WO2023024924A1 - 路由切换方法、节点、路由设备、存储介质 - Google Patents

路由切换方法、节点、路由设备、存储介质 Download PDF

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Publication number
WO2023024924A1
WO2023024924A1 PCT/CN2022/111795 CN2022111795W WO2023024924A1 WO 2023024924 A1 WO2023024924 A1 WO 2023024924A1 CN 2022111795 W CN2022111795 W CN 2022111795W WO 2023024924 A1 WO2023024924 A1 WO 2023024924A1
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Prior art keywords
dispersion
route
receiving end
optical probe
sending
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PCT/CN2022/111795
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English (en)
French (fr)
Inventor
安航
张明超
朱晓宇
赵志勇
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/038—Arrangements for fault recovery using bypasses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
    • H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted

Definitions

  • the present application relates to but not limited to the field of optical communication, and in particular relates to a routing switching method, a node, a routing device, and a storage medium.
  • ASON Automatically Switched Optical Network
  • OTN Optical Transport Network
  • dispersion compensation needs to be performed at the receiving end.
  • the magnitude of the dispersion will be affected by the physical characteristics of the route, so the dispersion compensation parameters applicable to different routes are different.
  • Dispersion compensation parameters need to be determined through dispersion search, but the current method needs to traverse all dispersion search ranges in the band, and the larger the search range, the longer the time spent. For the protection switching system, it is likely that the large dispersion search range will cause the protection switching to time out and affect the service recovery.
  • Embodiments of the present application provide a route switching method, a node, a routing device, and a storage medium.
  • the embodiment of the present application provides a routing switching method, which is applied to the main control node of ASON, and the main control node is connected to the sending end and the receiving end respectively, and the sending end and the receiving end are connected by communication.
  • a primary route and a standby route for transmitting services are configured, and the route switching method includes: if it is determined that the operating state of the primary route changes to a fault state, sending a dispersion search range to the receiving end, so that the receiving end and the The sending end communicates service data through the backup route, wherein the dispersion compensation parameter applied by the receiving end is obtained by the receiving end performing a dispersion search on the backup route within the dispersion search range.
  • the embodiment of the present application provides a routing switching method, which is applied to the sending end, the sending end is connected to the receiving end through communication, and the sending end and the receiving end are respectively connected to the main control node of ASON through communication,
  • a primary route and a standby route for transmitting services are configured between the sending end and the receiving end
  • the route switching method includes: communicating service data with the receiving end through the standby route, wherein the receiving end
  • the dispersion compensation parameter applied by the end is obtained by the receiving end performing a dispersion search on the backup route within the dispersion search range, and the dispersion search range is determined by the master control node when the operating state of the main route is changed to a fault state In the case of sending to the receiving end.
  • the embodiment of the present application provides a routing switching method, which is applied to the receiving end, and the receiving end is communicatively connected to the sending end, and the sending end and the receiving end are respectively connected to the main control node of ASON through communication,
  • a primary route and a standby route for transmitting services are configured between the sending end and the receiving end
  • the route switching method includes: obtaining a dispersion search range sent by the master control node, wherein the dispersion search range is determined by the The master control node sends when it is determined that the operating state of the main route is changed to a fault state; within the dispersion search range, perform a dispersion search for the backup route to obtain a dispersion compensation parameter; apply the dispersion compensation parameter , performing service data communication with the sending end through the standby route.
  • an embodiment of the present application provides a master control node, including: a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the following when executing the computer program: The route switching method described in the first aspect.
  • the embodiment of the present application provides a routing device, including: a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the following when executing the computer program.
  • the routing switching method according to the second aspect; or, the routing switching method according to the third aspect is implemented when the processor executes the computer program.
  • Fig. 1 is a flow chart of the routing switching method provided by one embodiment of the present invention.
  • FIG. 2 is a flow chart of determining that the main route is in a fault state provided by another embodiment of the present application
  • Fig. 3 is a flow chart of determining the dispersion search range provided by another embodiment of the present application.
  • FIG. 4 is a flowchart of determining a dispersion reference value provided by another embodiment of the present application.
  • Fig. 5 is a flowchart of determining a dispersion reference value provided by another embodiment of the present application.
  • FIG. 6 is a flow chart of measuring the transmission delay of optical probe signals provided by another embodiment of the present application.
  • Fig. 7 is a flowchart of determining a dispersion reference value provided by another embodiment of the present application.
  • FIG. 8 is a flow chart of obtaining transmission delay provided by another embodiment of the present application.
  • FIG. 9 is a flow chart of saving reference dispersion values provided by another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a sending end and a receiving end provided by another embodiment of the present application.
  • FIG. 11 is a flowchart of a route switching method provided in another embodiment of the present application.
  • Fig. 12 is a flowchart of determining a dispersion reference value provided by another embodiment of the present application.
  • FIG. 13 is a flowchart of a route switching method provided in another embodiment of the present application.
  • Fig. 14 is a flowchart of determining a dispersion reference value provided by another embodiment of the present application.
  • FIG. 15 is an apparatus diagram of a master control node provided by another embodiment of the present application.
  • Fig. 16 is an apparatus diagram of a routing device provided by another embodiment of the present application.
  • the present application provides a route switching method, a node, a routing device, and a storage medium.
  • the route switching method includes: if it is determined that the operating state of the main route has changed to a fault state, sending a dispersion search range to the receiving end, so that all The receiving end and the sending end perform service data communication through the standby route, wherein the dispersion compensation parameter applied by the receiving end is performed by the receiving end within the dispersion search range for the standby route. get.
  • the dispersion search range can be configured for the receiving end without in-band traversal, which effectively reduces the time spent on dispersion search, thereby improving the switching efficiency of the standby route and reducing the timeout risk of protection switching. Ensure quick business recovery.
  • Figure 1 is a routing switching method provided by an embodiment of the present application, which is applied to the master control node of ASON.
  • Configure the primary route and standby route for the transmission service, and the route switching methods include:
  • Step S110 if it is determined that the operating state of the main route is changed to a failure state, send the dispersion search range to the receiving end, so that the receiving end and the sending end can communicate service data through the backup route, wherein the dispersion compensation parameters applied by the receiving end are determined by the receiving end
  • the terminal performs dispersion search on the standby route within the dispersion search range.
  • the dispersion of the route usually depends on the physical characteristics of the optical fiber link. Therefore, when the optical fiber link of the route remains unchanged, the dispersion can also be considered the same. Based on this, through the master control node to the The receiving end distributes the dispersion search range, so that the receiving end can perform the dispersion search within a smaller range, thereby reducing the time spent on the dispersion search and improving the efficiency of route switching.
  • the dispersion search range can be preset or calculated according to the set routing parameters. Of course, it can also be measured before the dispersion search is performed at the receiving end.
  • the specific acquisition method of the dispersion search range in this embodiment Not much to limit.
