optical network unit causing a coexistence conflict.

Description

Optical network conflict detection method, communication device and storage medium

[0001] This application claims priority to Chinese patent application No. 202310959215.5, filed on July 31, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of communication technology, and in particular to an optical network conflict detection method, a communication device, and a storage medium. Background Art

[0003] Passive optical network (PON) technology is a flexible broadband access technology with numerous advantages, including high bandwidth, high efficiency, wide coverage, and a rich user interface. It is widely used in access networks for various technologies. PON technology is categorized by transmission rate into 1 gigabit passive optical network (1G PON) and 10 gigabit passive optical network (10G PON). 1G PON includes Ethernet passive optical network (EPON) and gigabit passive optical network (GPON).

[0004] Summary of the Invention

[0005] In a first aspect, an optical network conflict detection method is provided, which is applied to an optical line terminal (OLT), wherein the optical line terminal is connected to a first passive optical network and a second passive optical network, and the transmission protocols of the first passive optical network and the second passive optical network are different. The optical network conflict detection method includes: in response to detecting the presence of a first coexistence conflict feature, stopping the uplink transmission of an optical network unit in the second passive optical network; when the presence of the second coexistence conflict feature is detected, resuming the uplink transmission of the optical network unit in the second passive optical network according to a preset strategy, and re-detecting whether the first coexistence conflict feature exists, the coexistence conflict degree represented by the second coexistence conflict feature being less than the coexistence conflict degree represented by the first coexistence conflict feature; when the presence of the first coexistence conflict feature is detected again, determining that the optical network unit that most recently resumed uplink transmission is the target optical network unit that caused the coexistence conflict.

[0006] In a second aspect, a communication device is provided, which includes: a processing unit, which is used to: in response to detecting the presence of a first coexistence conflict feature, stop the uplink transmission of the optical network unit in the second passive optical network; in the case of detecting the presence of a second coexistence conflict feature, restore the uplink transmission of the optical network unit in the second passive optical network according to a preset strategy, and detect again whether there is the first coexistence conflict feature, the coexistence conflict degree represented by the second coexistence conflict feature is less than the coexistence conflict degree represented by the first coexistence conflict feature; in the case of detecting the presence of the first coexistence conflict feature again, determine that the optical network unit that most recently resumed uplink transmission is the target optical network unit that caused the coexistence conflict.

[0007] In a third aspect, a communication device is provided, comprising: a processor and a memory. The memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the communication device implements the method provided in the first aspect.

[0008] In a fourth aspect, a computer-readable storage medium is provided, which stores computer instructions. When the computer instructions are executed on a computer, the computer executes the method provided in the first aspect.

[0009] In a fifth aspect, a computer program product comprising computer instructions is provided. When the computer instructions are executed on a computer, the computer is caused to execute the method provided in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation to the technical solution of the present disclosure.

[0011] FIG1 is a schematic diagram of the structure of an optical network according to an embodiment of the present disclosure.

[0012] FIG2 is a flow chart of an optical network conflict detection method according to an embodiment of the present disclosure.

[0013] FIG3 is a flow chart of another optical network conflict detection method according to an embodiment of the present disclosure.

[0014] FIG4 is a schematic flow chart of another optical network conflict detection method according to an embodiment of the present disclosure.

[0015] FIG5 is a flow chart of another optical network conflict detection method according to an embodiment of the present disclosure.

[0016] FIG6 is a flow chart of another optical network conflict detection method according to an embodiment of the present disclosure.

[0017] FIG7 is a schematic diagram of the overall flow of an optical network conflict detection method according to an embodiment of the present disclosure.

[0018] FIG8 is a schematic diagram showing the composition of a communication device according to an embodiment of the present disclosure.

[0019] FIG9 is a schematic structural diagram of another communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0021] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0022] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. Throughout this disclosure, unless otherwise specified, "plurality" means two or more.

[0023] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present disclosure should not be interpreted as being more preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0024] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0025] EPON includes 1G EPON and 10G EPON, while GPON includes 50G PON. 1G EPON refers to 1G upstream and 1G downstream. 10G EPON includes 10G EPON symmetric mode and 10G EPON asymmetric mode. 10G EPON symmetric mode refers to 10G upstream and 10G downstream, while 10G EPON asymmetric mode refers to 1G upstream and 10G downstream.

[0026] Currently, coexistence conflicts may occur in optical networks where EPON and GPON coexist. The reasons include the following two aspects.

[0027] On the one hand, in current optical networks where EPON and GPON coexist, the 1G EPON and 10G EPON asymmetric mode standards define upstream wavelengths as 1260nm to 1360nm, the 10G EPON symmetric mode standard defines upstream wavelengths as 1260nm to 1280nm, and the 50G PON standard defines upstream wavelengths in various ranges, including 1270±10nm, 1286±2nm, 1300±10nm, and 1300±2nm. As can be seen from the above, the upstream wavelength ranges of EPON and GPON overlap, creating mutual interference and potentially leading to coexistence conflicts when EPON and GPON coexist.

[0028] On the other hand, to achieve low costs, EPON uses distributed Fabry-Perot (FP) lasers as its upstream lasers. The upstream signal has multiple longitudinal modes and a wide spectral width. Furthermore, the target optical network unit (ONU) optical transmitter is uncooled, resulting in a large wavelength drift range and a high probability of wavelength conflict with GPON. Furthermore, as GPON scales up and the cost of distributed feedback (DFB) lasers decreases, EPON's upstream optical transmitters may use the same DFB lasers as GPON. DFB lasers emit at a wavelength of 1310±20nm, further enabling EPON to avoid wavelength coexistence conflicts with GPON.

[0029] Therefore, in the current optical network where EPON and GPON coexist, there is a problem of mutual interference due to the overlap of the upstream wavelength ranges of EPON and GPON, which may cause coexistence conflicts between EPON and GPON, thereby affecting the reliability of the optical network.

[0030] In summary, reliable coexistence between EPON and GPON is currently unattainable. Therefore, it is necessary to identify the target optical network unit (ONU) causing the coexistence conflict to guide network operations and maintenance personnel in resolving the conflict. However, current technologies are unable to identify the target ONU causing the coexistence conflict, making it difficult to successfully resolve the conflict and impacting the reliability of the optical network.

[0031] Based on this, the embodiments of the present disclosure provide an optical network conflict detection method, a communication device, and a storage medium. When the presence of a first coexistence conflict characteristic is detected, it represents that a coexistence conflict may have occurred. After stopping the uplink transmission of the optical network unit in the second passive optical network, when the presence of a second coexistence conflict characteristic is detected, since the degree of coexistence conflict represented by the second coexistence conflict characteristic is less than the degree of coexistence conflict represented by the first coexistence conflict characteristic, it represents that after stopping the uplink transmission of the optical network unit in the second passive optical network, the degree of coexistence conflict is alleviated, and it is determined that there is a coexistence conflict. Then, the uplink transmission of the optical network unit in the second passive optical network is restored according to the preset strategy, and the presence of the first coexistence conflict characteristic is detected again. When the presence of the first coexistence conflict characteristic is detected again, it represents that the optical network unit that most recently resumed uplink transmission is the target optical network unit that caused the coexistence conflict. In this way, when it is determined that a coexistence conflict characteristic has occurred, the uplink transmission of the optical network unit in the second passive optical network is restored, and whether the first coexistence conflict characteristic exists is detected again, so as to identify the target optical network unit that caused the coexistence conflict, so as to provide guidance for the subsequent elimination of the coexistence conflict, which helps to improve the reliability of the optical network.

