WO2016095381A1 - 一种业务传输方法和装置 - Google Patents

一种业务传输方法和装置 Download PDF

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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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service
rate
uplink
wavelength
olt
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PCT/CN2015/076675
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English (en)
French (fr)
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何俊
李明生
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems

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  • 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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Abstract

本发明公开了一种业务传输方法和装置。本发明提供的业务传输方法，应用于NG-PON2接入的P2P型ONU，包括：检测ONU接入的业务的速率；在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2；采用所述数量的上行波长将所述业务发送给OLT；本发明实施例的业务传输方法可以实现使用NG-PON2技术承载CPRI业务。

Description

一种业务传输方法和装置 技术领域
本发明涉及光通信技术领域，尤其一种业务传输方法和装置。
背景技术
随着网络技术的发展，可以利用网络传输大量的语音、数据、视频等业务，因此对带宽的要求不断提高，无源光网络(Passive Optical Network，简称为PON)就是在这种需求下产生的。PON***的拓扑结构如图1所示，PON***通常由局侧的光线路终端(Optical Line Terminal，简称为OLT)、用户侧的光网络单元(Optical Network Unit，简称为ONU)和光分配网络(Optical Distribution Network，简称为ODN)组成，通常采用点到多点的网络结构。
基于传统PON网络结构的基础上，下一代无源光网络2(NG-PON2)采用多个波长堆叠技术，即OLT的一个NG-PON2物理接口有多组波长组成(即多个波长组成，λ1-λ4)，如图2所示。在NG-PON2中一组波长包括上行方向的工作波长(上行波长、λu)和与其对应的下行方向的工作波长(下行波长、λd)；当下行方向的工作波长选定后，与之对应上行方向的一个或多个工作波长也会确定下来，同样上行方向的工作波长选定后，则对应下行方向的工作波长也确定下来。上行方向的某一个波长可以由多个ONU时分复用，也由某个ONU独占。独占某个一个波长或多个的ONU，一般称为点到点(P2P)型ONU。
不同组的波长，通常分别用来承载不同的业务，也可通过某种复用方式，来承载相同的业务。
现有的用于承载***通信技术(4G)业务的CPRI(Common Public Radio Interface，通用公共无线电接口)通道，共有以下8组速率类型：
CPRI line bit rate option 1:614.4Mbit/s,8B/10B line coding(1x 491.52x 10/8Mbit/s)
CPRI line bit rate option 2:1228.8Mbit/s,8B/10B line coding(2x 491.52x 10/8Mbit/s)
CPRI line bit rate option 3:2457.6Mbit/s,8B/10B line coding(4x 491.52x 10/8Mbit/s)
CPRI line bit rate option 4:3072.0Mbit/s,8B/10B line coding(5x 491.52x 10/8Mbit/s)
CPRI line bit rate option 5:4915.2Mbit/s,8B/10B line coding(8x 491.52x 10/8Mbit/s)
CPRI line bit rate option 6:6144.0Mbit/s,8B/10B line coding(10x 491.52x 10/8Mbit/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 8:10137.6Mbit/s,64B/66B line coding(20x 491.52x66/64Mbit/s)。
可以看出，其中选项(option)8类型单向速率为10.1376吉比特每秒(Gbit/s)，超过NG-PON2里一组波长中上行波长的最大单向承载速率10Gbit/s，因此目前无法实现通过NG-PON2接入的P2P型ONU承载CPRI业务。
发明内容
本发明实施例要解决的主要技术问题是，提供一种业务传输方法和装置，能够解决目前无法实现通过NG-PON2接入的P2P型ONU承载CPRI业务的技术问题。
为解决上述技术问题，本发明实施例提供一种业务传输方法，应用于NG-PON2接入的P2P型ONU，包括如下步骤：
检测ONU接入的业务的速率；
在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2；
采用所述数量的上行波长将所述业务发送给OLT。
进一步地，所述根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量的步骤包括：
根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的最少数量。
进一步地，所述采用所述数量的上行波长将所述业务发送给OLT的步骤包括：
选定所述数量的上行波长；
将所述业务划分为所述数量的子业务；
对所述子业务进行标识，并通过一个选定的上行波长发送给OLT。
