WO2016095381A1 - Procédé et dispositif de transmission de service - Google Patents

Procédé et dispositif de transmission de service Download PDF

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Publication number
WO2016095381A1
WO2016095381A1 PCT/CN2015/076675 CN2015076675W WO2016095381A1 WO 2016095381 A1 WO2016095381 A1 WO 2016095381A1 CN 2015076675 W CN2015076675 W CN 2015076675W WO 2016095381 A1 WO2016095381 A1 WO 2016095381A1
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WO
WIPO (PCT)
Prior art keywords
service
rate
uplink
wavelength
olt
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PCT/CN2015/076675
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English (en)
Chinese (zh)
Inventor
何俊
李明生
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中兴通讯股份有限公司
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Publication date
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Publication of WO2016095381A1 publication Critical patent/WO2016095381A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a service transmission method and apparatus.
  • the PON system usually consists of an Optical Line Terminal (OLT) on the central office, an Optical Network Unit (ONU) on the user side, and an optical distribution network.
  • Optical Distribution Network (ODN) is usually composed of a point-to-multipoint network structure.
  • the next-generation passive optical network 2 adopts multiple wavelength stacking technologies, that is, one NG-PON2 physical interface of the OLT has multiple sets of wavelengths (ie, multiple wavelength components, ⁇ 1). - ⁇ 4), as shown in Figure 2.
  • a set of wavelengths includes an operating wavelength in the upstream direction (upstream wavelength, ⁇ u) and a corresponding operating wavelength in the downstream direction (downstream wavelength, ⁇ d); when the operating wavelength in the downlink direction is selected, corresponding to the uplink One or more operating wavelengths in the direction are also determined.
  • the operating wavelength in the upstream direction is selected, the operating wavelength corresponding to the downstream direction is also determined.
  • a certain wavelength in the uplink direction can be time-division multiplexed by multiple ONUs, and is also exclusively occupied by an ONU.
  • P2P point-to-point
  • Different groups of wavelengths are usually used to carry different services, and can also carry the same service through some multiplexing mode.
  • CPRI Common Public Radio Interface
  • 4G fourth-generation communication technology
  • CPRI line bit rate option 2 1228.8 Mbit/s, 8B/10B line coding (2x 491.52 x 10/8 Mbit/s)
  • CPRI line bit rate option 3 2457.6 Mbit/s, 8B/10B line coding (4x 491.52 x 10/8 Mbit/s)
  • CPRI line bit rate option 4 3072.0 Mbit/s, 8B/10B line coding (5x 491.52 x 10/8 Mbit/s)
  • CPRI line bit rate option 6 6144.0 Mbit/s, 8B/10B line coding (10x 491.52 x 10/8 Mbit/s)
  • CPRI line bit rate option 7 9830.4Mbit/s, 8B/10B line coding (16x 491.52x 10/8Mbit/s)
  • CPRI line bit rate option 8 10137.6 Mbit/s, 64B/66B line coding (20x 491.52 x 66/64 Mbit/s).
  • the option 8 type unidirectional rate is 10.1376 gigabits per second (Gbit/s), which exceeds the maximum unidirectional bearer rate of 10 Gbit/s of the upstream wavelength in a group of wavelengths in NG-PON2, so it is currently impossible to
  • the P2P type ONU accessed through the NG-PON2 carries the CPRI service.
  • the main technical problem to be solved by the embodiment of the present invention is to provide a service transmission method and device, which can solve the technical problem that the P2P type ONU that is accessed through the NG-PON2 cannot carry the CPRI service.
  • the embodiment of the present invention provides a service transmission method, which is applied to a P2P type ONU that is accessed by the NG-PON2, and includes the following steps:
  • the rate of the service is greater than the maximum bearer rate of the uplink wavelength of the NG-PON2, determine the number of uplink wavelengths required to carry the service according to the rate of the service and the maximum bearer rate, where the quantity is greater than Or equal to 2;
  • the service is sent to the OLT using the number of upstream wavelengths.
  • the step of determining, according to the rate of the service and the maximum bearer rate, the number of uplink wavelengths required to carry the service includes:
  • the step of transmitting the service to the OLT by using the quantity of the uplink wavelength includes:
  • the sub-services are identified and sent to the OLT through a selected upstream wavelength.
  • the service includes: a CPRI service.
  • the method further includes: receiving service data sent by the OLT through the quantity of downlink wavelengths, and then recovering the received service data.
  • the method further includes: when the rate of the service is less than or equal to a maximum bearer rate of one uplink wavelength in the NG-PON2, sending the service to the OLT by using an uplink wavelength.
