WO2023024782A1 - Signal transmission method and system - Google Patents
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- the embodiments of the present application relate to the communication field, and in particular to a signal transmission method and system.
- optical channel carrying services in the OTN network because the adjustment flexibility of the service signal is limited, it is necessary to use additional optical signals (that is, test signals) to perform optical channel performance detection and parameter adjustment.
- additional optical signals that is, test signals
- test signals when parameters such as the bandwidth, power, and amplitude of the test signal change or the test signal is switched between different optical channels, it will cause frequent fluctuations in the power of the optical channel, which is mixed with the power fluctuations generated when the optical network fails. Together, the fault cannot be eliminated quickly, and this power fluctuation also affects the security of the running business.
- An embodiment of the present application provides a signal transmission method, which is applied to the transmission of a test signal in an OTN network.
- the signal transmission method includes: acquiring a power compensation signal, and connecting the power compensation signal to a transmission channel of the test signal Middle; monitor the current power of the target signal in the transmission channel, wherein the target signal includes at least a test signal; adjust the parameters of the power compensation signal according to the current power of the target signal so that the optical power of the transmission channel remains Stablize.
- a signal detection unit configured to monitor the current power of the target signal in the transmission channel and feed it back to the signal adjustment unit, wherein the target signal includes at least a test signal;
- FIG. 6 is the second optical path diagram of the signal transmission system provided by the embodiment of the present application.
- the signal transmission method provided by this application is applied to the transmission of the test signal in the OTN network, as shown in Figure 1, the signal transmission method includes:
- the entire transmission channel when monitoring the current power value of the test signal, at least includes: a service signal, a test signal and a power compensation signal.
- the wavelengths of the three are different. Therefore, the test signal in the transmission channel can be quickly determined through the wavelength, so as to determine the power value of the current test signal.
- monitoring the current power of the target signal in step 102 may monitor the feedback result in real time or periodically.
- the transmission channel includes multiple sub-channels, and the test signal is transmitted in one of the multiple sub-channels.
- the power compensation signal When connecting the power compensation signal into the transmission channel of the test signal, there are two access methods. One is: connecting the power compensation signal to the same sub-channel as the test signal for transmission. The other is: connecting the power compensation signal to a sub-channel different from that of the test signal for transmission.
- the transmission channel has a bandwidth of 50M, and there are two sub-channels, the bandwidth of sub-channel 1 and sub-channel 2 are both 25M, and the test signal is transmitted in sub-channel 1.
- the power compensation signal can share a sub-channel bandwidth with the test signal, or can occupy a sub-channel independently.
- the power compensation signal can share a sub-channel 1 with the test signal, or can be connected to the sub-channel 2 .
- the parameters of the power compensation signal can be adjusted to complement the power of the test signal, thereby ensuring the power stability of the entire transmission channel.
- step 201 a power compensation signal is obtained, and the power compensation signal is connected to a transmission channel of a test signal.
- Step 203 Calculate the power variation of the target signal according to the current power value of the target signal and the pre-recorded initial power value of the target signal.
- the target signal further includes a power compensation signal. That is to say, there are two methods for the signal detection unit 301 to monitor the current power of the target signal in the transmission channel. One is to monitor the current power of the test signal, and the other is to monitor the current total power of the test signal and the power compensation signal.
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Abstract
The embodiments of the present application relate to the field of communications. Provided are a signal transmission method and system, which are applied to the transmission of a test signal in an OTN. The signal transmission method comprises: acquiring a power compensation signal, and making the power compensation signal access a transmission channel for a test signal; monitoring the current power of a target signal in the transmission channel, wherein the target signal at least comprises the test signal; and adjusting a parameter of the power compensation signal according to the current power of the target signal, so as to keep the optical power of the transmission channel stable.
Description
相关申请的交叉引用Cross References to Related Applications
本申请基于申请号为“202110996594.6”、申请日为2021年08月27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以引入方式并入本申请。This application is based on the Chinese patent application with the application number "202110996594.6" and the filing date is August 27, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference. Apply.
本申请实施例涉及通信领域，特别涉及一种信号传输方法和系统。The embodiments of the present application relate to the communication field, and in particular to a signal transmission method and system.
光传送网(Optical Transport Network，OTN)技术，是承载光网络重要的组网技术，继承了同步数字体系(Synchronous Digital Hierarchy，SDH)网络和波分复用(Wavelength Division Multiplexing，WDM)网络的优势，其具有大容量和管控机制良好的优势。Optical Transport Network (OTN) technology is an important networking technology for carrying optical networks, which inherits the advantages of Synchronous Digital Hierarchy (SDH) network and Wavelength Division Multiplexing (WDM) network , which has the advantages of large capacity and good control mechanism.
OTN网络中对于承载业务的光通道，因为业务信号调节灵活性有限，需要借助额外的光信号(即测试信号)进行光通道性能检测、参数调优等工作。但是当测试信号的带宽、功率、幅值等参数发生变化或者测试信号在不同光通道之间的切换时，都会引起光通道的功率频繁波动，这和光网络在发生故障时产生的功率波动参杂一起，使得故障无法快速排除，同时这种功率波动也影响了正在运行的业务安全。For the optical channel carrying services in the OTN network, because the adjustment flexibility of the service signal is limited, it is necessary to use additional optical signals (that is, test signals) to perform optical channel performance detection and parameter adjustment. However, when parameters such as the bandwidth, power, and amplitude of the test signal change or the test signal is switched between different optical channels, it will cause frequent fluctuations in the power of the optical channel, which is mixed with the power fluctuations generated when the optical network fails. Together, the fault cannot be eliminated quickly, and this power fluctuation also affects the security of the running business.
