WO2014124595A1 - 数据的映射、解映射方法及装置 - Google Patents

数据的映射、解映射方法及装置 Download PDF

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Publication number
WO2014124595A1
WO2014124595A1 PCT/CN2014/072041 CN2014072041W WO2014124595A1 WO 2014124595 A1 WO2014124595 A1 WO 2014124595A1 CN 2014072041 W CN2014072041 W CN 2014072041W WO 2014124595 A1 WO2014124595 A1 WO 2014124595A1
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WIPO (PCT)
Prior art keywords
otucnag
otuc
rate
column
gigabits per
Prior art date
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PCT/CN2014/072041
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English (en)
French (fr)
Inventor
付锡华
张新灵
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP14752183.5A priority Critical patent/EP2958261A4/en
Priority to US14/768,662 priority patent/US9906323B2/en
Publication of WO2014124595A1 publication Critical patent/WO2014124595A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0238Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths
    • H04J14/0239Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths in WDM-PON sharing multiple downstream wavelengths for groups of optical network units [ONU], e.g. multicasting wavelengths
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/16Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605Fixed allocated frame structures
    • H04J3/1652Optical Transport Network [OTN]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254Optical medium access
    • H04J14/0272Transmission of OAMP information
    • H04J14/0273Transmission of OAMP information using optical overhead, e.g. overhead processing

Definitions

  • the present invention relates to the field of communications, and in particular to a data mapping and demapping method and apparatus.
  • BACKGROUND OF THE INVENTION The development trend of optical transmission technology presents a single channel higher rate (for example, single channel 400G/1T transmission), higher spectral efficiency and higher order modulation format. Therefore, the continued improvement rate is still the clearest and most developed optical transmission. Important direction.
  • High-speed transmission faces many limitations. There are two main aspects: On the one hand, optical transmission technology is developing to high-spectrum efficiency aggregation transmission and high-speed service interface transmission. If spectrum efficiency cannot be further improved, low-speed convergence to high-speed retransmission is of little significance.
  • the transmission problem of the high-speed interface still needs to be considered.
  • 400G will be a critical point of the spectrum efficiency limit; on the other hand, the optical transmission technology will be long-distance (long-span and multi-span) Paragraph) Development, although the optical signal-to-noise ratio (OSNR) can be improved by using low-loss fiber, low-noise amplifier, and reduced span spacing, but the improvement is limited and it is difficult to make a major breakthrough. It is also difficult to implement in engineering. As the bandwidth requirements of the bearer network become larger and larger, the over 100G (Beyond 100G) technology becomes the solution for the bandwidth growth demand.
  • OSNR optical signal-to-noise ratio
  • the traditional 50GHz fixed grid (Wounded Grid) wavelength division multiplexing (Wavelength Division Multiplexing (WDM for short) cannot provide sufficient spectrum width to achieve over 100G technology. Due to the drawbacks of fixed grids, a wider flexible Grid is required.
  • the multi-rate mixed transmission of the super 100G and the flexibility of the super 100G modulation pattern result in different channel bandwidth requirements. If each channel is customized with a suitable bandwidth, the system bandwidth can be fully utilized, thereby generating a flexible grid system.
  • the need for ultra-high-speed WDM systems continues to increase based on bandwidth requirements, introducing the need for flexible Grid technology, but how to effectively perform spectrum planning and management, and compatibility with existing systems waiting for solution.
  • the embodiments of the present invention provide a solution for mapping and demapping data, so as to at least solve the problem of how to efficiently perform data mapping and multiplexing after introducing the flexible grid technology in the related art.
  • a data mapping method including: dividing an OTUCn of an ODUCn with a rate of n*100 gigabits per second and an OTU overhead, and dividing into multiple by byte interleaving OTUCmTG; each OTUCmTG is mapped into the corresponding OCh, and the data in OCh is carried on a continuous frequency sequence; wherein, the rate of OTUCnAG is n*100 gigabits per second, and the rate of OTUCmTG is m* 100 gigabits per second, m and n are positive integers, m ⁇ n.
  • splitting the OTUCnAG into multiple OTUCmTGs according to byte interleaving includes: splitting the OTUCnAG at a rate of n*100 gigabits per second into n optical channel transmission unit subframes at a rate of 100 gigabits per second.
  • OTUC OTUC
  • the OTU overhead byte of each OTUC carries at least one of the following: a number of the OTUC itself, and a number of the OTUCnAG to which the OTUC belongs.
  • mapping each OTUCmTG into the corresponding OCh includes: distributing each OTUCmTG to a plurality of electrical channel signals for transmission; and mapping the plurality of electrical channel signals corresponding to the same OTUCmTG to an OCh for transmission; The OChs corresponding to all OTUCmTGs in the same OTUCnAG belong to the same OChAG.
  • a demapping method for data after the foregoing mapping method including: using the same TTI or the same OTUCnAG according to the TTI or OTUCnAG number in the OTU overhead byte of the OTUC After all the OTUCs of the number are received, the contents of the kth column byte area of each OTUC are used as the [n*(kl)+x] of the OTUCnAG after demapping according to the number of the OTUCnAG to which the OTUC belongs.
  • a demapping method for data after the foregoing mapping method including: converting each optical signal of each OCh in the received OTUCnAG into multiple sets of electrical channel signals. , wherein each of the plurality of sets of electrical channel signals is converted into an OTUC.
  • a transmitting node for an optical signal including: a mapping module, configured to add OTUCn at a rate of n*100 gigabits per second plus OTUCnAG after 0TU overhead, according to words
  • the inter-segment insertion method is split into multiple OTUCmTGs, wherein the rate of OTUCnAG is n*100 gigabits per second, the rate of OTUCmTG is m*100 gigabits per second, m and n are positive integers, m ⁇ n;
  • the module is configured to map each OTUCmTG into a corresponding OCh, and carry the data in the OCh on a continuous frequency sequence for transmission.
  • the mapping module comprises: a splitting unit configured to split the OTUCnAG at a rate of n*100 gigabits per second into n optical channel transmission unit subframes OTUC at a rate of 100 gigabits per second, wherein the rate is n*100 gigabits per second of OTUCnAG's [n* (k-1 ) + i] column byte area contents as the i-th rate of 100 gigabits per second of OTUC's k-th byte area content, OTUC
  • the frame structure is 4 rows and 4080 columns, n, i, k, and L are all positive integers, and n>L, l ⁇ i ⁇ n, l ⁇ k ⁇ 4080 ; grouping units, set to n rates of 100 gi Bits per second OTUC packets, forming L OTUCmTGs with different rates or the same rate.
  • the transmitting module includes: a multiplexing unit configured to distribute each OTUCmTG to the plurality of electrical channel signals for transmission, and then map the plurality of electrical channel signals corresponding to the same OTUCmTG to one OCh for transmission; wherein, the same The OCh corresponding to all OTUCmTGs under OTUCnAG belongs to the same OChAG.
  • a multiplexing unit configured to distribute each OTUCmTG to the plurality of electrical channel signals for transmission, and then map the plurality of electrical channel signals corresponding to the same OTUCmTG to one OCh for transmission; wherein, the same The OCh corresponding to all OTUCmTGs under OTUCnAG belongs to the same OChAG.
  • a receiving node for an optical signal sent by the foregoing sending node comprising: a demapping module, configured to be the same according to a TTI or an OTUCnAG number in an OTU overhead byte of the OTUC After receiving all the OTUCs of the TTI or the same OTUCnAG number, according to the number of the OTUCnAG to which the OTUC belongs, the contents of the k-th byte area of each OTUC are used as the first [n*] of the OTUCnAG after demapping.
  • a receiving node for an optical signal sent by the sending node including: a demultiplexing module, configured to separately receive an optical signal of each OCh in an received OTUCnAG Converted into multiple sets of electrical channel signals, wherein each of the plurality of sets of electrical channel signals is converted into an OTUC.
  • a transmission system for an optical signal comprising the above-mentioned transmitting node and the above-mentioned receiving node.
  • the OTUCnAG after the ODUCn with the rate of n*100 gigabits per second plus the OTU overhead is split into multiple OTUCmTGs according to the inter-byte interpolation manner, and each OTUCmTG is mapped into the corresponding OCh respectively.
  • Medium, and carrying the data in OCh in a continuous frequency sequence for transmission solving the problem of how to efficiently perform data mapping and multiplexing after introducing flexible grid technology in related art, so that Operators can more flexibly deploy ultra-100G optical transmission systems, improving fiber spectrum utilization efficiency and system flexibility and compatibility.
  • FIG. 1 is a flowchart of a method of mapping and multiplexing data according to an embodiment of the present invention
  • FIG. 2 is a block diagram showing a structure of a transmitting node of an optical signal according to an embodiment of the present invention
  • FIG. 4 is a structural block diagram of a receiving node of an optical signal according to an embodiment of the present invention
  • FIG. 5 is a structural block diagram of a receiving node of an optical signal according to a preferred embodiment of the present invention
  • 6 is a structural block diagram of a transmission system of an optical signal according to an embodiment of the present invention
  • FIG. 7 is a structural block diagram of a transmission system of an optical signal according to a preferred embodiment of the present invention
  • FIG. 8 is an ODUCn-OTUCnAG- according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram of a mapping and multiplexing process flow of another ODUCn-OTUCnAG-OChAG according to Embodiment 1 of the present invention
  • FIG. 10 is an ODUCn- according to Embodiment 1 of the present invention.
  • FIG. 11 is a mapping, multiplexing and optical signal transmission of five signals on the same optical fiber according to Embodiment 1 of the present invention
  • FIG. 12 is a schematic diagram of a process of mapping, multiplexing, and optical signal transmission processing of another five signals on the same optical fiber according to Embodiment 1 of the present invention
  • FIG. 13 is a diagram showing ODUCn according to Embodiment 2 of the present invention
  • Schematic diagram of a method of mapping and multiplexing into OTUCnAG FIG.
  • FIG. 14 is a schematic diagram of a processing method for transmitting OTUCnAG into a plurality of OTUCmTGs and transmitting them in an optical layer according to Embodiment 2 of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • a data mapping method is provided. 1 is a flowchart of a method for mapping and multiplexing data according to an embodiment of the present invention. As shown in FIG.
  • Step S102 an optical channel data unit with a rate of n*100 gigabits per second
  • the frame (which can be recorded as ODUCn) plus the optical channel transmission unit (OTU) overhead optical channel transmission unit management framing (can be recorded as OTUCnAG), split into multiples according to the byte interleaving method
  • the optical channel transmission unit transmits a framing (which can be recorded as OTUCmTG), wherein the rate of OTUCnAG is n*100 gigabits per second, the rate of OTUCmTG is m*100 gigabits per second, m and n are positive integers, m ⁇ n;
  • Step SI 04 each OTUCmTG is mapped into a corresponding optical channel (Octical Channel, abbreviated as OCh), and the data in OCh is carried in a continuous frequency sequence for transmission.
  • OCh optical channel
  • splitting the OTUCnAG into multiple OTUCmTGs according to byte interleaving includes: splitting the OTUCnAG at a rate of n*100 gigabits per second into n lights having a rate of 100 gigabits per second.
