WO2012159417A1 - 一种光标签的实现方法和系统 - Google Patents

一种光标签的实现方法和系统 Download PDF

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Publication number
WO2012159417A1
WO2012159417A1 PCT/CN2011/081394 CN2011081394W WO2012159417A1 WO 2012159417 A1 WO2012159417 A1 WO 2012159417A1 CN 2011081394 W CN2011081394 W CN 2011081394W WO 2012159417 A1 WO2012159417 A1 WO 2012159417A1
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Prior art keywords
time
tag
sharing
roadm
wavelength
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English (en)
French (fr)
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尚迎春
华锋
陈勋
余进
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ZTE Corp
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ZTE Corp
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Priority to KR1020137033954A priority Critical patent/KR101548069B1/ko
Priority to JP2014511705A priority patent/JP5775636B2/ja
Priority to EP11866079.4A priority patent/EP2717484B1/en
Publication of WO2012159417A1 publication Critical patent/WO2012159417A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0256—Optical medium access at the optical channel layer
    • H04J14/0258—Wavelength identification or labelling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0267—Optical signaling or routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0272—Transmission of OAMP information
    • H04J14/0275—Transmission of OAMP information using an optical service channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0272—Transmission of OAMP information
    • H04J14/0276—Transmission of OAMP information using pilot tones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/08—Time-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/427—Loop networks with decentralised control
    • H04L12/433—Loop networks with decentralised control with asynchronous transmission, e.g. token ring, register insertion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1301—Optical transmission, optical switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13367—Hierarchical multiplexing, add-drop multiplexing

Definitions

  • the present invention relates to an optical communication network, and more particularly to an implementation method and system for an optical tag. Background technique
  • Wavelength Division Multiplex Current optical communication networks can simultaneously transmit multiple optical signals or optical channels of different wavelengths in the same optical fiber, and are based on reconfigurable optical add/drop multiplexing.
  • the technology of the ROADM Reconfigurable Optical Add-Drop Multiplexer
  • a low frequency tag signal may be superimposed on the wavelength in the optical network, and the tag signal in the optical channel is identified on each node in the network, and the tag signal information (ie, the tag is solved)
  • the information carried by the signal which obtains information about the transmission path and wavelength of the wavelength in the network.
  • the method of loading the tag signal includes using an electrically tunable optical attenuator, an optical transmitter with a low-speed modulation method, or a high-speed service modulator with a low-speed modulation method (such as an MZ modulator), and the like, and the manner in which the tag signal information is solved.
  • the fast Fourier transform (FFT) algorithm can be used to find the frequency of each tag signal from the wavelength of the light and parse the tag signal information.
  • the tag signal is loaded by using frequency shift keying (FSK) or amplitude shift keying (ASK) to modulate the label signal to the wavelength, and demodulation is performed at the receiving end by using an FFT algorithm or the like to detect the wavelength.
  • FSK frequency shift keying
  • ASK amplitude shift keying
  • Label signal frequency and tag signal information The label signal modulation basically adopts a method in which one wavelength corresponds to one or several different label signal frequencies, so that when the number of wavelengths in the optical network is large, more label signal frequencies are needed, which is not conducive to the label signal solution at the receiving end. Reconciliation tag signal information identification. Summary of the invention
  • the main object of the present invention is to provide a method and system for implementing an optical tag, which can solve the problem that the receiving end demodulates the tag signal and identifies the tag signal information due to the use of more tag signal frequencies.
  • the invention provides a method for implementing an optical label, the method comprising:
  • the optical network is divided into domains according to a reconfigurable optical add/drop multiplexer (ROADM) node, and one or more tag signal frequencies are allocated for each domain;
  • ROADM reconfigurable optical add/drop multiplexer
  • the assigned tag signal frequencies are passed between ROADM nodes and/or between wavelengths within the ROADM node according to preset time-sharing rules;
  • the wavelength transmits a tag signal using the transmitted tag signal frequency.
  • the time-sharing rule includes a time-sharing order and a time-sharing mode.
  • the time-sharing order includes: a time-sharing order of ROADM nodes and/or a time-sharing order of wavelengths within a ROADM node.
  • the time-sharing delivery method includes: a token delivery mode and/or a time slice delivery mode.