发明内容Contents of the invention
本申请实施例提供了一种信号传输方法，应用于OTN网络中测试信号的传输，所述信号传输方法包括：获取功率补偿信号，将所述功率补偿信号接入到所述测试信号的传输通道中；监测所述传输通道中目标信号当前功率，其中，所述目标信号至少包括测试信号；根据所述目标信号的当前功率调节所述功率补偿信号的参数以使所述传输通道的光功率保持稳定。An embodiment of the present application provides a signal transmission method, which is applied to the transmission of a test signal in an OTN network. The signal transmission method includes: acquiring a power compensation signal, and connecting the power compensation signal to a transmission channel of the test signal Middle; monitor the current power of the target signal in the transmission channel, wherein the target signal includes at least a test signal; adjust the parameters of the power compensation signal according to the current power of the target signal so that the optical power of the transmission channel remains Stablize.
本申请实施例还提出了一种信号传输系统，应用于OTN网络中测试信号的传输，所述信号传输系统包括：The embodiment of the present application also proposes a signal transmission system, which is applied to the transmission of test signals in an OTN network, and the signal transmission system includes:
信号检测单元，用于监测传输通道中目标信号当前功率并反馈给信号调节单元，其中，所述目标信号至少包括测试信号；A signal detection unit, configured to monitor the current power of the target signal in the transmission channel and feed it back to the signal adjustment unit, wherein the target signal includes at least a test signal;
所述信号调节单元，用于获取功率补偿信号；根据所述信号检测单元反馈的目标信号当前功率调节所述功率补偿信号的参数以使所述传输通道的光功率保持稳定。The signal adjustment unit is configured to obtain a power compensation signal; adjust parameters of the power compensation signal according to the current power of the target signal fed back by the signal detection unit to keep the optical power of the transmission channel stable.
信号复用单元，用于将所述功率补偿信号接入到所述测试信号的传输通道中。The signal multiplexing unit is used for connecting the power compensation signal into the transmission channel of the test signal.
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定。One or more embodiments are exemplified by pictures in the accompanying drawings, and these exemplifications are not intended to limit the embodiments.
图1是本申请的实施例提供的信号传输方法的流程示意图；FIG. 1 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application;
图2是本申请的又一实施例提供的信号传输方法的流程示意图；FIG. 2 is a schematic flowchart of a signal transmission method provided by another embodiment of the present application;
图3是本申请的又一实施例提供的信号传输系统的结构示意图；FIG. 3 is a schematic structural diagram of a signal transmission system provided by another embodiment of the present application;
图4是本申请的又一实施例提供的信号传输系统的结构示意图；FIG. 4 is a schematic structural diagram of a signal transmission system provided by another embodiment of the present application;
图5是本申请的实施例提供的信号传输系统的光路图一；Fig. 5 is an optical path diagram 1 of the signal transmission system provided by the embodiment of the present application;
图6是本申请的实施例提供的信号传输系统的光路图二。FIG. 6 is the second optical path diagram of the signal transmission system provided by the embodiment of the present application.
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请的各实施例进行详细的阐述。然而，本领域的普通技术人员可以理解，在本申请各实施例中，为了使读者更好地理解本申请而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施例的种种变化和修改，也可以实现本申请所要求保护的技术方案。以下各个实施例的划分是为了描述方便，不应对本申请的具体实现方式构成任何限定，各个实施例在不矛盾的前提下可以相互结合相互引用。In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the application, many technical details are provided for readers to better understand the application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized. The division of the following embodiments is for the convenience of description, and should not constitute any limitation to the specific implementation of the present application, and the embodiments can be combined and referred to each other on the premise of no contradiction.
本申请实施例的主要目的在于提出一种信号传输方法和系统，保持传输通道功率稳定，有效降低功率频繁波动对在网业务的影响。The main purpose of the embodiments of the present application is to provide a signal transmission method and system, which can keep the transmission channel power stable and effectively reduce the impact of frequent power fluctuations on online services.
本申请提出的一种信号传输方法和系统，在测试信号的传输通道中引入功率补偿信号，根据传输通道当前光功率调节功率补偿信号的参数以使整个传输通道的功率维持稳定。本方法无论是测试信号的参数发生变化还是测试信号传输通道发生变化，将功率补偿信号和测试信号一并传输，在测试信号传输过程中实现功率补偿，保持传输通道功率稳定，有效降低了测试信号对在网业务的影响。A signal transmission method and system proposed in this application introduces a power compensation signal into the transmission channel of the test signal, and adjusts the parameters of the power compensation signal according to the current optical power of the transmission channel so that the power of the entire transmission channel remains stable. Whether the parameters of the test signal change or the test signal transmission channel changes, the method transmits the power compensation signal and the test signal together, realizes power compensation during the test signal transmission process, keeps the power of the transmission channel stable, and effectively reduces the test signal. Impact on online business.
本申请提供的信号传输方法，应用于OTN网络中测试信号的传输，如图1所示，信号传输方法包括：The signal transmission method provided by this application is applied to the transmission of the test signal in the OTN network, as shown in Figure 1, the signal transmission method includes:
步骤101，获取功率补偿信号，将功率补偿信号接入到测试信号的传输通道中。In step 101, a power compensation signal is obtained, and the power compensation signal is connected to a transmission channel of a test signal.
本实施例中，在OTN网络业务信号传输时，对于承载业务信号的光通道需要进行光通道性能检测、参数调优等工作。因为业务信号调节灵活性有限需要借助测试信号进行测试。而在测试时，无论是调节测试信号的幅值、带宽、功率等参数还是将测试信号在不同光通道之间进行切换，这些变化最终都体现为传输通道的功率波动。当然测试信号、功率补偿信号和业务信号三者的波长不能相同，测试信号和功率补偿信号的传输不能影响正常业务信号的传输。In this embodiment, when an OTN network service signal is transmitted, work such as optical channel performance detection and parameter tuning needs to be performed on the optical channel carrying the service signal. Because the flexibility of service signal adjustment is limited, it is necessary to test with the help of test signals. During the test, whether it is adjusting the amplitude, bandwidth, power and other parameters of the test signal or switching the test signal between different optical channels, these changes will eventually be reflected in the power fluctuation of the transmission channel. Of course, the wavelengths of the test signal, the power compensation signal and the service signal cannot be the same, and the transmission of the test signal and the power compensation signal cannot affect the transmission of the normal service signal.