  • each OTU overhead byte of the OTUC carries at least one of the following: the number of the OTUC itself, and the OTUCnAG of the OTUC Numbering.
  • each OTUCmTG is distributed to multiple electrical channel signals for transmission; and multiple electrical channel signals corresponding to the same OTUCmTG are mapped onto one OCh for transmission; wherein all OTUCmTGs under the same OTUCnAG The corresponding OCh belongs to the same Optical Channel Administrative Group (OChAG for short).
  • a method for demapping data after the foregoing mapping method including: a Trail Trace Identifier (TTI) or an OTUCnAG number according to a 0TU overhead byte of the 0TUC.
  • TTI Trail Trace Identifier
  • the contents of the kth column byte area of each OTUC are used as the demapping OTUCnAG according to the number of the OTUCnAG to which the OTUC belongs, in descending order.
  • n*(kl)+x] column byte area content where X is the number of OTUC in OTUCnAG, x is an integer, l ⁇ x ⁇ n.
  • another method for demapping data after the foregoing mapping method including: converting, respectively, the optical signals of each OCh in the received one OTUCnAG into multiple sets of electrical channel signals, where Each group of electrical channel signals in the plurality of electrical channel signals is converted into an OTUC.
  • a transmitting node of an optical signal is also provided. 2 is a structural block diagram of a transmitting node of an optical signal according to an embodiment of the present invention. As shown in FIG. 2, the transmitting node 20 includes: a mapping module 22 configured to add ODUCn at a rate of n*100 gigabits per second.
  • the OTUCnAG after the OTU overhead is split into multiple OTUCmTGs according to the inter-byte interpolation method.
  • the rate of OTUCnAG is n*100 gigabits per second, and the rate of OTUCmTG is m*100 gigabits per second, m and n are The positive integer, m ⁇ n; the transmitting module 24, coupled to the mapping module 22, is configured to map each OTUCmTG into a corresponding OCh, and carry the data in the OCh in a continuous frequency sequence for transmission.
  • the mapping module 22 splits the OTUCnAG with the ODU overhead of the rate n*100 gigabits per second plus the OTU overhead into multiple OTUCmTGs according to the byte interleaving manner, and the transmitting module 24 separates each OTUCmTG separately.
  • the company is able to deploy the ultra-100G optical transmission system more flexibly, improving the efficiency of fiber spectrum utilization and the flexibility and compatibility of the system.
  • the mapping module 22 includes: a splitting unit 222 configured to split an OTUCnAG at a rate of n*100 gigabits per second. Divided into n optical channel transmission unit subframes OTUC at a rate of 100 gigabits per second, where the [n* (k-1 ) + i] column byte region of OTUCnAG at a rate of n * 100 gigabits per second The content is the content of the k-th column of the OTUC at the i-th rate of 100 gigabits per second.
  • the frame structure of the OTUC is 4 rows and 4080 columns, n, i, k and L is a positive integer, and n>L, l ⁇ i ⁇ n, l ⁇ k ⁇ 4080 ; a grouping unit 224, coupled to the splitting unit 222, is configured to group n OTUC packets at a rate of 100 gigabits per second. L OTUCmTGs of different or identical rates.
  • the transmitting module 24 includes: a multiplexing unit 242, configured to distribute each OTUCmTG to a plurality of electrical channel signals for transmission, and then map the plurality of electrical channel signals corresponding to the same OTUCmTG to an OCh for transmission;
  • the OChs corresponding to all OTUCmTGs under the same OTUCnAG belong to the same 0ChAG.
  • a receiving node 40 for an optical signal transmitted by the transmitting node 20 of the optical signal there is further provided.
  • 4 is a structural block diagram of a receiving node of an optical signal according to an embodiment of the present invention. As shown in FIG.
  • the receiving node 40 includes: a demapping module 42 configured to trace the identifier according to the path in the OTU overhead byte of the OTUC ( ⁇ ) or OTUCnAG number, after all the OTUCs of the same ⁇ or the same OTUCnAG number are received, the contents of the k-th byte area of each OTUC are used as the solution according to the number of the OTUCnAG to which the OTUC belongs, in ascending order.
  • FIG. 5 is a structural block diagram of a receiving node of an optical signal according to a preferred embodiment of the present invention.
  • the receiving node 50 includes: a demultiplexing module 52, configured to receive each OCh in an OTUCnAG.
  • the optical signals are respectively converted into multiple sets of electrical channel signals, wherein each of the plurality of sets of electrical channel signals is converted into an OTUC.
  • an embodiment of the present invention provides a transmission system for an optical signal.
  • 6 is a block diagram showing the structure of a transmission system of an optical signal according to an embodiment of the present invention. As shown in FIG.
  • the system includes a transmitting node 20 of an optical signal and a receiving node 40 of an optical signal.
  • Another optical signal transmission system is also provided in accordance with an embodiment of the present invention.
  • 7 is a block diagram showing the structure of a transmission system of an optical signal according to an embodiment of the present invention. As shown in FIG. 7, the system includes a transmitting node 20 of an optical signal and a receiving node 50 of an optical signal.
  • the implementation process of the above embodiment will be described in detail below in conjunction with the preferred embodiments and the accompanying drawings.
  • Embodiment 1 This embodiment provides a method for data mapping and multiplexing of an optical transport network, so as to at least solve the problem of how to efficiently perform data mapping and multiplexing after introducing the flexible grid technology in the related art.
  • ODUCn optical channel data unit
  • the rates of ODUCn, OTUCnAG, and OCh are N times 100 gigabits per second
  • the branch timing of ODUCn is 100 gigabits per second
  • N is a positive integer greater than or equal to 2.
  • OTUCnAG is OTU high-speed management group, which is a composite signal of N*100 gigabits per second, composed of N 100G OTU frames.
  • OTUC2AG is 200Gbits per second
  • OTUC4AG is 400Gbits per second
  • OChAG is used to carry OTUCnAG.
  • Optical channel signal set if these optical signals pass through the same route, OChAG provides a single entity to manage these signals; if these signals pass different routes, multiple optical channels OCh are required, then the same route The number is managed by an optical channel.
  • the ODU4 carrying the low-order optical channel data unit (ODUk) or packet service data and the low-order ODUCm (m ⁇ n) carrying the packet service data may also be jointly multiplexed.
  • FIG. 9 is another ODUCn- according to the first embodiment of the present invention.
  • FIG. 9 is a mapping of ODUCn-OTUCnAG-z*OTUCmTG-OChAG according to Embodiment 1 of the present invention.
  • FIG. 10 A schematic diagram of a multiplexing process flow in which a plurality of optical signals included in an OChAG are carried by discrete spectrums and are routed through different routes, as shown in FIG.
  • mapping OTUCnAG into OChAG includes: inverse multiplexing OTUCnAG into multiple optical channel transmission units (OTUCmTG), and then mapping OTUCmTG into corresponding optical channel (OCh); wherein OTUCmTG rate is 100 gigabits M times per second, M is greater than or equal to 1 and M is less than N.
  • OTUCmTG Transport Group, m ⁇ n
  • OTUCmTG is a composite signal, which is an m*100G bit per second.
  • Each OTUCmTG has the same rate class, or all OTUCmTGs have different rate classes.
  • FIG. 11 is a schematic diagram of a process of mapping, multiplexing, and optical signal transmission processing of five signals on the same optical fiber according to Embodiment 1 of the present invention. As shown in FIG. 11, a total of five services are transmitted on one optical fiber.
  • #1 and #4 are 100 gigabits per second (Gbit/s, abbreviated as Gb/s) signals, each occupying 50 GHz of spectrum resources, and Single carrier transmission using Polarization-multiplexed Quadrature Phase Shift Keying (PM-QPSK) modulation.
  • Gbit/s gigabits per second
  • PM-QPSK Polarization-multiplexed Quadrature Phase Shift Keying
  • the payload of the OCh signal is supported by three optical signals (Optical Signal, referred to as OS), and each optical signal corresponds to a media channel (Media Channel).
  • the media channels (Media Channel) #2-1 and #2-2 corresponding to the two optical signals have a bit rate of 400 Gb/s.
  • the medium channel #2-1 is transmitted by four subcarriers (Sub Carriers, SC for short) SC1, SC2, SC3 and SC4, each of which uses a PM-QPSK modulation scheme, and each subcarrier has a bit rate of 100 gigabits per second (ie, 100 Gb/ s), occupying 75 GHz spectrum resources;
  • medium channel #2-2 is transmitted by two subcarriers SC1 and SC2 each adopting PM-16QAM modulation mode, each subcarrier has a bit rate of 200 gigabits per second, and occupies a total of 75 GHz spectrum resources;
  • the remaining optical channel corresponding to the optical channel #2-3 has a bit rate of 200 gigabits per second, and the medium channel #2-3 is transmitted by two subcarriers SC1 and SC1 each using PM-QPSK modulation, each of which The carrier bit rate is 100 gigabits per second, occupying a total of 50 GHz spectrum resources.
  • the media channels #3 is a 400 Gbit/s (400 Gb/s) signal.
  • the payload of the OCh signal is supported by two optical signals (OS).
  • Each optical signal corresponds to a media channel (Media Channel), and the two optical signals correspond to
  • the media channels #3-1 and #3-2 have bit rates of 200 Gbit/s.
  • the medium channel #3-1 is transmitted by the single subcarrier SC1 adopting the PM-16QAM modulation mode, and occupies 50 GHz spectrum resources;
  • the medium channel #3-2 is transmitted by the two subcarriers SC1 and SC2 each adopting the PM-QPSK modulation mode, each subcarrier
  • the bit rate is 100 gigabits per second, occupying a total of 50 GHz spectrum resources.
  • #5 is a signal of lTbit/s, and the payload of the OCh signal is supported by an optical signal (OS) corresponding to a media channel (Media Channel), which is composed of 5 subcarriers SC1 and SC2 using PM-16QAM modulation.
  • OS optical signal
  • Media Channel Media Channel
  • SC3, SC4 and B SC5 transmission, bit rate is 200Gbit/s, occupying 200GHz spectrum resources.
  • FIG. 12 is a schematic diagram showing the flow of mapping, multiplexing, and optical signal transmission processing of another five signals on the same optical fiber according to the first embodiment of the present invention. As shown in FIG. 12, on one optical fiber, there are five services on the top.
  • Transmission, #1 and #4 are 100 gigabits per second signals, each occupying 50 GHz of spectrum resources, and using single carrier transmission of PM-QPSK modulation.
  • the OTUCnAG is supported by three optical channels OCh. Each OCh corresponds to one media channel (Media Channel), and the media channels #2-1 and #2-2 corresponding to the two OChs.
  • the 400Gbit/so medium channel #2-1 is transmitted by four subcarriers SC1, SC2, SC3 and SC4 each adopting PM-QPSK modulation mode, each subcarrier has a bit rate of 100 gigabits per second, and occupies a total of 75 GHz spectrum resources;
  • Channel #2-2 is transmitted by two subcarriers SC1 and SC2 each adopting PM-16QAM modulation mode, each subcarrier has a bit rate of 200 gigabits per second, and occupies 75 GHz spectrum resources; the remaining one is corresponding to OCh.