进一步地，所述业务包括：CPRI业务。
进一步地，所述方法还包括：接收OLT通过所述数量的下行波长发送的业务数据，然后对接收到的业务数据进行恢复。
进一步地，所述方法还包括：在所述业务的速率小于等于NG-PON2中一个上行波长的最大承载速率的情况下，采用一个上行波长将所述业务发送给OLT。
同样为了解决上述技术问题，本发明实施例还提供了一种业务传输装置，应用于NG-PON2接入的P2P型ONU，包括：检测模块、业务处理模块和业务发送模块：
所述检测模块，设置为检测ONU接入的业务的速率；
所述业务处理模块，设置为在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2；
所述业务发送模块，设置为采用所述数量的上行波长将所述业务发送给OLT。
进一步地，所述业务处理模块，设置为根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的最少数量。
进一步地，所述发送模块，设置为：
选定所述数量的上行波长；
将所述业务划分为所述数量的子业务；
对所述子业务进行标识，并通过一个选定的上行波长发送给OLT。
进一步地，所述业务发送模块，还设置为在所述业务的速率小于等于NG-PON2中一个上行波长的最大承载速率的情况下，采用一个上行波长将所述业务发送给所述OLT。
本发明实施例的有益效果是：
本发明实施例提供了一种业务传输方法和装置，可以实现使用NG-PON2技术承载CPRI业务；本发明实施例提供的业务传输方法，应用于NG-PON2接入的P2P型ONU，包括：检测ONU接入的业务的速率；在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2；采用所述数量的上行波长将所述业务发送给OLT；本发明实施例的业务传输方法可以通过波长复用方式将速率大于NG-PON2中上行波长最大承载业速率的业务发送给OLT，即采用多个上行波长将速率大于NG-PON2中上行波长最大承载业速率的业务发送给OLT；例如当业务为CPRI option8类型业务时，本发明实施例的方法可以采用多个上行波长将该业务发送给OLT，实现了通过NG-PON2接入的P2P型ONU承载CPRI业务。
附图说明
图1为一种PON网络结构示意图；
图2为一种NG-PON2网络结构示意图；
图3为本发明实施例一提供的一种业务传输方法的流程示意图；
图4为本发明实施例一提供的一种业务发送过程的流程示意图；
图5为本发明实施例二提供的一种业务传输装置的结构示意图；
图6为本发明实施例三提供的一种ONU结构示意图。
具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。
实施例一：
考虑到现有技术中存在的CPRI option8类型速率超过NG-PON2里一个上行波长承载速率导致的无法实现通过NG-PON2接入的P2P型ONU承载CPRI业务问题，如 图3所示，本实施例提供了一种业务传输方法，应用于NG-PON2接入的P2P型ONU，包括如下步骤：
步骤301：检测ONU接入的业务的速率。
ONU一般通过用户网络侧接口(User Netwoks Interface，简称为UNI接口)模块接入业务的，所以这里可以检测UNI接口速率。
步骤302：在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2。
本步骤是确定上行波长数量的过程，例如当业务为CPRI option8类型业务时，其速率为10.1376Gbit/s，而一个上行波长的最大承载速率为10Gbit/s根据业务的速率和NG-PON2中，此时可以确定承载CPRI option8类型业务所需上行波长的数量为2个或者2个以上，因为2个或者2个以上的上行波长的最大承载速率之和是大于10.1376Gbit/s，满足业务的速率需求。
考虑到节省上行波长资源，优先地，本步骤可以根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的最少数量。例如，当业务为CPRI option8类型业务时，可以确定上行波长的数量为2个或者2个以上，而最少数量为2，这样本实施例方法就可以使用两组波长资源即可在上行和下行方向满足承载一路CPRI数据业务和P2P通道管理业务的。
步骤303：采用所述数量的上行波长将所述业务发送给OLT。
本实施例业务传输方法可以通过上行波长复用方式将速率大于NG-PON2中上行波长最大承载业速率的业务发送给OLT，即采用多个上行波长将速率大于NG-PON2中上行波长最大承载业速率的业务发送给OLT；例如当业务为CPRI option8类型业务时，本发明实施例的方法可以采用多个上行波长将该业务发送给OLT，实现了通过NG-PON2接入的P2P型ONU承载CPRI业务。
上述步骤303为发送业务的过程，具体地可以包括：
步骤401：选定所述数量的上行波长。
在确定数量之后，就需要选定确定数量的上行波长，这里主要是通过上行波长的标识来选定空闲的上行波长。例如当确定数量为2之后，ONU可以从众多上行波长中 选取两个空闲的上行波长用以承载业务。本步骤的执行主体可以为ONU中的管理对象模块，管理对象模块，负责整个P2P型ONU的管理功能，以及控制与OLT之间的通信。
步骤402：将所述业务划分为所述数量的子业务。
由于本实施例是采用多个上行波长承载一个业务，所以需要对业务进行划分，将其划分为对应数量的子业务，然后将子业务全部发送给OLT，即完成了业务的发送。
本实施例中子业务数量是与承载业务上行波长所需的上行波长数量相等的，例如当上行波长数量为2时，就可以将业务划分为两个子业务。
步骤403：对所述子业务进行标识，并通过一个选定的上行波长发送给OLT。
为了能够使得OLT端能够恢复出原始业务，还需要对每个子业务进行标识，这样在OLT接收到子业务后，可以根据子业务的标识恢复成原始的业务。
在实际应用中，在ONU上行方向，可将UNI接口模块接收的业务，即ONU接入的业务，划分成与上行波长数量相等的子业务，然后将每个子业务和管理对象模块产生对应的管理信号封装为边缘到边缘的伪线仿真(Pseudo-Wire Emulation Edge to Edge，简称为PWE3)业务包，在PWE3业务包头里存在伪线标签(PW label)，用于标识业务包。其中管理信号包括管理对象模块分配给该子业务的波长标识，在业务发送时，可以根据波长标识采用对应的上行波长将业务包发送给OLT，例如通过哈希(HASH)算法映射到对应的波长通道。