  • the token delivery manner includes: transmitting, by means of an insertion information in an OSC channel or a label channel or a data channel or a management in a node, a token corresponding to a label signal frequency between ROADM nodes and/or between wavelengths within a ROADM node; After the wavelength receives the token, the tag signal is transmitted using the corresponding tag signal frequency.
  • the time slice transfer mode includes: allocating a fixed time slice for each wavelength in each ROADM node in the domain, and transmitting the tag signal on the respective fixed time slices using the transmitted tag signal frequency.
  • the information carried by the label signal includes at least one of the following: the wavelength information, the ROADM node where the sender is located, the domain in which it is located, and the destination ROADM node.
  • Transmitting the tag signal using the transmitted tag signal frequency includes: superimposing a low frequency sinusoidal modulated signal on the tag signal frequency as the tag signal.
  • the invention also provides an implementation system for an optical label, the system comprising:
  • a setting module configured to divide an optical network into domains according to ROADM nodes, and allocate one or more label signal frequencies to each domain;
  • a delivery module configured to, in each domain, transmit the assigned tag signal frequency between the ROADM nodes and/or between the wavelengths within the ROADM node according to a preset time-sharing rule
  • the time-sharing rule includes a time-sharing order and a time-sharing mode.
  • the time-sharing order includes: a time-sharing order of ROADM nodes and/or a time-sharing order of wavelengths within a ROADM node.
  • the time-sharing delivery method includes: a token delivery mode and/or a time slice delivery mode.
  • the delivery module is further configured to use the insertion information in the OSC channel or the label channel or the data channel or the management in the node to pass the token corresponding to the label signal frequency between the ROADM nodes and/or Or pass between wavelengths within a ROADM node;
  • the wavelength sending module is further configured to: after receiving the token, send the label signal by using a corresponding label signal frequency.
  • the delivery module is further configured to allocate a fixed time slice for each wavelength in each ROADM node in the domain when the time slice transfer mode is adopted;
  • the wavelength transmitting module is further configured to send the label signal by using the transmitted label signal frequency on respective fixed time slices of the wavelength.
  • the method and system for implementing the optical label of the present invention by dividing the optical network into domains and assigning one or more label signal frequencies to each domain, in each domain, assigning the assigned label signal frequency according to a preset time division
  • the rules are passed between ROADM nodes and/or between wavelengths within the ROADM node; the wavelength transmits the tag signal using the transmitted tag signal frequency, thus achieving multiple wavelengths
  • the frequency of the tag signal is shared according to the order of transmission, so that the tag signal transmission of more wavelengths can be realized by the frequency of the tag signal, which reduces the requirement of the tag frequency of the system and facilitates the extraction of the tag signal.
  • FIG. 1 is a flow chart of a method for implementing an optical tag according to the present invention
  • FIG. 2 is a schematic diagram of domain division of an optical network
  • FIG. 3 shows the structure of a ROADM node.
  • the method for implementing the optical tag of the present invention mainly uses a plurality of wavelengths in the optical network to use the frequency of the tag signal in turn to transmit the relevant information of the wavelength. As shown in Figure 1, it includes:
  • Step 101 Divide the optical network according to the ROADM node, and assign one or more label signal frequencies to each domain.
  • Step 102 In each domain, the assigned tag signal frequency is transmitted between the ROADM nodes and/or between the wavelengths within the ROADM node according to a preset time-sharing rule.
  • Step 103 The wavelength transmits the tag signal by using the transmitted tag signal frequency.
  • the optical network is divided into domains according to the ROADM node, and the manner of dividing the optical network may be based on the IP address of the ROADM node, or the distance between the ROADM nodes, or the number of uplink and downlink wavelengths included in the ROADM node;
  • Each domain contains one or more ROADM nodes;
  • each ROADM node contains one or more wavelengths.
  • By assigning one or more tag signal frequencies to each domain multiple wavelengths in a domain share the assigned one or more tag signal frequencies.
  • each OTU connection of the uplink and the downlink corresponds to one wavelength
  • the ROADM node includes a total of k wavelengths, ⁇ 1 ⁇ , and ⁇ represents the number of the domain in which the ROADM node is located.
  • tag signal frequency in each domain, it is passed between ROADM nodes and/or between wavelengths within the ROADM node according to preset time-sharing rules.
  • Time-sharing rules include: Time-sharing order and time-sharing.