需要说明的是，功率补偿信号的接入可以是任意时刻，功率补偿信号可以与测试信号同时接入传输通道，也可以功率补偿信号先于测试信号接入传输通道，还可以在测试信号接入后再接入功率补偿信号。本申请的信号传输方法关注的是测试信号传输过程中造成的功率变化，对测试信号接入时刻产生的功率变化不关注，或者说对测试信号接入通道那一时刻产生的功率波动认为是正常波动。当然，功率补偿信号接入时刻也会产生功率波动，对此也认为是正常波动。It should be noted that the power compensation signal can be connected at any time. The power compensation signal can be connected to the transmission channel at the same time as the test signal, or the power compensation signal can be connected to the transmission channel before the test signal. Then access the power compensation signal. The signal transmission method of this application focuses on the power change caused during the test signal transmission process, and does not pay attention to the power change generated at the moment when the test signal is connected, or considers the power fluctuation generated at the moment when the test signal is connected to the channel as normal fluctuation. Of course, power fluctuations will also occur at the time when the power compensation signal is connected, which is also considered to be normal fluctuations.
步骤102，监测传输通道中目标信号当前功率，其中，目标信号至少包括测试信号。 Step 102, monitor the current power of the target signal in the transmission channel, wherein the target signal includes at least a test signal.
本实施例中，监测测试信号的当前功率值时，整个传输通道中至少包括：业务信号、测试信号和功率补偿信号。三者的波长不同。因此，可以快速通过波长确定传输通道中的测试信号，以此来确定当前测试信号的功率值。另外，步骤102监测目标信号当前功率可以实时监测反馈结果，也可以周期性监测反馈结果。In this embodiment, when monitoring the current power value of the test signal, the entire transmission channel at least includes: a service signal, a test signal and a power compensation signal. The wavelengths of the three are different. Therefore, the test signal in the transmission channel can be quickly determined through the wavelength, so as to determine the power value of the current test signal. In addition, monitoring the current power of the target signal in step 102 may monitor the feedback result in real time or periodically.
步骤103，根据目标信号的当前功率调节功率补偿信号的参数以使传输通道的光功率保持稳定。 Step 103, adjust the parameters of the power compensation signal according to the current power of the target signal to keep the optical power of the transmission channel stable.
本实施例中，调节功率补偿信号的参数可以包括：功率补偿信号的功率值、功率补偿信号的光谱宽度、功率补偿信号的幅度。根据目标信号的当前功率调节功率补偿信号的参数时，可以单独只调节一个参数，也可以同时调节多个参数。比如：只调节功率补偿信号的光谱宽度，或同时调节功率值和光谱宽度。本领域技术人员可以理解的是，在幅度不变的情况下，将信号的光谱宽度调宽，可以增大光功率，将信号的光谱宽度调窄可以减小光功率。In this embodiment, adjusting the parameters of the power compensation signal may include: a power value of the power compensation signal, a spectral width of the power compensation signal, and an amplitude of the power compensation signal. When adjusting the parameters of the power compensation signal according to the current power of the target signal, only one parameter may be adjusted independently, or multiple parameters may be adjusted simultaneously. For example: only adjust the spectral width of the power compensation signal, or adjust the power value and spectral width at the same time. Those skilled in the art can understand that, under the condition that the amplitude remains unchanged, widening the spectral width of the signal can increase the optical power, and narrowing the spectral width of the signal can reduce the optical power.
另外，传输通道包括多个子通道，测试信号在多个子通道中的一个子通道中进行传输。将功率补偿信号接入到测试信号的传输通道中时，有两种接入方法。一种是：将功率补偿信号接入到与测试信号相同的子通道中传输。另一种是：将功率补偿信号接入到与测试信号不同的子通道中传输。比如：传输通道为50M带宽，有两个子通道，子通道1和子通道2带宽均为25M，其中测试信号在子通道1中进行传输。而功率补偿信号可以与测试信号共用一个子通道带宽，也可以独自占用一个子通道。即功率补偿信号可以与测试信号共用一个子通道1，也可以接入到子通道2中。但无论功率补偿信号是否与测试信号在一个子通道中，都可以通过调节功率补偿信号的参数实现与测试信号的功率互补，进而保证整个传输通道的功率稳定。In addition, the transmission channel includes multiple sub-channels, and the test signal is transmitted in one of the multiple sub-channels. When connecting the power compensation signal into the transmission channel of the test signal, there are two access methods. One is: connecting the power compensation signal to the same sub-channel as the test signal for transmission. The other is: connecting the power compensation signal to a sub-channel different from that of the test signal for transmission. For example: the transmission channel has a bandwidth of 50M, and there are two sub-channels, the bandwidth of sub-channel 1 and sub-channel 2 are both 25M, and the test signal is transmitted in sub-channel 1. The power compensation signal can share a sub-channel bandwidth with the test signal, or can occupy a sub-channel independently. That is, the power compensation signal can share a sub-channel 1 with the test signal, or can be connected to the sub-channel 2 . However, no matter whether the power compensation signal is in the same sub-channel as the test signal or not, the parameters of the power compensation signal can be adjusted to complement the power of the test signal, thereby ensuring the power stability of the entire transmission channel.
本申请提出的一种信号传输方法，在测试信号的传输通道中引入功率补偿信号，根据传输通道当前光功率调节功率补偿信号的参数以使整个传输通道的功率维持稳定。本方法无论是测试信号的参数发生变化还是测试信号传输通道发生变化，将功率补偿信号和测试信号一并传输，在测试信号传输过程中通过调节功率补偿信号的参数实现功率补偿，保持传输通道功率稳定，有效降低了测试信号对在网业务的影响。A signal transmission method proposed by the present application introduces a power compensation signal into the transmission channel of the test signal, and adjusts the parameters of the power compensation signal according to the current optical power of the transmission channel so that the power of the entire transmission channel remains stable. In this method, whether the parameters of the test signal change or the transmission channel of the test signal changes, the power compensation signal and the test signal are transmitted together, and the power compensation is realized by adjusting the parameters of the power compensation signal during the transmission of the test signal to maintain the power of the transmission channel. It is stable and effectively reduces the impact of test signals on online services.