  • the embodiment of the present invention further provides a service transmission apparatus, which is applied to a P2P type ONU that is accessed by the NG-PON2, and includes: a detection module, a service processing module, and a service sending module:
  • the detecting module is configured to detect a rate of the service accessed by the ONU;
  • the service processing module is configured to determine, according to the rate of the service and the maximum bearer rate, an uplink required to carry the service, if the rate of the service is greater than a maximum bearer rate of an uplink wavelength in the NG-PON2 The number of wavelengths, the number being greater than or equal to 2;
  • the service sending module is configured to send the service to the OLT by using the quantity of the uplink wavelength.
  • the service processing module is configured to determine, according to the rate of the service and the maximum bearer rate, a minimum number of uplink wavelengths required to carry the service.
  • the sending module is configured to:
  • the sub-services are identified and sent to the OLT through a selected upstream wavelength.
  • the service sending module is further configured to send the service to the OLT by using an uplink wavelength when the rate of the service is less than or equal to a maximum bearer rate of an uplink wavelength in the NG-PON2.
  • the embodiment of the present invention provides a service transmission method and device, which can implement the NG-PON2 technology to carry the CPRI service.
  • the service transmission method provided by the embodiment of the present invention is applied to the P2P type ONU accessed by the NG-PON2, including: detecting The rate of the service that is accessed by the ONU. If the rate of the service is greater than the maximum bearer rate of the uplink wavelength of the NG-PON2, the uplink required to carry the service is determined according to the rate of the service and the maximum bearer rate.
  • the service of the maximum bearer rate is sent to the OLT, that is, the service of the embodiment of the present invention is used when the service is a CPRI option 8 type service, for example, when the service is a CPRI option 8 type service.
  • the method can send the service to the OLT by using multiple uplink wavelengths, and implement the P2P type ONU that is accessed through the NG-PON2 to carry the CPRI service.
  • FIG. 1 is a schematic structural diagram of a PON network
  • FIG. 2 is a schematic diagram of a NG-PON2 network structure
  • FIG. 3 is a schematic flowchart of a service transmission method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic flowchart of a service sending process according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural diagram of a service transmission apparatus according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of an ONU according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • this embodiment provides a service transmission method, which is applied to a P2P type ONU that is accessed by the NG-PON2, and includes the following steps:
  • Step 301 Detect the rate of the service accessed by the ONU.
  • the ONU is generally connected to the service through the user network side interface (User Netwoks Interface, UNI interface) module. Therefore, the UNI interface rate can be detected here.
  • the user network side interface User Netwoks Interface, UNI interface
  • Step 302 Determine, according to the rate of the service and the maximum bearer rate, the number of uplink wavelengths required to carry the service, where the rate of the service is greater than the maximum bearer rate of one uplink wavelength in the NG-PON2. The number is greater than or equal to 2.
  • This step is a process of determining the number of uplink wavelengths.
  • the rate is 10.1376 Gbit/s
  • the maximum bearer rate of an uplink wavelength is 10 Gbit/s.
  • the service rate and NG-PON 2 it is determined that the number of uplink wavelengths required to carry the service of the CPRI option 8 type is two or more, because the sum of the maximum bearer rates of the two or more uplink wavelengths is greater than 10.1376 Gbit/s, which satisfies the service rate. demand.
  • the minimum number of uplink wavelengths required to carry the service may be determined according to the rate of the service and the maximum bearer rate. For example, when the service is a CPRI option 8 type service, the number of uplink wavelengths may be determined to be 2 or more, and the minimum number is 2, so that the method in this embodiment can use two sets of wavelength resources in the uplink and downlink directions. It satisfies all the CPRI data services and P2P channel management services.
  • Step 303 Send the service to the OLT by using the quantity of the uplink wavelength.
  • the service transmission method in this embodiment can send a service with a rate higher than the maximum carrier rate of the uplink wavelength in the NG-PON2 to the OLT by using the uplink wavelength multiplexing mode, that is, using multiple uplink wavelengths, the rate is greater than the maximum carrier capacity of the uplink wavelength in the NG-PON2.
  • the rate of the service is sent to the OLT.
  • the method in the embodiment of the present invention can send the service to the OLT by using multiple uplink wavelengths, and implement the P2P type ONU to carry the CPRI through the NG-PON2. business.
  • the foregoing step 303 is a process of sending a service, and specifically includes:
  • Step 401 Select the number of upstream wavelengths.
  • the ONU After determining the quantity, it is necessary to select a certain number of upstream wavelengths, here mainly by the identification of the upstream wavelength to select the idle upstream wavelength. For example, when the number is determined to be 2, the ONU can be from a plurality of upstream wavelengths. Two idle upstream wavelengths are selected to carry the service.