  • step S110 in the embodiment shown in Fig. 1 also includes but is not limited to the following steps:
  • Step S210 acquiring the fault information sent by the network management system, the fault information carrying the fault service identifier
  • step S220 if the service identifier of the transmission service matches the failure service identifier, it is determined that the operation state of the main route of the transmission service is changed to a failure state.
  • the fault detection of the main route can be completed by the network management system based on WDM/OTN Automatically Switched Optical Network (WDM/OTN Automatically Switched Optical Network, WASON, wherein, Wavelength Division Multiplexing, WDM) , if WASON detects a fault in the fiber link, determine the transmission service involved in the fiber link and obtain the service ID, add it as the fault service ID to the alarm information and send it to the master control node, thereby triggering the master control node to issue the dispersion search range .
  • WDM/OTN Automatically Switched Optical Network WASON
  • WDM/OTN Automatically Switched Optical Network WASON
  • WDM Wavelength Division Multiplexing
  • the faulty service ID can be the business ID of the business, and the business ID can be in any form, such as a common business identity number (Identity document, ID).
  • ID a common business identity number
  • the master control node After the master control node obtains the faulty service ID, it can match the faulty service ID with the locally configured service ID to determine the transmission service that needs protection switching, so as to perform route switching.
  • Step S310 obtaining the reference dispersion value of the standby route
  • Step S320 determining the dispersion search range according to the reference dispersion value and preset search conditions.
  • the reference dispersion value can be the value stored in the main control node in advance. If the main route of the transmission service fails, the corresponding reference dispersion value can be queried according to the service ID of the transmission service; it can also be the value in the main route In the case of a fault, it is obtained by measuring the standby route, and this embodiment does not limit the specific acquisition method of the reference dispersion value.
  • the reference dispersion value may be a specific value of dispersion.
  • the dispersion search range may be determined according to preset search conditions. For example, according to the set threshold, the reference dispersion value is added to The upper limit of the dispersion search range is obtained by the threshold value, and the lower limit of the dispersion search range is obtained by subtracting the threshold value from the reference dispersion value, and the interval formed by the upper limit and the lower limit is used as the dispersion search range; value query to find out the corresponding dispersion search range; another example, pre-set the function expression, and substitute the reference dispersion value into the function expression to obtain a curve describing the dispersion value, and use the value range of the curve as the dispersion search range , those skilled in the art have the motivation to adjust the search conditions according to actual needs, and no more limitations are made here.
  • step S310 in the embodiment shown in FIG. 3 also includes but is not limited to the following steps:
  • Step S410 determining a reference dispersion value from pre-saved dispersion values according to the service identifier.
  • the dispersion value can also be considered the same. Therefore, the reference dispersion value can be measured in advance for each standby route, so that in the case of failure of the main route The reference dispersion value can be obtained directly to determine the dispersion search range, which further improves the efficiency of determining the dispersion compensation parameters of the backup route.
  • step S310 in the embodiment shown in FIG. 3 also includes but is not limited to the following steps:
  • Step S510 sending dispersion measurement information to the sending end, so that the sending end sends at least two optical probe signals to the receiving end, wherein the wavelengths of the at least two optical probe signals are different from each other;
  • Step S520 determine the transmission delay of the optical probe signal, and determine at least one transmission delay difference, where the transmission delay difference is the difference between the transmission delays of the two optical probe signals;
  • Step S530 obtaining the route length information of the standby route, and determining at least one dispersion coefficient, wherein the dispersion coefficient is obtained according to the transmission delay difference, the wavelength difference of the two optical probe signals corresponding to the transmission delay difference, and the route length information;
  • Step S540 determining a reference dispersion value according to at least one dispersion coefficient.
  • the optical probe signal is a probe signal that can simulate service signal light, and parameters such as the wavelength and bandwidth of the optical probe signal can be adjusted according to actual needs.
  • the reference dispersion value can better simulate the actual transmission of service optical signals, so that the measured reference dispersion value has a better reference value.
  • the dispersion measurement information sent to the sending end may include specific measurement requirements, such as the number of optical probe signals to be sent, the wavelength of each optical probe signal, etc., which can trigger the sending end to send At least two optical probe signals are sufficient.
  • the wavelength of the optical probe signal can be realized by adjusting the signal amplifier and signal adjuster at the sending end, and it only needs to make the wavelengths of the optical probe signals different from each other.
  • the transmitting end and the receiving end shown in Figure 6 are provided with an optical transmission unit (Optical Transform Unit, OTU), and the transmitting end sends i wavelength distributions to the OUT of the receiving end through OUT as ( ⁇ 1 , ⁇ 2 ⁇ i ), where i is a natural number greater than or equal to 2, since each optical probe signal will produce a dispersion effect in the process of optical fiber transmission, so according to the optical probe signal received by the receiving end .
  • OTU optical Transform Unit
  • the transmission delay of the optical probe signal can be determined by sending time information and receiving time information, and the acquisition of sending time information and receiving time information can be determined by the time stamp of the local timer, or by The form of modulating the optical label information in the signal is obtained.
  • Those skilled in the art know how to obtain the sending time information and receiving time of the optical probe signal, and there is no limitation here. For example, as shown in FIG .
  • the sending time of the probe signal is t 11
  • the receiving time is t 12
  • the value can be determined by the configuration parameters of the sending end and the receiving end.
  • the sending time of the optical probe signal with a wavelength of ⁇ 2 is t 21
  • the receiving time is t 22
  • the route length information of the standby route depends on the length of the fiber link, and the length of the fiber link is usually fixed and known, so the route length information can be set in the master control node in advance, so that when calculating Direct access to use.
  • the dispersion coefficient can be calculated by the following formula: Where ⁇ t 1 is the transmission delay difference obtained above, L is the route length information ⁇ 1 and ⁇ 2 are the wavelengths of the two optical probe signals respectively.
  • each dispersion coefficient requires the parameters of two optical probe signals to be determined, but it does not necessarily require two continuously sent optical probe signals. In different cases, the dispersion coefficient can be calculated by using any two optical probe signals, and details will not be described here.
  • the dispersion coefficient can be directly used as the reference dispersion value. If there is a need to reduce the error, multiple dispersion coefficients can also be calculated and obtained by statistical means or by fitting the curve.
  • the reference dispersion value can be estimated by the method, and the specific method can be selected according to the actual needs.
  • step S540 in the embodiment shown in FIG. 5 also includes but is not limited to the following steps:
  • Step S710 if the number of dispersion coefficients is one, determine the dispersion coefficient as a reference dispersion value
  • Step S720 if there are at least two dispersion coefficients, fitting a dispersion curve according to the at least two dispersion coefficients, and estimating a reference dispersion value according to the dispersion curve.
  • the reference dispersion value is the data basis for determining the dispersion search range, since the reference dispersion value is determined by the parameters of the two optical probe signals , there may be a certain error, and the number of dispersion coefficients can be adjusted according to the allowable range of the error.