本申请的另一实施例涉及一种信号传输方法，应用于OTN网络中测试信号的传输，如图2所示，信号传输方法包括：Another embodiment of the present application relates to a signal transmission method, which is applied to the transmission of test signals in an OTN network. As shown in FIG. 2, the signal transmission method includes:
步骤201，获取功率补偿信号，将功率补偿信号接入到测试信号的传输通道中。In step 201, a power compensation signal is obtained, and the power compensation signal is connected to a transmission channel of a test signal.
在本实施例中，步骤201的具体实施细节与步骤101基本相同，在此不做赘述。In this embodiment, the specific implementation details of step 201 are basically the same as those of step 101, and will not be repeated here.
步骤202，监测传输通道中目标信号当前功率，其中，目标信号至少包括测试信号。 Step 202, monitor the current power of the target signal in the transmission channel, wherein the target signal includes at least a test signal.
本实施例中，本实施例中目标信号还包括功率补偿信号。也就是说，监测传输通道中目标信号当前功率有两种方法。一种是，监测测试信号的当前功率，另一种是：监测测试信号和功率补偿信号的当前总功率。In this embodiment, the target signal in this embodiment further includes a power compensation signal. That is to say, there are two methods for monitoring the current power of the target signal in the transmission channel. One is to monitor the current power of the test signal, and the other is to monitor the current total power of the test signal and the power compensation signal.
步骤203，根据目标信号的当前功率值和预先记录的目标信号的初始功率值，计算目标信号功率变化量。Step 203: Calculate the power variation of the target signal according to the current power value of the target signal and the pre-recorded initial power value of the target signal.
本实施例中，步骤203可以根据测试信号当前功率值和预先记录的测试信号初始功率值，计算测试信号功率变化量。也可以根据测试信号和功率补偿信号当前总功率值、以及预先记录的测试信号和功率补偿信号初始总功率值，来计算测试信号和功率补偿信号的总功率变化量。In this embodiment, step 203 may calculate the power variation of the test signal according to the current power value of the test signal and the pre-recorded initial power value of the test signal. The total power variation of the test signal and the power compensation signal can also be calculated according to the current total power value of the test signal and the power compensation signal, and the pre-recorded initial total power value of the test signal and the power compensation signal.
需要说明的是，传输通道中的业务信号一般不会发生功率波动，其功率值一般保持稳定。因此，步骤202还可以监测传输通道中所有信号(测试信号、功率补偿信号和业务信号)的总功率，但是所有信号总功率变化量与测试信号和功率补偿信号总功率的变化量实质是一样的。It should be noted that the service signal in the transmission channel generally does not experience power fluctuations, and its power value generally remains stable. Therefore, step 202 can also monitor the total power of all signals (test signal, power compensation signal and service signal) in the transmission channel, but the variation of the total power of all signals is substantially the same as the variation of the total power of the test signal and power compensation signal .
另外，无论本申请的信号传输方法是实时监测目标信号功率还是周期性监测目标信号功率，都会保存上一时刻目标信号的功率值，以便后续计算目标信号功率变化量。In addition, regardless of whether the signal transmission method of the present application monitors the target signal power in real time or periodically, the power value of the target signal at the previous moment will be saved for subsequent calculation of the target signal power variation.
步骤204，根据目标信号功率变化量调节功率补偿信号的参数以使传输通道的光功率保持稳定。 Step 204, adjust the parameters of the power compensation signal according to the target signal power variation to keep the optical power of the transmission channel stable.
本实施例中，若计算出目标信号功率变化量为正值，说明测试信号的功率增大了，相应地，将功率补偿信号的功率调小。若计算出目标信号功率变化量为负值，说明测试信号的功率减小了，相应地，将功率补偿信号的功率调大。调节功率补偿信号的参数可以包括：功率补偿信号的功率值、功率补偿信号的光谱宽度、功率补偿信号的幅度。具体可以只调节其中一个参数，也可以调节多个参数。In this embodiment, if the calculated power variation of the target signal is a positive value, it means that the power of the test signal has increased, and accordingly, the power of the power compensation signal is adjusted down. If the calculated power variation of the target signal is a negative value, it means that the power of the test signal is reduced, and accordingly, the power of the power compensation signal is increased. The parameters for adjusting the power compensation signal may include: the power value of the power compensation signal, the spectral width of the power compensation signal, and the amplitude of the power compensation signal. Specifically, only one of the parameters may be adjusted, or multiple parameters may be adjusted.
比如：初始状态时，刚接入传输通道的测试信号功率为P1，功率补偿信号功率为Q1；测试信号调节过程中，根据测试信号检测结果得到接入传输通道的测试信号功率变化为P2，则功率补偿信号调节目标值为Q2＝Q1-(P2-P1)。For example: in the initial state, the power of the test signal just connected to the transmission channel is P1, and the power of the power compensation signal is Q1; during the test signal adjustment process, according to the test signal detection result, the power of the test signal connected to the transmission channel changes to P2, then The adjustment target value of the power compensation signal is Q2=Q1-(P2-P1).
需要说明的是，在调节功率补偿信号以使整个传输通道功率稳定时，本申请只要整个传输通道光功率保持在一个恒定值就可以，并不关注这个值具体是多少。It should be noted that when adjusting the power compensation signal to stabilize the power of the entire transmission channel, this application only needs to keep the optical power of the entire transmission channel at a constant value, and does not pay attention to the specific value of this value.