  • it may be set according to the number of the ROADM node in the domain, or may be set according to the number of wavelengths included in the ROADM node, or may be set according to the IP address of the ROADM node, and of course, other setting manners may be needed according to requirements. , as long as the order of time-sharing of the ROADM nodes is specified;
  • it may be set according to the size of the wavelength, or may be set according to the service type corresponding to the wavelength, or may be set according to the number of the wavelength.
  • other setting manners may be provided as needed, as long as the wavelength time-sharing is specified. The order can be.
  • Second, for time-sharing delivery methods including:
  • token delivery mode such as the insertion of information in the OSC (Optical Monitoring) channel or the label channel or the data channel or the management within the node, the token corresponding to the label signal frequency between the ROADM nodes and/or at the ROADM node Transfer between wavelengths within.
  • OSC Optical Monitoring
  • the token corresponding to the label signal frequency between the ROADM nodes and/or at the ROADM node Transfer between wavelengths within.
  • the label signal is sent through the corresponding label signal frequency. After the label signal is sent, the label signal frequency is released, and the token is transmitted to the next wavelength in the time-sharing order; if the wavelength is At the last wavelength of the ROADM node, the ROADM node releases the label signal frequency and passes the token to the next ROADM node in a time-sharing order.
  • the token is time-divisionally based on the wavelength. Passing the order to the first wavelength below it;
  • the time slice transmission mode is specifically: assigning a fixed time slice, that is, a fixed time period, to each wavelength in each ROADM node in the domain, and using the transmitted label signal on the respective fixed time slices. frequency.
  • the wavelength transmits the tag signal on the fixed time slice using the tag signal frequency.
  • the wavelength releases the frequency of the tag signal, according to the time-sharing order of the wavelength, the next wavelength is in the The corresponding label signal frequency is used on the fixed time slice; if the wavelength is the last wavelength of the ROADM node, the ROADM node releases the label signal frequency, according to the time-sharing order of the ROADM node, the next ROADM node according to the wavelength it contains
  • the time-sharing order controls its first wavelength to transmit the tag signal on its fixed-time slice using the tag signal frequency.
  • time-sharing mode can be used between ROADM nodes and between wavelengths, and different time-sharing modes can also be used.
  • the transmission of the tag signal frequency between wavelengths is controlled by the associated ROADM node or by the upper management unit of the domain; the transmission of the tag signal frequency between the ROADM nodes is controlled by the upper management unit of the domain.
  • the label signal information sent by the wavelength includes at least one of the following: the wavelength information, the ROADM node where the sending end is located, the domain in which it is located, and the destination ROADM node.
  • a small amplitude low frequency sinusoidal modulated signal is superimposed on the label signal frequency as a label signal.
  • 4 ⁇ Set up three domains in the optical network, taking one of the domains as an example. 4 ⁇ is set to allocate 2 tag signal frequencies to the domain, denoted as Fl and F2; the domain contains 3 ROADM nodes, numbered as 1, 2, 3; ROADM node 1 wavelengths are: ⁇ 11 ⁇ ⁇ 14; ROADM node 2 wavelengths are: XI 1; ROADM node 3 wavelengths are: ⁇ 31 ⁇ ⁇ 34.
  • Time-sharing order The time-sharing order of ROADM nodes set according to the ROADM node number is: ROADM node l ⁇ ROADM node 2; the wavelength-time-sharing order in the ROADM node 1 set according to the wavelength number is: ⁇ 11 ⁇ 12 ⁇ 13 ⁇ 14; Since the ROADM node 2 only contains one wavelength ⁇ 21, there is no need to set the time-sharing order of the wavelengths;
  • Time-sharing mode It is set to be transmitted as a token between ROADM nodes and between wavelengths.
  • Time-sharing order If F2 is only used for ROADM node 3, there is no need to set the time-sharing order of ROADM nodes; the wavelength-time-sharing order in ROADM node 3 that can be set according to the wavelength is: ⁇ 34 ⁇ 32 ⁇ ⁇ 31 ⁇ 33;
  • Time-sharing mode When setting the time-slice method between wavelengths, it is necessary to assign a fixed time slice to each of ⁇ 31 ⁇ 34 in advance.