[0032] The following describes the solutions of the embodiments of the present disclosure in conjunction with the accompanying drawings.

[0033] FIG1 is a schematic diagram of the structure of an optical network according to an embodiment of the present disclosure. As shown in FIG1 , the optical network includes but is not limited to an OLT 10 , an optical distribution network (ODN) 20 , a first passive optical network 30 , and a second passive optical network 40 .

[0034] In some embodiments, OLT 10 is connected to ODN 20, and OLT 10 accesses first passive optical network 30 and second passive optical network 40 through ODN 20. OLT 10 is a terminal device used to connect to the optical fiber trunk line and is a central office device in the optical network. It has the following three functions.

[0035] 1. Send Ethernet data to the ONU in broadcast mode.

[0036] 2. Initiate and control the ranging process and record the ranging information.

[0037] 3. Allocate bandwidth to the ONU. That is, control the start time and send window size of the ONU data.

[0038] In some embodiments, OLT 10 is a multimode OLT device that supports multiple rate modes. For example, OLT 10 is a multimode OLT device that supports multiple modes, such as EPON mode and GPON mode. EPON modes include 1G EPON and 10G EPON, and GPON modes include 50G PON. In other words, OLT 10 can be a multimode OLT device that supports 1G EPON, 10G EPON, and 50G PON.

[0039] In some embodiments, ODN 20 connects the first passive optical network 30 and the second passive optical network 40. ODN 20 is used to provide an optical transmission channel between OLT 10 and the first passive optical network 30 and the second passive optical network 40. ODN 20 includes passive components such as optical fibers and passive optical splitters.

[0040] In some embodiments, the first passive optical network 30 and the second passive optical network 40 use different transmission protocols. For example, the first passive optical network 30 is one of an Ethernet passive optical network and a gigabit passive optical network, and the second passive optical network 40 is the other of the two. Ethernet passive optical networks include at least one of the following: a 1G Ethernet passive optical network and a 10G Ethernet passive optical network, and gigabit passive optical networks include 50G gigabit passive optical networks. 10G Ethernet passive optical networks include at least one of the following modes: a 10G Ethernet passive optical network asymmetric mode and a 10G Ethernet passive optical network symmetric mode. 50G gigabit passive optical networks include three uplink rates: 12.5G, 25G, and 50G. It should be understood that with the development of passive optical network technology, passive optical networks using other transmission protocols may appear in the future, and future passive optical networks may also adopt other names.

[0041] In some embodiments, for the first passive optical network 30 and the second passive optical network 40 with different transmission protocols, the first passive optical network 30 and the second passive optical network 40 can coexist in the optical network through a wavelength multiplexing / demultiplexing filter, or can coexist in the optical network through a combined optical module.

[0042] In some embodiments, the first passive optical network 30 and the second passive optical network 40 may each include a plurality of ONUs.

[0043] For example, taking the first passive optical network 30 as an Ethernet passive optical network and the second passive optical network 40 as a gigabit passive optical network, as shown in FIG1 , the first passive optical network 30 may include multiple ONUs (eg, ONU31 , ONU32 , and ONU33 ).

[0044] As an example, the multiple ONUs included in the first passive optical network 30 can be ONUs of the same rate mode passive optical network, for example, the multiple ONUs can all be ONUs of any one of 1G EPON, 10G EPON asymmetric mode, and 10G EPON symmetric mode passive optical network.

[0045] As another example, the multiple ONUs may be ONUs of a passive optical network with different rate modes. For example, ONU 31 may be an ONU of 1G EPON, ONU 32 may be an ONU of 10G EPON asymmetric mode, and ONU 33 may be an ONU of 10G EPON symmetric mode.

[0046] Continuing with FIG. 1 , the second passive optical network 40 may include a plurality of ONUs (eg, ONU 41 , ONU 42 , and ONU 43 ).

[0047] As an example, the multiple ONUs included in the second passive optical network 40 can be ONUs of a passive optical network with the same upstream rate. For example, when the second passive optical network 40 is a 50G PON, ONU41, ONU42 and ONU43 can all be ONUs of a 50G PON with an upstream rate of 12.5G.

[0048] As another example, the multiple ONUs included in the second passive optical network 40 can be ONUs of passive optical networks with different upstream rates. For example, when the second passive optical network 40 is 50G PON, ONU41 can be an ONU of 50G PON with an upstream rate of 12.5G, ONU42 can be an ONU of 50G PON with an upstream rate of 25G, and OUN43 can be an ONU of 50G PON with an upstream rate of 50G.

[0049] In some embodiments, for each ONU in the optical network, the ONU is used to receive broadcast data sent by OLT10; the ONU is also used to respond to ranging and power control commands issued by OLT10 and make corresponding adjustments; the ONU is also used to cache the user's Ethernet data and send Ethernet data in the upstream direction within the sending window allocated by OLT10.

[0050] It should be understood that FIG1 is an exemplary structural diagram, and the number of devices included in the optical network shown in FIG1 is not limited, for example, the number of ONUs is not limited. In addition, in addition to the devices shown in FIG1 , the optical network shown in FIG1 may also include other devices, which is not limited.

[0051] Next, as shown in FIG2 , an embodiment of the present disclosure provides an optical network conflict detection method, which is applied to an optical line terminal, which may be the OLT 10 shown in FIG1 . The optical network conflict detection method includes the following S101 to S103 .

[0052] In S101 , in response to detecting the presence of a first coexistence conflict characteristic, uplink transmission of an optical network unit in a second passive optical network is stopped.

[0053] In some embodiments, during operation of the optical network, to ensure reliability of the optical network, the optical line terminal, after enabling a conflict detection function, detects whether a first coexistence conflict characteristic exists in the optical network. If the first coexistence conflict characteristic is detected, upstream transmission of an optical network unit in the second passive optical network is stopped in response to detecting the first coexistence conflict characteristic.

[0054] As an example, the coexistence conflict detection function is enabled by default on the optical line terminal.

[0055] As another example, the optical line terminal periodically enables the coexistence conflict detection function. For example, the optical line terminal automatically enables the coexistence conflict detection function between 6:00 am and 12:00 pm, and automatically disables the coexistence conflict detection function between 12:00 pm and 6:00 am.

[0056] As another example, the optical line terminal determines whether to turn on / off the coexistence conflict detection function according to an instruction sent by a user.

[0057] In some embodiments, during the operation of the optical network, the optical line terminal also records the authentication information of the optical network unit that comes online during operation, such as the media access control (MAC) address of the optical network unit and the serial number (SN) of the optical network unit, so as to facilitate the subsequent positioning of the target optical network unit that causes the coexistence conflict. The optical network unit that comes online during operation includes an unconfigured optical network unit that has not passed authentication.