  • a dispersion coefficient can be calculated from two optical probe signals and directly determined as the reference dispersion
  • multiple sets of optical probe signals can be selected to obtain multiple dispersion coefficients, and the dispersion curve can be fitted to estimate a more accurate reference dispersion value.
  • dispersion curve After obtaining at least two dispersion coefficients, those skilled in the art know how to fit multiple values to obtain related curves, for example, establish a coordinate system with dispersion coefficients and wavelengths, and use the mathematical relationship between the two to obtain The dispersion curve, and the corresponding reference dispersion value is calculated by a statistical method, which is not limited in this embodiment.
  • step S520 in the embodiment shown in FIG. 5 also includes but is not limited to the following steps:
  • Step S810 acquiring the sending time information and receiving time information of the optical probe signal
  • Step S820 acquiring a time offset reference value between the sending end and the receiving end
  • step S830 the transmission delay is obtained according to the sending time information, receiving time information and time offset reference value.
  • the sending time information and receiving time information can be obtained through the local timer, for example, before the sending end sends the optical probe signal, the time stamp of the local timer is obtained as the sending time stamp and added to the optical probe signal After receiving the optical probe signal, the receiving end obtains the time stamp of the local timer as the receiving time stamp.
  • the time stamp of the local timer is obtained as the sending time stamp and added to the optical probe signal
  • the receiving end obtains the time stamp of the local timer as the receiving time stamp.
  • time offset reference value of the sending end and the receiving end can be determined during device configuration, and those skilled in the art are familiar with how to determine the time offset reference value between two routing devices, so details will not be repeated here.
  • step S540 in the embodiment shown in FIG. 5 is executed, the following steps are also included but not limited to:
  • Step S910 acquiring the service identifier of the transmission service
  • Step S920 establishing and saving the mapping relationship between the service identifier and the reference dispersion value.
  • the reference dispersion value may be pre-measured and stored at the master control node when the master route and the backup route are running normally, or it may be in the case of failure of the master route, in the case of the embodiment shown in Figure 5 After the steps are confirmed, save and select the specific method according to the actual situation.
  • the mapping relationship is established with the service identifier as the identification condition, so that the reference dispersion value can be quickly obtained after the main route corresponding to the transmission service fails, and the efficiency of the dispersion search is improved.
  • the light source 1010 may be an external light source, or an internal light source of the sending end 1020, which is not limited here.
  • the sending end 1020 includes a first signal amplifier 1021 , a signal conditioner 1022 , at least two second signal amplifiers 1023 , and a first local timer 1024 ; the receiving end 1030 includes a second local timer 1031 .
  • the network management system determines that protection switching is required, it will issue the recovery service ID to the master controllers of each node on the path.
  • delay 2 is the link delay of the optical probe signal with a wavelength of ⁇ 2
  • offset t 22 -t 21
  • offset It is the reference value of the time offset between the sending end and the receiving end.
  • the embodiment of the present application also provides a route switching method, which is applied to the sending end.
  • the sending end communicates with the receiving end.
  • the receiving end is configured with a primary route and a standby route for transmitting services, and the route switching method includes but is not limited to the following steps:
  • Step S1110 communicate service data with the receiving end through the standby route, wherein the dispersion compensation parameters applied by the receiving end are obtained by the receiving end performing dispersion search on the standby route within the dispersion search range, and the dispersion search range is determined by the main control node Sent to the receiving end when the operating state of the route changes to a faulty state.
  • the dispersion search range is determined by the master control node according to the reference dispersion value and preset search conditions, and the method of obtaining the reference dispersion value includes but is not limited to the following steps:
  • Step S1210 acquiring dispersion measurement information sent by the master control node
  • Step S1220 sending at least two optical probe signals to the receiving end, so that the master control node determines at least one transmission delay difference according to the transmission delay of the at least two optical probe signals, thereby determining at least one dispersion coefficient, and according to at least A dispersion coefficient determines the reference dispersion value, wherein the wavelengths of at least two optical probe signals are different from each other, the transmission delay difference is the difference between the transmission delays of the two optical probe signals, and the dispersion coefficient is based on the transmission delay difference, The wavelength difference and route length information of the two optical probe signals corresponding to the transmission time delay difference are obtained.
  • the embodiment of the present application also provides a routing switching method, which is applied to the receiving end.
  • the receiving end communicates with the sending end.
  • the receiving end is configured with a primary route and a standby route for transmitting services, and the route switching method includes but is not limited to the following steps:
  • Step S1310 acquiring the dispersion search range sent by the master control node, wherein the dispersion search range is sent by the master control node when it is determined that the operating state of the master route is changed to a fault state;
  • Step S1320 within the dispersion search range, perform a dispersion search for the standby route to obtain dispersion compensation parameters
  • Step S1330 apply the dispersion compensation parameter, and communicate the service data with the sending end through the backup route.
  • the dispersion search range is determined by the master control node according to the reference dispersion value and preset search conditions, and the method of obtaining the reference dispersion value includes but is not limited to the following steps:
  • Step S1410 acquiring at least two optical probe signals sent by the sending end, so that the master control node determines at least one transmission delay difference according to the transmission delays of at least two optical probe signals, so as to determine at least a dispersion coefficient, and determine the reference dispersion value according to the at least one dispersion coefficient, wherein the wavelengths of at least two optical probe signals are different from each other, and the transmission time delay difference is two optical probes
  • the difference value of the transmission delay of the signal, the dispersion coefficient is obtained according to the transmission delay difference, the wavelength difference of the two optical probe signals corresponding to the transmission delay difference, and the route length information, the The optical probe signal is sent by the sending end after obtaining the dispersion measurement information sent by the master control node.
  • the master control node 1500 includes: a memory 1510 , a processor 1520 , and a computer stored in the memory 1510 and capable of running on the processor 1520 program.
  • the processor 1520 and the memory 1510 may be connected through a bus or in other ways.
  • the non-transitory software programs and instructions required to implement the route switching method of the above-mentioned embodiment are stored in the memory 1510, and when executed by the processor 1520, the route switching method applied to the master control node 1500 in the above-mentioned embodiment is executed, for example , execute method step S110 in Fig. 1 described above, method step S210 to step S220 in Fig. 2, method step S310 to step S320 in Fig. 3, method step S410 in Fig. 4, method step S510 in Fig. 5 Go to step S540, method steps S710 to step S720 in FIG. 7 , method steps S810 to step S830 in FIG. 8 , method steps S910 to step S920 in FIG. 9 .
  • the routing device 1600 includes: a memory 1610 , a processor 1620 , and a computer program stored in the memory 1610 and operable on the processor 1620 .
  • the processor 1620 and the memory 1610 may be connected through a bus or in other ways.