  • the upper management unit of the domain allocates F1 to the ROADM node 1 at a certain time, and sends the token corresponding to F1 to the ROADM node 1; the ROADM node 1 follows the order of ⁇ 11 ⁇ 12 ⁇ 13 ⁇ 14 First, the token is passed to the wavelength ⁇ ⁇ ; after receiving the token, the wavelength ⁇ ⁇ transmits the label signal through F1, and after completion, releases F1, and transmits the token in the order of ⁇ 11 ⁇ 12 ⁇ 13 ⁇ 14; After the wavelength signal ⁇ 14 has sent the label signal, the ROADM node 1 releases F1 and passes the token to the ROADM node 2; the ROADM node 2 passes the token to the wavelength ⁇ 21, and after the transmission of the label signal is completed, the ROADM node 2 releases the F1.
  • the upper management unit re-assigns F1 to the ROADM node 1 at a certain time according to the setting, and repeats the above process.
  • the upper management unit of the domain allocates F2 to the ROADM node 3 at a certain time; the ROADM node 3 can control ⁇ 34 ⁇ 32 ⁇ 31 ⁇ 33 in the order of ⁇ 34 ⁇ 32 ⁇ 31 ⁇ 33.
  • F2 is used to transmit the tag signal on the fixed-time chip. Regardless of whether the tag signal is transmitted at this wavelength, F2 will be released for the next wavelength as long as the fixed time slice expires.
  • the present invention also provides an implementation system for an optical tag, the system comprising:
  • a setting module configured to divide an optical network into domains according to ROADM nodes, and allocate one or more label signal frequencies to each domain;
  • a delivery module configured to, in each domain, transmit the assigned tag signal frequency between the ROADM nodes and/or between the wavelengths within the ROADM node according to a preset time-sharing rule
  • the wavelength transmitting module is configured to send the label signal by using the transmitted label signal frequency.
  • the time-sharing rules include the time-sharing order and the time-sharing method.
  • the time-sharing order includes: a time-sharing order of ROADM nodes and/or a time-sharing order of wavelengths within a ROADM node.
  • Time-sharing methods include: token delivery method and / or time slice delivery method.