[0058] In some embodiments, the first coexistence conflict feature includes at least one of the following: abnormal online status of the optical network unit, signal degradation, a bit error rate per unit time greater than a bit error rate threshold, presence of a long light alarm, etc.

[0059] The abnormal online status of the optical network unit refers to the situation in which the ONU suddenly goes offline or repeatedly goes online and offline due to reasons other than optical line termination or offline reasons in the first passive optical network and / or the second passive optical network.

[0060] Signal degradation includes at least one of the following: the number of optical network unit signal quality degradation (ONU identity document, SDi) alarms occurring per unit time is greater than a preset number, and the growth rate of correctable and / or uncorrectable forward error correction (FEC) per unit time is greater than a preset rate threshold. The growth rate of correctable and / or uncorrectable FEC per unit time being greater than the preset rate threshold can be understood as the growth rate of correctable and / or uncorrectable FEC per unit time suddenly accelerating per unit time.

[0061] It should be noted that the above-mentioned bit error rate threshold, preset number of times and preset rate threshold can all be pre-set by network administrators. Network administrators can also change the bit error rate threshold, preset number of times and preset rate threshold according to actual application scenarios, which will not be elaborated here.

[0062] It should be understood that, when the presence of the first coexistence conflict feature is detected, it indicates that the wavelength of one passive optical network may have drifted to the wavelength range of another passive optical network, indicating that there may be a coexistence conflict between the first passive optical network and the second passive optical network. In order to determine whether there is a coexistence conflict between the first passive optical network and the second passive optical network, the uplink transmission of the optical network unit in the second passive optical network can be stopped.

[0063] As an example, detecting the presence of the first coexistence conflict feature may be detecting that the first coexistence conflict feature exists in both the first passive optical network and the second passive optical network. In order to determine whether there is a coexistence conflict between the first passive optical network and the second passive optical network, the uplink transmission of the optical network unit of one of the first passive optical network and the second passive optical network may be randomly stopped, for example, the uplink transmission of the optical network unit in the second passive optical network may be stopped.

[0064] As can be seen from the above description of the first passive optical network and the second passive optical network, the first passive optical network is one of an Ethernet passive optical network and a gigabit passive optical network, and the second passive optical network is the other of the Ethernet passive optical network and the gigabit passive optical network. That is, if the presence of the first coexistence conflict characteristic is detected in both the Ethernet passive optical network and the gigabit passive optical network, uplink transmission of an optical network unit in one of the Ethernet passive optical network and the gigabit passive optical network can be randomly stopped to determine whether a coexistence conflict exists between the Ethernet passive optical network and the gigabit passive optical network.

[0065] As another example, detecting the presence of the first coexistence conflict characteristic may be detecting the presence of the first coexistence conflict characteristic in the first passive optical network. In this manner, uplink transmission of an optical network unit in the second passive optical network may be stopped to determine whether a coexistence conflict exists between the first passive optical network and the second passive optical network. In other words, if the presence of the first coexistence conflict characteristic is detected in one of the two passive optical networks, uplink transmission of an optical network unit in the other of the two passive optical networks is stopped to determine whether a coexistence conflict exists between the two passive optical networks.

[0066] As an example, stopping the uplink transmission of the optical network unit in the second passive optical network may be stopping the uplink transmission of all optical network units in the second passive optical network.

[0067] As another example, stopping the uplink transmission of the optical network units in the second passive optical network may be stopping the uplink transmission of all optical network units in the second passive optical network one by one or in groups until the uplink transmission of all optical network units in the second passive optical network is stopped.

[0068] In some embodiments, stopping the uplink transmission of the optical network unit in the second passive optical network may be stopping the uplink bandwidth allocation to the optical network unit in the second passive optical network and / or turning off the power supply of the optical transmitter of the optical network unit in the second passive optical network.

[0069] In some embodiments, when stopping uplink bandwidth allocation to an optical network unit in the second passive optical network, it is necessary to shield uplink multi-point control protocol (MPCP) timeouts and standard operation, administration, and maintenance (OAM) heartbeat packet timeouts. Turning off the power supply to an optical transmitter of the optical network unit in the second passive optical network may involve an optical line terminal sending a management message to the second passive optical network, the management message being used to instruct the second passive optical network to turn off the power supply to the optical transmitter of the optical network unit in the second passive optical network.

[0070] It should be noted that, depending on the different management protocols of the optical network, the content of the management message sent by the optical line terminal to the second passive optical network is also different. The management message sent can be the ONUTxPowerSupplyControl extended OAM message defined in the "China Telecom EPON Equipment Technical Requirements", or it can be other management messages with similar functions, etc. The embodiments of the present disclosure do not limit this.

[0071] In S102, when it is detected that the first passive optical network has the second coexistence conflict feature, the uplink transmission of the optical network unit in the second passive optical network is restored according to the preset strategy, and the first passive optical network is detected again to see if it has the first coexistence conflict feature.

[0072] In some embodiments, to determine whether there is a coexistence conflict between two PONs, the OLT detects whether there is a second coexistence conflict feature in the first PON after stopping uplink transmission of the ONU in the second PON.

[0073] The coexistence conflict degree represented by the second coexistence conflict characteristic is less than the coexistence conflict degree represented by the first coexistence conflict characteristic.

[0074] It should be understood that, since the degree of coexistence conflict represented by the second coexistence conflict characteristic is less than the degree of coexistence conflict represented by the first coexistence conflict characteristic, detecting whether the first passive optical network has the second coexistence conflict characteristic is to detect whether the degree of coexistence conflict in the first passive optical network is alleviated after stopping the uplink transmission of the optical network unit in the second passive optical network. In the case where the degree of coexistence conflict in the first passive optical network is alleviated, it means that there is a high probability that an optical network unit that causes the coexistence conflict exists in the optical network units whose uplink transmission is stopped. Therefore, the uplink transmission of the optical network units in the second passive optical network is restored according to the preset strategy, and the first passive optical network is detected again for the first coexistence conflict characteristic to identify the target optical network unit that causes the coexistence conflict in the second passive optical network.

[0075] As an example, the coexistence conflict degree represented by the second coexistence conflict characteristic may be 0, indicating that the first coexistence conflict characteristic of the first passive optical network disappears.

[0076] In some embodiments, the preset strategy includes at least one of the following: one-by-one recovery, group recovery, and binary division. In the case of group recovery, each group includes at least two optical network units.

[0077] The following describes various ways of presetting the strategy. For example, it is assumed that the second passive optical network includes eight ONUs, namely, ONU1, ONU2, ONU3, ONU4, ONU5, ONU6, ONU7 and ONU8.

[0078] When the preset strategy is to restore one by one, the uplink transmission of ONU1 can be restored first, then the uplink transmission of ONU2, then the uplink transmission of ONU3, then the uplink transmission of ONU4, then the uplink transmission of ONU5, then the uplink transmission of ONU6, then the uplink transmission of ONU7, and finally the uplink transmission of ONU8.

[0079] When the preset strategy is group recovery, ONU1 and ONU2 can be used as a group to restore upstream transmission first, then ONU3 and ONU4 can be used as a group to restore upstream transmission, then ONU5 and ONU6 can be used as a group to restore upstream transmission, and finally ONU7 and ONU8 can be used as a group to restore upstream transmission.