支持NG-PON2的OLT在PON口接收到多路上行波长的业务后，按照正常的处理原则，将一组或多组业务分别独立处理，通过OLT交换网送给波长通道上联板，波长通道上联板通过内部的速率适配业务仿真模块，根据PWE3的PW label排序并恢复出业务信号(例如CPRI信号)送给网络到网络侧接口(Network to Network Interface，简称为NNI接口)。
在NG-PON2中，当上行方向的工作波长确定后，与之对应下行方向的工作波长也会确定下，因此，在上行方向ONU采用多个上行波长发送上行业务，在下行方向OLT也同样会采用多个上行波长发送下行业务，且下行波长数量与上行波长数量相同。所以，本实施例的业务传输方法，还可以包括对下行数据处理的过程，具体包括：
接收OLT通过所述数量的下行波长发送的业务数据，然后对接收到的业务数据进行恢复。
同样为了使得ONU能够准确恢复业务，在OLT端一般会标识业务，所以在ONU这端可以根据接收到业务包的标识恢复出原始业务数据。例如，当OLT通过PWE3业务包方式发送业务数据时，同理，在ONU这端可以根据业务包的PW Label进行业务恢复。
上述主要介绍的是当业务的速率大于NG-PON2中一个上行波长的最大承载速率时具体处理过程，在上述方法基础上，在所述业务的速率小于等于NG-PON2中一个上行波长的最大承载速率情况下，本实施例业务传输方法可以采用一个上行波长将所述业务发送给OLT。
以CPRI业务为例，当ONU接入的业务为CPRI option1-7类型业务时，由于业务速率小于一个上行波长的最大承载速率，此时只需采用一个上行波长承载业务即可完成业务的上下行传输。
而当ONU接入的业务为CPRI option8类型业务时，由于业务速度大于一个上行波长最大承载速度率，此时就需要确定多个上行波长来承载业务完成业务的上下行传输，这里优先两组上行波长。
本实施例方法克服了现有技术中存在的CPRI option8类型速率超过NG-PON2里一个上行波长承载速率的问题，提供一种通过使用多个上行波长复用的方式，从而实现使用NG-PON2技术承载CPRI option8类型业务。
实施例二：
本实施例提供了一种业务传输装置，应用于NG-PON2接入的P2P型ONU，如图5所示，包括：检测模块501、业务处理模块502和业务发送模块503；
所述检测模块501，设置为检测ONU接入的业务的速率；
所述业务处理模块502，设置为在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2；
所述业务发送模块503，设置为采用所述数量的上行波长将所述业务发送给OLT。
本发明实施例的业务传输装置可以通过上行波长复用方式将速率大于NG-PON2中上行波长最大承载业速率的业务发送给OLT，即采用多个上行波长将速率大于NG-PON2中上行波长最大承载业速率的业务发送给OLT；例如当业务为CPRI option8 类型业务时，本发明实施例的装置可以采用多个上行波长将该业务发送给OLT，实现了通过NG-PON2接入的P2P型ONU承载CPRI业务。
优先地，所述业务处理模块502，设置为根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的最少数量。
优先地，所述发送模块503，设置为：
选定所述数量的上行波长；
将所述业务划分为所述数量的子业务；
对所述子业务进行标识，并通过一个选定的上行波长发送给OLT。
优先地，所述业务发送模块503，还设置为在所述业务的速率小于等于NG-PON2中一个上行波长的最大承载速率的情况下，采用一个上行波长将所述业务发送给所述OLT。
实施例三：
本实施例具体介绍业务传输方法在P2P型ONU中的具体应用，如图6所示，包括：
UNI接口模块601、业务处理模块602、管理对象模块603、Turning Laser(可变波长激光器)605、速率适配和业务仿真模块603、ONU发现流程模块606。
各模块功能及相互关系如下：
UNI接口模块601，设置为接入CPRI业务(本实施例中特指接入CPRI option8
类型业务)。
业务处理模块602，对CPRI业务进行业务处理，与现有技术相同。其中本模块内部新增子模块E模块，即速率适配和业务仿真模块。该子模块的核心功能在下面详细说明
管理对象模块604，负责整个P2P型ONU的管理功能，监测A模块的速率，决定是否启用E模块功能和决定D模块的工作模块；通过监测A模块的速率模式，1)决定是否启用E模块功能；2)决定D模块的工作模块。
激光转换(Turning Laser)模块605，负责与OLT的工作波长适配(适配方式可以由OLT下发命令决定，也可以由OLT与ONU协商决定)，大部分与现有技术相同。新增功能为：本模块默认与OLT工作在一组波长状态，也可以在管理对象模块604的配置下，与OLT同时工作在两组互不干涉的波长状态。
速率适配和业务仿真模块603，本模块为本发明实施例的核心模块，主要功能为：
检测UNI接口速率，默认使用一个上行波长的最大速率适配UNI接口速率，也可在管理对象模块604的配置下，使用二个或多个上行波长共同适配UNI接口速率。从节省波长资源考虑，ONU在满足大于等于UNI接口速率的基础上，选取最少数量的波长进行复用。如在承载一路CPRI option8高速业务时，使用两组波长资源即可在上行和下行方向满足承载一路CPRI数据业务和P2P通道管理业务的需要；
业务仿真功能，上行将UNI接口模块601接收的业务，如CPRI信号，和管理对象模块604产生的管理信号封装为PWE3方式，根据PWE3业务包头里的PW label，通过HASH算法映射到上行的多组波长通道；这样使得支持NG-PON2的OLT在PON口接收到多路波长的业务后，按照正常的处理原则，将一组或多组业务分别独立处理，通过OLT交换网送给波长通道上联板，波长通道上联板通过内部的速率适配业务仿真模块，根据PWE3的PW label排序并恢复出CPRI信号送给NNI接口。
下行业务在ONU的速率适配业务仿真模块上反向处理，将OLT送过来的一个或多个(如果有)波长型号进行PW Label排序和业务恢复然后送给UNI接口模块601。
ONU发现流程模块606为ONU通用模块，设置为发现ONU中ONU的发现和注册流程。
工业实用性：通过上述描述可知，本发明实施例的方法可以采用多个上行波长将该业务发送给OLT，实现了通过NG-PON2接入的P2P型ONU承载CPRI业务。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。

