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WO2015106577A1 - 将otn信号转换为以太网净荷的方法及系统 - Google Patents

将otn信号转换为以太网净荷的方法及系统 Download PDF

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Publication number
WO2015106577A1
WO2015106577A1 PCT/CN2014/086803 CN2014086803W WO2015106577A1 WO 2015106577 A1 WO2015106577 A1 WO 2015106577A1 CN 2014086803 W CN2014086803 W CN 2014086803W WO 2015106577 A1 WO2015106577 A1 WO 2015106577A1
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Prior art keywords
signal
ethernet
flex
odu0
length
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PCT/CN2014/086803
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English (en)
French (fr)
Inventor
周志强
刘怀明
吕建新
柳光全
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烽火通信科技股份有限公司
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Priority to RU2016100224A priority Critical patent/RU2649954C2/ru
Publication of WO2015106577A1 publication Critical patent/WO2015106577A1/zh

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    • 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]
    • H04L12/40—Bus networks
    • H04L12/407—Bus networks with decentralised control
    • H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
    • 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]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone
    • H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge

Definitions

  • the present invention relates to the field of communications, and in particular to a method and system for converting an OTN signal into an Ethernet payload.
  • the current data transmission platform requires the capability of multi-service bearer and transmission required by the POTN (Packet Enhanced Optical Transport Network) standard.
  • the TDM service interface can be further divided into SDH (Synchronous Digital Hierarchy), PDH (Plesiochronous Digital Hierarchy), and OTN (Optical Transport Network). Since the traditional data transmission platform is partially based on the Ethernet packet-based distributed switching architecture (not the cell), the architecture naturally supports the Ethernet data interface.
  • SDH interface and the PDH interface such as the E1, CEP (SDH Circuit Emulation over) is adopted respectively.
  • Packet, packet network bearer SDH circuit emulation) or pseudowire emulation technology to implement data packet-based distributed switching architecture data equipment for TDM service transmission, but for large bandwidth service interfaces such as OTN, based on Ethernet packet distributed switching architecture data devices to transmit, there is no uniform technical standards to regulate and guide.
  • the object of the present invention is to overcome the deficiencies of the above background art and to provide a method and system for converting an OTN signal into an Ethernet payload, which can convert an OTN signal into Ethernet payload, which regards the switching platform based on the Ethernet switching architecture as a unified switching platform, and provides the transmission capability of the OTN service interface for the traditional Ethernet packet-based distributed switching architecture data device, enabling the traditional Ethernet-based packet.
  • the distributed switching architecture data device has the capability of multi-service bearer and transmission in accordance with the requirements of the POTN device standard, and prolongs the life cycle of such devices.
  • the present invention provides a method of converting an OTN signal into an Ethernet payload, comprising the steps of:
  • each received OTN signal into any combination of 6 signals ODU0/1/2/3/4/flex, and each ODUk0/1/2/3/4/flex signal corresponds to one of interlaken Channel; then the ODUk0/1/2/3/4/flex signal is sent to the slice and the aggregate SAR module; the SAR module is used to: continuously transmit the ODU0/1/2/3/4/flex signal according to the system requirements at the transmitting end
  • the length is cut into fixed-length slices, and the corresponding channel number and management packet are added, and the interlaken signal is encapsulated; the slice is restored from the interlaken signal at the receiving end, and the slice is re-aggregated to generate a continuous corresponding ODU0/1/ 2/3/4/flex signal;
  • the encapsulated Ethernet frame is sent to the peer end through the Ethernet frame-based switching network, and the peer end recovers the Ethernet frame from the payload of the Ethernet frame through the Ethernet identifier in the Ethernet frame.
  • the recovered interlaken signal is sent to the SAR module;
  • the SAR module reassembles the fixed packet length data slice loaded in the corresponding channel payload into the corresponding ODU0/1/2/3/4/flex signal in the original order, and the multiplexing module will ODU0/1/2/3/
  • the 4/flex signal is multiplexed into a complete OTN signal according to the corresponding time slot arrangement.
  • the frame of the interlaken signal includes a burst control word, a sequence number, a time stamp, and an ODU0/1/2/3/4/flex slice, wherein the length of the burst control word is 64 bits.
  • the length of the sequence number is 16 bits
  • the length of the time stamp is 32 bits
  • the length of the ODU0/1/2/3/4/flex slice is fixed, which is determined according to system requirements, wherein 8 bits in the burst control word
  • the channel number corresponds to the slot number of ODU0/1/2/3/4/flex in OTN.
  • the Ethernet identifier is a virtual local area network (VLAN) or a multi-protocol label switching MPLS.
  • the Ethernet frame with the VLAN identifier encapsulated by the interlaken signal includes a source address, a destination address, a label protocol identifier TPID/VLAN, a burst control word, a sequence number, a time stamp, and an ODU0/ 1/2/3/4/flex slice and frame check sequence FCS, wherein the TPID is represented by a hexadecimal value of 0x8100, and the VLAN value corresponds to the channel number in the burst control word byte, and the burst control word
  • the length is 64 bits
  • the length of the serial number is 16 bits
  • the length of the time stamp is 32 bits
  • the length of the ODU0/1/2/3/4/flex slice is fixed, which is determined according to system requirements, where burst control
  • the 8-bit channel number in the word corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN; the encapsulated Ethernet frame passes through the Ethernet-based switching fabric data device, unicast
  • the Ethernet frame with the MPLS identifier encapsulated by the interlaken signal includes a source address, a destination address, a control word, an Ethernet frame type Ethertype/label switching path LSP/pseudo line PW, and burst control.