[0080] When the preset strategy is a binary method, ONU1, ONU2, ONU3, and ONU4 can be used as a group to resume upstream transmission, and a test can be performed to determine whether a first coexistence conflict characteristic exists. If the first coexistence conflict characteristic exists, it indicates that the coexistence conflict may be caused by an ONU among ONU1, ONU2, ONU3, and ONU4. Then, ONU1 and ONU2 can be used as a group to stop upstream transmission and then resume upstream transmission, and a test can be performed to determine whether the first coexistence conflict characteristic exists. If the first coexistence conflict characteristic exists, it indicates that the coexistence conflict may be caused by one of ONU1 and ONU2. Then, ONU1 and ONU2 can be stopped upstream transmission in turn and then resumed upstream transmission, and a test can be performed to determine whether the first coexistence conflict characteristic exists. After ONU1 and ONU2 are grouped together to stop upstream transmission and then resume upstream transmission, and the presence of the first coexistence conflict characteristic is detected, if the first coexistence conflict characteristic is not detected, it indicates that the coexistence conflict is likely not caused by one of ONUs ONU1 and ONU2. In this case, ONU3 and ONU4 can be grouped together to resume upstream transmission and the presence of the first coexistence conflict characteristic can be detected. The following description can refer to the above description of resuming upstream transmission with ONU1 and ONU2 as a group and detecting the presence of the first coexistence conflict characteristic, and is not repeated here.

[0081] After resuming upstream transmission as a group with ONU1, ONU2, ONU3, and ONU4 and detecting whether the first coexistence conflict characteristic exists, if the first coexistence conflict characteristic is not detected, it indicates that the coexistence conflict is likely not caused by an ONU among ONU1, ONU2, ONU3, and ONU4. Therefore, ONU5, ONU6, ONU7, and ONU8 can be resuming upstream transmission as a group and detecting whether the first coexistence conflict characteristic exists. The following description can refer to the above description of resuming upstream transmission as a group with ONU1, ONU2, ONU3, and ONU4, and is not repeated here.

[0082] It should be understood that, when the dichotomy method is adopted to restore the uplink transmission of the optical network unit in the second passive optical network, it helps to improve the efficiency of identifying the target optical network unit causing the coexistence conflict.

[0083] In some embodiments, restoring the uplink transmission of the optical network unit in the second passive optical network may be restoring the uplink bandwidth allocation to the optical network unit in the second passive optical network, and / or sending a management message to turn on the power of the optical transmitter of the optical network unit in the second passive optical network.

[0084] It should be noted that resuming the uplink transmission of the optical network units in the second passive optical network can correspond to the method used to stop the uplink transmission of the optical network units in the second passive optical network. For example, in the case where the uplink transmission of the optical network units in the second passive optical network is stopped one by one, the uplink transmission of the optical network units in the second passive optical network can be restored one by one.

[0085] In some embodiments, in order to make the first coexistence conflict feature of the subsequent first passive optical network easier to detect, when restoring the uplink bandwidth allocation of the optical network unit in the second passive optical network, all remaining bandwidth can be allocated to the optical network unit in the first passive optical network and the optical network unit to be detected in the second passive optical network, so that the uplink burst optical signal occupies the entire time slot as much as possible.

[0086] As an example, if the second coexistence conflict feature is not detected, it means that the coexistence conflict level has not been alleviated, which means that the first coexistence conflict feature may be caused by other reasons. The optical line terminal can issue a prompt message to prompt the network management personnel to inspect the optical network.

[0087] In S103, when the first coexistence conflict feature is detected again in the first passive optical network, the optical network unit that has resumed uplink transmission most recently is determined to be the target optical network unit causing the coexistence conflict.

[0088] It should be understood that the optical line terminal re-detects whether the first coexistence conflict characteristic exists in the first passive optical network after resuming uplink transmission of an optical network unit in the second passive optical network. Therefore, if the first coexistence conflict characteristic is again detected in the first passive optical network, the optical network unit that most recently resumed uplink transmission can be determined to be the target optical network unit that caused the coexistence conflict.

[0089] As an example, when the optical line terminal restores the uplink transmission of the optical network units in the second passive optical network according to the group, when the first coexistence conflict feature is detected again in the first passive optical network, it is indicated that the coexistence conflict is caused by the optical network units in the group of second passive optical networks that restored the uplink transmission the most recently. The optical line terminal can determine that the optical network units in the group of second passive optical networks that restored the uplink transmission the most recently are all target optical network units that caused the coexistence conflict. Alternatively, the optical line terminal stops the uplink transmission of the optical network units in the group of second passive optical networks again, and then restores the uplink transmission of each optical network unit in the group of second passive optical networks one by one, and detects again whether the first coexistence conflict feature exists in the first passive optical network. When the first coexistence conflict feature is detected again in the first passive optical network, it is determined that the optical network unit that restored the uplink transmission the most recently is the target optical network unit that caused the coexistence conflict.

[0090] It should be understood that determining that the optical network unit that most recently resumed uplink transmission is the target optical network unit that caused the coexistence conflict can ensure the accuracy of identifying the target optical network unit; determining that all optical network units in a group of second passive optical networks that most recently resumed uplink transmission are the target optical network units that caused the coexistence conflict can improve the efficiency of identifying the target optical network unit. Those skilled in the art can select an appropriate determination method based on actual application scenarios, and the embodiments of the present disclosure are not limited to this.

[0091] In some embodiments, after determining that an optical network unit is the target optical network unit causing the coexistence conflict, the optical line terminal can stop the uplink transmission of the optical network unit to prevent the optical network unit from causing the coexistence conflict again, which helps to improve the reliability of the optical network.

[0092] Based on the embodiment shown in FIG2 , when the presence of a first coexistence conflict characteristic is detected, it indicates that a coexistence conflict may have occurred. After stopping the uplink transmission of the optical network unit in the second passive optical network, when the presence of a second coexistence conflict characteristic is detected in the first passive optical network, since the degree of coexistence conflict represented by the second coexistence conflict characteristic is less than the degree of coexistence conflict represented by the first coexistence conflict characteristic, it indicates that after stopping the uplink transmission of the optical network unit in the second passive optical network, the degree of coexistence conflict in the first passive optical network has been alleviated, and it is determined that a coexistence conflict exists. Then, according to a preset strategy, the uplink transmission of the optical network unit in the second passive optical network is restored, and the presence of the first coexistence conflict characteristic is detected again. When the presence of the first coexistence conflict characteristic is detected again, the optical network unit that most recently resumed uplink transmission is the target optical network unit that caused the coexistence conflict. In this way, when it is determined that a coexistence conflict characteristic has occurred, the uplink transmission of the optical network unit in the second passive optical network is restored, and whether the first coexistence conflict characteristic exists is detected again, so as to identify the target optical network unit that caused the coexistence conflict, so as to provide guidance for the subsequent elimination of the coexistence conflict, which helps to improve the reliability of the optical network.

