WO2012100526A1 - Signal data model matching method, system and framer - Google Patents

Signal data model matching method, system and framer Download PDF

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Publication number
WO2012100526A1
WO2012100526A1 PCT/CN2011/078652 CN2011078652W WO2012100526A1 WO 2012100526 A1 WO2012100526 A1 WO 2012100526A1 CN 2011078652 W CN2011078652 W CN 2011078652W WO 2012100526 A1 WO2012100526 A1 WO 2012100526A1
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Prior art keywords
channel
data
frame header
framer
signal
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PCT/CN2011/078652
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French (fr)
Chinese (zh)
Inventor
康凯
沈百林
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中兴通讯股份有限公司
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Publication of WO2012100526A1 publication Critical patent/WO2012100526A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13216—Code signals, frame structure

Definitions

  • the present invention relates to the field of optical network technologies, and in particular, to a signal data pattern matching method, system and framer suitable for a 100G optical transmission system. Background technique
  • the ITU-T International Telecommunication Union-TELECOMMU ICATION
  • OTU4 Optical Channel Transport Unit
  • the optical signal rate of the OTU4 on the line side is about 112Gb/s. Since the electrical device cannot handle such a high rate, it is generally required to use a combination of technologies such as multi-wavelength, multi-level modulation, multi-polarization multiplexing, etc.
  • the code rate of the electrical signal to the power device is reduced to 1/4 of the line side optical signal rate.
  • the optical module on the line side of the optical transmission network generally converts the rate by non-coherent modulation.
  • the 100 GHz optical signal transmitted on the line side includes two subcarriers separated by 50 GHz, and the single wave rate of the subcarrier is 56 Gb. /s, differential QuadriPhase-Shift Keying (DQPSK) modulation is used for signal output with a code rate of 28Gb/s.
  • DQPSK differential QuadriPhase-Shift Keying
  • the phase of the electric signal may be +/-45°, +/-135. And combinations thereof, therefore, a pattern search of the electrical signals output to the framer, including a combination of I/Q switching and I/Q inversion, is required.
  • the phase removal is the same or the phase difference is 180.
  • Such as the combination of the unavailable patterns and then select the signal data of the phase difference of 90 degrees from the combination of several I and Q phase differences to realize the I and Q data pattern matching, so that the framer can output the data of the correct data mode.
  • a mode search is performed on an electrical signal before outputting to a framer, and data matching is implemented through a mode search.
  • This method of matching data patterns in an optical module requires multiple attempts to obtain correctness.
  • the data mode to achieve the frame after the correct data mode is acquired, it needs to be transmitted to the framer, and waits for the framer to return the confirmation message confirming the correct data mode, which increases the peripheral feedback bus circuit design and leads to the data.
  • the embodiment of the invention provides a signal data pattern matching method, a system and a framer, which are used to solve the problem that the signal data pattern matching needs to increase the peripheral circuit in the prior art, resulting in a slow matching speed.
  • a signal data pattern matching method includes:
  • Performing frame header detection on the signal of each channel of the input framer specifically: outputting signal data of the channel that detects the preset forward frame header;
  • the reverse frame header is forward
  • the frame header is obtained by inverting the operation
  • the data output from each channel is sorted to obtain the output data of the framer.
  • the signal data of the channel that detects the reverse frame header is inverted and output, and specifically includes:
  • the binary number 1 in the signal data of the channel in which the reverse frame header is detected is changed to 0 and the binary number 0 is changed to 1, and the changed data is output.
  • the data outputted by each channel is sorted to obtain output data of the framer, and specifically includes: Obtaining a logical channel label of data outputted by each channel, and sorting data outputted by each channel according to the logical channel label to obtain output data of the framer.
  • the data output by each channel is sorted in ascending order of logical channel labels.
  • the method further includes: outputting an error report signal to a channel that does not detect a forward frame header and does not detect a reverse frame header.
  • the method further includes:
  • a framer comprising:
  • a frame header detecting unit configured to sequentially perform frame header detection on a signal of each channel of the input framer, specifically: outputting signal data of a channel that detects a preset forward frame header; Performing reverse frame header detection on the signal of the channel of the forward frame header, and performing inverse operation on the signal data of the channel detecting the reverse frame header; and performing the inverse operation on the reverse frame header for the forward frame header owned;
  • Matching output unit used to sort the data output by each channel to obtain the output data of the framer.
  • the frame header detecting unit is further configured to: output an error report signal to a channel that does not detect a forward frame header and does not detect a reverse frame header.
  • the matching output unit is further configured to: determine whether there is a channel for outputting the error report signal, and when not present, perform an operation of sorting the data output by each channel to obtain output data of the framer.
  • An optical signal data pattern matching system comprising: an optical module and the framing device; the optical module, configured to multiplex and convert the received optical signal on the line side, Go to a set number of electrical signals and provide them to the framer;
  • the framer is configured to split the electrical signal provided by the optical module to obtain a signal input to each channel of the framer.
  • the signal data pattern matching method, system and framer provided by the embodiment of the invention sequentially perform frame header detection on the signal of each channel of the input framer, and the data output of the channel of the preset forward frame header is detected. Performing reverse frame header detection on the data of the channel in which the forward frame header is not detected, and performing inverse operation on the data of the channel in which the reverse frame header is detected; and then sorting the data outputted by each channel Get the output data of the framer. Data pattern matching of the signal is achieved in the framer, since the phase of the signal input to the framer generally satisfies +/-45. , +/-135.
  • the mode search can be realized quickly and easily, and the data pattern matching is completed.
  • the method is simple and convenient, and reduces unnecessary feedback circuit.
  • the design saves the circuit cost investment; and the signal feedback confirmation process is not needed, which improves the speed and efficiency of data pattern matching.
  • FIG. 1 is a schematic structural diagram of a signal data pattern matching system according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a signal data pattern matching method according to an embodiment of the present invention. detailed description
  • the present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
  • a pattern search is performed on the signal data before the input of the framer, and the matching speed is slow, the efficiency is low, and the support of the peripheral feedback circuit is required in the process of implementing the data pattern matching.