  • the delivery module is also used to transmit the token corresponding to the tag signal frequency between the ROADM node and/or the ROADM node through the insertion information in the OSC channel or the tag channel or the data channel or the management within the node when the token passing mode is used. Transfer between wavelengths;
  • the wavelength sending module is further configured to send the tag signal by using a corresponding tag signal frequency after receiving the token.
  • the delivery module is further configured to allocate a fixed time slice for each wavelength in each ROADM node in the domain when using the time slice transfer mode;
  • the wavelength transmitting module is further configured to send the label signal by using the transmitted label signal frequency on respective fixed time slices of the wavelength.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

本发明公开了一种光标签的实现方法，包括：将光网络按照可重构光分插复用器（ROADM）节点进行域划分，并为每个域分配一个或多个标签信号频率；在每个域中，将分配的标签信号频率按照预设的分时规则在ROADM节点间和/或在ROADM节点内的波长间传递；波长使用传递的标签信号频率发送标签信号。本发明还公开了一种光标签的实现系统，本发明的方案，可以通过较少的标签信号频率，实现较多波长数的标签信号传输的目的，既减少了系统对标签频率的要求，也有利于标签信号的提取。

Description

一种光标签的实现方法和系统 技术领域
本发明涉及光通信网络， 特别是指一种光标签的实现方法和系统。 背景技术
随着波分复用 （WDM, Wavelength Division Multiplex ) 的发展， 当前 的光通信网络可在同一根光纤中同时传输不同波长的多个光信号或光信 道， 而且基于可重构光分插复用器 （ROADM , Reconfigurable Optical Add-Drop Multiplexer ) 的技术方便了光通信中各个波长的按需配置， 使得 光网络中的波长在两个站点之间并非总是经过同样的路径， 或者某波长也 并非总是分配给恒定的两个站点。
为了进行网络拓朴识别和光信道探测， 可以在光网络中的波长上叠加 一个低频的标签信号， 同时在网络中的各节点上识别光通道中的标签信号， 通过解出标签信号信息（即标签信号携带的信息）， 得到波长在网络中的传 输路径和波长的相关信息。 加载标签信号的方式包括使用电可调光衰减器、 带有低速调制方式的光发射器或带有低速调制方式的高速业务调制器（如 MZ调制器）等； 而解出标签信号信息的方式可使用快速傅立叶变换（ FFT， Fast Fourier Transform ) 算法， 从光波长中发现各标签信号频率， 并解析出 标签信号信息。
当前， 标签信号的加载是利用频移键控 ( FSK )或幅移键控 ( ASK )等 方式将标签信号调制到波长上， 而解调则是在接收端利用 FFT算法等检测 出波长中的标签信号频率和标签信号信息。 标签信号调制基本采用一个波 长对应 1 个或几个不同的标签信号频率的方式， 这样， 当光网络中的波长 数量较多时， 需要使用较多的标签信号频率， 不利于接收端的标签信号解 调和标签信号信息识别。 发明内容
有鉴于此， 本发明的主要目的在于提供一种光标签的实现方法和系统， 能够解决由于使用较多的标签信号频率导致的不利于接收端解调标签信号 和识别标签信号信息的问题。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供了一种光标签的实现方法， 该方法包括：
将光网络按照可重构光分插复用器（ROADM )节点进行域划分， 并为 每个域分配一个或多个标签信号频率；
在每个域中， 将分配的标签信号频率按照预设的分时规则在 ROADM 节点间和 /或在 ROADM节点内的波长间传递；