[0093] In some embodiments, after re-detecting whether the first passive optical network has the first coexistence conflict characteristic, if the first coexistence conflict characteristic is not detected in the first passive optical network, that is, if the target optical network unit causing the coexistence conflict is not detected, the optical line terminal can stop the uplink transmission of all optical network units in the first passive optical network and resume the uplink transmission of all optical network units in the second passive optical network. After all optical network units in the second passive optical network are detected by the optical line terminal (which can be understood as all optical network units in the second passive optical network are back online), the uplink transmission of the optical network units in the second passive optical network is stopped, and the first passive optical network is re-detected for the second coexistence conflict characteristic, that is, the above S101 and S102 are repeatedly executed until the target optical network unit causing the coexistence conflict is detected.

[0094] The above embodiment is described by taking the example of directly stopping the uplink transmission of the optical network unit in the second passive optical network when the first coexistence conflict feature is detected. In some embodiments, as shown in Figure 3, before stopping the uplink transmission of the optical network unit in the second passive optical network, the optical network conflict detection method also includes the following S201 to S203.

[0095] In S201 , it is determined whether a first optical network unit exists within a preset time period before a first coexistence conflict is detected.

[0096] It is understood that, when the presence of the first coexistence conflict characteristic is detected, the coexistence conflict may be caused by an optical network unit currently connected to the optical line terminal, or by an optical network unit that has recently been connected to the optical line terminal. Therefore, when the presence of the first coexistence conflict characteristic is detected, in response to detecting the presence of the first coexistence conflict characteristic, it is determined whether a first optical network unit existed within a preset time period before the first coexistence conflict was detected. The first optical network unit is an optical network unit that was connected to the optical line terminal within the preset time period. The preset time period may be pre-set by a network administrator, for example, 1 minute.

[0097] In S202, when the first optical network unit exists, uplink transmission of the first optical network unit is stopped, and whether a first coexistence conflict feature exists is detected.

[0098] If the first optical network unit exists, this indicates that a newly connected optical network unit exists within a preset time period before the presence of the first coexistence conflict characteristic is detected. To determine whether the coexistence conflict is caused by the newly connected optical network unit, the optical line terminal stops uplink transmission of the first optical network unit and detects whether the first coexistence conflict characteristic exists.

[0099] In some embodiments, stopping the uplink transmission of the first optical network unit may be stopping the uplink transmission of the first optical network unit in an orderly manner or stopping the uplink transmission of the first optical network unit in an unordered (ie, random) manner.

[0100] In the case of orderly stopping the uplink transmission of the first optical network unit, stopping the uplink transmission of the first optical network unit may include the following X1 and X2.

[0101] In X1, the order in which each first optical network unit stops uplink transmission is determined according to the access time of each first optical network unit to the optical line terminal.

[0102] The order in which each first optical network unit stops uplink transmission is negatively correlated with the access time corresponding to the first optical network unit. That is, the first optical network unit with a shorter access time stops uplink transmission earlier.

[0103] In X2, the uplink transmission of the first optical network units is stopped in sequence according to the order in which each first optical network unit stops the uplink transmission.

[0104] It should be understood that in the presence of a first optical network unit that has been newly accessed to the optical line terminal, the presence of a first coexistence conflict feature is detected. Therefore, the coexistence conflict is more likely to be caused by the first optical network unit of the newly accessed optical line terminal. In the embodiment of the present disclosure, the order in which each first optical network unit stops uplink transmission is determined based on the access time of each first optical network unit to the optical line terminal, which helps to improve the efficiency of identifying the target optical network unit.

[0105] In some embodiments, when the first optical network unit does not exist, the uplink transmission of the optical network unit in the second passive optical network is stopped, that is, the above S101 to S103 are executed, which will not be repeated here.

[0106] In S203 , when no first coexistence conflict feature is detected, the first optical network unit that has stopped uploading transmission most recently is determined to be the target optical network unit causing the coexistence conflict.

[0107] It should be understood that when the first coexistence conflict characteristic is not detected, it means that the first coexistence conflict characteristic disappears. This can be understood as the coexistence conflict disappears after the uplink transmission of a first optical network unit is stopped. In this case, the first optical network unit can be determined as the target optical network unit that caused the coexistence conflict. Therefore, when the first coexistence conflict characteristic is not detected, the first optical network unit that most recently stopped uplink transmission is determined to be the target optical network unit that caused the coexistence conflict.

[0108] In some embodiments, as shown in FIG4 , after S203 , the optical network conflict detection method further includes the following S204 and S205 .

[0109] In S204, the uplink transmission of the second optical network unit is restored, and whether the first coexistence conflict feature exists is detected.

[0110] The second optical network unit is the first optical network unit in the first optical network unit that has stopped uplink transmission.

[0111] In some embodiments, in order to improve the accuracy of identifying the target optical network unit, after stopping the uplink transmission of the first optical network unit and identifying the target optical network unit in the first optical network unit, the uplink transmission of the second optical network unit can be resumed, and whether there is a first coexistence conflict feature can be detected, so as to perform target optical network unit identification again on the second optical network unit that has previously been identified as the target optical network unit, so as to identify whether the target optical network unit exists in the second optical network unit, which helps to improve the accuracy of identifying the target optical network unit.

[0112] As an example, restoring the uplink transmission of the second optical network unit may include the following Y1 and Y2.

[0113] In Y1, the order in which the second optical network units resume uplink transmission is determined according to the time when the second optical network units stop uplink transmission.

[0114] The order in which each second optical network unit resumes uplink transmission is positively correlated with the time at which the second optical network unit stopped uplink transmission. In other words, the shorter the time at which uplink transmission was stopped, the later uplink transmission is resumed. Alternatively, the earlier a second optical network unit stops uplink transmission, the later it resumes uplink transmission.

[0115] In some embodiments, the order in which the second optical network units resume uplink transmission may also be determined based on the access time of the second optical network units to the optical line terminal. The order in which each second optical network unit resumes uplink transmission is positively correlated with the access time corresponding to the second optical network unit.

[0116] In Y2, the uplink transmission of the second optical network units is restored in sequence according to the order in which each second optical network unit restores the uplink transmission.

[0117] It should be understood that, in order to ensure the reliability of the optical network, the first optical network unit that has been determined as the target optical network unit does not need to resume uplink transmission.

[0118] In S205 , when the presence of the first coexistence conflict feature is detected, the second optical network unit that has most recently resumed uplink transmission is determined to be the target optical network unit causing the coexistence conflict.

[0119] It should be understood that when the presence of the first coexistence conflict feature is detected, it means that after the uplink transmission of a second optical network unit is restored, the coexistence conflict occurs again, then the second optical network unit that most recently restored the uplink transmission can be used as the target optical network unit that caused the coexistence conflict.

[0120] In this way, after stopping the uplink transmission of the first optical network unit and identifying the target optical network unit in the first optical network unit, the uplink transmission of the second optical network unit can be restored, and whether the first coexistence conflict feature exists can be detected, so that the target optical network unit of the second optical network unit that has been previously identified as the target optical network unit can be identified again, so as to identify whether the target optical network unit exists in the second optical network unit, which helps to improve the accuracy of identifying the target optical network unit.