  • the signal data pattern matching method implements matching of data patterns in the framer, and is specifically implemented by performing frame header detection on a signal of each channel of the input framer, and the method adopts a signal data pattern matching system as shown in FIG. Implementation, the system includes an optical module and a framer.
  • the optical module multiplexes the received optical signal on the line side and converts it into a set number of electrical signals for supply to the framer.
  • the framer splits the electrical signal provided by the optical module to obtain a signal input to each channel of the framer.
  • the above optical module includes a receiver and a splitter.
  • the receiver includes two DQPSK receivers, such as the receiver DQPSK(X) and the receiver DQPSK(Y), each of which processes one subcarrier transmitted on the line side and delays the subcarrier. After interference (DLI) adjustment and photoelectric conversion, two electrical signals of I and Q are obtained. It is then demultiplexed (DEMUX) by a splitter to obtain a set number of electrical signals for the framer.
  • the transmission rate of the line side optical signal is 112 Gb/s
  • the optical signal includes two subcarriers
  • the single wave rate is 56 Gb/s.
  • the four actual code rates are 28 Gb/s. electric signal.
  • the four-way electrical signal is demultiplexed by the splitter to realize 4:10 conversion, and 10 electrical signals are obtained and provided to the framer for OTU4 framing.
  • Delay line interference adjustment does not necessarily lock the I and Q signals to +/-45. , but it is possible to lock at +/-45° and +/-135. And its combination.
  • the electrical signals provided to the framer by the above-mentioned splitter require data pattern matching. Unlike the prior art, the data pattern matching in the present invention is performed in the framer.
  • the framer shown in FIG. 1 above includes: a frame header detecting unit and a matching output unit.
  • the frame header detecting unit is configured to perform frame header detection on the signal of each channel of the input framer, and specifically includes: outputting data of a channel that detects a preset forward frame header; The data of the channel of the frame header is subjected to reverse frame header detection, and the data of the channel in which the reverse frame header is detected is inverted and output; wherein the reverse frame header is obtained by inverting the forward frame header.
  • the frame header detecting unit is further configured to output an error report signal to a channel that does not detect a forward frame header or a reverse frame header.
  • Matching output unit used to sort the data output by each channel to obtain the output data of the framer.
  • the matching output unit is further configured to determine whether there is a channel for outputting an error report signal, and when not present, perform the step of sorting the data output by each channel to obtain output data of the framer.
  • the signal data pattern matching is implemented by the framer, and the frame header detection is performed on the signal data of each channel input to the framer, and the data of the channel of the preset forward frame header is detected.
  • the method flow is shown in Figure 2, and the execution steps are as follows:
  • S11 Start the process of performing frame header detection on the signal of each channel of the input framer.
  • the splitter outputs 10 electrical signals in the optical module, and after being supplied to the framer, the framer splits the signal into 20 channels to obtain an input framer for each channel (logical channel). ) signal of.
  • the frame header detection is performed for each channel signal, including forward frame header detection and reverse frame header detection, and the signal data of 20 logical channels are respectively framed.
  • S12 Perform positive frame header detection on the signal.
  • Forward frame header detection is performed on the signal of each channel in the framer.
  • step S14 If yes, go to step S14; otherwise, go to step S15.
  • step S14 When the forward frame header 0xF6F6F6282828 is found in the data signal, step S14 is performed, otherwise step S15 is performed.
  • S14 The signal data of the channel in which the forward frame header is detected is output.
  • the signal data of the path is output, and the corresponding frame header signal is output.
  • the reverse frame header detection is performed on the signal of the path in which the forward frame header is not detected. Specifically, the frame header detection is performed by using the reverse frame header obtained by performing the inverse operation on the forward frame header.
  • the reverse frame header is inverted, and the reverse frame header 0x090909D7D7D7 is obtained.
  • the reverse frame header 0x090909D7D7D7 is used to detect the header of the signal, and whether the signal contains the reverse To the frame header.
  • step S17 If yes, go to step S17; otherwise, go to step S18.
  • step S17 When the reverse frame header 0x090909D7D7D7 is found in the data signal, step S17 is performed, otherwise step S18 is performed.
  • S17 The signal data of the channel in which the reverse frame header is detected is inverted and output.
  • the signal data of the path is inverted and output, and the corresponding frame header signal is output.
  • the signal data of the channel in which the reverse frame header is detected is inverted and output, and specifically includes: changing the binary number 1 in the signal data of the channel in which the reverse frame header is detected to 0 and changing the binary number 0 to 1 , the changed data is output, and the frame header of the changed data is output.
  • An error report signal is output for a channel that does not detect a forward frame header and does not detect a reverse frame header. For example: When the reverse frame header is not found in the channel where the forward frame header is not found, that is, when the frame header is not found, the output optical transmission path - Out of Frame (OTL) is output. OOF) signal.
  • OTL Out of Frame
  • S19 Sort the data outputted by each channel to obtain the output data of the framer.
  • the data outputted by each channel is sorted to obtain the output data of the framer, and specifically includes: acquiring a logical channel label (LLM, Logical Line Marker) of the data outputted by each channel, and sorting the data output by each channel according to the logical channel label, Get the output data of the framer.
  • LLM Logical Line Marker
  • the data output by each channel is sorted in the order of logical channel labels from small to large.
  • the 20 logical channels are reordered according to the smallest to largest LLM of each logical channel extracted, and finally the correct data mode of the framer output is obtained.
  • the frame header of the data of the obtained electrical signal generally satisfies one of the forward frame header and the reverse frame header, and therefore, through the front and back frame header detection, The framer always finds the correct data pattern.
  • the method may further include:
  • the matching method is applicable to the 100G system, and can complete the data pattern matching of the output signals of the two DQPSK receivers in the 100G system.
  • the signal data pattern matching method, system and framer provided by the embodiment of the invention sequentially perform frame header detection on the signal of each channel of the input framer, and the data output of the channel of the preset forward frame header is detected. Performing reverse frame header detection on the data of the channel in which the forward frame header is not detected, and inverting and outputting the data of the channel detecting the reverse frame header; and then sorting the data outputted by each channel to obtain The output data of the framer.