  • the non-transitory software programs and instructions required to implement the routing switching method of the above-mentioned embodiment are stored in the memory 1610, and when executed by the processor 1620, the routing switching method applied to the routing device 1600 in the above-mentioned embodiment is executed, for example, Execute the method step S1110 in FIG. 11 described above, the method step S1210 to step S1220 in FIG. 12; or execute the method step S1310 to step S1330 in FIG. 13 and the method step S1410 in FIG. 14 described above.
  • the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • an embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by a processor or a controller, for example, by the above-mentioned Execution by a processor in the embodiment of the master control node can cause the above-mentioned processor to execute the route switching method applied to the master control node in the above embodiment, for example, execute the method step S110 in FIG. 1 described above, and the method in FIG. 2 Method step S210 to step S220, method step S310 to step S320 in Fig. 3, method step S410 in Fig. 4, method step S510 to step S540 in Fig. 5, method step S710 to step S720 in Fig. 7, Fig.
  • the route switching method of the master control node for example, executes the above method step S1110 in FIG. 11 and the method step S1210 to step S1220 in FIG. 12; or executes the method step S1310 to step S1330 in FIG. 13 described above, and Step S1410 of the method in 14.
  • Those skilled in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware and an appropriate combination thereof.
  • Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit .
  • a processor such as a central processing unit, digital signal processor, or microprocessor
  • Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media).
  • computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media.
  • Computer storage media include but not limited to Random Access Memory (Random Access Memory, RAM), Read-Only Memory (Read-Only Memory, ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash memory or other memory technologies, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and that can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .
  • the embodiment of the present application includes: if it is determined that the operating state of the main route has changed to a fault state, sending the dispersion search range to the receiving end, so that the receiving end and the sending end perform service data exchange through the standby route communication, wherein the dispersion compensation parameter applied by the receiving end is obtained by the receiving end performing dispersion search on the backup route within the dispersion search range.
  • the dispersion search range can be configured for the receiving end without in-band traversal, which effectively reduces the time spent on dispersion search, thereby improving the switching efficiency of the standby route and reducing the timeout risk of protection switching. Ensure quick business recovery.

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Abstract

一种路由切换方法、节点、路由设备、存储介质，路由切换方法包括：若确定主路由的运行状态变更为故障状态，向接收端发送色散搜索范围，以使接收端与发送端通过备路由进行业务数据的通信，其中，接收端应用的色散补偿参数由接收端在色散搜索范围内针对备路由进行色散搜索得到(S110)。

Description

路由切换方法、节点、路由设备、存储介质
相关申请的交叉引用
本申请基于申请号为202110975361.8、申请日为2021年08月24日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及但不限于光通信领域，尤其涉及一种路由切换方法、节点、路由设备、存储介质。
背景技术