  • the execution body of this step may be a management object module in the ONU, a management object module, a management function of the entire P2P type ONU, and control communication with the OLT.
  • Step 402 Divide the service into the quantity of sub-services.
  • a plurality of uplink wavelengths are used to carry one service. Therefore, the service needs to be divided into a corresponding number of sub-services, and then all the sub-services are sent to the OLT, that is, the service is sent.
  • the number of sub-services is equal to the number of uplink wavelengths required for the uplink wavelength of the bearer service. For example, when the number of uplink wavelengths is 2, the service can be divided into two sub-services.
  • Step 403 Identify the sub-service and send it to the OLT through a selected uplink wavelength.
  • each sub-service needs to be identified. After receiving the sub-service, the OLT can restore the original service according to the identifier of the sub-service.
  • the service received by the UNI interface module that is, the service accessed by the ONU, can be divided into sub-services with the same number of uplink wavelengths, and then each sub-service and the management object module are correspondingly managed.
  • the signal is encapsulated as a Pseudo-Wire Emulation Edge to Edge (PWE3) service packet.
  • PWE3 Pseudo-Wire Emulation Edge to Edge
  • a PW label is stored in the PWE3 service header to identify the service packet.
  • the management signal includes a wavelength identifier assigned by the management object module to the sub-service.
  • the service packet may be sent to the OLT according to the wavelength identifier, for example, by using a hash (HASH) algorithm to map the corresponding wavelength. aisle.
  • HASH hash
  • the OLT supporting the NG-PON2 After receiving the services of multiple upstream wavelengths on the PON port, the OLT supporting the NG-PON2 processes one or more groups of services independently according to the normal processing principle, and sends them to the wavelength channel uplink board through the OLT switching network.
  • the uplink board is sent to the network to the network side interface (Network to Network Interface, referred to as NNI interface) according to the PW label of the PWE3 and recovers the service signal (for example, the CPRI signal).
  • NNI interface Network to Network Interface
  • the service transmission method in this embodiment may further include a process of processing downlink data, specifically:
  • the ONU can restore the original service data according to the identifier of the received service packet. For example, when the OLT sends service data through the PWE3 service packet, the ONU can perform service recovery according to the PW Label of the service packet.
  • the service transmission method in this embodiment may send the service to the OLT by using an uplink wavelength.
  • the service rate is less than the maximum bearer rate of the uplink wavelength. transmission.
  • the service speed is greater than the maximum bearer speed of the uplink wavelength.
  • multiple uplink wavelengths need to be determined to carry the uplink and downlink transmissions of the service completion service. wavelength.
  • the method in this embodiment overcomes the problem that the rate of the CPRI option 8 type exceeds the uplink wavelength bearer rate in the NG-PON 2 in the prior art, and provides a method for using the NG-PON 2 technology by using multiple uplink wavelength multiplexing modes. Hosts CPRI option8 type services.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the present embodiment provides a service transmission apparatus, which is applied to a P2P type ONU that is accessed by the NG-PON2, as shown in FIG. 5, and includes: a detection module 501, a service processing module 502, and a service sending module 503;
  • the detecting module 501 is configured to detect a rate of services accessed by the ONU;
  • the service processing module 502 is configured to determine, according to the rate of the service and the maximum bearer rate, the bearer of the service, if the rate of the service is greater than a maximum bearer rate of an uplink wavelength in the NG-PON2 The number of upstream wavelengths, the number being greater than or equal to 2;
  • the service sending module 503 is configured to send the service to the OLT by using the quantity of the uplink wavelength.
  • the service transmission device of the embodiment of the present invention may send a service with a rate higher than the maximum carrier rate of the uplink wavelength in the NG-PON2 to the OLT by using the uplink wavelength multiplexing mode, that is, using multiple uplink wavelengths, the rate is greater than the uplink wavelength of the NG-PON2.
  • the service carrying the rate of the industry is sent to the OLT; for example, when the service is CPRI option8
  • the device in the embodiment of the present invention may send the service to the OLT by using multiple uplink wavelengths, and implement the P2P type ONU that is accessed through the NG-PON2 to carry the CPRI service.
  • the service processing module 502 is configured to determine a minimum number of uplink wavelengths required to carry the service according to the rate of the service and the maximum bearer rate.
  • the sending module 503 is configured to:
  • the sub-services are identified and sent to the OLT through a selected upstream wavelength.