  • the pattern search can be conveniently and quickly implemented in the framer to complete the data pattern matching, and the method is completed.
  • the implementation is simple and convenient, reduces the unnecessary feedback circuit design, does not need to feed back the signal to the line side optical module, saves the circuit cost investment; and does not need the signal feedback confirmation process, which improves the speed and efficiency of data pattern matching.

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Abstract

Disclosed is a signal data model matching method, system and framer. The method comprises: performing header detection on a signal of each channel that is input into a framer, specifically comprising: outputting signal data of a channel on which a preset forward header is detected; perform reverse header detection on a signal of a channel on which the forward header is not detected, and performing inversion operation on signal data of a channel on which a reverse header is detected, and outputting the signal data, wherein the reverse header is obtained through inversion operation of the forward header; and sorting data output from each channel, to obtain output data of the framer. The method can be implemented in the framer, is simple and convenient, and requires no signal feedback, so that the circuit cost is saved and the matching speed is improved.

Description

信号数据模式匹配方法、 ***及成帧器 技术领域  Signal data pattern matching method, system and framer
本发明涉及光网络技术领域，尤其涉及一种适用于 100G光传送***的 信号数据模式匹配方法、 ***及成帧器。 背景技术  The present invention relates to the field of optical network technologies, and in particular, to a signal data pattern matching method, system and framer suitable for a 100G optical transmission system. Background technique
随着承载网市场带宽需求高速增长， 100GE 端口已经在核心路由器上 广泛使用， 支持 100G 的长距离传输也成为高密度多工分波器 （Dense Wavelength-Division Multiplexing , DWDM )设备的明确发展方向。  With the rapid growth of the bandwidth demand of the bearer network, 100GE ports have been widely used on core routers. Supporting long-distance transmission of 100G has also become a clear development direction for Dense Wavelength-Division Multiplexing (DWDM) devices.
对于 100G的光传送网（Optical Transport Network, OTN )标准， ITU-T ( International Telecommunication Union-TELECOMMU ICATION , 国际电 信联盟 -电信领域） 已经制订 OTU4 ( Optical channel Transport Unit, 光通道 传送单元） 的相关封装定义； 其中， OTU4 在线路侧的光信号速率约为 112Gb/s, 由于电器件无法处理这么高的速率， 一般需要釆用多波长、 多电 平调制、 多偏振复用等技术组合， 将传送给电器件的电信号的码速率降低 为线路侧光信号速率 1/4。  For the 100G optical transport network (OTN) standard, the ITU-T (International Telecommunication Union-TELECOMMU ICATION) has developed an OTU4 (Optical Channel Transport Unit) related package. Definition; Among them, the optical signal rate of the OTU4 on the line side is about 112Gb/s. Since the electrical device cannot handle such a high rate, it is generally required to use a combination of technologies such as multi-wavelength, multi-level modulation, multi-polarization multiplexing, etc. The code rate of the electrical signal to the power device is reduced to 1/4 of the line side optical signal rate.
目前， 一般由光传送网络中线路侧的光模块釆用非相干调制的方式实 现速率的转换， 线路侧传送的 100GHz的光信号中包含间隔 50GHz的两个 子载波，子载波的单波速率为 56Gb/s,经差分四相正交相移健控（ Differential QuadriPhase-Shift Keying, DQPSK )调制为码速率为 28Gb/s的信号输出。  At present, the optical module on the line side of the optical transmission network generally converts the rate by non-coherent modulation. The 100 GHz optical signal transmitted on the line side includes two subcarriers separated by 50 GHz, and the single wave rate of the subcarrier is 56 Gb. /s, differential QuadriPhase-Shift Keying (DQPSK) modulation is used for signal output with a code rate of 28Gb/s.
由于线路侧光信号经 2个 DQPSK调制及光电转换得到的四路电信号， 并经过 4: 10转换得到的 10路电信号传输给成帧器进行 OTU4定帧时， 电 信号的相位可能会是 +/-45°、 +/-135。及其组合， 因此， 需要对输出给成帧器 的电信号进行模式搜索 （pattern search ), 包括 I/Q交换、 I/Q取反的组合， 去除相位相同或者相位相差 180。等不可用的 pattern组合， 进而从几种 I和 Q相位差的组合中选出 90度相位差的信号数据， 实现 I、 Q数据模式匹配， 才能使成帧器输出正确数据模式的数据。 Since the line side optical signal is subjected to two DQPSK modulation and photoelectric conversion four electric signals, and the 10 electric signals obtained by the 4:10 conversion are transmitted to the framer for OTU4 framing, the phase of the electric signal may be +/-45°, +/-135. And combinations thereof, therefore, a pattern search of the electrical signals output to the framer, including a combination of I/Q switching and I/Q inversion, is required. The phase removal is the same or the phase difference is 180. Such as the combination of the unavailable patterns, and then select the signal data of the phase difference of 90 degrees from the combination of several I and Q phase differences to realize the I and Q data pattern matching, so that the framer can output the data of the correct data mode.
现有技术中一般是在输出给成帧器之前， 对电信号进行模式搜索， 通 过模式搜索实现数据匹配， 这种在光模块中进行数据模式匹配的方式， 需 要多次的尝试来获取到正确的数据模式以实现定帧， 在获取到正确的数据 模式后还需要传送给成帧器， 并等待成帧器返回确认数据模式正确的确认 信息， 这增加了***反馈总线电路设计， 并导致数据模式匹配的速度慢、 效率低等若干问题。 发明内容  In the prior art, a mode search is performed on an electrical signal before outputting to a framer, and data matching is implemented through a mode search. This method of matching data patterns in an optical module requires multiple attempts to obtain correctness. The data mode to achieve the frame, after the correct data mode is acquired, it needs to be transmitted to the framer, and waits for the framer to return the confirmation message confirming the correct data mode, which increases the peripheral feedback bus circuit design and leads to the data. There are several problems with slow pattern matching and low efficiency. Summary of the invention
本发明实施例提供一种信号数据模式匹配方法、 ***及成帧器， 用以 解决现有技术中存在信号数据模式匹配需要增加***电路， 导致匹配速度 慢的问题。  The embodiment of the invention provides a signal data pattern matching method, a system and a framer, which are used to solve the problem that the signal data pattern matching needs to increase the peripheral circuit in the prior art, resulting in a slow matching speed.