所述波长使用所述传递的标签信号频率发送标签信号。
其中， 所述分时规则包括分时传递顺序和分时传递方式。
所述分时传递顺序包括： ROADM节点的分时传递顺序和 /或 ROADM 节点内波长的分时传递顺序。
所述分时传递方式包括： 令牌传递方式和 /或时间片传递方式。
所述令牌传递方式包括： 通过 OSC通道或标签通道或数据通道内的插 入信息或节点内的管理将标签信号频率对应的令牌在 ROADM节点间和 /或 在 ROADM节点内的波长间传递； 波长接收到令牌后， 使用对应的标签信 号频率发送标签信号。
所述时间片传递方式包括： 为域中的每个 ROADM节点中的每个波长 分配一个固定的时间片， 波长在各自的固定时间片上使用传递的标签信号 频率发送标签信号。
所述标签信号携带的信息包括以下至少一种： 本波长信息、 发送端所 在的 ROADM节点以及所在的域、 和目的 ROADM节点。 使用传递的标签信号频率发送标签信号， 包括： 在标签信号频率上叠 加一低频正弦调制信号作为标签信号。
本发明还提供了一种光标签的实现系统， 该系统包括：
设置模块， 用于将光网络按照 ROADM节点进行域划分， 并为每个域 分配一个或多个标签信号频率；
传递模块， 用于在每个域中， 将分配的标签信号频率按照预设的分时 规则在 ROADM节点间和 /或在 ROADM节点内的波长间传递；
波长发送模块， 用于使用所述传递的标签信号频率发送标签信号。 其中， 所述分时规则包括分时传递顺序和分时传递方式。
所述分时传递顺序包括： ROADM节点的分时传递顺序和 /或 ROADM 节点内波长的分时传递顺序。
所述分时传递方式包括： 令牌传递方式和 /或时间片传递方式。
所述传递模块， 还用于采用所述令牌传递方式传递时， 通过 OSC通道 或标签通道或数据通道内的插入信息或节点内的管理将标签信号频率对应 的令牌在 ROADM节点间和 /或在 ROADM节点内的波长间传递；
相应的， 所述波长发送模块， 还用于接收到令牌后， 使用对应的标签 信号频率发送标签信号。
所述传递模块， 还用于采用所述时间片传递方式时， 为域中的每个 ROADM节点中的每个波长分配一个固定的时间片；
相应的， 所述波长发送模块， 还用于在波长各自的固定时间片上使用 传递的标签信号频率发送标签信号。
本发明光标签的实现方法和系统， 通过将光网络进行域划分， 并为每 个域分配一个或多个标签信号频率， 在每个域中， 将分配的标签信号频率 按照预设的分时规则在 ROADM节点间和 /或在 ROADM节点内的波长间传 递； 波长使用传递的标签信号频率发送标签信号， 如此就实现了多个波长 按照传递顺序共用标签信号频率， 这样， 通过较少的标签信号频率， 就可 实现较多波长数的标签信号传输的目的， 既减少了系统对标签频率的要求， 也有利于标签信号的提取。 附图说明
图 1为本发明光标签的实现方法流程图；
图 2为光网络的域划分示意图；
图 3为 ROADM节点的结构示意图。 具体实施方式
本发明光标签的实现方法， 主要是使光网络中的多个波长分时轮流使 用标签信号频率， 来传递本波长的相关信息。 如图 1所示， 包括：
步驟 101 , 将光网络按照 ROADM节点进行域划分， 并为每个域分配 一个或多个标签信号频率。
步驟 102,在每个域中， 将分配的标签信号频率按照预设的分时规则在 ROADM节点间和 /或在 ROADM节点内的波长间传递。
步驟 103 , 波长使用传递的标签信号频率发送标签信号。
下面结合图 2和图 3说明本发明的方案。
如图 2所示， 将光网络按照 ROADM节点进行域划分， 划分的方式可 以基于 ROADM节点的 IP地址、 或 ROADM节点之间距离的远近、 或者 ROADM 节点包含的上下路波长的个数来划分； 每个域包含有一个或多个 ROADM节点； 每个 ROADM节点包含一个或多个波长。 为每个域分配一 个或多个标签信号频率， 则一个域中的多个波长分时共用所分配的一个或 多个标签信号频率。 所谓分时是指： 一个标签信号频率在同一时间只能被 一个 ROADM节点的一个波长使用。
如图 3所示， 为一个 ROADM节点， 包括 1个光分插复用器， 2个维 度的出光、 入光连接， k个上下路的 OTU连接。 其中， 每个上下路的 OTU 连接分别对应一个波长， 则该 ROADM节点共包含 k个波长， λη1~λιΛ, η 表示此 ROADM节点所在的域中的编号。
对于某一个标签信号频率， 在每个域中， 按照预设的分时规则在 ROADM节点间和 /或在 ROADM节点内的波长间传递。
分时规则包括： 分时传递顺序和分时传递方式。
一、 对于分时传递顺序， 包括：
1、 ROADM节点的分时传递顺序；
具体的， 可以根据 ROADM 节点在域内的编号设定， 也可以根据 ROADM节点包含的波长个数设定，也可以根据 ROADM节点的 IP地址等 设定， 当然， 根据需要还可以有其他设定方式， 只要规定了 ROADM节点 分时传递的顺序即可；
2、 ROADM节点内波长的分时传递顺序；