[0121] In some embodiments, as shown in FIG5 , after S202 , the optical network conflict detection method further includes the following S301 and S302 .

[0122] In S301, when the presence of the first coexistence conflict characteristic is detected, the discovery window of the target passive optical network is closed, and whether the first coexistence conflict characteristic exists is detected again.

[0123] It should be understood that when the presence of the first coexistence conflict feature is detected, it means that after stopping the uplink transmission of all first optical network units, the first coexistence conflict feature still exists, that is, the coexistence conflict has not disappeared. In order to identify the target optical network unit, the optical line terminal closes the discovery window of the target passive optical network and detects again whether the first coexistence conflict feature exists.

[0124] The discovery window, also known as the discovery gate in 10G EPON, is used in a passive optical network (PON) to discover optical network units (ONUs) that are connected to the optical distribution network (ODN) but not yet online. The target PON is a PON of the same type as the first ONU in the first and second PONs.

[0125] Exemplarily, assuming that the first passive optical network is EPON and the second passive optical network is GPON, if the first optical network unit is an EPON ONU, after comparison, the type of the first optical network unit is the same as the type of the first passive optical network, then the first passive optical network is determined to be the target passive optical network.

[0126] In S302 , when the first coexistence conflict feature is detected again, the third optical network unit is determined to be the target optical network unit causing the coexistence conflict.

[0127] It should be understood that, when the presence of the first coexistence conflict feature is detected again, it means that even after the discovery window of the target passive optical network is closed, the first coexistence conflict feature has not disappeared, that is, the coexistence conflict still exists, and the degree of coexistence conflict is so serious that the first optical network unit newly connected to the ODN cannot be discovered at all, so that the authentication information of the first optical network unit cannot be obtained. However, in the process of the first optical network unit attempting to discover, it is still possible to affect the normal operation of the optical network unit in the passive optical network of a different type from the first optical network unit. Therefore, when the presence of the first coexistence conflict feature is detected again, the third optical network unit is determined to be the target optical network unit that causes the coexistence conflict. The third optical network unit is an optical network unit that is not online in the first optical network unit. The third optical network unit can also be understood as an optical network unit that has accessed the optical path but has never been discovered (not online).

[0128] Based on the embodiment shown in Figure 5, the presence of the first coexistence conflict feature is detected again when the uplink transmission of all first optical network units is stopped. By closing the discovery window of the target passive optical network, the target optical network unit is detected, which helps to improve the accuracy of identifying the target optical network unit.

[0129] In some embodiments, after the target optical network unit is determined, for example, after S103, S203, S205 or S302, as shown in FIG6, the optical network conflict detection method further includes the following S401: issuing an alarm message.

[0130] The warning information is used to prompt the existence of a coexistence conflict, and the warning information includes an identifier of a target optical network unit. The identifier of the target optical network unit is used to uniquely indicate the target optical network unit, for example, it can be a MAC address of the target optical network unit.

[0131] It should be understood that after the target optical network unit is determined, an alarm message is issued to remind network management personnel that a coexistence conflict exists and maintenance is required, which helps to improve the reliability of the optical network. In addition, the alarm message includes the identification of the target optical network unit, so that network management personnel can accurately inspect the target optical network unit based on the identification of the target optical network unit, eliminate the coexistence conflict, and improve the efficiency and accuracy of eliminating the coexistence conflict.

[0132] As an example, an optical network conflict detection method provided by an embodiment of the present disclosure can be applied to the coexistence conflict (wavelength conflict) between EPON and GPON caused by the EPON upstream wavelength drifting into the GPON upstream wavelength range due to factors such as ambient temperature changes or ONU laser aging during the operation of the optical network, as well as the first detection after the OLT restart or cutover. The embodiment of the present disclosure does not limit this.

[0133] An optical network conflict detection method provided by an embodiment of the present disclosure is described below with reference to an example.

[0134] For example, taking the first passive optical network as 10G EPON and the second passive optical network as 50G PON as an example, as shown in FIG7 , it is a schematic diagram of the overall flow of an optical network conflict detection method provided by an embodiment of the present disclosure.

[0135] In S1, during the operation of the optical network, the optical line terminal records the authentication information of the 10G EPON ONUs and 50G PON ONUs that are online and newly connected during operation, and detects whether the 50G PON and 10G EPON have the first coexistence conflict feature.

[0136] In S2, when it is detected that the 50G PON has the first coexistence conflict feature, the optical line terminal determines whether there is a newly connected 10G EPON ONU before a preset time period.

[0137] If there is a newly connected 10G EPON ONU, then the following S3-S8 are executed. If there is no newly connected 10G EPON ONU, then the following S9-S11 are executed.

[0138] In S3, the uplink transmission of the newly connected 10G EPON ONU is stopped, and it is detected whether there is a first coexistence conflict feature.

[0139] If the first coexistence conflict feature is detected, the following S4 and S5 are executed; if the first coexistence conflict feature is not detected, the following S6 to S8 are executed.

[0140] For the relevant description of S2 and S3, please refer to the above description of S202 to S203, which will not be repeated here.

[0141] In S4, the 10G EPON discovery window is closed, and whether the first coexistence conflict feature exists is detected again.

[0142] In S5, when the first coexistence conflict feature is detected again, the ONU that is not online in the newly connected 10G EPON ONU is determined as the target optical network unit causing the coexistence conflict.

[0143] For the description of S4 and S5, please refer to the above description of S301 to S302, which will not be repeated here.

[0144] In S6, when no first coexistence conflict feature is detected, the 10G EPON ONU that has stopped uplink transmission most recently is determined to be the target optical network unit causing the coexistence conflict.

[0145] In S7, the uplink transmission of the newly connected 10G EPON ONU that has stopped uplink transmission is resumed, and whether the first coexistence conflict feature exists is detected.

[0146] In S8, when the presence of the first coexistence conflict feature is detected, the 10G EPON ONU that has most recently resumed uplink transmission is determined as the target optical network unit causing the coexistence conflict.

[0147] For the description of S6 to S8, please refer to the description of S203 to S205 above, which will not be repeated here.

[0148] In S9, the uplink transmission of the ONU in the 10G EPON is stopped, and it is detected whether the 50G PON has the second coexistence conflict feature.

[0149] In S10, when it is detected that the 50G PON has the second coexistence conflict characteristic, the uplink transmission of the 10G EPON ONU is restored according to the preset strategy, and the 50G PON is detected again to see whether it has the first coexistence conflict characteristic.

[0150] In S11, when the first coexistence conflict feature is detected again in the 50G PON, the 10G EPON ONU that has resumed uplink transmission most recently is determined to be the target optical network unit causing the coexistence conflict.

[0151] For the description of S9 to S11, please refer to the above description of S101 to S103, which will not be repeated here.

[0152] In S12, an alarm message is issued.

[0153] In some embodiments, after the target optical network unit is determined, the optical line terminal sends an alarm message. For a description of the alarm message, reference may be made to the description of the alarm message in S401 above, which will not be repeated here.