一种信号数据模式匹配方法， 包括：  A signal data pattern matching method includes:
针对输入成帧器的每个通道的信号进行帧头检测， 具体包括： 将检测到预设的正向帧头的通道的信号数据输出；  Performing frame header detection on the signal of each channel of the input framer, specifically: outputting signal data of the channel that detects the preset forward frame header;
对未检测到所述正向帧头的通道的信号进行反向帧头检测， 并将检测 到反向帧头的通道的信号数据进行取反运算后输出； 所述反向帧头为正向 帧头进行取反运算得到的；  Performing a reverse frame header detection on a signal of the channel in which the forward frame header is not detected, and performing inverse operation on the signal data of the channel in which the reverse frame header is detected; the reverse frame header is forward The frame header is obtained by inverting the operation;
将各通道输出的数据进行排序得到成帧器的输出数据。  The data output from each channel is sorted to obtain the output data of the framer.
所述将检测到反向帧头的通道的信号数据进行取反运算后输出， 具体 包括：  The signal data of the channel that detects the reverse frame header is inverted and output, and specifically includes:
将检测到反向帧头的通道的信号数据中的二进制数 1变为 0以及将二 进制数 0变为 1 , 将变化后的数据输出。  The binary number 1 in the signal data of the channel in which the reverse frame header is detected is changed to 0 and the binary number 0 is changed to 1, and the changed data is output.
所述将各通道输出的数据进行排序得到成帧器的输出数据， 具体包括： 获取各通道输出的数据的逻辑通道标号， 根据所述逻辑通道标号对各 通道输出的数据进行排序， 得到成帧器的输出数据。 按照逻辑通道标号由小到大的顺序对各通道输出的数据进行排序。 所述方法还包括： 对未检测到正向帧头且未检测到反向帧头的通道， 输出错误报告信号。 The data outputted by each channel is sorted to obtain output data of the framer, and specifically includes: Obtaining a logical channel label of data outputted by each channel, and sorting data outputted by each channel according to the logical channel label to obtain output data of the framer. The data output by each channel is sorted in ascending order of logical channel labels. The method further includes: outputting an error report signal to a channel that does not detect a forward frame header and does not detect a reverse frame header.
所述将各通道输出的数据进行排序得到成帧器的输出数据之前， 所述 方法还包括：  Before the data output by each channel is sorted to obtain the output data of the framer, the method further includes:
判断是否存在输出错误报告信号的通道， 当不存在时， 再执行将各通 道输出的数据进行排序得到成帧器的输出数据的操作。  It is judged whether or not there is a channel for outputting the error report signal, and when it does not exist, the operation of sorting the data output from each channel to obtain the output data of the framer is performed.
一种成帧器， 包括：  A framer comprising:
帧头检测单元， 用于针对输入成帧器的每个通道的信号依次进行帧头 检测， 具体包括： 将检测到预设的正向帧头的通道的信号数据输出； 对未 检测到所述正向帧头的通道的信号进行反向帧头检测， 并将检测到反向帧 头的通道的信号数据进行取反运算后输出； 所述反向帧头为正向帧头进行 取反运算得到的；  a frame header detecting unit, configured to sequentially perform frame header detection on a signal of each channel of the input framer, specifically: outputting signal data of a channel that detects a preset forward frame header; Performing reverse frame header detection on the signal of the channel of the forward frame header, and performing inverse operation on the signal data of the channel detecting the reverse frame header; and performing the inverse operation on the reverse frame header for the forward frame header owned;
匹配输出单元， 用于将各通道输出的数据进行排序得到成帧器的输出 数据。  Matching output unit, used to sort the data output by each channel to obtain the output data of the framer.
所述帧头检测单元还用于： 对未检测到正向帧头且未检测到反向帧头 的通道， 输出错误报告信号。  The frame header detecting unit is further configured to: output an error report signal to a channel that does not detect a forward frame header and does not detect a reverse frame header.
匹配输出单元还用于： 判断是否存在输出错误报告信号的通道， 当不 存在时， 再执行将各通道输出的数据进行排序得到成帧器的输出数据的操 作。  The matching output unit is further configured to: determine whether there is a channel for outputting the error report signal, and when not present, perform an operation of sorting the data output by each channel to obtain output data of the framer.
一种光信号数据模式匹配***， 包括： 光模块和上述的成帧器； 所述光模块， 用于对接收到的线路侧的光信号进行多路复用转换， 得 到设定数量的电信号并提供给成帧器； An optical signal data pattern matching system, comprising: an optical module and the framing device; the optical module, configured to multiplex and convert the received optical signal on the line side, Go to a set number of electrical signals and provide them to the framer;
所述成帧器， 用于对光模块提供的电信号进行分路， 得到输入成帧器 的每个通道的信号。  The framer is configured to split the electrical signal provided by the optical module to obtain a signal input to each channel of the framer.