  • the length of the burst control word is 64 bits
  • the length of the sequence number is 16 bits
  • the length of the time stamp is 32 bits
  • the length of the ODU0/1/2/3/4/flex slice is fixed, according to the system. It is necessary to determine that the 8-bit channel number in the burst control word corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN; the encapsulated Ethernet frame passes the Ethernet-based switching fabric data device.
  • the unicast, multicast, and broadcast forwarding behaviors are all determined by the destination address; the encapsulated Ethernet frames are arbitrarily exchanged in the Ethernet packet-based distributed switching fabric data device, and are exchanged to any single disk in the device. / Any port.
  • the present invention also provides a system for converting an OTN signal into an Ethernet payload for implementing the above method, including a decomposition module, a SAR module, an Ethernet frame encapsulation module, an Ethernet frame transmission module, an interlaken signal recovery module, and a multiplexing module. among them:
  • the decomposition module is configured to: decompose each received OTN signal into any combination of 6 signals of ODU0/1/2/3/4/flex, each ODUk0/1/2/3/4/flex The signals correspond to one channel of interlaken; then the ODUk0/1/2/3/4/flex signal is sent to the SAR module;
  • the SAR module is configured to: cut a continuous ODU0/1/2/3/4/flex signal into a fixed length slice according to a required length of the system at the transmitting end, and add a corresponding channel number and a management packet, and package Into the interlaken signal; at the receiving end from the interlaken signal to reduce the slice, and re-aggregate the slice to generate a continuous corresponding ODU0/1/2/3/4/flex signal;
  • the Ethernet frame encapsulating module is configured to: encapsulate the interlaken signal of each channel as an payload into an Ethernet frame, and mark the Ethernet identifier of the corresponding Ethernet frame for the interlaken payload of each channel as needed;
  • the Ethernet frame sending module is configured to: send the encapsulated Ethernet frame to the interlaken signal recovery module of the peer end by using an Ethernet frame-based switching network;
  • the interlaken signal recovery module for: passing Ethernet in an Ethernet frame Identifying, recovering the interlaken signal of the corresponding channel of the Ethernet frame from the payload of the Ethernet frame, and sending the recovered interlaken signal to the SAR module; the SAR module corresponding to the fixed packet length data loaded in the channel payload The slices are recomposed into the corresponding ODU0/1/2/3/4/flex signals in the original order;
  • the multiplexing module is configured to: multiplex the ODU0/1/2/3/4/flex signal into a complete OTN signal according to a corresponding time slot arrangement.
  • the frame of the interlaken signal includes a burst control word, a sequence number, a time stamp, and an ODU0/1/2/3/4/flex slice, wherein the length of the burst control word is 64 bits.
  • the length of the serial number is 16 bits
  • the length of the time stamp is 32 bits
  • the length of the ODU0/1/2/3/4/flex slice is fixed, and the length is determined according to system requirements, wherein 8 of the burst control words
  • the bit channel number corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN.
  • Ethernet identifier is VLAN or MPLS.
  • the Ethernet frame with the VLAN identifier encapsulated by the interlaken signal includes a source address, a destination address, a TPID/VLAN, a burst control word, a sequence number, a time stamp, and an ODU0/1/2/ 3/4/flex slice and FCS, where the TPID is represented by a hexadecimal value of 0x8100, the VLAN value corresponds to the channel number in the burst control word byte, and the burst control word has a length of 64 bits, and the serial number is The length is 16 bits, the length of the time stamp is 32 bits, and the length of the ODU0/1/2/3/4/flex slice is fixed, which is determined according to system requirements, wherein the 8-bit channel number in the burst control word corresponds to ODU0/1/2/3/4/flex slot number in OTN; when the encapsulated Ethernet frame passes the Ethernet-based switching fabric data device, the unicast, multicast, and broadcast forwarding behaviors
  • the Ethernet frame with the MPLS identifier encapsulated by the interlaken signal includes a source address, a destination address, a control word, an Ethertype/LSP/PW, a burst control word, a sequence number, a time stamp, and an ODU0. /1/2/3/4/flex slice and FCS, where the Ethertype value of the MPLS frame is represented by 0x8847 in hexadecimal, and the value of LSP/PW corresponds to the channel number in the burst control word byte.
  • the length of the control word is 64 bits, the length of the sequence number is 16 bits, the length of the time stamp is 32 bits, the length of the ODU0/1/2/3/4/flex slice is fixed, and the length is determined according to system requirements.
  • the 8-bit channel number in the burst control word corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN; when the encapsulated Ethernet frame passes the Ethernet-based switching fabric data device, the unicast The forwarding behavior of multicast and broadcast is determined by the destination address; the encapsulated Ethernet frame is exchanged in the Ethernet packet-based distributed switching architecture data device and exchanged to any single disk/arbitrary port in the device.