自动交换光网络(Automatically Switched Optical Network，ASON)是在选路和信令控制下完成自动交换功能的新一代光网络，是光传送网(Optical Transport Network，OTN)技术的主要发展方向。为了提高ASON的可靠性，通常会在发送端和接收端之间设置主路由和备路由，组成保护倒换系统，在正常运行过程中通过主路由进行业务传输，在主路由发生故障后触发保护倒换，将业务传输切换到备路由进行，确保业务能够快速恢复。
若光纤传输链路中出现色散效应，并且光脉冲信号传输的速度到达一定的程度，会给ASON系统的运行造成不利的影响。为了解决这个问题，需要在接收端进行色散补偿。而色散的大小会受到路由的物理特性影响，因此不同的路由所适用的色散补偿参数不同。色散补偿参数需要通过色散搜索确定，但是目前的方法需要遍历带内全部的色散搜索范围，搜索的范围越大，耗费的时间越长。对于保护倒换系统，很可能因为色散搜索范围较大会导致保护倒换超时，影响业务的恢复。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供了一种路由切换方法、节点、路由设备、存储介质。
第一方面，本申请实施例提供了一种路由切换方法，应用于ASON的主控节点，所述主控节点分别与发送端与接收端通信连接，所述发送端与所述接收端之间配置有传输业务的主路由和备路由，所述路由切换方法包括：若确定所述主路由的运行状态变更为故障状态，向所述接收端发送色散搜索范围，以使所述接收端与所述发送端通过所述备路由进行业务数据的通信，其中，所述接收端应用的色散补偿参数由所述接收端在所述色散搜索范围内针对所述备路由进行色散搜索得到。
第二方面，本申请实施例提供了一种路由切换方法，应用于发送端，所述发送端与接收端通信连接，所述发送端和所述接收端分别与ASON的主控节点通信连接，所述发送端与所述接收端之间配置有传输业务的主路由和备路由，所述路由切换方法包括：与所述接收端通过所述备路由进行业务数据的通信，其中，所述接收端应用的色散补偿参数由所述接收端在色散搜索范围内针对所述备路由进行色散搜索得到，所述色散搜索范围由所述主控节点在确定所述主路由的运行状态变更为故障状态的情况下发送至所述接收端。
第三方面，本申请实施例提供了一种路由切换方法，应用于接收端，所述接收端与发送端通信连接，所述发送端和所述接收端分别与ASON的主控节点通信连接，所述发送端与所述 接收端之间配置有传输业务的主路由和备路由，所述路由切换方法包括：获取所述主控节点发送的色散搜索范围，其中，所述色散搜索范围由所述主控节点在确定所述主路由的运行状态变更为故障状态的情况下发送；在所述色散搜索范围内，针对所述备路由进行色散搜索，得到色散补偿参数；应用所述色散补偿参数，与所述发送端通过所述备路由进行业务数据的通信。
第四方面，本申请实施例提供了一种主控节点，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如第一方面所述的路由切换方法。
第五方面，本申请实施例提供了一种路由设备，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如第二方面所述的路由切换方法；或者，所述处理器执行所述计算机程序时实现如第三方面所述的路由切换方法。
本申请的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本申请而了解。本申请的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本申请技术方案的进一步理解，并且构成说明书的一部分，与本申请的实施例一起用于解释本申请的技术方案，并不构成对本发明技术方案的限制。
图1是本发明一个实施例提供的路由切换方法的流程图；
图2是本申请另一个实施例提供的确定主路由为故障状态的流程图；
图3是本申请另一个实施例提供的确定色散搜索范围的流程图；
图4是本申请另一个实施例提供的确定色散参考值的流程图；
图5是本申请另一个实施例提供的确定色散参考值的流程图；
图6是本申请另一个实施例提供的测量光探针信号传输时延的流程图；
图7是本申请另一个实施例提供的确定色散参考值的流程图；
图8是本申请另一个实施例提供的获取传输时延的流程图；
图9是本申请另一个实施例提供的保存参考色散值的流程图；
图10是本申请另一个实施例提供的发送端和接收端的结构示意图；
图11是本申请另一个实施例提供的路由切换方法的流程图；
图12是本申请另一个实施例提供的确定色散参考值的流程图；
图13是本申请另一个实施例提供的路由切换方法的流程图；
图14是本申请另一个实施例提供的确定色散参考值的流程图；
图15是本申请另一个实施例提供的主控节点的装置图；
图16是本申请另一个实施例提供的路由设备的装置图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要说明的是，虽然在装置示意图中进行了功能模块划分，在流程图中示出了逻辑顺序， 但是在某些情况下，可以以不同于装置中的模块划分，或流程图中的顺序执行所示出或描述的步骤。说明书、权利要求书或上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
本申请提供了一种路由切换方法、节点、路由设备、存储介质，路由切换方法包括：若确定所述主路由的运行状态变更为故障状态，向所述接收端发送色散搜索范围，以使所述接收端与所述发送端通过所述备路由进行业务数据的通信，其中，所述接收端应用的色散补偿参数由所述接收端在所述色散搜索范围内针对所述备路由进行色散搜索得到。根据本申请实施例提供的方案，能够为接收端配置色散搜索范围，无需进行带内遍历，有效减少了色散搜索耗费的时间，从而提高备路由的切换效率，减小了保护倒换的超时风险，确保业务快速恢复。
下面结合附图，对本申请实施例作进一步阐述。
如图1所示，图1是本申请一个实施例提供的一种路由切换方法，应用于ASON的主控节点，主控节点分别与发送端与接收端通信连接，发送端与接收端之间配置有传输业务的主路由和备路由，路由切换方法包括：
步骤S110，若确定主路由的运行状态变更为故障状态，向接收端发送色散搜索范围，以使接收端与发送端通过备路由进行业务数据的通信，其中，接收端应用的色散补偿参数由接收端在色散搜索范围内针对备路由进行色散搜索得到。
需要说明的是，对于OTN网络，路由的色散通常取决于光纤链路的物理特性，因此路由的光纤链路不变的情况下，色散也可以认为是相同的，基于此，通过主控节点向接收端下发色散搜索范围，能够使接收端在较小的范围内进行色散搜索，从而减少色散搜索所耗费的时间，提高路由切换的效率。
需要说明的是，色散搜索范围可以是预先设定，或者根据设定好的路由参数计算得到，当然，也可以在接收端进行色散搜索之前测量得到，本实施例对色散搜索范围的具体获取方式不多作限定。
需要说明的是，在接收端获取到色散搜索范围后，本领域技术人员熟知如何完成色散搜索和启动保护倒换流程，从而实现由主路由切换至备路由，本实施例对此不多作赘述。
另外，参照图2，ASON与网管系统通信连接，传输业务配置有业务标识，在一实施例中，图1所示实施例中的步骤S110还包括但不限于有以下步骤：
步骤S210，获取网管系统发送的故障信息，故障信息携带有故障业务标识；
步骤S220，若传输业务的业务标识与故障业务标识相匹配，确定传输业务的主路由的运行状态变更为故障状态。
需要说明的是，主路由的故障检测可以由网管系统的基于WDM/OTN的自动交换光网络(WDM/OTN Automatically Switched Optical Network，WASON，其中，波分复用(Wavelength Division Multiplexing，WDM))完成，若WASON检测到光纤链路出现故障，确定该光纤链路涉及的传输业务并获取业务标识，作为故障业务标识添加至告警信息下发至主控节点，从而触发主控节点下发色散搜索范围。
需要说明的是，故障业务标识可以是业务的业务标识，业务标识可以是任意形式，例如常见的业务身份标识号(Identity document，ID)，通过确定故障业务标识，能够确定该业务所对应的主控节点，为后续确定备路由提供判断依据。
需要说明的是，在主控节点获取到故障业务标识后，可以根据故障业务标识与本地配置好的业务标识进行匹配，确定需要进行保护倒换的传输业务，从而进行路由切换。