本发明有益效果如下：  The beneficial effects of the present invention are as follows:
本发明实施例提供的信号数据模式匹配方法、 ***及成帧器， 针对输 入成帧器的每个通道的信号依次进行帧头检测， 将检测到预设的正向帧头 的通道的数据输出； 对未检测到所述正向帧头的通道的数据进行反向帧头 检测， 并将检测到反向帧头的通道的数据进行取反运算后输出； 然后将各 通道输出的数据进行排序得到成帧器的输出数据。 在成帧器中实现对信号 的数据模式匹配，由于输入到成帧器的信号相位一般都满足 +/-45。、 +/-135。， 因此， 通过对通道中的数据进行正向帧头和反向帧头双重检测， 即可方便 快捷地实现模式搜索， 完成数据模式匹配， 该方法实现简单、 方便， 减少 了不必要的反馈电路设计， 节约了电路成本投入； 且无需信号反馈确认流 程， 提高了数据模式匹配的速度和效率。 附图说明  The signal data pattern matching method, system and framer provided by the embodiment of the invention sequentially perform frame header detection on the signal of each channel of the input framer, and the data output of the channel of the preset forward frame header is detected. Performing reverse frame header detection on the data of the channel in which the forward frame header is not detected, and performing inverse operation on the data of the channel in which the reverse frame header is detected; and then sorting the data outputted by each channel Get the output data of the framer. Data pattern matching of the signal is achieved in the framer, since the phase of the signal input to the framer generally satisfies +/-45. , +/-135. Therefore, by performing double detection of the forward frame header and the reverse frame header on the data in the channel, the mode search can be realized quickly and easily, and the data pattern matching is completed. The method is simple and convenient, and reduces unnecessary feedback circuit. The design saves the circuit cost investment; and the signal feedback confirmation process is not needed, which improves the speed and efficiency of data pattern matching. DRAWINGS
此处所说明的附图用来提供对本发明的进一步理解， 构成本发明的一 部分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发 明的不当限定。 在附图中：  The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:
图 1为本发明实施例中信号数据模式匹配***的结构示意图； 图 2为本发明实施例中信号数据模式匹配方法的流程图。 具体实施方式  1 is a schematic structural diagram of a signal data pattern matching system according to an embodiment of the present invention; and FIG. 2 is a flowchart of a signal data pattern matching method according to an embodiment of the present invention. detailed description
为了使本发明所要解决的技术问题、 技术方案及有益效果更加清楚、 明白， 以下结合附图和实施例， 对本发明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仅用以解释本发明， 并不用于限定本发明。 针对现有技术中在输入成帧器之前对信号数据进行模式搜索， 在实现 数据模式匹配的过程中存在的匹配速度慢、 效率低， 需要***反馈电路支 持等问题， 本发明实施例提供一种信号数据模式匹配方法， 在成帧器中实 现数据模式的匹配， 具体通过对输入成帧器的每个通道的信号进行帧头检 测实现， 该方法通过如图 1 所示的信号数据模式匹配***实现， 该***包 括光模块和成帧器。 The present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In the prior art, a pattern search is performed on the signal data before the input of the framer, and the matching speed is slow, the efficiency is low, and the support of the peripheral feedback circuit is required in the process of implementing the data pattern matching. The signal data pattern matching method implements matching of data patterns in the framer, and is specifically implemented by performing frame header detection on a signal of each channel of the input framer, and the method adopts a signal data pattern matching system as shown in FIG. Implementation, the system includes an optical module and a framer.
上述光模块对接收到的线路侧的光信号进行多路复用转换， 转换为设 定数量的电信号提供给成帧器。 成帧器对光模块提供的电信号进行分路， 得到输入成帧器的每个通道的信号。  The optical module multiplexes the received optical signal on the line side and converts it into a set number of electrical signals for supply to the framer. The framer splits the electrical signal provided by the optical module to obtain a signal input to each channel of the framer.
如图 1 所示， 上述光模块包括接收机和分路器两部分。 接收机包括 2 个 DQPSK接收机，如图中所示的接收机 DQPSK( X )和接收机 DQPSK( Y ), 每个接收机对线路侧传送的一个子载波进行处理， 对子载波进行延迟线干 涉（DLI )调整和光电转换后， 得到 I和 Q两路电信号。 然后由分路器进行 解复用 （DEMUX ), 得到设定数量的电信号提供给成帧器。  As shown in FIG. 1, the above optical module includes a receiver and a splitter. The receiver includes two DQPSK receivers, such as the receiver DQPSK(X) and the receiver DQPSK(Y), each of which processes one subcarrier transmitted on the line side and delays the subcarrier. After interference (DLI) adjustment and photoelectric conversion, two electrical signals of I and Q are obtained. It is then demultiplexed (DEMUX) by a splitter to obtain a set number of electrical signals for the framer.
例如线路侧光信号的传输速率为 112Gb/s, 该光信号包括两个子载波， 则单波速率为 56Gb/s, 经两个 DQPSK接收机处理后， 得到四路实际码率 为 28Gb/s的电信号。 由分路器对四路电信号进行解复用， 实现 4: 10转换， 得到 10路电信号提供给成帧器进行 OTU4定帧。  For example, the transmission rate of the line side optical signal is 112 Gb/s, and the optical signal includes two subcarriers, and the single wave rate is 56 Gb/s. After being processed by two DQPSK receivers, the four actual code rates are 28 Gb/s. electric signal. The four-way electrical signal is demultiplexed by the splitter to realize 4:10 conversion, and 10 electrical signals are obtained and provided to the framer for OTU4 framing.
延迟线干涉调整不一定能将 I和 Q两路信号锁定到 +/-45。， 而是有可能 锁定在 +/-45°和 +/-135。和及其组合。上述分路器提供给成帧器的电信号需要 进行数据模式匹配， 与现有技术不同的是本发明中数据模式匹配是在成帧 器中进行的。  Delay line interference adjustment does not necessarily lock the I and Q signals to +/-45. , but it is possible to lock at +/-45° and +/-135. And its combination. The electrical signals provided to the framer by the above-mentioned splitter require data pattern matching. Unlike the prior art, the data pattern matching in the present invention is performed in the framer.
上述图 1所示的成帧器， 包括： 帧头检测单元和匹配输出单元。 其中： 帧头检测单元， 用于针对输入成帧器的每个通道的信号进行帧头检测， 具体包括： 将检测到预设的正向帧头的通道的数据输出； 对未检测到正向 帧头的通道的数据进行反向帧头检测， 并将检测到反向帧头的通道的数据 进行取反运算后输出； 其中反向帧头为正向帧头进行取反运算得到的。 The framer shown in FIG. 1 above includes: a frame header detecting unit and a matching output unit. The frame header detecting unit is configured to perform frame header detection on the signal of each channel of the input framer, and specifically includes: outputting data of a channel that detects a preset forward frame header; The data of the channel of the frame header is subjected to reverse frame header detection, and the data of the channel in which the reverse frame header is detected is inverted and output; wherein the reverse frame header is obtained by inverting the forward frame header.