  • the invention decomposes the received OTN signal into an ODU0/1/2/3/4/flex signal, and the ODU0/1/2/3/4/flex signal is encapsulated into an interlaken signal by the SAR module, and each ODU0/1/2 /3/4/flex corresponds to one channel of interlaken, and the interlaken signal of each channel is encapsulated into an Ethernet frame as a payload, and the corresponding identifier of the interlaken payload of each channel is marked; after being encapsulated into an Ethernet frame, The Ethernet frame is sent to the peer end through the Ethernet switching network, and the peer end recovers the interlaken signal of the corresponding channel from the Ethernet frame through the Ethernet identifier, and the interlaken signal is restored to the corresponding ODU0/1/ by the SAR module.
  • the multiplex module multiplexes the ODU0/1/2/3/4/flex signal into an OTN signal transmission.
  • the invention can convert the OTN signal into an Ethernet payload, and regards the switching platform based on the Ethernet switching architecture as a unified switching platform, and the load and Ethernet load of the OTN can be exchanged arbitrarily on the unified platform, thereby the traditional data.
  • the switching device is upgraded to a unified switching transmission device, which is a traditional base.
  • the distributed switching architecture data device of the Ethernet packet provides the transmission capability of the OTN service interface, so that the traditional Ethernet packet-based distributed switching architecture data device has the capability of multi-service bearer and transmission complying with the POTN device standard requirements, and the The life cycle of a class device.
  • FIG. 1 is a schematic diagram of a frame format of an ODU0/1/2/3/4/flex encapsulated into an interlaken signal by a SAR module according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of format conversion of interlaken encapsulated into an Ethernet frame in the embodiment of the present invention.
  • Embodiments of the present invention provide a method for converting an OTN signal into an Ethernet payload, including the following steps:
  • each received OTN signal into an ODU (Optical Channel Data Unit) 0/1/2/3/4/flex (Optical Channel Data Unit flexible).
  • ODU Optical Channel Data Unit
  • Any combination of 6 signals, each ODUk0/1/2/3/4/flex signal corresponds to one channel of interlaken, interlanken protocol is a high-speed data transmission protocol between chips, and supports multi-channel transmission; then ODUk0/ The 1/2/3/4/flex signal is sent to the SAR (Segment And Regenerate) module. See Figure 1.
  • the SAR module is used to: continuously transmit ODU0/1/2/3/4 at the transmitting end.
  • the /flex signal is cut into fixed-length slices according to the length required by the system, and the corresponding channel number and management packet are added to encapsulate the interlaken signal; at the receiving end, the slice is restored from the interlaken signal, and the slice is re-aggregated to generate continuous Corresponding ODU0/1/2/3/4/flex signals.
  • the frame of the interlaken signal includes a Burst control word, a Sequence Number, a Timestamp, and an ODU0/1/2/3/4/flex slice (Fragment).
  • the length of the burst control word is 64 bits
  • the length of the sequence number is 16 bits
  • the length of the time stamp is 32 bits.
  • the length of the ODU0/1/2/3/4/flex slice is fixed, and the length is according to system requirements. It is determined that the 8-bit channel number in the burst control word corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN.
  • the interlaken signal of each channel is encapsulated into an Ethernet frame as a payload, and the Ethernet identifier of the corresponding Ethernet frame is marked for each channel's interlaken payload as needed.
  • the Ethernet identifier may be VLAN (Virtual Local Area Network) or MPLS (Multi-Protocol Label Switching).
  • the Ethernet frame with the VLAN ID encapsulated by the interlaken signal includes the source address, destination address, TPID (Tag Protocal Identifier)/VLAN, burst control word, serial number, time stamp, ODU0/1/2/3/4/flex slice and FCS (Frame Check Sequence), where the TPID is represented by a hexadecimal value of 0x8100, the VLAN value and the channel number in the burst control word byte.
  • the length of the burst control word is 64 bits
  • the length of the serial number is 16 bits
  • the length of the time stamp is 32 bits
  • the length of the ODU0/1/2/3/4/flex slice is fixed, and the length is The system needs to determine that the 8-bit channel number in the burst control word corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN.
  • the Ethernet frame with the MPLS identifier encapsulated by the interlaken signal includes the source address, the destination address, the control word, the Ethertype (Ethernet frame type), the LSP (Label Switched Path), and the PW (Pseudo). Wire, pseudowire), burst control word, serial number, time stamp, ODU0/1/2/3/4/flex slice, and FCS, where the Ethertype value of the MPLS frame is expressed in hexadecimal as 0x8847, LSP/PW The value corresponds to the channel number in the burst control word byte.
  • the length of the burst control word is 64 bits
  • the length of the sequence number is 16 bits
  • the length of the time stamp is 32 bits.
  • the length of the /4/flex slice is fixed, and the length is determined according to the system requirements, wherein the 8-bit channel number in the burst control word corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN.