另外，参照图3，在一实施例中，在图1所示实施例中的步骤S110中，在向接收端发送色散搜索范围之前，方法还包括：
步骤S310，获取备路由的参考色散值；
步骤S320，根据参考色散值和预设的搜索条件确定色散搜索范围。
需要说明的是，参考色散值可以是预先保存在主控节点的数值，若传输业务的主路由出现故障后，可以根据传输业务的业务ID查询出对应的参考色散值；也可以是在主路由出现故障的情况下，针对备路由进行测量得到，本实施例对参考色散值的具体获取方式不多作限定。
需要说明的是，参考色散值可以是具体的色散的数值，在获取到参考色散值之后，可以根据预设的搜索条件确定色散搜索范围，例如，根据设定的阈值，将参考色散值加上阈值得到色散搜索范围的上限，将参考色散值减去阈值得到色散搜索范围的下限，将该上限和下限所组成的区间作为色散搜索范围；又如，也可以预先设定映射关系，通过参考色散值查询出对应的色散搜索范围；又如，预先设定好函数表达式，将参考色散值代入该函数表达式中，得到描述色散取值的曲线，将该曲线的取值范围作为色散搜索范围，本领域技术人员有动机根据实际需求调整搜索条件，在此不多作限定。
另外，参照图4，传输业务配置有业务标识，在一实施例中，图3所示实施例中的步骤S310还包括但不限于有以下步骤：
步骤S410，根据业务标识从预先保存的色散值中确定参考色散值。
需要说明的是，由于路由的光纤链路不变的情况下，色散值也可以认为是相同的，因此，可以预先针对每条备路由测量出参考色散值，使得在主路由出现故障的情况下能够直接获取参考色散值确定色散搜索范围，进一步提高了确定备路由色散补偿参数的效率。
另外，参照图5，在一实施例中，图3所示实施例中的步骤S310还包括但不限于有以下步骤：
步骤S510，向发送端发送色散测量信息，以使发送端向接收端发送至少两个光探针信号，其中，至少两个光探针信号的波长互不相同；
步骤S520，确定光探针信号的传输时延，并确定至少一个传输时延差，其中，传输时延差为两个光探针信号的传输时延的差值；
步骤S530，获取备路由的路由长度信息，确定至少一个色散系数，其中，色散系数根据传输时延差、传输时延差所对应的两个光探针信号的波长差和路由长度信息得到；
步骤S540，根据至少一个色散系数确定参考色散值。
本领域技术人员可知的是，光探针信号是可以模拟业务信号光的探针信号，并且光探针信号的波长和带宽等参数均可根据实际需求调整，因此通过光探针信号测量出的参考色散值，能够更好地模拟业务光信号实际传输情况，使得测量出的参考色散值具有较好的参考价值。
需要说明的是，向发送端发送的色散测量信息可以包括具体的测量需求，例如需要发送的光探针信号的个数，每个光探针信号的波长等，能够触发发送端向接收端发送至少两个光探针信号即可。可以理解的是，光探针信号的波长可以通过调整发送端的信号放大器和信号调整器实现，能够使得光探针信号的波长互不相同即可。
需要说明的是，如图6所示，图6所示的发送端和接收端设置有光传输单元(Optical  Transform Unit，OTU)，发送端通过OUT向接收端的OUT发送i个波长分布为(λ 1，λ 2···λ i)，其中i为大于或等于2的自然数，由于每个光探针信号在光纤传输的过程中会产生色散效应，因此根据接收端接收到的光探针信号。
需要说明的是，光探针信号的传输时延可以通过发送时间信息和接收时间信息确定，发送时间信息和接收时间信息的获取可以通过本地计时器的时间戳确定，也可以通过在光探针信号中调制光标签信息的形式得到，本领域技术人员熟知如何获取光探针信号的发送时间信息和接收时间，在此不多作限定，例如，如图6所示，波长为λ 1的光探针信号的发送时间为t 11，接收时间为t 12，则传输时延为delay 1+offset＝t 12-t 11，其中，delay为链路延迟，offset为发送端和接收端的时间偏差参考值，可以通过发送端和接收端的配置参数确定，同理，波长为λ 2的光探针信号的发送时间为t 21，接收时间为t 22，则传输时延为delay 2+offset＝t 22-t 21t，由于offset为常数，因此可以确定两个光探针信号的传输时延差△t 1＝delay 1-delay 2＝(t 12-t 11)-(t 22-t 21)。
需要说明的是，备路由的路由长度信息取决于光纤链路的长度，而光纤链路的长度通常是固定且可知的，因此可以预先在主控节点中设置好路由长度信息，从而在计算时直接获取使用。在获取到传输时延差后，色散系数可以通过如下公式计算得到：
Figure PCTCN2022111795-appb-000001
其中△t 1为上述得到的传输时延差，L为路由长度信息λ 1和λ 2分别为两个光探针信号的波长。
值得注意的是，参考上述描述，每个色散系数需要两个光探针信号的参数进行确定，但是并不一定需要两个连续发送的光探针信号，在确保两个光探针信号的波长不同的情况下，可以通过任意两个光探针信号计算出色散系数，在此不多作赘述。
需要说明的是，在获取到色散系数之后，可以直接应用色散系数作为参考色散值，若出于减小误差的需求，也可以计算得到多个色散系数之后，通过统计学的方式或者拟合曲线的方式估算出参考色散值，根据实际需求选取具体方式即可。
另外，参照图7，在一实施例中，图5所示实施例中的步骤S540还包括但不限于有以下步骤：
步骤S710，若色散系数的数量为一个，将色散系数确定为参考色散值；
或者，
步骤S720，若色散系数的数量为至少二个，根据至少二个色散系数拟合出色散曲线，并根据色散曲线估算出参考色散值。
需要说明的是，得到参考色散值之后，需要结合搜索条件得到色散搜索范围，因此参考色散值是用于确定色散搜索范围的数据基础，由于参考色散值是通过两个光探针信号的参数确定，可能存在一定的误差，可以根据误差允许的范围调整色散系数的数量，例如，允许的误差较大的情况下，可以通过两个光探针信号计算出一个色散系数，并直接确定为参考色散值即可；又如，在需要色散搜索范围的准确度较高的情况下，可以选取多组光探针信号得到多个色散系数，并拟合出色散曲线，从而估算出更加准确的参考色散值。
需要说明的是，在得到至少两个色散系数之后，本领域技术人员熟知如何根据多个数值进行拟合从而得到相关的曲线，例如以色散系数和波长建立坐标系，利用二者的数学关系得到色散曲线，并通过统计方法计算出对应的参考色散值，本实施例对此不多作限定。
另外，参照图8，在一实施例中，图5所示实施例中的步骤S520还包括但不限于有以下步骤：
步骤S810，获取光探针信号的发送时间信息和接收时间信息；
步骤S820，获取发送端与接收端的时间偏差参考值；
步骤S830，根据发送时间信息、接收时间信息和时间偏差参考值得到传输时延。
需要说明的是，发送时间信息和接受时间信息可以通过本地计时器获取，例如，在发送端发送光探针信号之前，获取本地计时器的时间戳作为发送时间戳，并添加至光探针信号中进行发送，接收端接收到光探针信号后，获取本地计时器的时间戳作为接收时间戳，本领域技术人员熟知如何获取信号收发时的时间戳，在此不多作赘述。
需要说明的是，发送端和接收端的时间偏差参考值可以在设备配置时确定，本领域技术人员熟知如何确定两个路由设备之间的时间偏差参考值，在此不多作赘述。
值得注意的是，根据发送时间信息、接收时间信息和时间偏差参考值得到传输时延的步骤可以参考图5所示实施例的描述，在此不重复赘述。
另外，参照图9，在一实施例中，在执行完图5所示实施例中的步骤S540之后，还包括但不限于有以下步骤：
步骤S910，获取传输业务的业务标识；
步骤S920，建立并保存业务标识与参考色散值的映射关系。
需要说明的是，参考色散值可以是在主路由和备路由正常运行的情况下预先测量并且保存在主控节点，也可以是主路由出现故障的情况下，在根据图5所示实施例的步骤确定之后保存，根据实际情况选取具体方式即可。
需要说明的是，在获取到色散参考之后，以业务标识为识别条件建立映射关系，能够在该传输业务对应的主路由出现故障后快速获取参考色散值，提高色散搜索的效率。
另外，为了更好地说明本申请实施例的技术方案，以下结合图10所示的结构，提出一个具体示例，其中，在图10所示的结构中，包括光源1010、发送端1020和接收端1030，其中光源1010可以是外部光源，也可以是发送端1020的内部光源，在此不多作限定。另外，发送端1020包括第一信号放大器1021，信号调整器1022、至少两个第二信号放大器1023、第一本地计时器1024；接收端1030包括第二本地计时器1031。