上述帧头检测单元， 还用于对未检测到正向帧头也未检测到反向帧头 的通道， 输出错误报告信号。  The frame header detecting unit is further configured to output an error report signal to a channel that does not detect a forward frame header or a reverse frame header.
匹配输出单元， 用于将各通道输出的数据进行排序得到成帧器的输出 数据。  Matching output unit, used to sort the data output by each channel to obtain the output data of the framer.
上述匹配输出单元， 还用于判断是否存在输出错误报告信号的通道， 当不存在时， 再执行将各通道输出的数据进行排序得到成帧器的输出数据 的步骤。  The matching output unit is further configured to determine whether there is a channel for outputting an error report signal, and when not present, perform the step of sorting the data output by each channel to obtain output data of the framer.
上述图 1 所示的***中， 由成帧器实现信号数据模式匹配， 针对输入 成帧器的每个通道的信号数据进行帧头检测， 将检测到预设的正向帧头的 通道的数据输出； 对未检测到正向帧头的通道的数据进行反向帧头检测， 并将检测到反向帧头的通道的数据进行取反运算后输出； 其中反向帧头为 正向帧头进行取反运算得到的； 将各通道输出的数据进行排序得到成帧器 的输出数据， 从而得到正确数据模式的输出数据。 该方法流程如图 2所示， 执行步骤如下：  In the system shown in FIG. 1, the signal data pattern matching is implemented by the framer, and the frame header detection is performed on the signal data of each channel input to the framer, and the data of the channel of the preset forward frame header is detected. Output; performing reverse frame header detection on the data of the channel in which the forward frame header is not detected, and performing inverse operation on the data of the channel in which the reverse frame header is detected; wherein the reverse frame header is a forward frame header Performing the inverse operation; sorting the data output by each channel to obtain the output data of the framer, thereby obtaining the output data of the correct data mode. The method flow is shown in Figure 2, and the execution steps are as follows:
S11 : 启动针对输入成帧器的每个通道的信号进行帧头检测的流程。 例如图 1所示的***中光模块中分路器输出 10路电信号， 提供给成帧 器后， 成帧器将其分路为 20路信号，得到输入成帧器每个通道（逻辑通道） 的信号。 针对每个通道的信号进行帧头检测， 包括正向帧头检测和反向帧 头检测， 实现对 20个逻辑通道的信号数据分别进行定帧。  S11: Start the process of performing frame header detection on the signal of each channel of the input framer. For example, in the system shown in FIG. 1, the splitter outputs 10 electrical signals in the optical module, and after being supplied to the framer, the framer splits the signal into 20 channels to obtain an input framer for each channel (logical channel). ) signal of. The frame header detection is performed for each channel signal, including forward frame header detection and reverse frame header detection, and the signal data of 20 logical channels are respectively framed.
S12: 对信号进行正向帧头检测。  S12: Perform positive frame header detection on the signal.
针对成帧器中每一个通道的信号进行正向帧头检测。  Forward frame header detection is performed on the signal of each channel in the framer.
例如： 使用预设的正向帧头 0xF6F6F6282828, 对信号进行帧头检测， 寻找每个通道中各信号数据的帧头。 S13: 信号数据中是否检测到预设的正向帧头。 For example: Use the preset forward frame header 0xF6F6F6282828 to perform frame header detection on the signal to find the frame header of each signal data in each channel. S13: Whether a preset forward frame header is detected in the signal data.
若是， 执行步骤 S14; 否则执行步骤 S15。  If yes, go to step S14; otherwise, go to step S15.
例如： 在数据信号中寻找到正向帧头 0xF6F6F6282828 时， 执行步骤 S14, 否则执行步骤 S15。  For example: When the forward frame header 0xF6F6F6282828 is found in the data signal, step S14 is performed, otherwise step S15 is performed.
S14: 将检测到正向帧头的通道的信号数据输出。  S14: The signal data of the channel in which the forward frame header is detected is output.
针对检测到正向帧头的通路， 将该通路的信号数据输出， 并且输出相 应的帧头信号。  For the path in which the forward frame header is detected, the signal data of the path is output, and the corresponding frame header signal is output.
S 15： 对信号进行反向帧头检测。  S 15: Perform reverse frame header detection on the signal.
针对未检测到正向帧头的通路的信号进行反向帧头检测， 具体是： 使 用对正向帧头进行取反运算得到的反向帧头进行帧头检测。  The reverse frame header detection is performed on the signal of the path in which the forward frame header is not detected. Specifically, the frame header detection is performed by using the reverse frame header obtained by performing the inverse operation on the forward frame header.
例如：正向帧头为 0xF6F6F6282828时，对该正向帧头进行取反运算后， 即可得到反向帧头 0x090909D7D7D7 , 使用反向帧头 0x090909D7D7D7对 信号进行帧头检测， 寻找信号中是否包含反向帧头。  For example, when the forward frame header is 0xF6F6F6282828, the reverse frame header is inverted, and the reverse frame header 0x090909D7D7D7 is obtained. The reverse frame header 0x090909D7D7D7 is used to detect the header of the signal, and whether the signal contains the reverse To the frame header.
S16: 信号数据中是否检测到反向帧头。  S16: Whether a reverse frame header is detected in the signal data.
若是， 执行步骤 S17; 否则执行步骤 S18。  If yes, go to step S17; otherwise, go to step S18.
例如： 在数据信号中寻找到反向帧头 0x090909D7D7D7时， 执行步骤 S17, 否则执行步骤 S18。  For example: When the reverse frame header 0x090909D7D7D7 is found in the data signal, step S17 is performed, otherwise step S18 is performed.
S17: 将检测到反向帧头的通道的信号数据进行取反运算后输出。  S17: The signal data of the channel in which the reverse frame header is detected is inverted and output.
针对检测到反向帧头的通路， 将该通路的信号数据进行取反运算后输 出， 并且输出相应的帧头信号。  For the path of detecting the reverse frame header, the signal data of the path is inverted and output, and the corresponding frame header signal is output.