  • the encapsulated Ethernet frame passes through the Ethernet-based switching fabric data device, the unicast, multicast, and broadcast forwarding behavior is determined by the destination address.
  • the encapsulated Ethernet frames can be arbitrarily exchanged within the Ethernet packet-based distributed switching fabric data device and exchanged to any single disk/arbitrary port within the device.
  • the encapsulated Ethernet frame is sent to the peer end through the Ethernet frame-based switching network, and the peer end recovers the Ethernet frame from the payload of the Ethernet frame through the Ethernet identifier in the Ethernet frame.
  • the recovered interlaken signal is sent to the SAR module.
  • the SAR module reassembles the fixed packet length data slice loaded in the corresponding channel payload into the corresponding ODU0/1/2/3/4/flex signal in the original order, and the multiplexing module will ODU0/1/2/3/
  • the 4/flex signal is multiplexed into a complete OTN signal according to the corresponding time slot arrangement.
  • the embodiment of the invention further provides a system for converting an OTN signal into an Ethernet payload for implementing the above method, including a decomposition module, a SAR module, and an Ethernet frame encapsulation module.
  • a decomposition module including a decomposition module, a SAR module, and an Ethernet frame encapsulation module.
  • Block Ethernet frame transmission module, interlaken signal recovery module and multiplexing module, wherein:
  • the decomposition module is configured to: decompose each received OTN signal into any combination of 6 signals of ODU0/1/2/3/4/flex, and each ODUk0/1/2/3/4/flex signal respectively Corresponds to a channel of interlaken; then sends the ODUk0/1/2/3/4/flex signal to the SAR module.
  • the SAR module is configured to: cut a continuous ODU0/1/2/3/4/flex signal into a fixed length slice according to the length required by the system at the transmitting end, and add the corresponding channel number and management package to be packaged into interlaken
  • the signal is restored to the slice from the interlaken signal at the receiving end, and the slice is re-aggregated to generate a continuous corresponding ODU0/1/2/3/4/flex signal;
  • the frame of the interlaken signal includes the burst control word, the serial number, and the time Poke and ODU0/1/2/3/4/flex slices, where the length of the burst control word is 64 bits, the length of the sequence number is 16 bits, and the length of the time stamp is 32 bits, ODU0/1/2/3
  • the length of the /4/flex slice is fixed, and the length is determined according to the system requirements, wherein the 8-bit channel number in the burst control word corresponds to the slot number of the ODU0/1/2/3/4/flex in the OTN.
  • the Ethernet frame encapsulation module is configured to: encapsulate the interlaken signal of each channel into an Ethernet frame as a payload, and mark the Ethernet identifier of the corresponding Ethernet frame for the interlaken payload of each channel as needed, and the Ethernet identifier may be For VLAN or MPLS.
  • the Ethernet frame with VLAN identification encapsulated by the interlaken signal includes a source address, a destination address, a TPID/VLAN, a burst control word, a sequence number, a time stamp, an ODU0/1/2/3/4/flex slice, and an FCS.
  • the TPID is represented by a hexadecimal value of 0x8100, and the VLAN value corresponds to the channel number in the burst control word byte.
  • the length of the burst control word is 64 bits, the length of the serial number is 16 bits, and the length of the time stamp. For 32 bits, the length of the ODU0/1/2/3/4/flex slice is fixed, and the length is determined according to the system requirements.
  • the 8-bit channel number in the burst control word corresponds to ODU0/1/2/3/4. /flex slot number in OTN.
  • the Ethernet frame with the MPLS identifier encapsulated by the interlaken signal includes the source address, destination address, control word, Ethertype/LSP/PW, burst control word, serial number, time stamp, ODU0/1/2/3/4/flex Slice and FCS, wherein the Ethertype value of the MPLS frame is represented by 0x8847 in hexadecimal, the value of LSP/PW is one-to-one corresponding to the channel number in the burst control word byte, and the length of the burst control word is 64 bits, the sequence The length of the number is 16 bits, the length of the time stamp is 32 bits, the length of the ODU0/1/2/3/4/flex slice is fixed, and the length is determined according to the system requirements, wherein the 8-bit channel in the burst control word The number corresponds to the slot number of ODU0/1/2/3/4/flex in OTN.
  • the unicast, multicast, and broadcast forwarding behavior is determined by the destination address.
  • the encapsulated Ethernet frames can be arbitrarily exchanged within the Ethernet packet-based distributed switching fabric data device and exchanged to any single disk/arbitrary port within the device.
  • the Ethernet frame sending module is configured to: send the encapsulated Ethernet frame to the interlaken signal recovery module of the peer end through the Ethernet frame-based switching network.
  • the interlaken signal recovery module is configured to: recover an interlaken signal corresponding to the corresponding channel of the Ethernet frame from the payload of the Ethernet frame by using an Ethernet identifier in the Ethernet frame, and send the recovered interlaken signal to the SAR module.
  • the SAR module reassembles the fixed packet length data slice loaded in the corresponding channel payload into the corresponding ODU0/1/2/3/4/flex signal in the original order.
  • the multiplexing module is configured to: multiplex the ODU0/1/2/3/4/flex signal into a complete OTN signal according to a corresponding time slot arrangement.