具体的， 可以按照波长的大小设定， 也可以按照波长对应的业务类型 设定， 也可以按照波长的编号设定， 当然， 根据需要还可以有其他设定方 式， 只要规定了波长分时传递的顺序即可。
二、 对于分时传递方式， 包括：
方式 1、 令牌传递方式， 如可以通过 OSC (光监控）通道或标签通道 或数据通道内的插入信息或节点内的管理将标签信号频率对应的令牌在 ROADM节点间和 /或在 ROADM节点内的波长间传递。
此种情况下， 波长接收到令牌时通过对应的标签信号频率发送标签信 号， 发送完标签信号后， 释放标签信号频率， 将令牌按照分时传递顺序传 递给下一个波长； 如果该波长为本 ROADM 节点的最后一个波长， 则本 ROADM 节点释放掉标签信号频率， 将令牌按照分时传递顺序传递给下一 个 ROADM节点； ROADM节点接收到令牌时， 将该令牌按照波长的分时 传递顺序传递给其下第一个波长；
方式 2、 时间片传递方式， 具体为： 为域中的每个 ROADM节点中的 每个波长分配一个固定的时间片、 即一个固定的时间段， 波长在各自的固 定时间片上使用传递的标签信号频率。
此种情况下， 本波长在其固定时间片上使用标签信号频率发送标签信 号， 当本波长使用的时间到达时， 该波长释放该标签信号频率， 按照波长 的分时传递顺序， 下一个波长在其固定时间片上使用对应的标签信号频率； 如果该波长为本 ROADM节点的最后一个波长， 则本 ROADM节点释放该 标签信号频率， 按照 ROADM节点的分时传递顺序， 下一个 ROADM节点 按照其包含的波长的分时传递顺序控制其第一个波长在其固定时间片上使 用该标签信号频率发送标签信号。
另外， ROADM 节点间和波长间可同时采用相同的分时传递方式， 也 可以采用不同的分时传递方式。
需要指出的是， 标签信号频率在波长间的传递， 由所属的 ROADM节 点控制， 或者由该域的上层管理单元控制； 标签信号频率在 ROADM节点 间的传递， 由该域的上层管理单元控制。
其中， 波长发送的标签信号信息包括以下至少一种： 本波长信息、 发 送端所在的 ROADM节点以及所在的域、 和目的 ROADM节点等。
具体的， 在标签信号频率上叠加一小幅度的低频正弦调制信号作为标 签信号。
如此， 通过较少的标签信号频率， 就可实现较多波长数的标签信号传 输的目的， 既减少了系统对标签频率的要求， 也有利于标签信号的提取。
下面通过具体的实施例来说明本发明的方案。
4叚设光网络中划分了三个域， 以其中一个域为例， 4叚设为该域分配了 2 个标签信号频率， 记为 Fl、 F2; 该域包含 3个 ROADM节点， 编号分别为 1、 2、 3; ROADM节点 1的波长有： λ11~λ14; ROADM节点 2的波长有： XI 1； ROADM节点 3的波长有： λ31 ~λ34。
对于标签信号频率 F1 , 设定分时规则， 包括：
分时传递顺序： 按照 ROADM节点编号设定的 ROADM节点的分时传 递顺序为： ROADM节点 l→ROADM节点 2;按照波长编号设定的 ROADM 节点 1 内的波长分时传递顺序为： λ11→λ12→λ13→λ14; 由于 ROADM节 点 2只包含一个波长 λ21 , 则无需设置波长的分时传递顺序；
分时传递方式： 设定在 ROADM节点间和波长间均按照令牌的方式传 递。
对于标签信号频率 F2, 设定分时规则， 包括：
分时传递顺序：设定 F2只为 ROADM节点 3使用，则无需设置 ROADM 节点的分时传递顺序； 可按照波长的大小设定的 ROADM节点 3内的波长 分时传递顺序为： λ34→λ32→λ31→λ33;
分时传递方式： 设定在波长间按照时间片方式传递， 则需要预先为 λ31~λ34各分配一个固定的时间片。
那么， 该域中分时使用标签信号频率 Fl、 F2的情况如下：
对于标签信号频率 F1 ,该域的上层管理单元在某一个时刻将 F1分配给 ROADM节点 1 , 并将 F1对应的令牌发送给 ROADM节点 1 ; ROADM节 点 1按照 λ11→λ12→λ13→λ14的顺序， 首先将该令牌传递给波长 λΐ ΐ ; 波 长 λΐ ΐ接收到令牌后， 通过 F1发送标签信号， 完成后， 释放掉 F1 , 并将令 牌按照 λ11→λ12→λ13→λ14的顺序传递；直到波长 λ14发送完标签信号后， ROADM节点 1释放掉 F1 , 并将令牌传递给 ROADM节点 2; ROADM节 点 2将该令牌传递给波长 λ21 , 发送标签信号完成后， ROADM节点 2释放 掉 F1。之后，上层管理单元根据设置在某一个时刻重新将 F1分配给 ROADM 节点 1 , 重复上述过程。 对于标签信号频率 F2,该域的上层管理单元在某一个时刻将 F2分配给 ROADM节点 3; ROADM节点 3可按照 λ34→λ32→λ31→λ33的顺序， 以 此控制 λ34→λ32→λ31→λ33在各自固定时间片上使用 F2发送标签信号， 不管本波长发送标签信号是否完成， 只要固定时间片到时， 都将释放 F2, 供下一个波长使用。
为了实现上述方法， 本发明还提供了一种光标签的实现系统， 该系统 包括：