Claims (10)

  1. 一种业务传输方法，应用于NG-PON2接入的P2P型ONU，包括如下步骤：
    检测ONU接入的业务的速率；
    在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2；
    采用所述数量的上行波长将所述业务发送给OLT。
  2. 如权利要求1所述的业务传输方法，其中，所述根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量的步骤包括：
    根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的最少数量。
  3. 如权利要求1所述的业务传输方法，其中，所述采用所述数量的上行波长将所述业务发送给OLT的步骤包括：
    选定所述数量的上行波长；
    将所述业务划分为所述数量的子业务；
    对所述子业务进行标识，并通过一个选定的上行波长发送给OLT。
  4. 如权利要求1-3任一项所述的业务传输方法，其中，所述业务包括：CPRI业务。
  5. 如权利要求1-3任一项所述的业务传输方法，其中，还包括：
    接收OLT通过所述数量的下行波长发送的业务数据，然后对接收到的业务数据进行恢复。
  6. 如权利要求1-3任一项所述的业务传输方法，其中，还包括：在所述业务的速率小于等于NG-PON2中一个上行波长的最大承载速率的情况下，采用一个上行波长将所述业务发送给OLT。
  7. 一种业务传输装置，应用于NG-PON2接入的P2P型ONU，包括：检测模块、业务处理模块和业务发送模块；
    所述检测模块，设置为检测ONU接入的业务的速率；
    所述业务处理模块，设置为在所述业务的速率大于NG-PON2中一个上行波长的最大承载速率的情况下，根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的数量，所述数量大于或等于2；
    所述业务发送模块，设置为采用所述数量的上行波长将所述业务发送给OLT。
  8. 如权利要求7所述的业务传输装置，其中，所述业务处理模块，设置为根据所述业务的速率和所述最大承载速率确定承载所述业务所需上行波长的最少数量。
  9. 如权利要求7或8所述的业务传输装置，其中，所述发送模块，设置为：
    选定所述数量的上行波长；
    将所述业务划分为所述数量的子业务；
    对所述子业务进行标识，并通过一个选定的上行波长发送给OLT。
  10. 如权利要求7或8所述的业务传输装置，其中，所述业务发送模块，还设置为在所述业务的速率小于等于NG-PON2中一个上行波长的最大承载速率的情况下，采用一个上行波长将所述业务发送给所述OLT。
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