本申请提出的一种信号传输方法，在测试信号的传输通道中引入功率补偿信号，根据传输通道当前光功率调节功率补偿信号的参数以使整个传输通道的功率维持稳定。本方法无论是测试信号的参数发生变化还是测试信号传输通道发生变化，将功率补偿信号和测试信号一并传输，在测试信号传输过程中通过调节功率补偿信号的参数实现功率补偿，保持整个传输通道功率稳定，有效降低了测试信号对在网业务的影响。A signal transmission method proposed by the present application introduces a power compensation signal into the transmission channel of the test signal, and adjusts the parameters of the power compensation signal according to the current optical power of the transmission channel so that the power of the entire transmission channel remains stable. In this method, whether the parameters of the test signal change or the transmission channel of the test signal changes, the power compensation signal and the test signal are transmitted together, and the power compensation is realized by adjusting the parameters of the power compensation signal during the transmission of the test signal, so as to keep the entire transmission channel The power is stable, which effectively reduces the impact of test signals on online services.
本申请的另一实施例涉及一种信号传输系统，应用于OTN网络中测试信号的传输，如图3所示，信号传输系统包括：Another embodiment of the present application relates to a signal transmission system, which is applied to the transmission of test signals in an OTN network. As shown in FIG. 3, the signal transmission system includes:
信号检测单元301，用于监测传输通道中目标信号当前功率并反馈给信号调节单元，其中，所述目标信号至少包括测试信号；A signal detection unit 301, configured to monitor the current power of the target signal in the transmission channel and feed it back to the signal adjustment unit, wherein the target signal includes at least a test signal;
所述信号调节单元302，用于获取功率补偿信号；根据所述信号检测单元301反馈的目标信号当前功率调节所述功率补偿信号的参数以使所述传输通道的光功率保持稳定。The signal adjustment unit 302 is configured to obtain a power compensation signal; adjust parameters of the power compensation signal according to the current power of the target signal fed back by the signal detection unit 301 to keep the optical power of the transmission channel stable.
信号复用单元303，用于将所述功率补偿信号接入到所述测试信号的传输通道中。The signal multiplexing unit 303 is configured to connect the power compensation signal into the transmission channel of the test signal.
本实施例中，信号检测单元301可以是光性能检测模块(Optical Performance Monitor，OPM),可以在线监测传输通道光功率、中心波长及光信噪比等指标。信号调节单元302可以是可调信号衰减器，比如：波长选择开关(Wavelength Selective Switch，WSS)。信号复用单元303可以是合波器OMU(Optical Multiplex Unit)。信号检测单元、信号调节单元和信号复用单元之间构成了一个反馈环。In this embodiment, the signal detection unit 301 can be an optical performance detection module (Optical Performance Monitor, OPM), which can monitor indicators such as transmission channel optical power, central wavelength, and optical signal-to-noise ratio online. The signal conditioning unit 302 may be an adjustable signal attenuator, such as a wavelength selective switch (Wavelength Selective Switch, WSS). The signal multiplexing unit 303 may be an optical multiplexer OMU (Optical Multiplex Unit). A feedback loop is formed among the signal detection unit, the signal adjustment unit and the signal multiplexing unit.
在本实施例中，信号检测单元301监测测试信号的当前功率值时，整个传输通道中至少包括：业务信号、测试信号和功率补偿信号。三者的波长不同。因此，可以快速通过波长确定传输通道中的测试信号，以此来确定当前测试信号的功率值。监测目标信号当前功率可以实时监测反馈结果，也可以周期性监测反馈结果。In this embodiment, when the signal detection unit 301 monitors the current power value of the test signal, the entire transmission channel at least includes: a service signal, a test signal and a power compensation signal. The wavelengths of the three are different. Therefore, the test signal in the transmission channel can be quickly determined through the wavelength, so as to determine the power value of the current test signal. Monitoring the current power of the target signal can monitor the feedback results in real time or periodically.
在本实施例中，传输通道包括多个子通道，测试信号在多个子通道中的一个子通道中进行传输。信号复用单元303将功率补偿信号接入到测试信号的传输通道中时，有两种接入方法。一种是：将功率补偿信号接入到与测试信号相同的子通道中传输。另一种是：将功率补 偿信号接入到与测试信号不同的子通道中传输。In this embodiment, the transmission channel includes multiple sub-channels, and the test signal is transmitted in one of the multiple sub-channels. When the signal multiplexing unit 303 inserts the power compensation signal into the transmission channel of the test signal, there are two access methods. One is: connecting the power compensation signal to the same sub-channel as the test signal for transmission. The other is: the power compensation signal is connected to a different sub-channel from the test signal for transmission.
比如：传输通道为50M带宽，有两个子通道，子通道1和子通道2带宽均为25M，其中测试信号在子通道1中进行传输。而功率补偿信号可以与测试信号共用一个子通道带宽，也可以独自占用一个子通道。即功率补偿信号可以与测试信号共用一个子通道1，也可以接入到子通道2中。但无论功率补偿信号是否与测试信号在一个子通道中，都可以通过调节功率补偿信号的参数实现与测试信号的功率互补，进而保证整个传输通道的功率稳定。For example: the transmission channel has a bandwidth of 50M, and there are two sub-channels, the bandwidth of sub-channel 1 and sub-channel 2 are both 25M, and the test signal is transmitted in sub-channel 1. The power compensation signal can share a sub-channel bandwidth with the test signal, or can occupy a sub-channel independently. That is, the power compensation signal can share a sub-channel 1 with the test signal, or can be connected to the sub-channel 2 . However, no matter whether the power compensation signal is in the same sub-channel as the test signal or not, the parameters of the power compensation signal can be adjusted to complement the power of the test signal, thereby ensuring the power stability of the entire transmission channel.