[0154] The above mainly introduces the solution provided by the present disclosure from the perspective of the interaction between various nodes. It can be understood that, in order to realize the above functions, each node, such as an optical line terminal, includes a hardware structure and / or software module corresponding to the execution of each function. It should be easy for those skilled in the art to realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware-driven or computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

[0155] FIG8 is a schematic diagram showing the composition of a communication device according to an embodiment of the present disclosure. As shown in FIG8 , the communication device 50 includes a processing unit 501 and a sending unit 502 .

[0156] The communication device 50 may be the above-mentioned optical line terminal or a chip in the optical line terminal. When the communication device 50 is used to implement the functions of the optical line terminal in the above-mentioned embodiment, each unit is used to implement the following functions.

[0157] The processing unit 501 is used to: in response to detecting the presence of a first coexistence conflict feature, stop the uplink transmission of the optical network unit in the second passive optical network; in the case of detecting the presence of a second coexistence conflict feature in the first passive optical network, restore the uplink transmission of the optical network unit in the second passive optical network according to a preset strategy, and re-detect whether the first coexistence conflict feature exists in the first passive optical network, the coexistence conflict degree represented by the second coexistence conflict feature is less than the coexistence conflict degree represented by the first coexistence conflict feature; in the case of detecting the presence of the first coexistence conflict feature in the first passive optical network again, determine that the optical network unit that most recently resumed uplink transmission is the target optical network unit that caused the coexistence conflict.

[0158] In some embodiments, the first coexistence conflict feature includes at least one of the following: abnormal online status of the optical network unit, signal degradation, a bit error rate per unit time greater than a bit error rate threshold, and the presence of a long light alarm.

[0159] In some embodiments, the preset strategy includes at least one of the following: one-by-one recovery, group recovery, and binary division.

[0160] In some embodiments, the processing unit 501 is configured to, for example, stop allocating uplink bandwidth to the optical network unit in the second passive optical network, and / or turn off the power supply of the optical transmitter of the optical network unit in the second passive optical network.

[0161] In some embodiments, the processing unit 501 is further used to: determine whether there is a first optical network unit within a preset time period before the presence of the first coexistence conflict feature is detected, the first optical network unit being an optical network unit that is connected to the optical line terminal within the preset time period; if the first optical network unit exists, stop the uplink transmission of the first optical network unit, and detect whether there is a first coexistence conflict feature; if the first coexistence conflict feature is not detected, determine that the first optical network unit that stopped uplink transmission for the most recent time is the target optical network unit that caused the coexistence conflict.

[0162] In some embodiments, the processing unit 501 is further configured to: resume uplink transmission of the second optical network unit and detect whether the first coexistence conflict characteristic exists. The second optical network unit is the first optical network unit in the first optical network unit that has stopped uplink transmission;

[0163] In a case where the first coexistence conflict feature is detected, the second optical network unit that has most recently resumed uplink transmission is determined as the target optical network unit causing the coexistence conflict.

[0164] In some embodiments, the processing unit 501 is further used to: when the presence of the first coexistence conflict feature is detected, close the discovery window of the target passive optical network, and re-detect whether the first coexistence conflict feature exists, where the target passive optical network is a passive optical network of the same type as the first optical network unit in the first passive optical network and the second passive optical network; when the presence of the first coexistence conflict feature is detected again, determine that the third optical network unit is the target optical network unit that causes the coexistence conflict, and the third optical network unit is an optical network unit that is not online in the first optical network unit.

[0165] In some embodiments, the processing unit 501 is further configured to stop uplink transmission of the optical network unit in the second passive optical network when the first optical network unit does not exist.

[0166] In some embodiments, the processing unit 501 is used, for example, to: determine the order in which each first optical network unit stops uplink transmission based on the access time of each first optical network unit accessing the optical line terminal, and the order in which each first optical network unit stops uplink transmission is negatively correlated with the access time corresponding to the first optical network unit; and stop the uplink transmission of the first optical network units in sequence according to the order in which each first optical network unit stops uplink transmission.

[0167] In some embodiments, the processing unit 501 is used, for example, to: determine the order in which the second optical network units resume uplink transmission based on the time when the second optical network units stop uplink transmission, and the order in which each second optical network unit resumes uplink transmission is positively correlated with the time when the corresponding second optical network unit stops uplink transmission; and resume the uplink transmission of the second optical network units in sequence based on the order in which each second optical network unit resumes uplink transmission.

[0168] In some embodiments, the first passive optical network is one of an Ethernet passive optical network and a gigabit passive optical network, and the second passive optical network is the other of the Ethernet passive optical network and the gigabit passive optical network.

[0169] Ethernet passive optical networks include at least one of the following: 1G Ethernet passive optical network and 10G Ethernet passive optical network. Gigabit passive optical networks include 50G Gigabit passive optical network. 10G Ethernet passive optical network includes at least one of the following modes: 10G Ethernet passive optical network asymmetric mode and 10G Ethernet passive optical network symmetric mode.

[0170] In some embodiments, the sending unit 502 is configured to send an alarm message. The alarm message is used to prompt the existence of a coexistence conflict, and the alarm message includes an identifier of a target optical network unit.

[0171] It should be noted that the units in Figure 8 may also be referred to as modules, for example, the sending unit may be referred to as a sending module. In addition, in the embodiment shown in Figure 8, the names of the units may not be those shown in the figure, for example, the sending unit may also be referred to as a communication unit.

[0172] If the various units in Figure 8 are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present disclosure is essentially or the part that contributes to some technologies or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the various embodiments of the present disclosure. The storage medium for storing computer software products includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0173] While the communication device 50 implements the functions of the integrated modules in hardware, the present disclosure provides a schematic diagram of another communication device structure. As shown in Figure 9, the communication device 60 includes a processor 602, a communication interface 603, and a bus 604. In some embodiments, the communication device 60 may also include a memory 601.

[0174] Processor 602 may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the present disclosure. Processor 602 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof, and may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the present disclosure. Processor 602 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, or a combination of a DSP and a microprocessor.

[0175] The communication interface 603 is used to connect to other devices via a communication network, such as Ethernet, wireless access network, or wireless local area network (WLAN).

[0176] The memory 601 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0177] As an implementation, memory 601 may exist independently of processor 602. Memory 601 may be connected to processor 602 via bus 604 to store instructions or program codes. When processor 602 calls and executes the instructions or program codes stored in memory 601, the optical network conflict detection method provided in the embodiments of the present disclosure can be implemented.

[0178] In another implementation, the memory 601 may also be integrated with the processor 602 .

[0179] Bus 604 can be an Extended Industry Standard Architecture (EISA) bus, etc. Bus 604 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, FIG9 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0180] Through the description of the above implementation methods, those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the optical line terminal can be divided into different functional modules to complete all or part of the functions described above.

[0181] The embodiments of the present disclosure also provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium). All or part of the processes in the above-mentioned method embodiments can be completed by computer instructions to instruct relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be the memory or memory of any of the above-mentioned embodiments. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned optical line terminal, such as a plug-in hard disk, a smart memory card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the above-mentioned optical line terminal. Furthermore, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned optical line terminal and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned optical line terminal. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0182] The embodiments of the present disclosure further provide a computer program product, which includes a computer program. When the computer program product is run on a computer, the computer is enabled to execute any one of the optical network conflict detection methods provided in the above embodiments.