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Abstract

　本发明公开了一种将OTN信号转换为以太网净荷的方法及系统，涉及通信领域，该方法包括以下步骤：将接收到的OTN信号分解为ODU0/1/2/3/4/flex信号，经SAR模块封装成interlaken信号，每个ODU0/1/2/3/4/flex对应interlaken的一个通道，将每个通道的interlaken信号作为净荷封装成以太网帧，为每个通道的interlaken净荷标记对应的以太网标识；将以太网帧经过以太网交换网络送给对端，对端通过以太网标识恢复出对应通道的interlaken信号，经过SAR模块还原出相应的ODU0/1/2/3/4/flex信号，再复接成OTN信号发送。本发明能将OTN信号转化为以太网净荷，为传统的基于以太网包的分布式交换架构数据设备提供OTN业务接口的传送能力。

Description

将OTN信号转换为以太网净荷的方法及系统 技术领域
本发明涉及通信领域，具体是涉及一种将OTN信号转换为以太网净荷的方法及系统。
背景技术
目前的数据传送平台都要求具有POTN(Packet enhanced Optical Transport Network，分组增强型光传送网络)标准所要求的多业务承载和传送的能力，承载的业务接口主要有数据业务接口和TDM(Time Division Multiplex，时分复用)业务接口两大类。TDM业务接口又可分为SDH(Synchronous Digital Hierarchy，同步数字系列)、PDH(Plesiochronous Digital Hierarchy，准同步数字系列)和OTN(Optical Transport Network，光传送网)等。由于传统的数据传送平台有一部分是基于以太网包的分布式交换架构(不是信元)，该架构天然支持以太网数据接口，对于SDH接口和E1等PDH接口，分别采用CEP(SDH Circuit Emulation over Packet，分组网承载的SDH电路仿真)的方式或伪线仿真的技术方式，来实现基于数据包的分布式交换架构数据设备对TDM业务的传送，但对于OTN这样的大带宽业务接口，通过基于以太网包的分布式交换架构数据设备来传送，则没有统一的技术标准来规范和指引。
发明内容
本发明的目的是为了克服上述背景技术的不足，提供一种将OTN信号转换为以太网净荷的方法及系统，能够将OTN信号转化为 以太网净荷，将基于以太网交换架构的交换平台看做统一的交换平台，为传统的基于以太网包的分布式交换架构数据设备提供OTN业务接口的传送能力，使传统的基于以太网包的分布式交换架构数据设备具有符合POTN设备标准要求的多业务承载和传送的能力，延长该类设备的生命周期。
本发明提供一种将OTN信号转换为以太网净荷的方法，包括以下步骤：
A、将接收到的每个OTN信号分解为ODU0/1/2/3/4/flex这6个信号的任意组合，每一个ODUk0/1/2/3/4/flex信号分别对应interlaken的一个通道；然后将ODUk0/1/2/3/4/flex信号送给切片以及聚合SAR模块；SAR模块用于：在发送端将连续的ODU0/1/2/3/4/flex信号根据系统要求的长度切成固定长度的切片，同时加上相应的通道号和管理包，封装成interlaken信号；在接收端从interlaken信号中还原成切片，并将切片重新聚合生成连续的相应的ODU0/1/2/3/4/flex信号；
B、将每一个通道的interlaken信号作为净荷封装成以太网帧，同时根据需要为每一个通道的interlaken净荷标记对应以太网帧的以太网标识；
C、通过基于以太网帧的交换网络，将封装好的以太网帧送给对端，对端通过以太网帧中的以太网标识，从该以太网帧的净荷中恢复出该以太网帧对应通道的interlaken信号，将恢复出的interlaken信号送给SAR模块；
D、SAR模块将对应通道净荷中装载的固定包长数据切片按原有顺序重组成相应的ODU0/1/2/3/4/flex信号，复接模块将ODU0/1/2/3/4/flex信号按相应的时隙安排复接成完整的OTN信号送出。
在上述技术方案的基础上，所述interlaken信号的帧包括突发控制字、序列号、时戳和ODU0/1/2/3/4/flex切片，其中，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
在上述技术方案的基础上，所述以太网标识为虚拟局域网VLAN或者多协议标签交换MPLS。
在上述技术方案的基础上，所述interlaken信号封装成的带VLAN标识的以太网帧包括源地址、目的地址、标签协议识别符TPID/VLAN、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和帧校验序列FCS，其中，TPID用16进制表示值为0x8100，VLAN值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
在上述技术方案的基础上，所述interlaken信号封装成的带MPLS标识的以太网帧包括源地址、目的地址、控制字、以太网帧类型Ethertype/标签交换路径LSP/伪线PW、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，MPLS帧的Ethertype值用16进制表示为0x8847，LSP/PW的值和突发控制字字节中的通道号 一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
本发明还提供用于实现上述方法的将OTN信号转换为以太网净荷的系统，包括分解模块、SAR模块、以太网帧封装模块、以太网帧发送模块、interlaken信号恢复模块和复接模块，其中：
所述分解模块，用于：将接收到的每个OTN信号分解为ODU0/1/2/3/4/flex这6个信号的任意组合，每一个ODUk0/1/2/3/4/flex信号分别对应interlaken的一个通道；然后将ODUk0/1/2/3/4/flex信号送给SAR模块；