设置模块， 用于将光网络按照 ROADM节点进行域划分， 并为每个域 分配一个或多个标签信号频率；
传递模块， 用于在每个域中， 将分配的标签信号频率按照预设的分时 规则在 ROADM节点间和 /或在 ROADM节点内的波长间传递；
波长发送模块， 用于使用传递的标签信号频率发送标签信号。
其中， 分时规则包括分时传递顺序和分时传递方式。
分时传递顺序包括： ROADM节点的分时传递顺序和 /或 ROADM节点 内波长的分时传递顺序。
分时传递方式包括： 令牌传递方式和 /或时间片传递方式。
传递模块， 还用于采用令牌传递方式传递时， 通过 OSC通道或标签通 道或数据通道内的插入信息或节点内的管理将标签信号频率对应的令牌在 ROADM节点间和 /或在 ROADM节点内的波长间传递；
相应的， 波长发送模块， 还用于接收到令牌后， 使用对应的标签信号 频率发送标签信号。
传递模块， 还用于采用时间片传递方式时， 为域中的每个 ROADM节 点中的每个波长分配一个固定的时间片；
相应的， 波长发送模块， 还用于在波长各自的固定时间片上使用传递 的标签信号频率发送标签信号。 以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种光标签的实现方法， 其特征在于， 该方法包括：
将光网络按照可重构光分插复用器 ROADM节点进行域划分， 并为每 个域分配一个或多个标签信号频率；
在每个域中， 将分配的标签信号频率按照预设的分时规则在 ROADM 节点间和 /或在 ROADM节点内的波长间传递；
所述波长使用所述传递的标签信号频率发送标签信号。
2、 根据权利要求 1所述光标签的实现方法， 其特征在于， 所述分时规 则包括分时传递顺序和分时传递方式。
3、 根据权利要求 2所述光标签的实现方法， 其特征在于， 所述分时传 递顺序包括： ROADM节点的分时传递顺序和 /或 ROADM节点内波长的分 时传递顺序。
4、 根据权利要求 2所述光标签的实现方法， 其特征在于， 所述分时传 递方式包括： 令牌传递方式和 /或时间片传递方式。
5、 根据权利要求 4所述光标签的实现方法， 其特征在于， 所述令牌传 递方式包括： 通过光监控 OSC通道或标签通道或数据通道内的插入信息或 节点内的管理将标签信号频率对应的令牌在 ROADM 节点间和 /或在 ROADM 节点内的波长间传递； 波长接收到令牌后， 使用对应的标签信号 频率发送标签信号。
6、 根据权利要求 4所述光标签的实现方法， 其特征在于， 所述时间片 传递方式包括： 为域中的每个 ROADM节点中的每个波长分配一个固定的 时间片， 波长在各自的固定时间片上使用传递的标签信号频率发送标签信
7、 根据权利要求 1至 6任一项所述光标签的实现方法， 其特征在于， 所述标签信号携带的信息包括以下至少一种： 本波长信息、 发送端所在的 ROADM节点以及所在的域、 和目的 ROADM节点。
8、 根据权利要求 1至 6任一项所述光标签的实现方法， 其特征在于， 所述使用传递的标签信号频率发送标签信号， 包括： 在标签信号频率上叠 加一低频正弦调制信号作为标签信号。
9、 一种光标签的实现系统， 其特征在于， 该系统包括：
设置模块， 用于将光网络按照 ROADM节点进行域划分， 并为每个域 分配一个或多个标签信号频率；
传递模块， 用于在每个域中， 将分配的标签信号频率按照预设的分时 规则在 ROADM节点间和 /或在 ROADM节点内的波长间传递；
波长发送模块， 用于使用所述传递的标签信号频率发送标签信号。
10、 根据权利要求 9所述光标签的实现系统， 其特征在于， 所述分时 规则包括分时传递顺序和分时传递方式。
11、 根据权利要求 10所述光标签的实现系统， 其特征在于， 所述分时 传递顺序包括： ROADM节点的分时传递顺序和 /或 ROADM节点内波长的 分时传递顺序。
12、 根据权利要求 10所述光标签的实现系统， 其特征在于， 所述分时 传递方式包括： 令牌传递方式和 /或时间片传递方式。
13、 根据权利要求 12所述光标签的实现系统， 其特征在于， 所述传递模块， 还用于采用所述令牌传递方式传递时， 通过 OSC通道 或标签通道或数据通道内的插入信息或节点内的管理将标签信号频率对应 的令牌在 ROADM节点间和 /或在 ROADM节点内的波长间传递；
相应的， 所述波长发送模块， 还用于接收到令牌后， 使用对应的标签 信号频率发送标签信号。
14、 根据权利要求 12所述光标签的实现系统， 其特征在于， 所述传递模块， 还用于采用所述时间片传递方式时， 为域中的每个 ROADM节点中的每个波长分配一个固定的时间片；
相应的， 所述波长发送模块， 还用于在波长各自的固定时间片上使用 传递的标签信号频率发送标签信号。
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KR101548069B1 (ko) 2015-08-27
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