  • the service sending module 503 is further configured to send the service to the OLT by using one uplink wavelength if the rate of the service is less than or equal to the maximum bearer rate of one uplink wavelength in the NG-PON2.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment specifically describes the specific application of the service transmission method in the P2P type ONU, as shown in FIG. 6, including:
  • the UNI interface module 601 is configured to access the CPRI service (specifically, accessing the CPRI option8 in this embodiment)
  • the service processing module 602 performs service processing on the CPRI service, which is the same as the prior art.
  • a submodule E module is added to the module, that is, a rate adaptation and a service simulation module. The core functions of this submodule are described in detail below.
  • the management object module 604 is responsible for the management function of the entire P2P type ONU, monitors the rate of the A module, determines whether to enable the E module function and determines the working module of the D module; by monitoring the rate mode of the A module, 1) determining whether to enable the E module function 2) Determine the working module of the D module.
  • the Turning Laser module 605 is responsible for adapting to the working wavelength of the OLT (the adaptation mode may be determined by the OLT issuing a command or may be determined by the OLT and the ONU), and most of them are the same as the prior art.
  • the new function is as follows: the module works with the OLT in a set of wavelength states by default, or in the configuration of the management object module 604, simultaneously works with the OLT in two wavelength states that do not interfere with each other.
  • the rate adaptation and service simulation module 603 is a core module of the embodiment of the present invention.
  • the main functions are as follows:
  • the rate of the UNI interface is detected.
  • the maximum rate of the uplink wavelength is used to adapt the UNI interface rate.
  • the UNI interface rate is commonly used by using two or more uplink wavelengths.
  • the ONU selects the minimum number of wavelengths for multiplexing based on the UNI interface rate. For example, when carrying a high-speed service of CPRI option8, two sets of wavelength resources can be used to meet the needs of carrying one CPRI data service and P2P channel management service in the uplink and downlink directions;
  • the service emulation function is configured to encapsulate the services received by the UNI interface module 601, such as the CPRI signal, and the management signal generated by the management object module 604 into a PWE3 mode, and map the HW algorithm to the uplink multiple groups according to the PW label in the PWE3 service header.
  • the OLT of the NG-PON2 receives the multi-wavelength service on the PON port, and processes one or more groups of services independently according to the normal processing principle, and sends the uplink to the wavelength channel through the OLT switching network.
  • the board and the wavelength channel uplink board pass the internal rate adaptation service emulation module, and sort and restore the CPRI signal to the NNI interface according to the PW label of the PWE3.
  • the downlink service is reversely processed on the rate adaptation service emulation module of the ONU, and one or more (if any) wavelength models sent by the OLT are subjected to PW Label sorting and service recovery, and then sent to the UNI interface module 601.
  • the ONU discovery process module 606 is an ONU universal module configured to discover the discovery and registration process of the ONU in the ONU.
  • the method of the embodiment of the present invention can send the service to the OLT by using multiple uplink wavelengths, and implement the P2P type ONU that is accessed by the NG-PON2 to carry the CPRI service.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un procédé et un dispositif de transmission de service. Le procédé de transmission de service décrit dans la présente invention est appliquée à une unité de réseau optique (ONU) P2P accédée sur un réseau optique passif 2 de prochaine génération (NG-PON2). Le procédé consiste à : détecter le débit d'un service accédé via l'ONU ; lorsque le débit du service est supérieur à un débit de transport maximal d'une longueur d'onde de liaison montante dans le NG-PON2, déterminer, d'après le débit du service et le débit de transport maximal, un nombre des longueurs d'onde de liaison montante nécessaire pour transporter le service, le nombre étant supérieur ou égal à deux ; et utiliser le nombre de longueurs d'onde de liaison montante pour transmettre le service à un terminal de ligne optique (OLT). Le procédé de transmission de service décrit dans un mode de réalisation de la présente invention peut transporter un service d'interface radioélectrique publique commune (CPRI) selon une technologie NG-PON2.
PCT/CN2015/076675 2014-12-18 2015-04-15 Procédé et dispositif de transmission de service WO2016095381A1 (fr)

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CN201410797455.0 2014-12-18
CN201410797455.0A CN105763963A (zh) 2014-12-18 2014-12-18 一种业务传输方法和装置

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TWI629876B (zh) * 2016-11-30 2018-07-11 中華電信股份有限公司 An elastic physical layer grid optical network interactive operation transmission device for switching and converting an upstream optical wavelength of a plurality of optical network units into a specified optical wavelength of NG-PON2
CN108521617B (zh) * 2018-06-26 2020-10-23 瑞斯康达科技发展股份有限公司 一种业务路由发现方法和装置、计算机可读存储介质

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