所述SAR模块，用于：在发送端将连续的ODU0/1/2/3/4/flex信号根据系统要求的长度切成固定长度的切片，同时加上相应的通道号和管理包，封装成interlaken信号；在接收端从interlaken信号中还原成切片，并将切片重新聚合生成连续的相应的ODU0/1/2/3/4/flex信号；
所述以太网帧封装模块，用于：将每一个通道的interlaken信号作为净荷封装成以太网帧，同时根据需要为每一个通道的interlaken净荷标记对应以太网帧的以太网标识；
所述以太网帧发送模块，用于：通过基于以太网帧的交换网络，将封装好的以太网帧送给对端的interlaken信号恢复模块；
所述interlaken信号恢复模块：用于：通过以太网帧中的以太网 标识，从该以太网帧的净荷中恢复出该以太网帧对应通道的interlaken信号，将恢复出的interlaken信号送给SAR模块；所述SAR模块将对应通道净荷中装载的固定包长数据切片按原有顺序重组成相应的ODU0/1/2/3/4/flex信号；
所述复接模块，用于：将ODU0/1/2/3/4/flex信号按相应的时隙安排复接成完整的OTN信号送出。
在上述技术方案的基础上，所述interlaken信号的帧包括突发控制字、序列号、时戳和ODU0/1/2/3/4/flex切片，其中，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
在上述技术方案的基础上，所述以太网标识为VLAN或者MPLS。
在上述技术方案的基础上，所述interlaken信号封装成的带VLAN标识的以太网帧包括源地址、目的地址、TPID/VLAN、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，TPID用16进制表示值为0x8100，VLAN值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
在上述技术方案的基础上，所述interlaken信号封装成的带MPLS标识的以太网帧包括源地址、目的地址、控制字、Ethertype/LSP/PW、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，MPLS帧的Ethertype值用16进制表示为0x8847，LSP/PW的值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
与现有技术相比，本发明的优点如下：
本发明将接收到的OTN信号分解为ODU0/1/2/3/4/flex信号，ODU0/1/2/3/4/flex信号经过SAR模块封装成interlaken信号，每一个ODU0/1/2/3/4/flex分别对应interlaken的一个通道，将每一个通道的interlaken信号作为净荷封装成以太网帧，同时为每一个通道的interlaken净荷标记对应的标识；封装成以太网帧后，将该以太网帧经过以太网交换网络送给对端，对端从该以太网帧中通过以太网标识恢复出对应通道的interlaken信号，将该interlaken信号经过SAR模块还原出相应的ODU0/1/2/3/4/flex信号，复接模块将ODU0/1/2/3/4/flex信号复接成OTN信号发送。本发明能够将OTN信号转化为以太网净荷，将基于以太网交换架构的交换平台看做统一的交换平台，OTN的负载和以太网负荷在该统一平台上能够任意交换，从而将传统的数据交换设备升级为统一交换的传输设备，为传统的基 于以太网包的分布式交换架构数据设备提供OTN业务接口的传送能力，使传统的基于以太网包的分布式交换架构数据设备具有符合POTN设备标准要求的多业务承载和传送的能力，延长该类设备的生命周期。
附图说明
图1是本发明实施例中ODU0/1/2/3/4/flex经过SAR模块封装成interlaken信号的帧格式示意图。
图2是本发明实施例中interlaken封装成以太网帧的格式变换示意图。
具体实施方式
下面结合附图及具体实施例对本发明作进一步的详细描述。
本发明实施例提供一种将OTN信号转换为以太网净荷的方法，包括以下步骤：
A、将接收到的每个OTN信号分解为ODU(Optical Channel Data Unit，光通道数据单元)0/1/2/3/4/flex(Optical channel Data Unit flexible，灵活的光通道数据单元)这6个信号的任意组合，每一个ODUk0/1/2/3/4/flex信号分别对应interlaken的一个通道，interlanken协议是一种芯片间高速数据传输协议，而且支持多通道传输；然后将ODUk0/1/2/3/4/flex信号送给SAR(Segment And Regenerate，切片以及聚合)模块，参见图1所示，SAR模块用于：在发送端将连续的ODU0/1/2/3/4/flex信号根据系统要求的长度切成固定长度的切片，同时加上相应的通道号和管理包，封装成interlaken信号；在接收端从interlaken信号中还原成切片，并将切片重新聚合生成连续的相应的ODU0/1/2/3/4/flex信号。
表1、interlaken信号的帧格式
Figure PCTCN2014086803-appb-000001
参见表1所示，interlaken信号的帧包括突发控制字(Burst control Word)、序列号(Sequence Number)、时戳(Timestamp)和ODU0/1/2/3/4/flex切片(Fragment)，其中，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
B、参见图2所示，将每一个通道的interlaken信号作为净荷封装成以太网帧，同时根据需要为每一个通道的interlaken净荷标记对应以太网帧的以太网标识，以太网标识可以为VLAN(Virtual Local Area Network，虚拟局域网)或者MPLS(Multi-Protocol Label Switching，多协议标签交换)等。
表2、带VLAN标识的以太网帧的格式
Figure PCTCN2014086803-appb-000002