  • the quality channel #2-3 has a bit rate of 200 gigabits per second, and the medium channel #2-3 is transmitted by two subcarriers SC1 and SC1 each using PM-QPSK modulation, each subcarrier having a bit rate of 100 gigabits per Seconds, occupying a total of 50 GHz spectrum resources.
  • the medium channel #3 is a 400 Gbit/s signal.
  • the payload of the OTUCnAG signal is supported by two OChs.
  • Each OCh-P corresponds to one media channel (Media Channel), and two OCh corresponding media channels #3-1 and #3-
  • the 2-bit rate is 200 Gbit/s.
  • the medium channel #3-1 is transmitted by a single subcarrier SC1 using PM-16QAM modulation mode, and occupies 50 GHz spectrum resources.
  • the medium channel #3-2 is transmitted by two subcarriers SC1 and SC2 which are both in the PM-QPSK modulation mode, and each subcarrier has a bit rate of 100 gigabits per second, which occupies 50 GHz of spectrum resources.
  • FIG. 13 is a schematic diagram of a processing method for mapping and multiplexing ODUCn into OTUCnAG according to Embodiment 2 of the present invention. As shown in FIG. 13, this embodiment provides a method for mapping ODUCn data into OTUCnAG and OTUCnAG data.
  • Step 1 Add OTU overhead and FEC (Forward Error Correction Coding) to the ODUCn frame to become a complete OTUCnAG frame.
  • OTU overhead and FEC Forward Error Correction Coding
  • OTUC4TG #2 400Gbit/s
  • B OTUC2TG #3 200Gbit/s
  • OTUCnAG is split into three OTUCmTG frames in byte interleaving mode, namely OTUC4TG #1, OTUC4TG #2 and OTUC2TG #3.
  • the OTUC4TG is interleaved by four OTUC bytes.
  • the OTUC2TG is interleaved by two OTUC bytes.
  • the OTUC is a 4*4808 frame structure defined by the protocol G.709. E.g,
  • (1) by byte interpolation method 4 rows of OTUCnAG, the first column is 4 rows of OTUC #1, the contents of the first column byte area; 4 rows of OTUCnAG, the second column is 4 rows of OTUC #2, the content of the first column byte region; 4 rows of OTUCnAG, the third column is 4 rows of OTUC #3, the content of the first column byte area; 4 rows of OTUCnAG, the 4th column is 4 rows of OTUC #4, the content of the first column byte region;
  • the 4-row byte area of the first column of the above four OTUC #1, OTUC #2, OTUC #3, and OTUC #4, respectively, constitutes the first column, the second column, the third column of the OTUCITG according to the byte interleaving method.
  • the column and the 4-row byte area of the 4th column form a logical OTUCITG, but actually on the OTN Framer chip, it is not necessary to reassemble into such an OTUciTG
  • I OTUCnAG 4 lines negative 15 columns as OTUC #5 4 lines, 2nd column byte area contents; 4 rows of OTUCnAG, 16th column as OTUC #6 4 Line, the contents of the second column byte area;
  • OTUCnAG has 4 rows
  • the 17th column is 4 rows of OTUC #7, the contents of the 2nd column byte area
  • the 18th column is 4 rows of OTUC #8, and the contents of the 2nd column byte area
  • the 4-row byte area of the second column of the above four OTUC #5, OTUC #6, OTUC #7, and OTUC #8, respectively, constitutes the fifth column, the sixth column, the seventh column of the OTUCjTG according to the byte interpolation method.
  • the column and the 4-row byte area of the 8th column form a logical OTUCjTG, but actually on the OTN Framer chip, it is not necessary to reassemble into such an OTUCjTG.
  • OTUCnAG performs the following byte interleaving steps in sequence, and the loop variable value is incremented from 1 to k.
  • Step 2.1 4 rows of OTUCnAG, 10th (k-1)+1 column as 4 rows of OTUC #1, content of byte region of column k; 4 rows of OTUCnAG, 10th (k-1) +2 Column as the 4 rows of OTUC #2, the contents of the k-th byte area;
  • the k-th column of 4 lines of OTUC #1 (4 bytes in total) constitutes the i*(k-l)+l column of OTUCiTG;
  • the k-th column of 4 lines of OTUC #i (4 bytes in total), which constitutes the i*(kl)+i column of OTUCiTG;
  • the data sender is in the 14th column of the first row of each OTUC frame (a total of one byte, the maximum number of the number is 2 8 , that is, the maximum number is 256).
  • the value of the number is i. For example, the number of 0TUC #1 is #1, the number of OTUC #2 is #2, and the number of OTUC #(il) is (i-1).
  • the number of OTUC #i is 1. And optionally in the first row of each OTUC frame, the 13th column (a total of one byte, the maximum number of the number is 2 8 , that is, the maximum number is 256), fill in the identifier of the OTUCnAG to which the OTUC #i belongs, OTUCnAG All OTUCs in the field have the same value for the fields.
  • Step 2.2 Set 4 rows of OTUCnAG, 10th (k-1) + i+l column as 4 rows of OTUC # (i+1), byte area of kth column; 4 rows of OTUCnAG, 10th ( K-1) + ⁇ +2 columns as 4 rows of OTUC # (i+2), the contents of the k-th byte area;
  • OTUC # (i+2) is numbered # (i+2)
  • OTUC # (i+j-1) is numbered (i+j-l )
  • OTUC # (i+2) is numbered # (i+2)
  • OTUC # (i+j-1) is numbered (i+j-l )
  • OTUC # (i+2) is numbered # (i+2)
  • OTUC # (i+j-1) is numbered (i+j-l )
  • OTUC # (i+2) is numbered # (i+2)
  • OTUC # (i+j-1) is numbered (i+j-l )
  • the number of (i+j) is (i+j). And optionally in the 13th column of the first row of each OTUC frame (a total of one byte, the maximum number of the number is 2 8 , that is, the maximum number is 256). Fill in the identifier of the OTUCnAG to which the OTUC #i belongs, OTUCnAG All OTUCs in the field have the same value for the fields.
  • Step 2.3 4 rows of OTUCnAG, 10th (k-1) + i+j+l columns are used as 4 rows of OTUC # (i+j+1 ), the contents of the k-th byte area; 4 rows of OTUCnAG, The 10th (k-1) +i+j+2 column is the 4th row of the OTUC # (i+j+2), and the contents of the kth byte area;
  • OTUC # (i+j+2) The k-th column of the 4th byte (4 bytes in total), which constitutes the p*(kl)+2 column of OTUCiTG;
  • the generated p OTUCs, the data sender fills in the number of OTUC # (i+j+p) in the 14th column of the first row of each OTUC frame, and the numbered value is (i+j+p), for example OTUC # (i+j+l ) is numbered # (1+"'+1 ),
  • the number of OTUC # (i+j+2) is # (i+j+2)
  • the number of OTUC # (i+j+p-1) is (i+j+p-l ).
  • the number of OTUC # (i+j+p) is (i+j+p). And optional in the first row of each OTUC frame, the 13th column (a total of one byte, the maximum number of the number is 2 8 , that is, the maximum number is 256) Fill in the identifier of the OTUCnAG to which an OTUC #i belongs, OTUCnAG All OTUCs in the field have the same value for the fields.
  • FIG. 14 is a schematic diagram of a processing method for transmitting OTUCnAG into multiple optical layers after splitting into OTUCmTG according to Embodiment 2 of the present invention.
  • n OTUCs generated by Step 2 (OTUC is The rate is 100Gbit/s, the 4*4080 frame structure defined by G.709), OTUC #l, OTUC #2 OTUC
  • OTUC # (i+l), OTUC # (i+2) OTUC # (i+j-1) and B OTUC # (i+j ) are transmitted on optical signal #2 via j group OTLC.m; OTUC # ( i+j+l ), OTUC # (i+j+2) OTUC # (i+j+p-1 ), OTUC # (i+j+p) respectively on p-group OTLC.m on optical signal #3 Transfer.
  • the OTLC.m rate is 100 Gbit/s, and is divided into m optical transmission channels for transmission. The rate of each optical transmission channel is 100 G divided by m. For example, when m is 4, the optical transmission channel is 25 G. When the value of m is 2, the optical transmission channel is 50G.
  • Embodiment 3 As shown in FIG. 13 and FIG. 14 , this embodiment provides a method for receiving data transmitted by Embodiment 2 from an optical layer, and demultiplexing and demultiplexing data from multiple OTUCmTGs to form OTUCn and ODUCn. method. It provides an example of receiving data from multiple discrete spectral optical signals at the data pick-up end and assembling OTUCmTG over multiple discrete spectra into a complete OTUCn and ODUCn frame.
  • Step 1 The data receiving end converts 10 sets of OTLC.m carried by the optical signals of three discrete spectrums OCh-P #l, OCh-P #2, OCh-P #3 into 10 OTUC frames, each discrete
  • the plurality of OTUC frames included in the spectrum logically form an OTUCmTG frame, which are 0TUCiTG, OTUCjTG, and OTUCpTG, respectively.
  • i in OTUCiTG is 4
  • 4 OTUC frames are included, which are OTUC #1, OTUC #2, OTUC #3, and OTUC #4.
  • j in OTUCjTG is 4, the indication is included.
  • the four OTUC frames are OTUC #5, OTUC #6, OTUC #7, and OTUC #8.
  • p is 2 in OTUCpTG, it indicates that there are two OTUC frames, which are OTUC #9 and OTUC #10.
  • Each OTUC frame is transformed from a set of OTLC.m.
  • Step 2 After receiving the OTUC frame, the data receiving end passes the Trail Trace Identifer (abbreviated as ⁇ ) in the OTUC frame, or the OTUCnAG number indicated by the 13th column in the first row of the OTUC frame. After the buffers have received the same ⁇ or all OTUC frames of the same OTUCnAG number, perform the following operations.
  • Trail Trace Identifer
  • the numbering value is filled in when the OTUC data is transmitted in Embodiment 4, and the number of the OTUC in the OTUCnAG is identified. In this embodiment, the number of the OTUC is incremented from 1 to i+j+p.
  • the contents of the byte area of the OTUC # x frame in the 4th line and the kth column are the 4th line of the OTUCnAG frame and the byte area of the (n*(k-l)+x).
  • the ODUCn frame in the OTUCnAG frame is processed.
  • the OTUCnAG after the ODUCn with the rate of n*100 gigabits per second plus the OTU overhead is split into multiple OTUCmTGs according to the inter-byte interpolation method, and each OTUCmTG is separately Map into the corresponding OCh, and carry the data in OCh in a continuous frequency sequence
  • the method of transmission solves the problem of how to efficiently map and multiplex data after introducing flexible grid technology in related technologies, so that operators can more flexibly deploy super 100G optical transmission system, and improve the utilization efficiency of optical fiber spectrum and System flexibility and compatibility.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc.