[0183] In an embodiment of the present disclosure, when the presence of a first coexistence conflict characteristic is detected, it indicates that a coexistence conflict may have occurred. After stopping the uplink transmission of the optical network unit in the second passive optical network, when the presence of a second coexistence conflict characteristic is detected in the first passive optical network, since the degree of coexistence conflict represented by the second coexistence conflict characteristic is less than the degree of coexistence conflict represented by the first coexistence conflict characteristic, it indicates that after stopping the uplink transmission of the optical network unit in the second passive optical network, the degree of coexistence conflict in the first passive optical network has been alleviated, and it is determined that a coexistence conflict exists. Then, the uplink transmission of the optical network unit in the second passive optical network is restored according to a preset strategy, and the presence of the first coexistence conflict characteristic is detected again. When the presence of the first coexistence conflict characteristic is detected again, the optical network unit that most recently restored the uplink transmission is the target optical network unit that caused the coexistence conflict. In this way, when it is determined that a coexistence conflict characteristic has occurred, the uplink transmission of the optical network unit in the second passive optical network is restored, and whether the first coexistence conflict characteristic exists is detected again, so as to identify the target optical network unit causing the coexistence conflict, so as to provide guidance for the subsequent elimination of the coexistence conflict, which helps to improve the reliability of the optical network.

[0184] Although the present disclosure is described herein in conjunction with various embodiments, in the process of implementing the disclosure for which protection is sought, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple components. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0185] Although the present disclosure has been described with reference to specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present disclosure. Accordingly, this specification and the drawings are merely illustrative of the present disclosure as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present disclosure. Obviously, those skilled in the art may make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, the present disclosure is intended to encompass such modifications and variations if they fall within the scope of the claims of the present disclosure and their equivalents.

[0186] The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or replacements within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. An optical network conflict detection method, applied to an optical line terminal, wherein the optical line terminal is connected to a first passive optical network and a second passive optical network, and the transmission protocols of the first passive optical network and the second passive optical network are different, and the method comprises: In response to detecting the presence of the first coexistence conflict characteristic, stopping uplink transmission of the optical network unit in the second passive optical network; In the case of detecting that the first passive optical network has a second coexistence conflict characteristic, restoring the uplink transmission of the optical network unit in the second passive optical network according to a preset strategy, and detecting again whether the first passive optical network has the first coexistence conflict characteristic; wherein the coexistence conflict degree represented by the second coexistence conflict characteristic is less than the coexistence conflict degree represented by the first coexistence conflict characteristic; When the first coexistence conflict feature is detected again in the first passive optical network, the optical network unit that has restored uplink transmission most recently is determined to be the target optical network unit causing the coexistence conflict.

2. The method according to claim 1, wherein: The first coexistence conflict feature includes at least one of the following: abnormal online status of the optical network unit, signal degradation, a bit error rate per unit time greater than a bit error rate threshold, and the presence of a long light alarm.

3. The method according to claim 1, wherein: The preset strategy includes at least one of the following: one-by-one recovery, group recovery, and dichotomy.

4. The method according to claim 1, wherein: The stopping of the uplink transmission of the optical network unit in the second passive optical network includes: Stop allocating uplink bandwidth to the optical network unit in the second passive optical network, and / or turn off the power of the optical transmitter of the optical network unit in the second passive optical network.

5. The method according to claim 1, wherein: Before stopping the uplink transmission of the optical network unit in the second passive optical network, the method further includes: Determining whether there is a first optical network unit within a preset time period before the first coexistence conflict feature is detected; the first optical network unit is an optical network unit connected to the optical line terminal within the preset time period; In the case where the first optical network unit exists, stopping uplink transmission of the first optical network unit, and detecting whether the first coexistence conflict feature exists; In a case where the first coexistence conflict feature is not detected, the first optical network unit that has stopped uplink transmission most recently is determined to be the target optical network unit causing the coexistence conflict.

6. The method according to claim 5, wherein: After determining that the first optical network unit that stopped uplink transmission most recently is the target optical network unit causing the coexistence conflict, the method further includes: Resuming uplink transmission of a second optical network unit, and detecting whether the first coexistence conflict feature exists; the second optical network unit is the first optical network unit in the first optical network unit that has stopped uplink transmission; In the case where the first coexistence conflict feature is detected, the second optical network unit that has most recently resumed uplink transmission is determined as the target optical network unit causing the coexistence conflict.

7. The method according to claim 5, wherein: After stopping the uplink transmission of the first optical network unit and detecting whether the first coexistence conflict feature exists, the method further includes: When the first coexistence conflict feature is detected, closing the discovery window of the target passive optical network and detecting again whether the first coexistence conflict feature exists; the target passive optical network is a passive optical network of the same type as the first optical network unit in the first passive optical network and the second passive optical network; When the first coexistence conflict feature is detected again, a third optical network unit is determined to be the target optical network unit causing the coexistence conflict; the third optical network unit is an optical network unit that is not online in the first optical network unit.

8. The method according to claim 5, further comprising: In the case where the first optical network unit does not exist, stopping the uplink transmission of the optical network unit in the second passive optical network is performed.

9. The method according to claim 5, wherein: The stopping of the uplink transmission of the first optical network unit includes: Determine the order in which each of the first optical network units stops uplink transmission according to the access time of each of the first optical network units accessing the optical line terminal; wherein the order in which each of the first optical network units stops uplink transmission is negatively correlated with the access time corresponding to the first optical network unit; According to the order in which each of the first optical network units stops the uplink transmission, the uplink transmission of the first optical network units is stopped in sequence.

10. The method according to claim 6, wherein: The restoring the uplink transmission of the second optical network unit includes: Determine the order in which the second optical network units resume uplink transmission according to the time when the second optical network units stop uplink transmission; wherein the order in which each of the second optical network units resumes uplink transmission is positively correlated with the time when the second optical network units stop uplink transmission; According to the order in which each of the second optical network units resumes uplink transmission, the uplink transmission of the second optical network units is resumed in sequence.

11. The method according to claim 1, wherein: The first passive optical network is one of an Ethernet passive optical network and a gigabit passive optical network, and the second passive optical network is the other of the Ethernet passive optical network and the gigabit passive optical network; The Ethernet passive optical network includes at least one of the following: 1G Ethernet passive optical network, 10G Ethernet passive optical network, the gigabit passive optical network includes a 50G gigabit passive optical network; the 10G Ethernet passive optical network includes at least one of the following modes: 10G Ethernet passive optical network asymmetric mode, 10G Ethernet passive optical network symmetric mode.

12. The method according to any one of claims 1 to 11, further comprising: An alarm message is issued, where the alarm message is used to prompt the existence of a coexistence conflict, and the alarm message includes an identifier of the target optical network unit.

13. A communication device, comprising: Processor and memory; Wherein, the memory stores instructions executable by the processor; When the processor is configured to execute the instructions, the communication device implements the method according to any one of claims 1 to 12.

14. A computer-readable storage medium, wherein: The computer-readable storage medium comprises computer instructions, which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 12.

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