另外，测试信号、功率补偿信号和业务信号三者的波长不能相同，测试信号和功率补偿信号的传输不能影响正常业务信号的传输。功率补偿信号的接入可以是任意时刻，功率补偿信号可以与测试信号同时接入传输通道，也可以功率补偿信号先于测试信号接入传输通道，还可以在测试信号接入后再接入功率补偿信号。本申请的信号传输系统关注的是测试信号传输过程中造成的功率变化，对测试信号接入时刻产生的功率变化不关注，或者说对测试信号接入通道那一时刻产生的功率波动认为是正常波动。当然，功率补偿信号接入时刻也会产生功率波动，对此也认为是正常波动。In addition, the wavelengths of the test signal, the power compensation signal and the service signal cannot be the same, and the transmission of the test signal and the power compensation signal cannot affect the transmission of the normal service signal. The power compensation signal can be connected at any time. The power compensation signal can be connected to the transmission channel at the same time as the test signal, or the power compensation signal can be connected to the transmission channel before the test signal, or the power compensation signal can be connected to the power after the test signal is connected. compensation signal. The signal transmission system of this application focuses on the power change caused during the test signal transmission process, and does not pay attention to the power change generated at the moment when the test signal is connected, or considers the power fluctuation generated at the moment when the test signal is connected to the channel as normal fluctuation. Of course, power fluctuations will also occur at the time when the power compensation signal is connected, which is also considered to be normal fluctuations.
本实施例中，信号调节单元302用于根据目标信号的当前功率值和预先记录的目标信号的初始功率值，计算目标信号功率变化量；根据目标信号功率变化量调节功率补偿信号的参数以使传输通道的光功率保持稳定。In this embodiment, the signal adjustment unit 302 is used to calculate the target signal power change amount according to the current power value of the target signal and the pre-recorded initial power value of the target signal; adjust the parameters of the power compensation signal according to the target signal power change amount so that The optical power of the transmission channel remains stable.
需要说明的是，信号调节单元302包括计算控制单元，其可以直接根据信号检测单元301检测的目标信号当前功率值和预先记录的目标信号初始功率值，计算目标信号功率变化量进而进行调节。信号检测单元301还可以将检测的目标信号当前功率值上报网络管理系统，网络管理系统根据预先保存的目标信号初始功率值计算下发控制调节命令给信号调节单元302。It should be noted that the signal adjustment unit 302 includes a calculation control unit, which can directly calculate the target signal power change amount and then adjust according to the current target signal power value detected by the signal detection unit 301 and the pre-recorded target signal initial power value. The signal detection unit 301 can also report the detected current power value of the target signal to the network management system, and the network management system calculates and sends control adjustment commands to the signal adjustment unit 302 according to the pre-stored initial power value of the target signal.
另外，调节功率补偿信号的参数可以包括：功率补偿信号的功率值、功率补偿信号的光谱宽度、功率补偿信号的幅度。根据目标信号的当前功率调节功率补偿信号的参数时，可以单独只调节一个参数，也可以同时调节多个参数。比如：只调节功率补偿信号的光谱宽度，或同时调节功率值和光谱宽度。本领域技术人员可以理解的是，在幅度不变的情况下，将信号的光谱宽度调宽，可以增大光功率，将信号的光谱宽度调窄可以减小光功率。In addition, adjusting the parameters of the power compensation signal may include: the power value of the power compensation signal, the spectral width of the power compensation signal, and the amplitude of the power compensation signal. When adjusting the parameters of the power compensation signal according to the current power of the target signal, only one parameter may be adjusted independently, or multiple parameters may be adjusted simultaneously. For example: only adjust the spectral width of the power compensation signal, or adjust the power value and spectral width at the same time. Those skilled in the art can understand that, under the condition that the amplitude remains unchanged, widening the spectral width of the signal can increase the optical power, and narrowing the spectral width of the signal can reduce the optical power.
在本实施例中，目标信号还包括功率补偿信号。也就是说，信号检测单元301监测传输通道中目标信号当前功率有两种方法。一种是，监测测试信号的当前功率，另一种是：监测测试信号和功率补偿信号的当前总功率。In this embodiment, the target signal further includes a power compensation signal. That is to say, there are two methods for the signal detection unit 301 to monitor the current power of the target signal in the transmission channel. One is to monitor the current power of the test signal, and the other is to monitor the current total power of the test signal and the power compensation signal.
相应地，信号调节单元302可以根据测试信号当前功率值和预先记录的测试信号初始功率值，计算测试信号功率变化量。也可以根据测试信号和功率补偿信号当前总功率值、以及预先记录的测试信号和功率补偿信号初始总功率值，来计算测试信号和功率补偿信号的总功率变化量。需要说明的是，传输通道中的业务信号一般不会发生功率波动，其功率值一般保持稳定。因此，信号检测单元301还可以监测传输通道中所有信号(测试信号、功率补偿信号和业务信号)的总功率，但是所有信号总功率变化量与测试信号和功率补偿信号总功率的变化量实质是一样的。Correspondingly, the signal adjusting unit 302 may calculate the power variation of the test signal according to the current power value of the test signal and the pre-recorded initial power value of the test signal. The total power variation of the test signal and the power compensation signal can also be calculated according to the current total power value of the test signal and the power compensation signal, and the pre-recorded initial total power value of the test signal and the power compensation signal. It should be noted that the service signal in the transmission channel generally does not experience power fluctuations, and its power value generally remains stable. Therefore, the signal detection unit 301 can also monitor the total power of all signals (test signal, power compensation signal and service signal) in the transmission channel, but the variation of the total power of all signals and the total power of the test signal and power compensation signal are essentially the same the same.
进一步地，如图4所示，信号传输系统还可以包括：Further, as shown in Figure 4, the signal transmission system may also include:
信号产生单元304，用于产生功率补偿信号，其中，功率补偿信号的波长与所述测试信号的波长不相同；a signal generating unit 304, configured to generate a power compensation signal, wherein the wavelength of the power compensation signal is different from the wavelength of the test signal;
信号路由单元305，用于将功率补偿信号路由传输至所述信号检测单元。The signal routing unit 305 is configured to route and transmit the power compensation signal to the signal detection unit.