  • a data mapping and demapping method and apparatus provided by an embodiment of the present invention have the following beneficial effects: enabling an operator to more flexibly deploy a super 100G optical transmission system, thereby improving optical fiber spectrum utilization efficiency and System flexibility and compatibility.

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Abstract

本发明公开了一种数据的映射、解映射方法及装置,其中,该方法包括:将速率为n*100吉比特每秒的光通道数据单元帧(ODUCn)加上光通道传送单元(OTU)开销后的光通道传送单元管理组帧(OTUCnAG),按照字节间插方式拆分为多个光通道传送单元传输组帧(OTUCmTG);将每个OTUCmTG分别映射进对应的光通道(OCh)中,并将OCh中的数据承载在一段连续的频序上进行传送;其中,OTUCnAG的速率为n*100吉比特每秒,OTUCmTG的速率为m*100吉比特每秒,m、n均为正整数,m≤n。通过本发明,提高了光纤频谱利用效率以及系统的灵活性和兼容性。

Description

数据的映射、 解映射方法及装
技术领域 本发明涉及通信领域, 具体而言, 涉及一种数据的映射、 解映射方法及装置。 背景技术 光传输技术的发展趋势呈现单通道更高速率 (例如, 单通道 400G/1T传输)、 更 高频谱效率和高阶调制格式, 因此, 继续提升速率依然是光传输发展的最明确、 最重 要的方向。 高速传输面临很多的限制, 主要存在两个方面: 一方面, 光传输技术向高 谱效率汇聚传输和高速业务接口传输发展, 如果频谱效率无法继续提升, 则低速汇聚 至高速再传输意义不大, 但由于客户侧仍可能会有高速以太网接口, 仍需考虑高速接 口的传输问题, 400G将是频谱效率极限的一个临界点; 另一方面, 光传输技术向长距 离 (长跨段和多跨段) 发展, 虽然通过采用低损耗光纤、 低噪声放大器、 减小跨段间 距等手段可以提升系统光信噪比 (Optical Signal-Noise Ratio, 简称为 OSNR), 但改善 有限且难以取得重大突破, 工程上也难以实施。 随着承载网带宽需求越来越大, 超 100G (Beyond 100G) 技术成为带宽增长需求 的解决方案, 100G之上无论是 400G还是 1T, 传统的 50GHz固定栅格 (Fixed Grid) 的波分复用 (Wavelength Division Multiplexing, 简称为 WDM) 都无法提供足够的频 谱宽度实现超 100G 技术。 由于固定栅格的缺陷, 因此, 提出需要更宽的灵活栅格 (Flexible Grid )。 相关技术中,超 100G的多速率混传和超 100G调制码型灵活性导致通道带宽需求 不同, 若每个通道定制合适的带宽, 可实现系统带宽的充分利用, 从而产生了灵活栅 格系统。 基于带宽需求持续增加对超高速 WDM 系统的需求, 从而引入对灵活栅格 (Flexible Grid)技术的需求, 但是, 如何有效地进行频谱规划和管理, 以及与现有系 统的兼容性等很多问题都有待解决。 针对相关技术中引入灵活栅格后如何有效地进行数据的映射和复用问题, 目前尚 未提出有效的解决方案。 发明内容 本发明实施例提供了一种数据的映射、 解映射的方案, 以至少解决上述相关技术 中引入灵活栅格技术后如何有效地进行数据的映射和复用问题。 根据本发明实施例的一个方面, 提供了一种数据的映射方法, 包括: 将速率为 n*100吉比特每秒的 ODUCn加上 OTU开销后的 OTUCnAG, 按照字节间插方式拆分 为多个 OTUCmTG; 将每个 OTUCmTG分别映射进对应的 OCh中, 并将 OCh中的数 据承载在一段连续的频序上进行传送; 其中, OTUCnAG的速率为 n*100吉比特每秒, OTUCmTG的速率为 m* 100吉比特每秒, m、 n均为正整数, m≤n。 优选地,将 OTUCnAG按照字节间插方式拆分为多个 OTUCmTG包括: 将速率为 n*100吉比特每秒的 OTUCnAG拆分为 n个速率为 100吉比特每秒的光通道传送单元 子帧 OTUC; 将 n个速率为 100吉比特每秒的 OTUC分组, 组成速率不同或相同的 L 个 OTUCmTG; 其中, 速率为 n* 100吉比特每秒的 OTUCnAG的第 [n* (k-1 ) +i]列字 节区域内容作为第 i个速率为 100吉比特每秒的 OTUC的第 k列字节区域内容, OTUC 的帧结构为 4行 4080列, n、 i、 k和 L均为正整数, 且 n>L, l<i<n, l≤k≤4080。 优选地, 每个 OTUC的 OTU开销字节中携带至少以下之一: 该 OTUC本身的编 号、 该 OTUC所属 OTUCnAG的编号。 优选地, 将每个 OTUCmTG分别映射进对应的 OCh中包括: 将每个 OTUCmTG 分布到多个电通道信号上进行传输;再将同一 OTUCmTG对应的多个电通道信号映射 进一个 OCh上进行传输; 其中, 同一 OTUCnAG下的所有 OTUCmTG对应的 OCh属 于同一个 OChAG。 根据本发明实施例的另一方面, 提供了一种经上述映射方法后的数据的解映射方 法,包括:根据 OTUC的 OTU开销字节中的 TTI或者 OTUCnAG编号,将相同的 TTI 或者相同的 OTUCnAG编号的所有 OTUC接收完毕后, 根据 OTUC所属 OTUCnAG 的编号, 按照从小到大的顺序, 将每个 OTUC 的第 k列字节区域内容作为解映射后 OTUCnAG的第 [n*(k-l)+x]列字节区域内容; 其中, x为 OTUC在 OTUCnAG的编号, X为整数, l≤x≤n。 根据本发明实施例的再一方面, 提供了一种经上述映射方法后的数据的解映射方 法,包括:将接收到的一个 OTUCnAG中的每个 OCh的光信号分别转换为多组电通道 信号, 其中, 多组电通道信号中的每一组电通道信号转换为一个 OTUC。 根据本发明实施例的又一方面, 还提供了一种光信号的发送节点, 包括: 映射模 块, 设置为将速率为 n*100吉比特每秒的 ODUCn加上 0TU开销后的 OTUCnAG, 按 照字节间插方式拆分为多个 OTUCmTG, 其中, OTUCnAG的速率为 n*100吉比特每 秒, OTUCmTG的速率为 m* 100吉比特每秒, m、 n均为正整数, m≤n; 传送模块, 设置为将每个 OTUCmTG分别映射进对应的 OCh中, 并将 OCh中的数据承载在一段 连续的频序上进行传送。 优选地,映射模块包括:拆分单元,设置为将速率为 n*100吉比特每秒的 OTUCnAG 拆分为 n个速率为 100吉比特每秒的光通道传送单元子帧 OTUC,其中,速率为 n*100 吉比特每秒的 OTUCnAG的第 [n* (k-1 ) +i]列字节区域内容作为第 i个速率为 100吉 比特每秒的 OTUC的第 k列字节区域内容, OTUC的帧结构为 4行 4080列, n、 i、 k 和 L均为正整数, 且 n>L, l<i<n, l<k<4080; 分组单元, 设置为将 n个速率为 100 吉比特每秒的 OTUC分组, 组成速率不同或相同的 L个 OTUCmTG。 优选地, 传送模块包括: 复用单元, 设置为将每个 OTUCmTG分布到多个电通道 信号上进行传输, 再将同一 OTUCmTG对应的多个电通道信号映射进一个 OCh上进 行传输;其中,同一 OTUCnAG下的所有 OTUCmTG对应的 OCh属于同一个 OChAG。 根据本发明实施例的另一方面, 还提供了一种上述发送节点发送的光信号的接收 节点,包括:解映射模块,设置为根据 OTUC的 OTU开销字节中的 TTI或者 OTUCnAG 编号,将相同的 TTI或者相同的 OTUCnAG编号的所有 OTUC接收完毕后,根据 OTUC 所属 OTUCnAG的编号, 按照从小到大的顺序, 将每个 OTUC的第 k列字节区域内容 作为解映射后 OTUCnAG 的第 [n*(k-l)+x]列字节区域内容; 其中, x 为 OTUC 在 OTUCnAG的编号, X为整数, l≤x≤n。 根据本发明实施例的再一方面, 提供了一种由上述发送节点发送的光信号的接收 节点, 包括: 解复用模块, 设置为将接收到的一个 OTUCnAG中的每个 OCh的光信号 分别转换为多组电通道信号, 其中, 多组电通道信号中的每一组电通道信号转换为一 个 OTUC。 根据本发明实施例的又一方面, 还提供了一种光信号的传送系统, 包括上述发送 节点和上述接收节点。 通过本发明实施例,采用将速率为 n*100吉比特每秒的 ODUCn加上 OTU开销后 的 OTUCnAG, 按照字节间插方式拆分为多个 OTUCmTG, 将每个 OTUCmTG分别映 射进对应的 OCh中, 并将 OCh中的数据承载在一段连续的频序上进行传送的方式, 解决了相关技术中引入灵活栅格技术后如何有效地进行数据的映射和复用的问题, 使 得运营商能够更加灵活地部署超 100G光传送系统, 提高了光纤频谱利用效率以及系 统的灵活性和兼容性。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 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- 图 1是根据本发明实施例的数据的映射和复用方法的流程图; 图 2是根据本发明实施例的光信号的发送节点的结构框图; 图 3是根据本发明优选实施例的光信号的发送节点的结构框图; 图 4是根据本发明实施例的光信号的接收节点的结构框图; 图 5是根据本发明优选实施例的光信号的接收节点的结构框图; 图 6是根据本发明实施例的光信号的传送系统的结构框图; 图 7是根据本发明优选实施例的光信号的传送系统的结构框图; 图 8是根据本发明实施例一的 ODUCn-OTUCnAG-OCh的映射和复用处理流程的 示意图; 图 9是根据本发明实施例一的另一 ODUCn-OTUCnAG-OChAG的映射和复用处理 流程的示意图; 图 10是根据本发明实施例一的 ODUCn-OTUCnAG-z*OTUCmTG-OChAG的映射 和复用处理流程的示意图; 图 11是根据本发明实施例一的 5个信号在同一条光纤上的映射、复用和光信号传 送处理流程的示意图; 图 12是根据本发明实施例一的另一 5个信号在同一条光纤上的映射、复用和光信 号传送处理流程的示意图; 图 13是根据本发明实施例二的将 ODUCn映射和复用进 OTUCnAG的处理方法的 示意图; 图 14是根据本发明实施例二的将 OTUCnAG拆分为多个 OTUCmTG后在光层进 行传送的处理方法的示意图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 根据本发明实施例, 提供了一种数据的映射方法。 图 1是根据本发明实施例的数 据的映射和复用方法的流程图, 如图 1所示, 该方法包括如下步骤: 步骤 S102, 将速率为 n*100吉比特每秒的光通道数据单元帧 (可记作 ODUCn) 加上光通道传送单元 (Optical Transmit Unit, 简称为 OTU) 开销后的光通道传送单元 管理组帧(可记作 OTUCnAG), 按照字节间插方式拆分为多个光通道传送单元传输组 帧(可记作 OTUCmTG), 其中, OTUCnAG的速率为 n* 100吉比特每秒, OTUCmTG 的速率为 m*100吉比特每秒, m、 n均为正整数, m≤n; 步骤 SI 04, 将每个 OTUCmTG分别映射进对应的光通道 (Optical Channel, 简称 为 OCh) 中, 并将 OCh中的数据承载在一段连续的频序上进行传送。 通过上述步骤, 采用将速率为 n*100吉比特每秒的 ODUCn加上 OTU开销后的