将检测到反向帧头的通道的信号数据进行取反运算后输出， 具体包括： 将检测到反向帧头的通道的信号数据中的二进制数 1变为 0以及将二进制 数 0变为 1 , 将变化后的数据输出， 并将变化后的数据的帧头输出。  The signal data of the channel in which the reverse frame header is detected is inverted and output, and specifically includes: changing the binary number 1 in the signal data of the channel in which the reverse frame header is detected to 0 and changing the binary number 0 to 1 , the changed data is output, and the frame header of the changed data is output.
S18: 输出错误报告信号。  S18: Output error report signal.
对未检测到正向帧头也未检测到反向帧头的通道， 输出错误报告信号。 例如： 对未找到正向帧头的通道， 也未找到反向帧头时， 即找不到帧 头时， 则输出光传送通路—帧失步（Optical channel Transport Lane— Out Of Frame, OTL— OOF )信号。 An error report signal is output for a channel that does not detect a forward frame header and does not detect a reverse frame header. For example: When the reverse frame header is not found in the channel where the forward frame header is not found, that is, when the frame header is not found, the output optical transmission path - Out of Frame (OTL) is output. OOF) signal.
S19: 将各通道输出的数据进行排序得到成帧器的输出数据。  S19: Sort the data outputted by each channel to obtain the output data of the framer.
将各通道输出的数据进行排序得到成帧器的输出数据， 具体包括： 获取各通道输出的数据的逻辑通道标号 （ LLM, Logical Line Marker ), 根据逻辑通道标号对各通道输出的数据进行排序， 得到成帧器的输出数据。 其中按照逻辑通道标号由小到大的顺序对各通道输出的数据进行排序。  The data outputted by each channel is sorted to obtain the output data of the framer, and specifically includes: acquiring a logical channel label (LLM, Logical Line Marker) of the data outputted by each channel, and sorting the data output by each channel according to the logical channel label, Get the output data of the framer. The data output by each channel is sorted in the order of logical channel labels from small to large.
例如： 将 20个逻辑通道的信号数据输出后， 按照提取的每个逻辑通道 的 LLM的由小到大的顺序将 20个逻辑通道进行重新排序， 最终得到成帧 器输出的正确的数据模式。  For example: After outputting the signal data of 20 logical channels, the 20 logical channels are reordered according to the smallest to largest LLM of each logical channel extracted, and finally the correct data mode of the framer output is obtained.
由于在***正常工作， 延迟线干涉正确的情况下， 得到的电信号的数 据的帧头一般必然会满足正向帧头和反向帧头中的一个， 因此， 通过正反 帧头检测， 成帧器总能找到正确的数据模式。 但优选地， 上述方法中将各 通道输出的数据进行排序得到成帧器的输出数据之前， 还可以包括：  Since the delay of the delay line interference is correct in the normal operation of the system, the frame header of the data of the obtained electrical signal generally satisfies one of the forward frame header and the reverse frame header, and therefore, through the front and back frame header detection, The framer always finds the correct data pattern. Preferably, before the data output by each channel is sorted to obtain the output data of the framer, the method may further include:
判断是否存在输出错误报告信号的通道， 当不存在时， 再执行将各通 道输出的数据进行排序得到成帧器的输出数据的步骤； 当存在时， 输出告 本发明实施例提供的上述数据模式匹配方法适用于 100G***，可以完 成 100G***中 2个 DQPSK接收机输出信号的数据模式匹配。  Determining whether there is a channel for outputting an error report signal, and when not present, performing the step of sorting the data output by each channel to obtain output data of the framer; when present, outputting the above data mode provided by the embodiment of the present invention The matching method is applicable to the 100G system, and can complete the data pattern matching of the output signals of the two DQPSK receivers in the 100G system.
本发明实施例提供的信号数据模式匹配方法、 ***及成帧器， 针对输 入成帧器的每个通道的信号依次进行帧头检测， 将检测到预设的正向帧头 的通道的数据输出； 对未检测到正向帧头的通道的数据进行反向帧头检测， 并将检测到反向帧头的通道的数据进行取反运算后输出； 然后将各通道输 出的数据进行排序得到成帧器的输出数据。 在成帧器中实现对信号的数据 模式匹配， 由于输入到成帧器的信号相位一般都满足 +/-45。、 +/-135。， 因此， 通过对成帧器的改进， 对通道中的数据进行正向帧头和反向帧头双重检测 , 即可在成帧器内部方便快捷地实现模式搜索， 完成数据模式匹配， 该方法 实现简单、 方便， 减少了不必要的反馈电路设计， 不需要给线路侧光模块 反馈信号， 节约了电路成本投入； 且无需信号反馈确认流程， 提高了数据 模式匹配的速度和效率。 The signal data pattern matching method, system and framer provided by the embodiment of the invention sequentially perform frame header detection on the signal of each channel of the input framer, and the data output of the channel of the preset forward frame header is detected. Performing reverse frame header detection on the data of the channel in which the forward frame header is not detected, and inverting and outputting the data of the channel detecting the reverse frame header; and then sorting the data outputted by each channel to obtain The output data of the framer. Implementing data on the signal in the framer Pattern matching, since the phase of the signal input to the framer generally meets +/-45. , +/-135. Therefore, by improving the framer, performing double detection of the forward frame header and the reverse frame header on the data in the channel, the pattern search can be conveniently and quickly implemented in the framer to complete the data pattern matching, and the method is completed. The implementation is simple and convenient, reduces the unnecessary feedback circuit design, does not need to feed back the signal to the line side optical module, saves the circuit cost investment; and does not need the signal feedback confirmation process, which improves the speed and efficiency of data pattern matching.