参见表2所示，interlaken信号封装成的带VLAN标识的以太网帧包括源地址、目的地址、TPID(Tag Protocal Identifier，标签协议识别符)/VLAN、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS(Frame Check Sequence，帧校验序列)，其中，TPID用16进制表示值为0x8100，VLAN值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
表3、带MPLS标识的以太网帧的格式
Figure PCTCN2014086803-appb-000003
参见表3所示，interlaken信号封装成的带MPLS标识的以太网帧包括源地址、目的地址、控制字、Ethertype(以太网帧类型)/LSP(Label Switched Path，标签交换路径)/PW(Pseudo Wire，伪线)、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，MPLS帧的Ethertype值用16进制表示为0x8847，LSP/PW的值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定。封装好的以太网帧可以在基于以太网包的分布式交换架构数据设备内任意交换，交换到该设备内的任意单盘/任意端口。
C、通过基于以太网帧的交换网络，将封装好的以太网帧送给对端，对端通过以太网帧中的以太网标识，从该以太网帧的净荷中恢复出该以太网帧对应通道的interlaken信号，将恢复出的interlaken信号送给SAR模块。
D、SAR模块将对应通道净荷中装载的固定包长数据切片按原有顺序重组成相应的ODU0/1/2/3/4/flex信号，复接模块将ODU0/1/2/3/4/flex信号按相应的时隙安排复接成完整的OTN信号送出。
本发明实施例还提供一种用于实现上述方法的将OTN信号转换为以太网净荷的系统，包括分解模块、SAR模块、以太网帧封装模 块、以太网帧发送模块、interlaken信号恢复模块和复接模块，其中：
分解模块，用于：将接收到的每个OTN信号分解为ODU0/1/2/3/4/flex这6个信号的任意组合，每一个ODUk0/1/2/3/4/flex信号分别对应interlaken的一个通道；然后将ODUk0/1/2/3/4/flex信号送给SAR模块。
SAR模块，用于：在发送端将连续的ODU0/1/2/3/4/flex信号根据系统要求的长度切成固定长度的切片，同时加上相应的通道号和管理包，封装成interlaken信号；在接收端从interlaken信号中还原成切片，并将切片重新聚合生成连续的相应的ODU0/1/2/3/4/flex信号；interlaken信号的帧包括突发控制字、序列号、时戳和ODU0/1/2/3/4/flex切片，其中，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
以太网帧封装模块，用于：将每一个通道的interlaken信号作为净荷封装成以太网帧，同时根据需要为每一个通道的interlaken净荷标记对应以太网帧的以太网标识，以太网标识可以为VLAN或者MPLS等。
interlaken信号封装成的带VLAN标识的以太网帧包括源地址、目的地址、TPID/VLAN、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，TPID用16进制表示值为0x8100，VLAN值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
interlaken信号封装成的带MPLS标识的以太网帧包括源地址、目的地址、控制字、Ethertype/LSP/PW、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，MPLS帧的Ethertype值用16进制表示为0x8847，LSP/PW的值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定。封装好的以太网帧可以在基于以太网包的分布式交换架构数据设备内任意交换，交换到该设备内的任意单盘/任意端口。
以太网帧发送模块，用于：通过基于以太网帧的交换网络，将封装好的以太网帧送给对端的interlaken信号恢复模块。
interlaken信号恢复模块，用于：通过以太网帧中的以太网标识，从该以太网帧的净荷中恢复出该以太网帧对应通道的interlaken信号，将恢复出的interlaken信号送给SAR模块。
SAR模块将对应通道净荷中装载的固定包长数据切片按原有顺序重组成相应的ODU0/1/2/3/4/flex信号。
复接模块，用于：将ODU0/1/2/3/4/flex信号按相应的时隙安排复接成完整的OTN信号送出。
本领域的技术人员可以对本发明实施例进行各种修改和变型，倘若这些修改和变型在本发明权利要求及其等同技术的范围之内，则这些修改和变型也在本发明的保护范围之内。
说明书中未详细描述的内容为本领域技术人员公知的现有技术。

Claims (10)

  1. 一种将OTN信号转换为以太网净荷的方法，其特征在于，包括以下步骤：
    A、将接收到的每个OTN信号分解为ODU0/1/2/3/4/flex这6个信号的任意组合，每一个ODUk0/1/2/3/4/flex信号分别对应interlaken的一个通道；然后将ODUk0/1/2/3/4/flex信号送给切片以及聚合SAR模块；SAR模块用于：在发送端将连续的ODU0/1/2/3/4/flex信号根据系统要求的长度切成固定长度的切片，同时加上相应的通道号和管理包，封装成interlaken信号；在接收端从interlaken信号中还原成切片，并将切片重新聚合生成连续的相应的ODU0/1/2/3/4/flex信号；
    B、将每一个通道的interlaken信号作为净荷封装成以太网帧，同时根据需要为每一个通道的interlaken净荷标记对应以太网帧的以太网标识；
    C、通过基于以太网帧的交换网络，将封装好的以太网帧送给对端，对端通过以太网帧中的以太网标识，从该以太网帧的净荷中恢复出该以太网帧对应通道的interlaken信号，将恢复出的interlaken信号送给SAR模块；