OTUCnAG, 按照字节间插方式拆分为多个 OTUCmTG, 将每个 OTUCmTG分别映射 进对应的 OCh中, 并将 OCh中的数据承载在一段连续的频序上进行传送的方式, 解 决了相关技术中引入灵活栅格技术后如何有效地进行数据的映射和复用的问题, 使得 运营商能够更加灵活地部署超 100G光传送系统, 提高了光纤频谱利用效率以及系统 的灵活性和兼容性。 优选地,在步骤 S102中,将 OTUCnAG按照字节间插方式拆分为多个 OTUCmTG 包括: 将速率为 n*100吉比特每秒的 OTUCnAG拆分为 n个速率为 100吉比特每秒的 光通道传送单元子帧 OTUC; 将 n个速率为 100吉比特每秒的 OTUC分组, 组成速率 不同或相同的 L个 OTUCmTG;其中,速率为 n*100吉比特每秒的 OTUCnAG的第 [n* (k-l )+i]列字节区域内容作为第 i个速率为 100吉比特每秒的 OTUC的第 k列字节区 域内容, OTUC的帧结构为 4行 4080列, n、 i、 k和 L均为正整数, 且 n>L, l≤i≤n, l<k<4080 o 优选地, 每个 OTUC的 OTU开销字节中携带至少以下之一: 该 OTUC本身的编 号、 该 OTUC所属 OTUCnAG的编号。 优选地, 在步骤 S104中, 将每个 OTUCmTG分布到多个电通道信号上进行传输; 再将同一 OTUCmTG对应的多个电通道信号映射进一个 OCh上进行传输; 其中, 同 一 OTUCnAG下的所有 OTUCmTG对应的 OCh属于同一个光通道管理组 (Optical Channel Administrative Group, 简称为 OChAG )。 根据本发明实施例,还提供了一种经上述映射方法后的数据的解映射方法,包括: 根据 0TUC的 0TU开销字节中的路径跟踪标识 (Trail Trace Identifier, 简称为 TTI) 或者 OTUCnAG编号, 将相同的 TTI或者相同的 OTUCnAG编号的所有 OTUC接收 完毕后, 根据 OTUC所属 OTUCnAG的编号, 按照从小到大的顺序, 将每个 OTUC 的第 k列字节区域内容作为解映射后 OTUCnAG的第 [n*(k-l)+x]列字节区域内容; 其 中, X为 OTUC在 OTUCnAG的编号, x为整数, l≤x≤n。 根据本发明实施例, 还提供了另一种经上述映射方法后的数据的解映射方法, 包 括: 将接收到的一个 OTUCnAG中的每个 OCh的光信号分别转换为多组电通道信号, 其中, 多组电通道信号中的每一组电通道信号转换为一个 OTUC。 根据本发明实施例, 还提供了一种光信号的发送节点。 图 2是根据本发明实施例 的光信号的发送节点的结构框图, 如图 2所示, 该发送节点 20包括: 映射模块 22, 设置为将速率为 n* 100吉比特每秒的 ODUCn加上 OTU开销后的 OTUCnAG,按照字 节间插方式拆分为多个 OTUCmTG, 其中, OTUCnAG的速率为 n* 100吉比特每秒, OTUCmTG的速率为 m* 100吉比特每秒, m、 n均为正整数, m≤n; 传送模块 24, 耦 合至映射模块 22, 设置为将每个 OTUCmTG分别映射进对应的 OCh中, 并将 OCh中 的数据承载在一段连续的频序上进行传送。 通过上述发送节点 20, 映射模块 22将速率为 n* 100吉比特每秒的 ODUCn加上 OTU开销后的 OTUCnAG, 按照字节间插方式拆分为多个 OTUCmTG, 传送模块 24 将每个 OTUCmTG分别映射进对应的 OCh中, 并将 OCh中的数据承载在一段连续的 频序上进行传送, 解决了相关技术中引入灵活栅格技术后如何有效地进行数据的映射 和复用的问题, 使得运营商能够更加灵活地部署超 100G光传送系统, 提高了光纤频 谱利用效率以及系统的灵活性和兼容性。 图 3是根据本发明优选实施例的光信号的发送节点的结构框图, 如图 3所示, 映 射模块 22包括: 拆分单元 222, 设置为将速率为 n* 100吉比特每秒的 OTUCnAG拆分 为 n个速率为 100吉比特每秒的光通道传送单元子帧 OTUC, 其中, 速率为 n* 100吉 比特每秒的 OTUCnAG的第 [n* (k-1 ) +i]列字节区域内容作为第 i个速率为 100吉比 特每秒的 OTUC的第 k列字节区域内容, OTUC的帧结构为 4行 4080列, n、 i、 k和 L均为正整数, 且 n>L, l<i<n, l<k<4080; 分组单元 224, 耦合至拆分单元 222, 设 置为将 n个速率为 100 吉比特每秒的 OTUC 分组, 组成速率不同或相同的 L 个 OTUCmTG。 优选地, 传送模块 24包括: 复用单元 242, 设置为将每个 OTUCmTG分布到多个 电通道信号上进行传输,再将同一 OTUCmTG对应的多个电通道信号映射进一个 OCh 上进行传输; 其中, 同一 OTUCnAG下的所有 OTUCmTG对应的 OCh属于同一个 0ChAG。 根据本发明实施例,还提供了一种由上述光信号的发送节点 20发送的光信号的接 收节点 40。 图 4是根据本发明实施例的光信号的接收节点的结构框图, 如图 4所示, 该接收节点 40包括:解映射模块 42,设置为根据 OTUC的 OTU开销字节中的路径跟 踪标识 (ΤΉ) 或者 OTUCnAG编号, 将相同的 ΤΉ或者相同的 OTUCnAG编号的所 有 OTUC接收完毕后, 根据 OTUC所属 OTUCnAG的编号, 按照从小到大的顺序, 将每个 OTUC的第 k列字节区域内容作为解映射后 OTUCnAG的第 [n*(k-l)+x]列字节 区域内容; 其中, X为 OTUC在 OTUCnAG的编号, x为整数, l≤x≤n。 根据本发明实施例,还提供了另一种由上述光信号的发送节点 20发送的光信号的 接收节点 50。 图 5是根据本发明优选实施例的光信号的接收节点的结构框图, 如图 5 所示, 该接收节点 50包括: 解复用模块 52, 设置为将接收到的一个 OTUCnAG中的 每个 OCh的光信号分别转换为多组电通道信号, 其中, 多组电通道信号中的每一组电 通道信号转换为一个 OTUC。 此外, 本发明实施例提供了一种光信号的传送系统。 图 6是根据本发明实施例的 光信号的传送系统的结构框图, 如图 6所示,该系统包括光信号的发送节点 20和光信 号的接收节点 40。 根据本发明实施例, 还提供了另一种光信号的传送系统。 图 7是根据本发明实施 例的光信号的传送系统的结构框图, 如图 7 所示, 该系统包括光信号的发送节点 20 和光信号的接收节点 50。 下面结合优选实施例和附图对上述实施例的实现过程进行详细说明。 实施例一 本实施例提供了一种光传送网的数据映射与复用的方法, 以至少解决上述相关技 术中引入灵活栅格技术后如何有效地进行数据的映射和复用问题。 图 8是根据本发明实施例一的 ODUCn-OTUCnAG-OCh的映射和复用处理流程的 示意图, 如图 8 所示, 将分组业务数据映射到光通道数据单元 (ODUCn, 表示比 ODUk(k=0.1,2,2e,3,4)更高的速率, 并将 ODUCn 映射进光通道传送单元高速管理组 (OTU High-speed Administrative Group, 简称为 OTUCnAG); 再将 OTUCnAG映射进 光通道 (OCh); 其中, ODUCn、 OTUCnAG和 OCh的速率均是 N倍的 100吉比特每 秒, ODUCn的支路时序大小为 100吉比特每秒, N为大于等于 2的正整数。 需要说明的是, OTUCnAG为 OTU高速管理组, 它是一个 N*100吉比特每秒的 复合信号,有 N个 100G OTU帧组成,比如, OTUC2AG为 200G比特每秒, OTUC4AG 表示 400G比特每秒; OChAG表示用来承载 OTUCnAG的光通道信号集合, 如果这些 光信号经过同一条路由时, OChAG提供单个实体来管理这些信号;如果这些信号经过 不同的路由,需要多个光通道 OCh,那么经过相同路由的信号通过一个光通道来管理。 优选地, 也可以将承载了低阶光通道数据单元(ODUk)或分组业务数据的 ODU4 和承载了分组业务数据的低阶的 ODUCm (m<n) 联合复用进高阶的 ODUCn, 其中, ODUk至少包括以下之一: ODU0、 ODUK ODU2、 ODU2e、 ODU3、 ODUflex; 再将 高阶的 ODUCn映射进 OTUCnAG。 图 9是根据本发明实施例一的另一 ODUCn-OTUCnAG-OCh的映射和复用处理流 程的示意图, 其中, OCh所包含的多个光信号通过离散的频谱来承载, 并且经过相同 的路由, 如图 9所示, 将 ODUCn映射进 OTUCnAG, OTUCnAG通过单个 OCh, OCh 里的光信号经过同一条路由, 并且占用离散的频谱。通过单个 OCh实体来管理这些信 号。 图 10是根据本发明实施例一的 ODUCn-OTUCnAG-z*OTUCmTG-OChAG的映射 和复用处理流程的示意图,其中, OChAG所包含的多个光信号通过离散的频谱来承载, 并且经过不相同的路由,如图 10所示,将 ODUCn映射进 OTUCnAG,再将 OTUCnAG 映射进 OChAG包括: 将 OTUCnAG反向复用进多个光通道传送单元 (OTUCmTG), 再将 OTUCmTG映射进对应的光通道 (OCh); 其中, OTUCmTG速率均为 100吉比 特每秒的 M倍, M大于等于 1且 M小于 N。 OTUCmTG (Transport Group, m<n)是一 个复合信号, 它是一个 m*100G比特每秒。 每个 OTUCmTG均具有相同的速率等级, 或者, 所有的 OTUCmTG均具有不同的速率等级。 图 11是根据本发明实施例一的 5个信号在同一条光纤上的映射、复用和光信号传 送处理流程的示意图, 如图 11 所示, 在一条光纤上, 共有 5个业务在上面传输, #1 和 #4是 100吉比特每秒 (Gbit/s, 简称为 Gb/s) 信号, 各占用 50GHz的频谱资源, 并 采用偏振复用正交相移键控 (Polarization-multiplexed Quadrature Phase Shift Keying, 简称为 PM-QPSK) 调制方式的单载波传输。
#2是 lTbit/s (即 lTb/s)的信号,该 OCh信号的净荷由三个光信号(Optical Signal, 简称为 OS) 支持, 每个光信号对应一条介质通道 (Media Channel), 其中两个光信号 对应的介质通道 (Media Channel) #2-1和 #2-2比特速率为 400Gb/s。 介质通道 #2-1由 均采用 PM-QPSK调制方式的 4个子载波 (Sub Carrier, 简称为 SC) SC1、 SC2、 SC3 和 SC4传送, 每个子载波比特速率为 100吉比特每秒 (即 100Gb/s), 共占用 75GHz 频谱资源; 介质通道 #2-2由均采用 PM-16QAM调制方式的 2个子载波 SC1和 SC2传 送, 每个子载波比特速率为 200吉比特每秒, 共占用 75GHz频谱资源; 剩下的一个光 信号对应的介质通道 #2-3 的比特速率为 200 吉比特每秒, 该介质通道 #2-3 由均采用 PM-QPSK调制方式的 2个子载波 SC1和 SC1传送, 每个子载波比特速率为 100吉比 特每秒, 共占用 50GHz频谱资源。