若网管系统判断出需要进行保护倒换时，将恢复业务ID下发给路径上的各节点主控，节点主控在判断需要进行色散搜索前，通过光源1010发出光信号，通过第一信号放大器1021进入信号调整器1022，通过信号调整器1022调整波长，再通过第二信号放大器1023发送发射波长为λ 1的光探针信号，并获取第一本地计时器1024发送的时间戳，发送时间记为t 11，同理发送波长为λ 2的光探针信号，并获取第一本地计时器1024发送的时间戳，发送时间记为t 12，接收端1030接收到波长为λ 1的光探针信号之后，获取第二本地计时器1031发送的时间戳，接收时间记为t 21，同理。接收端1030在接收到波长为λ 2的光探针信号之后，获取第二本地计时器1031发送的时间戳，接收时间记为t 22。
计算传输λ 1、λ 2的传输时延差：△t 1＝delay 1-delay 2＝(t 12-t 11)-(t 22-t 21)，其中，delay 1为波长为λ 1的光探针信号的链路延迟，满足delay 1+offset＝t 12-t 11，delay 2为波长为λ 2的光探针信号的链路延迟，满足delay 2+offset＝t 22-t 21，offset为发送端与接收端的时间偏差参考值。
获取备路由的路由长度信息L，计算出该组光探针信号所对应的色散系数：
Figure PCTCN2022111795-appb-000002
继续调整信号调整器1022，测试不同波长λ i下的色散系数D i，对得到的多个D i进行拟合，得 到色散曲线，并根据色散曲线估算出备路由的参考色散值。
将参考色散值和业务ID上传到网管，并记录保存，同时得到色散搜索范围后下发至接收端，通过接收端进行色散搜索实现色散补偿，并将传输业务的路由切换到备路由。
另外，参照图11，本申请实施例还提供了一种路由切换方法，应用于发送端，发送端与接收端通信连接，发送端和接收端分别与ASON的主控节点通信连接，发送端与接收端之间配置有传输业务的主路由和备路由，路由切换方法包括但不限于有以下步骤：
步骤S1110，与接收端通过备路由进行业务数据的通信，其中，接收端应用的色散补偿参数由接收端在色散搜索范围内针对备路由进行色散搜索得到，色散搜索范围由主控节点在确定主路由的运行状态变更为故障状态的情况下发送至接收端。
需要说明的是，本实施例的技术方案和原理可以参考图1所示的实施例，主要区别在于本实施例的执行主体为发送端，除此以外与图1所示实施例的原理类似，为了叙述简便，在此不多作赘述。
另外，参照图12，在一实施例中，色散搜索范围由主控节点根据参考色散值和预设的搜索条件确定，参考色散值的获取方式包括但不限于有以下步骤：
步骤S1210，获取主控节点发送的色散测量信息；
步骤S1220，向接收端发送至少两个光探针信号，以使主控节点根据至少两个光探针信号的传输时延确定至少一个传输时延差，从而确定至少一个色散系数，并根据至少一个色散系数确定参考色散值，其中，至少两个光探针信号的波长互不相同，传输时延差为两个光探针信号的传输时延的差值，色散系数根据传输时延差、传输时延差所对应的两个光探针信号的波长差和路由长度信息得到。
需要说明的是，本实施例的技术方案和原理可以参考图5所示的实施例，主要区别在于本实施例的执行主体为发送端，除此以外与图5所示实施例的原理类似，为了叙述简便，在此不多作赘述。
另外，参照图13，本申请实施例还提供了一种路由切换方法，应用于接收端，接收端与发送端通信连接，发送端和接收端分别与ASON的主控节点通信连接，发送端与接收端之间配置有传输业务的主路由和备路由，路由切换方法包括但不限于有以下步骤：
步骤S1310，获取主控节点发送的色散搜索范围，其中，色散搜索范围由主控节点在确定主路由的运行状态变更为故障状态的情况下发送；
步骤S1320，在色散搜索范围内，针对备路由进行色散搜索，得到色散补偿参数；
步骤S1330，应用色散补偿参数，与发送端通过备路由进行业务数据的通信。
需要说明的是，本实施例的技术方案和原理可以参考图1所示的实施例，主要区别在于本实施例的执行主体为接收端，除此以外与图1所示实施例的原理类似，为了叙述简便，在此不多作赘述。
另外，参照图14，在一实施例中，色散搜索范围由主控节点根据参考色散值和预设的搜索条件确定，参考色散值的获取方式包括但不限于有以下步骤：
步骤S1410，获取所述发送端发送的至少两个光探针信号，以使所述主控节点根据至少两个所述光探针信号的传输时延确定至少一个传输时延差，从而确定至少一个色散系数，并根据所述至少一个色散系数确定所述参考色散值，其中，至少两个所述光探针信号的波长互不相同，所述传输时延差为两个所述光探针信号的传输时延的差值，所述色散系数根据所述 传输时延差、所述传输时延差所对应的两个所述光探针信号的波长差和所述路由长度信息得到，所述光探针信号由发送端在获取到所述主控节点发送的色散测量信息的情况下发送。
需要说明的是，本实施例的技术方案和原理可以参考图5所示的实施例，主要区别在于本实施例的执行主体为接收端，除此以外与图5所示实施例的原理类似，为了叙述简便，在此不多作赘述。
另外，参照图15，本申请的一个实施例还提供了一种主控节点，该主控节点1500包括：存储器1510、处理器1520及存储在存储器1510上并可在处理器1520上运行的计算机程序。
处理器1520和存储器1510可以通过总线或者其他方式连接。
实现上述实施例的路由切换方法所需的非暂态软件程序以及指令存储在存储器1510中，当被处理器1520执行时，执行上述实施例中的应用于主控节点1500的路由切换方法，例如，执行以上描述的图1中的方法步骤S110、图2中的方法步骤S210至步骤S220、图3中的方法步骤S310至步骤S320、图4中的方法步骤S410、图5中的方法步骤S510至步骤S540、图7中的方法步骤S710至步骤S720、图8中的方法步骤S810至步骤S830、图9中的方法步骤S910至步骤S920。
另外，参照图16，本申请的一个实施例还提供了一种路由设备，该路由设备1600包括：存储器1610、处理器1620及存储在存储器1610上并可在处理器1620上运行的计算机程序。
处理器1620和存储器1610可以通过总线或者其他方式连接。
实现上述实施例的路由切换方法所需的非暂态软件程序以及指令存储在存储器1610中，当被处理器1620执行时，执行上述实施例中的应用于路由设备1600的路由切换方法，例如，执行以上描述的图11中的方法步骤S1110、图12中的方法步骤S1210至步骤S1220；或者，执行以上描述的图13中的方法步骤S1310至步骤S1330、和图14中的方法步骤S1410。
以上所描述的装置实施例仅仅是示意性的，其中作为分离部件说明的单元可以是或者也可以不是物理上分开的，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
此外，本申请的一个实施例还提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机可执行指令，该计算机可执行指令被一个处理器或控制器执行，例如，被上述主控节点实施例中的一个处理器执行，可使得上述处理器执行上述实施例中的应用于主控节点的路由切换方法，例如，执行以上描述的图1中的方法步骤S110、图2中的方法步骤S210至步骤S220、图3中的方法步骤S310至步骤S320、图4中的方法步骤S410、图5中的方法步骤S510至步骤S540、图7中的方法步骤S710至步骤S720、图8中的方法步骤S810至步骤S830、图9中的方法步骤S910至步骤S920；又如，被上述路由设备实施例中的一个处理器执行，可使得上述处理器执行上述实施例中的应用于主控节点的路由切换方法，例如，执行以上图11中的方法步骤S1110、图12中的方法步骤S1210至步骤S1220；或者，执行以上描述的图13中的方法步骤S1310至步骤S1330、和图14中的方法步骤S1410。本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统可以被实施为软件、固件、硬件及其适当的组合。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术 语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于随机存取存储器(Random Access Memory，RAM)、只读存储器(Read-Only Memory，ROM)、带电可擦可编程只读存储器(Electrically Erasable Programmable read only memory，EEPROM)、闪存或其他存储器技术、紧凑型光盘只读储存器(Compact Disc Read-Only Memory，CD-ROM)、数字多功能盘(Digital versatile disc，DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