本实施例中，信号产生单元303可以是光放大器(Optical Amplifier，OA)或单波长可调谐激光器。信号路由单元304可以是波长选择开关。In this embodiment, the signal generating unit 303 may be an optical amplifier (Optical Amplifier, OA) or a single-wavelength tunable laser. Signal routing unit 304 may be a wavelength selective switch.
在一个实施例中，如图5所示，光放大器OA1和OA2作为信号产生单元，波长选择开关WSS1作为信号调节单元，OPM作为信号检测单元，合波器OMU作为信号复用单元。通过OA1自身产生的放大器自发辐射噪声ASE(Amplifier Spontaneousemission Noise)形成宽谱信号光，经OA2放大到合适光功率后作为功率补偿信号进入WSS1，然后通过OMU将功率补偿信号接入到测试信号的传输通道中，图5中其余的器件和连接方式是OTN网络中业务信号传输的常用架构。需要说明的是，OA4中包括分光器，分光器用于从光放大器中分出一部分光供OPM进行检测。In one embodiment, as shown in FIG. 5 , the optical amplifiers OA1 and OA2 are used as signal generating units, the wavelength selective switch WSS1 is used as a signal conditioning unit, the OPM is used as a signal detection unit, and the multiplexer OMU is used as a signal multiplexing unit. The amplifier spontaneous emission noise ASE (Amplifier Spontaneousemission Noise) generated by OA1 itself forms a wide-spectrum signal light, which is amplified by OA2 to a suitable optical power and enters WSS1 as a power compensation signal, and then the power compensation signal is connected to the transmission of the test signal through the OMU In the channel, the remaining devices and connection modes in Figure 5 are common architectures for service signal transmission in the OTN network. It should be noted that the OA4 includes an optical splitter, and the optical splitter is used to split a part of light from the optical amplifier for detection by the OPM.
在另一个实施例中，如图6所示，由于整个传输系统中有两个业务信号，其分别在两个方向上传输，因此，产生了两个功率补偿信号，其波长分别为λ1和λ2。需要说明的是，由于WSS具有灵活的波长选择功能和衰减调节功能，因此WSS1既可以作为信号调节单元去调节功率补偿信号，又可以作为信号产生单元的一部分，即OA1的ASE噪声形成宽谱信号光，经OA2放大到合适的光功率后进入WSS1，宽谱信号光经WSS1调节输出两个波长分别为λ1和λ2的功率补偿信号。In another embodiment, as shown in FIG. 6, since there are two service signals in the entire transmission system, which are transmitted in two directions respectively, two power compensation signals are generated, and their wavelengths are λ1 and λ2 respectively . It should be noted that since WSS has flexible wavelength selection and attenuation adjustment functions, WSS1 can be used as a signal adjustment unit to adjust the power compensation signal, and can also be used as a part of the signal generation unit, that is, the ASE noise of OA1 forms a wide-spectrum signal The light is amplified by OA2 to a suitable optical power and then enters WSS1, and the wide-spectrum signal light is adjusted by WSS1 to output two power compensation signals with wavelengths λ1 and λ2 respectively.
WSS2作为信号路由单元将波长为λ1的功率补偿信号路由至方向1，将波长为λ2的功率补偿信号路由至方向2。当测试信号由方向1切换至方向2时，方向1的接收站点信号检测单元OPM 1检测到动态信号的积分功率减小，为了使方向1传输通道中的信号总功率保持一致，WSS1根据OPM 1检测结果直接同步调节波长为λ1的功率补偿信号的衰减量，提高功率补偿信号的积分功率。从而实现动态信号传输过程中方向1通道功率的稳定。同时当方向2的接收站点信号检测单元OPM 2检测到有测试信号接入进来，且动态信号积分功率增大，为了使方向2传输通道中的信号总功率保持一致，WSS1根据OPM 2检测结果直接同步调节波长为λ2的功率补偿信号的衰减量，减小功率补偿信号的积分功率。从而实现测试信号传输过程中方向2通道功率的稳定。As a signal routing unit, WSS2 routes the power compensation signal with wavelength λ1 to direction 1, and routes the power compensation signal with wavelength λ2 to direction 2. When the test signal is switched from direction 1 to direction 2, the signal detection unit OPM 1 of the receiving station in direction 1 detects that the integrated power of the dynamic signal decreases. In order to keep the total signal power in the transmission channel of direction 1 consistent, WSS1 according to OPM 1 The detection result directly and synchronously adjusts the attenuation of the power compensation signal with a wavelength of λ1, and increases the integral power of the power compensation signal. In this way, the stability of the power of the direction 1 channel in the process of dynamic signal transmission is realized. At the same time, when the signal detection unit OPM 2 of the receiving station in the direction 2 detects that there is a test signal coming in, and the integrated power of the dynamic signal increases, in order to keep the total signal power in the transmission channel in the direction 2 consistent, WSS1 directly according to the detection result of OPM 2 Synchronously adjust the attenuation of the power compensation signal with a wavelength of λ2 to reduce the integral power of the power compensation signal. In this way, the stability of the power of the 2-way channel in the test signal transmission process is realized.
值得一提的是，为了突出本申请的创新部分，本实施例中并没有将与解决本申请所提出的技术问题关系不太密切的单元引入，但这并不表明本实施例中不存在其它的单元。It is worth mentioning that, in order to highlight the innovative part of this application, in this embodiment, units that are not closely related to solving the technical problems proposed by this application are not introduced, but this does not mean that there are no other elements in this embodiment. unit.
此外，应当理解的是，上面各种方法的步骤划分，只是为了描述清楚，实现时可以合并为一个步骤或者对某些步骤进行拆分，分解为多个步骤，只要包括相同的逻辑关系，都在本专利的保护范围内；对流程中添加无关紧要的修改或者引入无关紧要的设计，但不改变其流程的核心设计都在该专利的保护范围内。In addition, it should be understood that the division of steps in the above methods is only for clarity of description, and may be combined into one step or split into multiple steps during implementation. As long as the same logical relationship is included, all Within the scope of protection of this patent; adding insignificant modifications to the process or introducing insignificant designs without changing the core design of the process are all within the scope of protection of this patent.