#3是 400Gbit/s (即 400Gb/s) 的信号, 该 OCh信号的净荷由两个光信号 (OS) 支持, 每个光信号对应一条介质通道 (Media Channel), 两个光信号对应的介质通道 #3-1和 #3-2比特速率均为 200Gbit/s。 介质通道 #3-1由采用 PM-16QAM调制方式的单 子载波 SC1传送, 占用 50GHz频谱资源; 介质通道 #3-2由均采用 PM-QPSK调制方式 的 2个子载波 SC1和 SC2传送,每个子载波比特速率为 100吉比特每秒,共占用 50GHz 频谱资源。
#5是 lTbit/s的信号, 该 OCh信号的净荷由一个光信号 (OS)支持, 该光信号对 应一条介质通道 (Media Channel), 由采用 PM-16QAM调制方式的 5个子载波 SC1、 SC2、 SC3、 SC4禾 B SC5传送, 比特速率均为 200Gbit/s, 占用 200GHz频谱资源。 图 12是根据本发明实施例一的另一 5个信号在同一条光纤上的映射、复用和光信 号传送处理流程的示意图, 如图 12所示, 在一条光纤上, 共有 5个业务在上面传输, #1和 #4是 100吉比特每秒信号, 各占用 50GHz的频谱资源, 并采用 PM-QPSK调制 方式的单载波传输。
#2是 lTbit/s的信号,该 OTUCnAG由三个光通道 OCh支持,每个 OCh对应一条 介质通道 (Media Channel), 其中两个 OCh对应的介质通道 #2-1 和 #2-2 比特速率为 400Gbit/so 介质通道 #2-1由均采用 PM-QPSK调制方式的 4个子载波 SC1、 SC2、 SC3 和 SC4传送, 每个子载波比特速率为 100吉比特每秒, 共占用 75GHz频谱资源; 介 质通道 #2-2由均采用 PM-16QAM调制方式的 2个子载波 SC1和 SC2传送, 每个子载 波比特速率为 200吉比特每秒, 共占用 75GHz频谱资源; 剩下的一个 OCh对应的介 质通道 #2-3的比特速率为 200吉比特每秒, 该介质通道 #2-3由均采用 PM-QPSK调制 方式的 2个子载波 SC1和 SC1传送, 每个子载波比特速率为 100吉比特每秒, 共占用 50GHz频谱资源。
#3是 400Gbit/s的信号, 该 OTUCnAG信号的净荷由两个 OCh支持, 每个 OCh-P 对应一条介质通道(Media Channel), 两个 OCh对应的介质通道 #3-1和 #3-2比特速率 均为 200Gbit/s。 介质通道 #3-1由采用 PM-16QAM调制方式的单子载波 SC1传送, 占 用 50GHz频谱资源。 介质通道 #3-2由均采用 PM-QPSK调制方式的 2个子载波 SC1 和 SC2传送, 每个子载波比特速率为 100吉比特每秒, 共占用 50GHz频谱资源。
#5是 lTbit/s的信号,该 OTUCnAG信号的净荷由一个 OCh支持,该 OCh对应一 条介质通道(Media Channel), 由采用 PM-16QAM调制方式的 5个子载波 SC1、 SC2、 SC3、 SC4禾 B SC5传送, 比特速率均为 200Gbit/s, 占用 200GHz频谱资源。 实施例二 图 13是根据本发明实施例二的将 ODUCn映射和复用进 OTUCnAG的处理方法的 示意图, 如图 13所示,本实施例提供了一种将 ODUCn数据映射进 OTUCnAG以及将 OTUCnAG数据流在光层进行传送的方法, 它提供了在数据发送端将 1 个 lTbit/s 的 ODUCn (n=10) 映射进一个 lTbit/s OTUCn以及将 OTUCn在光层进行传送的例子。 步骤 1 : 在 ODUCn帧里加上 OTU开销以及 FEC (前向纠错编码)后, 成为一个 完整的 OTUCnAG帧。 在本实施例里, 如图 13所示的 lTbit/s的 ODUCn, ODUCn映 射到 OTUCnAG帧。 步骤 2: OTUCnAG帧拆分为三个 OTUCmTG帧,分别是 OTUC4TG #l(400Gbit/s)、
OTUC4TG #2 (400Gbit/s)禾 B OTUC2TG #3 (200Gbit/s), 分别在三段连续频谱上进行 传送, 分别是 OCh-P #l, OCh-P #2, OCh-P #3。
OTUCnAG按照字节间插方式,拆分为三个 OTUCmTG帧,分别是 OTUC4TG #1, OTUC4TG #2和 OTUC2TG #3。 为了方便描述下面的算法, 区分不同的 OTUCmTG, 分别标记为 OTUCiTG、 OTUCjTG和 OTUpTG, 其中, i+j+p = n, i、 j、 p和 n均为正 整数。 OTUC4TG由 4个 OTUC字节间插而成, OTUC2TG由 2个 OTUC字节间插而 成, OTUC为协议 G.709定义的 4*4808的帧结构。 例如,
( 1 ) 通过字节间插方法: 将 OTUCnAG的 4行, 第 1列作为 OTUC #1的 4行, 第 1列字节区域内容; 将 OTUCnAG的 4行, 第 2列作为 OTUC #2的 4行, 第 1列字节区域内容; 将 OTUCnAG的 4行, 第 3列作为 OTUC #3的 4行, 第 1列字节区域内容; 将 OTUCnAG的 4行, 第 4列作为 OTUC #4的 4行, 第 1列字节区域内容; 上述 4个 OTUC #1、 OTUC #2、 OTUC #3和 OTUC #4的第一列的 4行字节区域, 按照字节间插方法, 分别组成 OTUCiTG的第 1列, 第 2列、 第 3列和第 4列的 4行 字节区域, 组成一个逻辑的 OTUCiTG, 但实际在 OTN Framer芯片上, 可以不需要重 新组装成这样一个 OTUCiTG。
(2) 通过字节间插方法: 将 OTUCnAG的 4行, 第 5列作为 OTUC #5的 4行, 第 1列字节区域内容; 将 OTUCnAG的 4行, 第 6列作为 OTUC #6的 4行, 第 1列字节区域内容; 将 OTUCnAG的 4行, 第 7列作为 OTUC #7的 4行, 第 1列字节区域内容; 将 OTUCnAG的 4行, 第 8列作为 OTUC #8的 4行, 第 1列字节区域内容; 上述 4个 OTUC #5、 OTUC #6、 OTUC #7和 OTUC #8的第一列的 4行字节区域, 按照字节间插方法, 分别组成 OTUCjTG的第 1列, 第 2列、 第 3列和第 4列的 4行 字节区域, 组成一个逻辑的 OTUCjTG, 但实际在 OTN Framer芯片上, 可以不需要重 新组装成这样一个 OTUCjTG。
(3 ) 通过字节间插方法: 将 OTUCnAG的 4行, 第 9列作为 OTUC #9的 4行, 第 1列字节区域内容; 将 OTUCnAG的 4行, 第 10列作为 OTUC #10的 4行, 第 1列字节区域内容; 上述 2个 OTUC #9、 OTUC #10的第一列的 4行字节区域, 按照字节间插方法, 分别组成 OTUCpTG的第 1列, 第 2列的 4行字节区域, 组成一个逻辑的 OTUCpTG, 但实际在 OTN Framer芯片上, 可以不需要重新组装成这样一个 OTUCpTG。
(4) 通过字节间插方法: 将 OTUCnAG的 4行, 第 11列作为 OTUC #1的 4行, 第 2列字节区域内容; I OTUCnAG的 4行, 第 12列作为 OTUC #2的 4行, 第 2列字节区域内容; 将 OTUCnAG的 4行, 第 13列作为 OTUC #3的 4行, 第 2列字节区域内容; 将 OTUCnAG的 4行, 第 14列作为 OTUC #4的 4行, 第 2列字节区域内容; 上述 4个 OTUC #1、 OTUC #2、 OTUC #3和 OTUC #4的第 2列的 4行字节区域, 按照字节间插方法, 分别组成 OTUCiTG的第 5列, 第 6列、 第 7列和第 8列的 4行 字节区域, 组成一个逻辑的 OTUCiTG, 但实际在 OTN Framer芯片上, 可以不需要重 新组装成这样一个 OTUCiTG。
(5 ) 通过字节间插方法: I OTUCnAG的 4行, 負 15列作为 OTUC #5的 4行, 第 2列字节区域内容; 将 OTUCnAG的 4行, 第 16列作为 OTUC #6的 4行, 第 2列字节区域内容;
If OTUCnAG的 4行, 第 17列作为 OTUC #7的 4行, 第 2列字节区域内容; If OTUCnAG的 4行, 第 18列作为 OTUC #8的 4行, 第 2列字节区域内容; 上述 4个 OTUC #5、 OTUC #6、 OTUC #7和 OTUC #8的第 2列的 4行字节区域, 按照字节间插方法, 分别组成 OTUCjTG的第 5列, 第 6列、 第 7列和第 8列的 4行 字节区域, 组成一个逻辑的 OTUCjTG, 但实际在 OTN Framer芯片上, 可以不需要重 新组装成这样一个 OTUCjTG。
(6) 通过字节间插方法: 将 OTUCnAG的 4行, 第 19列作为 OTUC #9的 4行, 第 2列字节区域内容; 将 OTUCnAG的 4行, 第 20列作为 OTUC #10的 4行, 第 2列字节区域内容; 上述 2个 OTUC #9、 OTUC #10的第 2列的 4行字节区域, 按照字节间插方法, 分别组成 OTUCpTG的第 3列, 第 4列的 4行字节区域, 组成一个逻辑的 OTUCpTG, 但实际在 OTN Framer芯片上,可以不需要重新组装成这样一个 OTUCpTG。以此类推。 下面以 OTUCnAG反向复用到 OTUCiTG、 OTUCjTG和 OTUCpTG为例, 说明更 为通用的间插方法, OTUCnAG按顺序循环执行 k次下面的字节间插步骤, 循环变量 值从 1一直递增到 k, k取值为 4080, 4080为 OTUC的列数; i+j+p = n。 for (k=l, k++, k<=4080)
步骤 2.1 : 将 OTUCnAG的 4行, 第 10 (k-1 ) +1列作为 OTUC #1的 4行, 第 k列字节区域 内容; 将 OTUCnAG的 4行, 第 10 (k-1 ) +2列作为 OTUC #2的 4行, 第 k列字节区域 内容;
将 OTUCnAG的 4行, 第 10 (k-1 ) + (i-1 ) 列作为 OTUC # (i-1 ) 的 4行, 第 k 列字节区域内容; 将 OTUCnAG的 4行, 第 10 (k-1 ) +i列作为 OTUC #i的 4行, 第 k列字节区域 内容; 上述 i个 OTUC的第 k列的 4行字节区域(共 4个字节),按照顺序通过字节间插 方法,分别组成 OTUCiTG的 4行,从第 i*(k-l)+l列、第 i*(k-l)+2列,一直到第 i*(k-l)+i 列字节区域, 组成一个逻辑的 OTUCiTG, 但实际在 OTN Framer芯片上, 可以不需要 重新组装成这样一个 OTUCiTG。 在本实施例里。 也就是:
OTUC #1的 4行的第 k列字节内容(共 4个字节),组成 OTUCiTG的第 i*(k-l)+l 列;