上述说明示出并描述了本发明的优选实施例， 但如前所述， 应当理解 本发明并非局限于本文所披露的形式， 不应看作是对其他实施例的排除， 而可用于各种其他组合、 修改和环境， 并能够在本文所述发明构想范围内， 通过上述教导或相关领域的技术或知识进行改动。 而本领域人员所进行的 改动和变化不脱离本发明的精神和范围， 则都应在本发明所附权利要求的 保护范围内。  The above description shows and describes a preferred embodiment of the present invention, but as described above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be construed as being Other combinations, modifications, and environments are possible and can be modified by the teachings of the above teachings or related art within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

权利要求书 Claim
1、 一种信号数据模式匹配方法， 其特征在于， 包括：  A signal data pattern matching method, comprising:
针对输入成帧器的每个通道的信号进行帧头检测， 具体包括： 将检测到预设的正向帧头的通道的信号数据输出；  Performing frame header detection on the signal of each channel of the input framer, specifically: outputting signal data of the channel that detects the preset forward frame header;
对未检测到所述正向帧头的通道的信号进行反向帧头检测， 并将检测 到反向帧头的通道的信号数据进行取反运算后输出； 所述反向帧头为正向 帧头进行取反运算得到的；  Performing a reverse frame header detection on a signal of the channel in which the forward frame header is not detected, and performing inverse operation on the signal data of the channel in which the reverse frame header is detected; the reverse frame header is forward The frame header is obtained by inverting the operation;
将各通道输出的数据进行排序得到成帧器的输出数据。  The data output from each channel is sorted to obtain the output data of the framer.
2、 如权利要求 1所述的方法， 其特征在于， 所述将检测到反向帧头的 通道的信号数据进行取反运算后输出， 具体包括：  The method according to claim 1, wherein the signal data of the channel in which the reverse frame header is detected is inverted and output, and specifically includes:
将检测到反向帧头的通道的信号数据中的二进制数 1变为 0以及将二 进制数 0变为 1 , 将变化后的数据输出。  The binary number 1 in the signal data of the channel in which the reverse frame header is detected is changed to 0 and the binary number 0 is changed to 1, and the changed data is output.
3、 如权利要求 1所述的方法， 其特征在于， 所述将各通道输出的数据 进行排序得到成帧器的输出数据， 具体包括：  The method according to claim 1, wherein the data outputted by each channel is sorted to obtain output data of the framer, and specifically includes:
获取各通道输出的数据的逻辑通道标号， 根据所述逻辑通道标号对各 通道输出的数据进行排序， 得到成帧器的输出数据。  Obtaining logical channel labels of data outputted by each channel, and sorting data outputted by each channel according to the logical channel label to obtain output data of the framer.
4、 如权利要求 3所述的方法， 其特征在于， 所述根据所述逻辑通道标 号对各通道的数据进行排序， 具体包括：  The method according to claim 3, wherein the sorting the data of each channel according to the logical channel label comprises:
按照逻辑通道标号由小到大的顺序对各通道输出的数据进行排序。 The data output by each channel is sorted in ascending order of logical channel labels.
5、 如权利要求 1至 4中任一项所述的方法， 其特征在于， 所述方法还 包括： 对未检测到正向帧头且未检测到反向帧头的通道， 输出错误报告信 号。 The method according to any one of claims 1 to 4, wherein the method further comprises: outputting an error report signal to a channel that does not detect a forward frame header and does not detect a reverse frame header .
6、 如权利要求 5所述的方法， 其特征在于， 所述将各通道输出的数据 进行排序得到成帧器的输出数据之前， 所述方法还包括：  The method according to claim 5, wherein before the data output by each channel is sorted to obtain output data of the framer, the method further includes:
判断是否存在输出错误报告信号的通道， 当不存在时， 再执行将各通 道输出的数据进行排序得到成帧器的输出数据的操作。 Determine whether there is a channel for outputting an error report signal, and if it does not exist, execute each pass The data output by the track is sorted to obtain the output data of the framer.
7、 一种成帧器， 其特征在于， 包括：  7. A framer, comprising:
帧头检测单元， 用于针对输入成帧器的每个通道的信号依次进行帧头 检测， 具体包括： 将检测到预设的正向帧头的通道的信号数据输出； 对未 检测到所述正向帧头的通道的信号进行反向帧头检测， 并将检测到反向帧 头的通道的信号数据进行取反运算后输出； 所述反向帧头为正向帧头进行 取反运算得到的；  a frame header detecting unit, configured to sequentially perform frame header detection on a signal of each channel of the input framer, specifically: outputting signal data of a channel that detects a preset forward frame header; Performing reverse frame header detection on the signal of the channel of the forward frame header, and performing inverse operation on the signal data of the channel detecting the reverse frame header; and performing the inverse operation on the reverse frame header for the forward frame header owned;
匹配输出单元， 用于将各通道输出的数据进行排序得到成帧器的输出 数据。  Matching output unit, used to sort the data output by each channel to obtain the output data of the framer.
8、 如权利要求 7所述的成帧器， 其特征在于， 所述帧头检测单元还用 于： 对未检测到正向帧头且未检测到反向帧头的通道， 输出错误报告信号。  The framer according to claim 7, wherein the frame header detecting unit is further configured to: output an error report signal to a channel that does not detect a forward frame header and does not detect a reverse frame header. .
9、 如权利要求 8所述的成帧器， 其特征在于， 匹配输出单元还用于： 判断是否存在输出错误报告信号的通道， 当不存在时， 再执行将各通 道输出的数据进行排序得到成帧器的输出数据的操作。  The framer according to claim 8, wherein the matching output unit is further configured to: determine whether there is a channel for outputting an error report signal, and if not, perform sorting the data output by each channel to obtain The operation of the framer's output data.
10、 一种信号数据模式匹配***， 其特征在于， 包括： 光模块和如权 利要求 7至 9任一项所述的成帧器；  A signal data pattern matching system, comprising: an optical module; and the framer according to any one of claims 7 to 9;
所述光模块， 用于对接收到的线路侧的光信号进行多路复用转换， 得 到设定数量的电信号并提供给成帧器；  The optical module is configured to multiplex and convert the received optical signal on the line side to obtain a set number of electrical signals and provide the data to the framer;
所述成帧器， 用于对光模块提供的电信号进行分路， 得到输入成帧器 的每个通道的信号。  The framer is configured to split the electrical signal provided by the optical module to obtain a signal input to each channel of the framer.
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