本申请实施例包括：若确定所述主路由的运行状态变更为故障状态，向所述接收端发送色散搜索范围，以使所述接收端与所述发送端通过所述备路由进行业务数据的通信，其中，所述接收端应用的色散补偿参数由所述接收端在所述色散搜索范围内针对所述备路由进行色散搜索得到。根据本申请实施例提供的方案，能够为接收端配置色散搜索范围，无需进行带内遍历，有效减少了色散搜索耗费的时间，从而提高备路由的切换效率，减小了保护倒换的超时风险，确保业务快速恢复。
以上是对本申请的若干实施方式进行了具体说明，但本申请并不局限于上述实施方式，熟悉本领域的技术人员在不违背本申请精神的前提下还可作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (15)

  1. 一种路由切换方法，应用于自动交换光网络ASON的主控节点，所述主控节点分别与发送端与接收端通信连接，所述发送端与所述接收端之间配置有传输业务的主路由和备路由，所述路由切换方法包括：
    若确定所述主路由的运行状态变更为故障状态，向所述接收端发送色散搜索范围，以使所述接收端与所述发送端通过所述备路由进行业务数据的通信，其中，所述接收端应用的色散补偿参数由所述接收端在所述色散搜索范围内针对所述备路由进行色散搜索得到。
  2. 根据权利要求1所述的方法，其中，所述ASON与网管系统通信连接，所述传输业务配置有业务标识，所述主路由的运行状态变更为故障状态由以下方式确定：
    获取所述网管系统发送的故障信息，所述故障信息携带有故障业务标识；
    若所述传输业务的所述业务标识与所述故障业务标识相匹配，确定所述传输业务的所述主路由的运行状态变更为故障状态。
  3. 根据权利要求1所述的方法，其中，在所述向所述接收端发送色散搜索范围之前，所述方法还包括：
    获取所述备路由的参考色散值；
    根据所述参考色散值和预设的搜索条件确定所述色散搜索范围。
  4. 根据权利要求3所述的方法，其中，所述传输业务配置有业务标识，所述获取所述备路由的参考色散值，包括：
    根据所述业务标识从预先保存的色散值中确定所述参考色散值。
  5. 根据权利要求3所述的方法，其中，所述获取所述备路由的参考色散值，包括：
    向发送端发送色散测量信息，以使所述发送端向所述接收端发送至少两个光探针信号，其中，至少两个所述光探针信号的波长互不相同；
    确定所述光探针信号的传输时延，并确定至少一个传输时延差，其中，所述传输时延差为两个所述光探针信号的所述传输时延的差值；
    获取所述备路由的路由长度信息，确定至少一个色散系数，其中，所述色散系数根据所述传输时延差、所述传输时延差所对应的两个所述光探针信号的波长差和所述路由长度信息得到；
    根据所述至少一个色散系数确定所述参考色散值。
  6. 根据权利要求5所述的方法，其中，所述根据所述至少一个色散系数确定所述参考色散值，包括：
    若所述色散系数的数量为一个，将所述色散系数确定为所述参考色散值；
    或者，
    若所述色散系数的数量为至少二个，根据至少二个所述色散系数拟合出色散曲线，并根据所述色散曲线估算出所述参考色散值。
  7. 根据权利要求5所述的方法，其中，所述确定所述光探针信号的传输时延，包括：
    获取所述光探针信号的发送时间信息和接收时间信息；
    获取所述发送端与所述接收端的时间偏差参考值；
    根据所述发送时间信息、所述接收时间信息和所述时间偏差参考值得到所述传输时延。
  8. 根据权利要求5所述的方法，其中，在所述根据所述至少一个色散系数确定所述参考色散值之后，所述方法还包括：
    获取所述传输业务的业务标识；
    建立并保存所述业务标识与所述参考色散值的映射关系。
  9. 一种路由切换方法，应用于发送端，所述发送端与接收端通信连接，所述发送端和所述接收端分别与ASON的主控节点通信连接，所述发送端与所述接收端之间配置有传输业务的主路由和备路由，所述路由切换方法包括：
    与所述接收端通过所述备路由进行业务数据的通信，其中，所述接收端应用的色散补偿参数由所述接收端在色散搜索范围内针对所述备路由进行色散搜索得到，所述色散搜索范围由所述主控节点在确定所述主路由的运行状态变更为故障状态的情况下发送至所述接收端。
  10. 根据权利要求9所述的方法，其中，所述色散搜索范围由所述主控节点根据参考色散值和预设的搜索条件确定，所述参考色散值通过以下方式获取：
    获取主控节点发送的色散测量信息；
    向所述接收端发送至少两个光探针信号，以使所述主控节点根据至少两个所述光探针信号的传输时延确定至少一个传输时延差，从而确定至少一个色散系数，并根据所述至少一个色散系数确定所述参考色散值，其中，至少两个所述光探针信号的波长互不相同，所述传输时延差为两个所述光探针信号的传输时延的差值，所述色散系数根据所述传输时延差、所述传输时延差所对应的两个所述光探针信号的波长差和所述路由长度信息得到。
  11. 一种路由切换方法，应用于接收端，所述接收端与发送端通信连接，所述发送端和所述接收端分别与ASON的主控节点通信连接，所述发送端与所述接收端之间配置有传输业务的主路由和备路由，所述路由切换方法包括：
    获取所述主控节点发送的色散搜索范围，其中，所述色散搜索范围由所述主控节点在确定所述主路由的运行状态变更为故障状态的情况下发送；
    在所述色散搜索范围内，针对所述备路由进行色散搜索，得到色散补偿参数；
    应用所述色散补偿参数，与所述发送端通过所述备路由进行业务数据的通信。
  12. 根据权利要求11所述的方法，其中，所述色散搜索范围由所述主控节点根据参考色散值和预设的搜索条件确定，所述参考色散值通过以下方式获取：
    获取所述发送端发送的至少两个光探针信号，以使所述主控节点根据至少两个所述光探针信号的传输时延确定至少一个传输时延差，从而确定至少一个色散系数，并根据所述至少一个色散系数确定所述参考色散值，其中，至少两个所述光探针信号的波长互不相同，所述传输时延差为两个所述光探针信号的传输时延的差值，所述色散系数根据所述传输时延差、所述传输时延差所对应的两个所述光探针信号的波长差和所述路由长度信息得到，所述光探针信号由发送端在获取到所述主控节点发送的色散测量信息的情况下发送。
  13. 一种主控节点，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如权利要求1至8中任意一项所述的路由切换方法。
  14. 一种路由设备，包括：存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现如权利要求9至10中任意一项所述的路由切换方法；或者，所述处理器执行所述计算机程序时实现如权利要求11至12所述的 路由切换方法。
  15. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行如权利要求1至12中任意一项所述的路由切换方法。
PCT/CN2022/111795 2021-08-24 2022-08-11 路由切换方法、节点、路由设备、存储介质 Ceased WO2023024924A1 (zh)

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