OTUC #2的 4行的第 k列字节内容(共 4个字节),组成 OTUCiTG的第 i*Ck-l)+2 列;
OTUC #(i-l )的 4行的第 k列字节内容(共 4个字节),组成 OTUCiTG的第 i*(k-l)+ (i-1 ) 列;
OTUC #i的 4行的第 k列字节内容(共 4个字节), 组成 OTUCiTG的第 i*(k-l)+i 列; 所产生的每个 OTUC, 数据发送端在每个 OTUC帧的第一行的第 14列 (共一个 字节, 编号的最大值为 28, 也就是说最大编号值为 256) 填写一个 OTUC 的编号, 编号的值为 i, 比 如 0TUC #1的编号为 #1, OTUC #2的编号为 #2 , OTUC #(i-l )的编号为(i-1 ),
OTUC #i的编号为1。 以及可选地在每个 OTUC帧的第一行第 13列 (共一个字节, 编 号的最大值为 28, 也就是说最大编号值为 256)填写一个 OTUC #i所属 OTUCnAG的 标识, OTUCnAG里的所有 OTUC在该字段填写的值要求相同。 步骤 2.2: 将 OTUCnAG的 4行, 第 10 (k-1 ) +i+l列作为 OTUC # (i+1 ) 的 4行, 第 k列 字节区域内容; 将 OTUCnAG的 4行, 第 10 (k-1 ) +Ϊ+2列作为 OTUC # (i+2) 的 4行, 第 k列 字节区域内容;
将 OTUCnAG的 4行, 第 10 (k-1 ) +i+ (j-1 ) 列作为 OTUC # (i+j-1 ) 的 4行, 第 k列字节区域内容; 将 OTUCnAG的 4行, 第 10 (k-1 ) +i+j列作为 OTUC # (i+j ) 的 4行, 第 k列字 节区域内容; 上述 j个 OTUC的第 k列的 4行字节区域(共 4个字节),按照顺序通过字节间插 方法,分别组成 OTUCjTG的 4行,从第 j* (k-1 ) +1、第 j* (k-1 ) +2,一直到第 j*(k-l)+j 列字节区域, 组成一个逻辑的 OTUCjTG, 但实际在 OTN Framer芯片上, 并不需要重 新组装成这样一个 OTUCiTG。 在本实施例里。 也就是:
OTUC # (i+1 ) 的 4行的第 k列字节内容 (共 4个字节), 组成 OTUCiTG的第 j*(k-l)+l列;
OTUC # (i+2) 的 4行的第 k列字节内容 (共 4个字节), 组成 OTUCiTG的第 j*(k-l)+2列; OTUC # (i+j-1 ) 的 4行的第 k列字节内容 (共 4个字节), 组成 OTUCiTG的第 j*(k-l)+ (j-1 ) 列;
OTUC #( i+j )的 4行的第 k列字节内容 (共 4个字节),组成 OTUCiTG的第 j *(k- l)+j 列; 所产生的 j个 OTUC, 数据发送端在每个 OTUC帧的第一行的第 14列填写一个
OTUC # (i+j ) 的编号, 编号的值为 (i+j ), 比如 OTUC # (i+1 ) 的编号为# (i+1 ),
OTUC # (i+2) 的编号为# (i+2) , OTUC # (i+j-1 ) 的编号为 (i+j-l ), OTUC #
(i+j ) 的编号为 (i+j )。 以及可选地在每个 OTUC帧的第一行第 13列 (共一个字节, 编号的最大值为 28, 也就是说最大编号值为 256) 填写一个 OTUC #i所属 OTUCnAG 的标识, OTUCnAG里的所有 OTUC在该字段填写的值要求相同。 步骤 2.3 将 OTUCnAG的 4行, 第 10 (k-1 ) +i+j+l列作为 OTUC # (i+j+1 ) 的 4行, 第 k 列字节区域内容; 将 OTUCnAG的 4行, 第 10 (k-1 ) +i+j+2列作为 OTUC # (i+j+2) 的 4行, 第 k 列字节区域内容;
将 OTUCnAG的 4行, 第 10 (k-1 ) +i+j+ (p-1 ) 列作为 OTUC # (i+j+p-1 ) 的 4 行, 第 k列字节区域内容; 将 OTUCnAG的 4行, 第 10 (k-1 ) +i+j+p列作为 OTUC # (i+j+p) 的 4行, 第 k 列字节区域内容; 上述 p个 OTUC的第 k列的 4行字节区域 (共 4个字节), 按照顺序通过字节间 插方法, 分别组成 OTUCpTG的 4行, 从第 p* (k-1 ) +1、 第 p* (k-1 ) +2, 一直到第 p*(k-l)+p列字节区域, 组成一个逻辑的 OTUCpTG, 但实际在 OTN Framer芯片上, 并不需要重新组装成这样一个 OTUCpTG。 在本实施例里。 也就是: OTUC # (i+j+1 ) 的 4行的第 k列字节内容 (共 4个字节), 组成 OTUCiTG的第 p*(k-l)+l列;
OTUC # (i+j+2) 的 4行的第 k列字节内容 (共 4个字节), 组成 OTUCiTG的第 p*(k-l)+2列; OTUC # ( i+j+p- 1 ) 的 4行的第 k列字节内容 (共 4个字节), 组成 OTUCiTG的 第 p*(k-l)+ (p-1 ) 列;
OTUC # (i+j+p) 的 4行的第 k列字节内容 (共 4个字节), 组成 OTUCiTG的第 p*(k-l)+p列。 所产生的 p个 OTUC, 数据发送端在每个 OTUC帧的第一行的第 14列填写一个 OTUC # ( i+j+p)的编号,编号的值为(i+j+p),比如 OTUC # (i+j+l )的编号为# (1+」'+1 ),
OTUC # (i+j+2) 的编号为# (i+j+2) , OTUC # (i+j+p-1 ) 的编号为 (i+j+p-l ),
OTUC # (i+j+p)的编号为(i+j+p)。 以及可选第在每个 OTUC帧的第一行第 13列(共 一个字节, 编号的最大值为 28, 也就是说最大编号值为 256) 填写一个 OTUC #i所属 OTUCnAG的标识, OTUCnAG里的所有 OTUC在该字段填写的值要求相同。
步骤 3: 图 14是根据本发明实施例二的将 OTUCnAG拆分为多个 OTUCmTG后在光层进 行传送的处理方法的示意图, 如图 14所示, 步骤 2所产生的 n个 OTUC ( OTUC为速 率大小为 100Gbit/s, G.709所定义的 4*4080帧结构), OTUC #l、 OTUC #2 OTUC
# (i-1 ) 禾 B OTUC #i分别通过 i组 OTLC.m在光信号 OCh-P #1上进行传送; OTUC #
(i+l )、 OTUC # (i+2) OTUC # (i+j-1 )禾 B OTUC # (i+j )分别通过 j组 OTLC.m 在光信号 #2上进行传送; OTUC # (i+j+l )、 OTUC # (i+j+2) OTUC # (i+j+p-1 )、 OTUC # (i+j+p) 分别通过 p组 OTLC.m在光信号 #3上进行传送。 其中 OTLC.m速率 大小为 100Gbit/s, 分成 m个光传送通道来传输, 每个光传送通道速率大小为 100G除 以 m, 比如, 当 m取值为 4时, 光传送通道为 25G; 当 m取值为 2时, 光传送通道为 50G。 实施例三 如图 13和 14所示,本实施例提供了一种从光层接收实施例二所发送过来的数据, 并将数据从多个 OTUCmTG解映射和解复用出来, 形成 OTUCn和 ODUCn的方法。 它提供了在数据接送端, 接收来自于多个离散频谱光信号中的数据, 并将多个离散频 谱上的 OTUCmTG组装成一个完整的 OTUCn和 ODUCn帧的例子。 步骤 1 : 数据接收端将三个离散频谱 OCh-P #l, OCh-P #2, OCh-P #3的光信号所 承载的 10组 OTLC.m, 转换为 10个 OTUC帧, 每一个离散频谱所包含的多个 OTUC 帧, 逻辑上组成一个 OTUCmTG帧, 分别是 0TUCiTG、 OTUCjTG、 OTUCpTG。, 比 如, OTUCiTG中的 i取值为 4是, 表示包含 4个 OTUC帧, 分别是 OTUC #1、 OTUC #2、 OTUC #3和 OTUC #4; OTUCjTG中的 j取值为 4时, 表示包含 4个 OTUC帧, 分别是 OTUC #5、 OTUC #6、 OTUC #7和 OTUC #8, OTUCpTG中的 p取值为 2时, 表示包含 2个 OTUC帧,分别是 OTUC #9、OTUC #10。每个 OTUC帧是由一组 OTLC.m 转化而成。 步骤 2:数据接收端接收到 OTUC帧后,要根据该 OTUC帧中的路径跟踪标识 (Trail Trace Identifer, 简称为 ΤΉ), 或者 OTUC帧中的第一行第 13列所表示的 OTUCnAG 编号, 通过缓存器, 将相同的 ΤΉ或者相同 OTUCnAG编号的所有 OTUC帧接收完毕 后, 进行如下操作。 为了与实施例 4所产生的 OTUCnAG对应, 本实施例假设接收到 i+j+p (i+j+p=n)个 OTUC帧后, 根据每个 OTUC帧中的第一行、 第 14列携带的编号 值, 按照编号从小到大顺序, 以此执行下面的字节间插步骤。 该编号值为实施例 4在 发送 OTUC数据时候填写, 标识该 OTUC在 OTUCnAG中的编号。 在本实施例里, OTUC的编号从 1递增到 i+j+p, 下面的执行过程以 C语言的方式进行描述: for (k=l, k++, k<=4080)
for (x=l, x++, x<=i+j+p)
OTUC # x 帧的 4行,第 k列字节区域内容,通过字节间插方法,成为 OTUCnAG 帧的 4行, 第 (n*(k-l)+x)的字节区域内容。
上述执行过程完成后, 就形成了一个完整的 OTUCnAG 帧, 数据接收端从
OTUCnAG帧中 ODUCn帧进行处理。 综上所述, 通过本发明实施例, 采用将速率为 n*100吉比特每秒的 ODUCn加上 OTU 开销后的 OTUCnAG , 按照字节间插方式拆分为多个 OTUCmTG , 将每个 OTUCmTG分别映射进对应的 OCh中, 并将 OCh中的数据承载在一段连续的频序上 进行传送的方式, 解决了相关技术中引入灵活栅格技术后如何有效地进行数据的映射 和复用的问题, 使得运营商能够更加灵活地部署超 100G光传送系统, 提高了光纤频 谱利用效率以及系统的灵活性和兼容性。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而可以将 它们存储在存储装置中由计算装置来执行,或者将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限 制于任何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。 工业实用性 如上所述, 本发明实施例提供的一种数据的映射、 解映射方法及装置具有以 下有益效果: 使得运营商能够更加灵活地部署超 100G光传送系统, 提高了光纤频 谱利用效率以及系统的灵活性和兼容性。

Claims

权 利 要 求 书
1. 一种数据的映射方法, 包括:
将速率为 n*100吉比特每秒的光通道数据单元帧 ODUCn加上光通道传送 单元 OTU开销后的光通道传送单元管理组帧 OTUCnAG,按照字节间插方式拆 分为多个光通道传送单元传输组帧 OTUCmTG;
将每个所述 OTUCmTG分别映射进对应的光通道 OCh中, 并将所述 OCh 中的数据承载在一段连续的频序上进行传送;
其中,所述 OTUCnAG的速率为 n*100吉比特每秒,所述 OTUCmTG的速 率为 m*100吉比特每秒, m、 n均为正整数, m≤n。