不难发现，本实施例为与信号传输方法实施例相对应的系统实施例，本实施例可与上述实施例互相配合实施。上述实施例中提到的相关技术细节在本实施例中依然有效，为了减少重复，这里不再赘述。相应地，本实施例中提到的相关技术细节也可应用在上述方法实施例中。It is not difficult to find that this embodiment is a system embodiment corresponding to the embodiment of the signal transmission method, and this embodiment can be implemented in cooperation with the foregoing embodiments. The relevant technical details mentioned in the foregoing embodiments are still valid in this embodiment, and will not be repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to the above method embodiments.
本领域的普通技术人员可以理解，上述各实施例是实现本申请的具体实施例，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本申请的精神和范围。Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present application, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present application. scope.
Claims (9)
- 一种信号传输方法，应用于OTN网络中测试信号的传输，所述信号传输方法包括：A kind of signal transmission method, is applied to the transmission of test signal in OTN network, and described signal transmission method comprises:获取功率补偿信号，将所述功率补偿信号接入到所述测试信号的传输通道中；Acquiring a power compensation signal, and connecting the power compensation signal to the transmission channel of the test signal;监测所述传输通道中目标信号当前功率，其中，所述目标信号至少包括测试信号；monitoring the current power of the target signal in the transmission channel, wherein the target signal includes at least a test signal;根据所述目标信号的当前功率调节所述功率补偿信号的参数以使所述传输通道的光功率保持稳定。The parameters of the power compensation signal are adjusted according to the current power of the target signal to keep the optical power of the transmission channel stable.
- 根据权利要求1所述的信号传输方法，其中，所述功率补偿信号的波长与所述动态信号的波长不相同。The signal transmission method according to claim 1, wherein the wavelength of the power compensation signal is different from that of the dynamic signal.
- 根据权利要求1或2所述的信号传输方法，其中，所述传输通道包括多个子通道，所述测试信号在所述多个子通道中的一个子通道中进行传输；The signal transmission method according to claim 1 or 2, wherein the transmission channel includes a plurality of sub-channels, and the test signal is transmitted in one sub-channel of the plurality of sub-channels;所述将所述功率补偿信号接入到所述测试信号的传输通道中，包括：The accessing the power compensation signal to the transmission channel of the test signal includes:将所述功率补偿信号接入到与所述测试信号相同的子通道中传输；或者，Connecting the power compensation signal to the same sub-channel as the test signal for transmission; or,将所述功率补偿信号接入到与所述测试信号不同的子通道中传输。The power compensation signal is connected to a sub-channel different from the test signal for transmission.
- 根据权利要求1-3中任一项所述的信号传输方法，其中，所述根据所述目标信号的当前功率调节所述功率补偿信号的参数以使所述传输通道的光功率保持稳定，包括：The signal transmission method according to any one of claims 1-3, wherein the adjusting the parameters of the power compensation signal according to the current power of the target signal to keep the optical power of the transmission channel stable includes :根据所述目标信号的当前功率值和预先记录的所述目标信号的初始功率值，计算所述目标信号功率变化量；calculating the power variation of the target signal according to the current power value of the target signal and the pre-recorded initial power value of the target signal;根据所述目标信号功率变化量调节所述功率补偿信号的参数以使所述传输通道的光功率保持稳定。The parameter of the power compensation signal is adjusted according to the variation amount of the target signal power so as to keep the optical power of the transmission channel stable.
- 根据权利要求1-4中任一项所述的信号传输方法，其中，所述目标信号还包括：所述功率补偿信号。The signal transmission method according to any one of claims 1-4, wherein the target signal further includes: the power compensation signal.
- 根据权利要求1-4中任一项所述的信号传输方法，其中，所述功率补偿信号的参数，包括：所述功率补偿信号的功率值、所述功率补偿信号的光谱宽度。The signal transmission method according to any one of claims 1-4, wherein the parameters of the power compensation signal include: a power value of the power compensation signal, and a spectral width of the power compensation signal.
- 一种信号传输系统，应用于OTN网络中测试信号的传输，所述信号传输系统包括：A signal transmission system, applied to the transmission of a test signal in an OTN network, said signal transmission system comprising:信号检测单元，用于监测传输通道中目标信号当前功率并反馈给信号调节单元，其中，所述目标信号至少包括测试信号；A signal detection unit, configured to monitor the current power of the target signal in the transmission channel and feed it back to the signal adjustment unit, wherein the target signal includes at least a test signal;所述信号调节单元，用于获取功率补偿信号；根据所述信号检测单元反馈的目标信号当前功率调节所述功率补偿信号的参数以使所述传输通道的光功率保持稳定；The signal adjustment unit is configured to obtain a power compensation signal; adjust the parameters of the power compensation signal according to the current power of the target signal fed back by the signal detection unit to keep the optical power of the transmission channel stable;信号复用单元，用于将所述功率补偿信号接入到所述测试信号的传输通道中。The signal multiplexing unit is used for connecting the power compensation signal into the transmission channel of the test signal.
- 根据权利要求7所述的信号传输系统，其中，还包括：The signal transmission system according to claim 7, further comprising:信号产生单元，用于产生所述功率补偿信号，其中，所述功率补偿信号的波长与所述测试信号的波长不相同；a signal generating unit, configured to generate the power compensation signal, wherein the wavelength of the power compensation signal is different from the wavelength of the test signal;信号路由单元，用于将所述功率补偿信号路由传输至所述信号检测单元。A signal routing unit, configured to route and transmit the power compensation signal to the signal detection unit.
- 根据权利要求7或8所述的信号传输系统，其中，所述信号调节单元为可调衰减器件；信号产生单元为光放大器或单波长可调谐激光器。The signal transmission system according to claim 7 or 8, wherein the signal adjustment unit is an adjustable attenuation device; the signal generation unit is an optical amplifier or a single-wavelength tunable laser.
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