    D、SAR模块将对应通道净荷中装载的固定包长数据切片按原有顺序重组成相应的ODU0/1/2/3/4/flex信号，复接模块将ODU0/1/2/3/4/flex信号按相应的时隙安排复接成完整的OTN信号送出。
  2. 如权利要求1所述的将OTN信号转换为以太网净荷的方法，其特征在于：所述interlaken信号的帧包括突发控制字、序列号、时戳和ODU0/1/2/3/4/flex切片，其中，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex 切片的长度是固定的，根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
  3. 如权利要求1或2所述的将OTN信号转换为以太网净荷的方法，其特征在于：所述以太网标识为虚拟局域网VLAN或者多协议标签交换MPLS。
  4. 如权利要求3所述的将OTN信号转换为以太网净荷的方法，其特征在于：所述interlaken信号封装成的带VLAN标识的以太网帧包括源地址、目的地址、标签协议识别符TPID/VLAN、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和帧校验序列FCS，其中，TPID用16进制表示值为0x8100，VLAN值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
  5. 如权利要求3所述的将OTN信号转换为以太网净荷的方法，其特征在于：所述interlaken信号封装成的带MPLS标识的以太网帧包括源地址、目的地址、控制字、以太网帧类型Ethertype/标签交换路径LSP/伪线PW、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，MPLS帧的Ethertype值用16进制表示为0x8847，LSP/PW的值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，根据系统需要来确定，其中 突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
  6. 用于实现权利要求1至5中任一项所述方法的将OTN信号转换为以太网净荷的系统，其特征在于：包括分解模块、SAR模块、以太网帧封装模块、以太网帧发送模块、interlaken信号恢复模块和复接模块，其中：
    所述分解模块，用于：将接收到的每个OTN信号分解为ODU0/1/2/3/4/flex这6个信号的任意组合，每一个ODUk0/1/2/3/4/flex信号分别对应interlaken的一个通道；然后将ODUk0/1/2/3/4/flex信号送给SAR模块；
    所述SAR模块，用于：在发送端将连续的ODU0/1/2/3/4/flex信号根据系统要求的长度切成固定长度的切片，同时加上相应的通道号和管理包，封装成interlaken信号；在接收端从interlaken信号中还原成切片，并将切片重新聚合生成连续的相应的ODU0/1/2/3/4/flex信号；
    所述以太网帧封装模块，用于：将每一个通道的interlaken信号作为净荷封装成以太网帧，同时根据需要为每一个通道的interlaken净荷标记对应以太网帧的以太网标识；
    所述以太网帧发送模块，用于：通过基于以太网帧的交换网络，将封装好的以太网帧送给对端的interlaken信号恢复模块；
    所述interlaken信号恢复模块：用于：通过以太网帧中的以太网标识，从该以太网帧的净荷中恢复出该以太网帧对应通道的interlaken 信号，将恢复出的interlaken信号送给SAR模块；所述SAR模块将对应通道净荷中装载的固定包长数据切片按原有顺序重组成相应的ODU0/1/2/3/4/flex信号；
    所述复接模块，用于：将ODU0/1/2/3/4/flex信号按相应的时隙安排复接成完整的OTN信号送出。
  7. 如权利要求6所述的将OTN信号转换为以太网净荷的系统，其特征在于：所述interlaken信号的帧包括突发控制字、序列号、时戳和ODU0/1/2/3/4/flex切片，其中，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号。
  8. 如权利要求6或7所述的将OTN信号转换为以太网净荷的系统，其特征在于：所述以太网标识为VLAN或者MPLS。
  9. 如权利要求8所述的将OTN信号转换为以太网净荷的系统，其特征在于：所述interlaken信号封装成的带VLAN标识的以太网帧包括源地址、目的地址、TPID/VLAN、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，TPID用16进制表示值为0x8100，VLAN值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
  10. 如权利要求8所述的将OTN信号转换为以太网净荷的系统，其特征在于：所述interlaken信号封装成的带MPLS标识的以太网帧包括源地址、目的地址、控制字、Ethertype/LSP/PW、突发控制字、序列号、时戳、ODU0/1/2/3/4/flex切片和FCS，其中，MPLS帧的Ethertype值用16进制表示为0x8847，LSP/PW的值和突发控制字字节中的通道号一一对应，突发控制字的长度为64比特，序列号的长度为16比特，时戳的长度为32比特，ODU0/1/2/3/4/flex切片的长度是固定的，长度根据系统需要来确定，其中突发控制字中的8比特通道号对应ODU0/1/2/3/4/flex在OTN中的时隙号；封装后的以太网帧通过基于以太网的交换架构数据设备时，单播、组播和广播的转发行为均由目的地址决定；封装好的以太网帧在基于以太网包的分布式交换架构数据设备内实现任意交换，交换到该设备内的任意单盘/任意端口。
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