2. 根据权利要求 1所述的方法, 其中, 将所述 OTUCnAG按照所述字节间插方式 拆分为多个所述 OTUCmTG包括:
将速率为 n*100吉比特每秒的所述 OTUCnAG拆分为 n个速率为 100吉比 特每秒的光通道传送单元子帧 OTUC;
将 n个所述速率为 100吉比特每秒的所述 OTUC分组, 组成速率不同或相 同的 L个所述 OTUCmTG;
其中, 所述速率为 n* 100吉比特每秒的所述 OTUCnAG的第 [n* (k-1 ) +i] 列字节区域内容作为第 i个所述速率为 100吉比特每秒的所述 OTUC的第 k列 字节区域内容,所述 OTUC的帧结构为 4行 4080列, n、 i、 k禾 B L均为正整数, 且 n>L, l<i<n, l≤k≤4080。
3. 根据权利要求 2所述的方法, 其中, 每个所述 OTUC的 OTU开销字节中携带 至少以下之一: 该 OTUC本身的编号、 该 OTUC所属所述 OTUCnAG的编号。
4. 根据权利要求 2所述的方法, 其中, 将每个所述 OTUCmTG分别映射进对应的 OCh中包括:
将每个所述 OTUCmTG分布到多个电通道信号上进行传输;
再将同一所述 OTUCmTG 对应的所述多个电通道信号映射进一个所述 OCh上进行传输;
其中, 同一所述 OTUCnAG下的所有所述 OTUCmTG对应的 OCh属于同 一个光通道管理组 OChAG。
5. 一种经权利要求 2或 3所述的数据的映射方法后的数据的解映射方法, 包括: 根据所述 OTUC的 OTU开销字节中的路径跟踪标识 TTI或者 OTUCnAG 编号,将相同的 ΤΉ或者相同的 OTUCnAG编号的所有所述 OTUC接收完毕后, 根据所述 OTUC所属 OTUCnAG的编号, 按照从小到大的顺序, 将每个所述 OTUC的第 k列字节区域内容作为解映射后 OTUCnAG的第 [n*(k-l)+x]列字节 区域内容;
其中, X为所述 OTUC在所述 OTUCnAG的编号, x为整数, l≤x≤n。
6. 一种经权利要求 4所述的数据的映射方法后的数据的解映射方法, 包括:
将接收到的一个所述 OTUCnAG中的每个 OCh的光信号分别转换为多组 电通道信号, 其中, 所述多组电通道信号中的每一组电通道信号转换为一个所 述 OTUC。
7. 一种光信号的发送节点, 包括- 映射模块,设置为将速率为 n*100吉比特每秒的光通道数据单元帧 ODUCn 加上光通道传送单元 OTU开销后的光通道传送单元管理组帧 OTUCnAG,按照 字节间插方式拆分为多个光通道传送单元传输组帧 OTUCmTG, 其中, 所述 OTUCnAG的速率为 n*100吉比特每秒, 所述 OTUCmTG的速率为 m*100吉 比特每秒, m、 n均为正整数, m≤n;
传送模块, 设置为将每个所述 OTUCmTG分别映射进对应的光通道 OCh 中, 并将所述 OCh中的数据承载在一段连续的频序上进行传送。
8. 根据权利要求 7所述的发送节点, 其中, 所述映射模块包括:
拆分单元, 设置为将速率为 n*100吉比特每秒的所述 OTUCnAG拆分为 n 个速率为 100 吉比特每秒的光通道传送单元子帧 OTUC, 其中, 所述速率为 n*100吉比特每秒的所述 OTUCnAG的第 [n* (k-1 ) +i]列字节区域内容作为第 i 个所述速率为 100吉比特每秒的所述 OTUC的第 k列字节区域内容,所述 OTUC 的帧结构为 4行 4080列, n、 i、 k和 L均为正整数, 且 n>L, l≤i≤n, l<k<4080; 分组单元, 设置为将 n个所述速率为 100吉比特每秒的所述 OTUC分组, 组成速率不同或相同的 L个所述 OTUCmTG。
9. 根据权利要求 7所述的发送节点, 其中, 所述传送模块包括: 复用单元,设置为将每个所述 OTUCmTG分布到多个电通道信号上进行传 输,再将同一所述 OTUCmTG对应的所述多个电通道信号映射进一个所述 OCh 上进行传输;其中,同一所述 OTUCnAG下的所有所述 OTUCmTG对应的 OCh 属于同一个光通道管理组 0ChAG。
10. 一种由权利要求 8所述的发送节点发送的光信号的接收节点, 包括- 解映射模块, 设置为根据所述 0TUC的 0TU开销字节中的路径跟踪标识 TTI或者 OTUCnAG编号, 将相同的 TTI或者相同的 OTUCnAG编号的所有所 述 OTUC接收完毕后, 根据所述 OTUC所属 OTUCnAG的编号, 按照从小到 大的顺序, 将每个所述 OTUC的第 k列字节区域内容作为解映射后 OTUCnAG 的第 [n*(k-l)+x]列字节区域内容; 其中, X为所述 OTUC在所述 OTUCnAG的 编号, X为整数, l≤x≤n。
11. 一种由权利要求 9所述的发送节点发送的光信号的接收节点, 包括- 解复用模块, 设置为将接收到的一个所述 OTUCnAG中的每个 OCh的光 信号分别转换为多组电通道信号, 其中, 所述多组电通道信号中的每一组电通 道信号转换为一个所述 OTUC。
12. 一种光信号的传送系统,包括权利要求 8所述的发送节点和权利要求 10所述的 接收节点, 或者权利要求 9所述的发送节点和权利要求 11所述的接收节点。
PCT/CN2014/072041 2013-02-18 2014-02-13 数据的映射、解映射方法及装置 WO2014124595A1 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10601514B2 (en) 2015-09-25 2020-03-24 Huawei Technologies Co., Ltd. Signal sending and receiving method, apparatus, and system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103595515B (zh) * 2012-08-13 2018-08-31 中兴通讯股份有限公司 光传送网的数据映射方法及装置
KR102310991B1 (ko) * 2014-03-26 2021-10-13 삼성전자주식회사 무선 통신 시스템에서 시간 분할 복신 및 주파수 복신 반송파 집성을 위한 신호 교환 장치 및 방법
CN106921436B (zh) * 2015-12-26 2019-11-05 华为技术有限公司 用于对多种速率的数据进行处理的方法及装置
CN108023660B (zh) * 2016-10-28 2019-07-19 深圳市中兴微电子技术有限公司 一种光传送网络业务接入方法及装置
CN114422284B (zh) * 2017-01-16 2022-10-28 中兴通讯股份有限公司 一种业务传递方法、设备及存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6724996B1 (en) * 1999-12-29 2004-04-20 Lucent Technologies Inc. Apparatus and method for providing optical channel overhead in optical transport networks
CN102511171A (zh) * 2011-11-15 2012-06-20 华为技术有限公司 在光传送网上传送业务数据的方法、装置和系统
US20120163812A1 (en) * 2010-12-22 2012-06-28 Electronics And Telecommunications Research Institute Method and apparatus for transmitting packet data over optical transport network
CN102870434A (zh) * 2012-06-14 2013-01-09 华为技术有限公司 传送、接收客户信号的方法和装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8045863B2 (en) * 2007-12-26 2011-10-25 Ciena Corporation Byte-interleaving systems and methods for 100G optical transport enabling multi-level optical transmission
CN101640568A (zh) * 2008-07-30 2010-02-03 华为技术有限公司 一种客户信号的发送、接收方法、装置和系统
CN102820951B (zh) * 2012-07-30 2016-12-21 华为技术有限公司 光传送网中传送、接收客户信号的方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6724996B1 (en) * 1999-12-29 2004-04-20 Lucent Technologies Inc. Apparatus and method for providing optical channel overhead in optical transport networks
US20120163812A1 (en) * 2010-12-22 2012-06-28 Electronics And Telecommunications Research Institute Method and apparatus for transmitting packet data over optical transport network
CN102511171A (zh) * 2011-11-15 2012-06-20 华为技术有限公司 在光传送网上传送业务数据的方法、装置和系统
CN102870434A (zh) * 2012-06-14 2013-01-09 华为技术有限公司 传送、接收客户信号的方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2958261A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10601514B2 (en) 2015-09-25 2020-03-24 Huawei Technologies Co., Ltd. Signal sending and receiving method, apparatus, and system
US11251875B2 (en) 2015-09-25 2022-02-15 Huawei Technologies Co., Ltd. Signal sending and receiving method, apparatus, and system
US11962349B2 (en) 2015-09-25 2024-04-16 Huawei Technologies Co., Ltd. Signal sending and receiving method, apparatus, and system

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CN103997388A (zh) 2014-08-20
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