WO2019010649A1

WO2019010649A1 - Method, device, and system for channel configuration

Info

Publication number: WO2019010649A1
Application number: PCT/CN2017/092631
Authority: WO
Inventors: 高建河
Original assignee: 华为技术有限公司
Priority date: 2017-07-12
Filing date: 2017-07-12
Publication date: 2019-01-17

Abstract

Provided in embodiments of the present invention is a channel configuration method, comprising: an OLT acquires available channel information of an ONU, the available channel information of the ONU at least comprising identifiers of available channels of the ONU; the OLT acquires available channel information of self, the available channel information of self at least comprising identifiers of available channels of the OLT; the channel corresponding to each of the identifiers being used for bearing signals of one wavelength; the OLT acquires, on the basis of the identifier of the channels, overlapping channels between the available channels of self and the available channels of the ONU; the OLT transmits instruction information comprising the overlapping channels to the ONU to instruct the ONU to configure available channels according to the instruction information. Also provided in the embodiments of the present invention are the OLT, the ONU, and an optical network system. The utilization of the solution of the embodiments allows the OLT and the ONU to configure as many as possible available uplink or downlink channels that are supported by either end for communication.

Description

一种通道配置方法、装置及***Channel configuration method, device and system

技术领域Technical field

本发明涉及数据通讯领域，具体地说，涉及一种通道配置方法、装置及***。The present invention relates to the field of data communications, and in particular to a channel configuration method, apparatus and system.

背景技术Background technique

无源光网络(passive optical network，PON)是一种提供“最后一公里”网络接入的***。PON是一种点到多点的网络，图1是现有技术的一种PON的架构示意图。如图1所示，PON的架构包括一个位于中心局的光线路终端(optical line terminal，OLT)、一个光分配网络(optical distribution network，ODN)、以及多个位于用户驻地的光网络单元(optical network unit，ONU)。其中，ODN包括主干光纤、无源分光器(splitter)和分支光纤。Passive optical network (PON) is a system that provides "last mile" network access. The PON is a point-to-multipoint network. FIG. 1 is a schematic diagram of a PON architecture of the prior art. As shown in FIG. 1 , the PON architecture includes an optical line terminal (OLT) at the central office, an optical distribution network (ODN), and multiple optical network units located at the customer premises (optical). Network unit, ONU). The ODN includes a backbone fiber, a split splitter, and a branch fiber.

随着无源光网络(PON)***用户数据量的不断提升，带宽要求越来越高。通常PON***带宽提升有两种方法，一种是提升PON***每个波长的线路速率，另外一种方法是提升PON***中可工作的波长数量，即在PON***中使用更多的波长通道。例如，电气和电子工程师协会(Institute of Electrical and Electronics Engineers，IEEE)定义了三种容量的PON，分别是25Gb/s以太网无源光网络(Ethernet passive optical network，EPON),50Gb/s EPON和100Gb/s EPON。图2a为25Gb/s EPON的架构示意图，图2b为50Gb/s EPON的架构示意图，图2c为100Gb/s EPON的架构示意图。在25Gb/s EPON中，每个25G的ONU配置一对下行波长λd1和上行波长λu1，简称一对上下行波长λ1。在50Gb/s EPON中，每个50G的ONU配置两对上下行波长λ1，λ2。在100Gb/s EPON中，每个100G的ONU配置四对上下行波长λ1，λ2，λ3，λ4。理论上，每个波长速率可达到25Gb/s，采用4个波长总容量就可以达到100Gb/s。As the amount of user data in passive optical network (PON) systems continues to increase, bandwidth requirements are increasing. Generally, there are two methods for improving the bandwidth of a PON system. One is to increase the line rate of each wavelength of the PON system, and the other is to increase the number of operable wavelengths in the PON system, that is, to use more wavelength channels in the PON system. For example, the Institute of Electrical and Electronics Engineers (IEEE) defines three types of PONs, 25Gb/s Ethernet passive optical network (EPON), 50Gb/s EPON and 100Gb/s EPON. 2a is a schematic diagram of a 25Gb/s EPON architecture, FIG. 2b is a 50Gb/s EPON architecture diagram, and FIG. 2c is a 100Gb/s EPON architecture diagram. In the 25Gb/s EPON, each 25G ONU is configured with a pair of downlink wavelength λd1 and an uplink wavelength λu1, which are simply referred to as a pair of uplink and downlink wavelengths λ1. In 50 Gb/s EPON, each 50G ONU is configured with two pairs of uplink and downlink wavelengths λ1, λ2. In 100 Gb/s EPON, each 100G ONU is configured with four pairs of uplink and downlink wavelengths λ1, λ2, λ3, λ4. In theory, each wavelength rate can reach 25Gb / s, with a total capacity of 4 wavelengths can reach 100Gb / s.

OLT侧的接口(如CAUI-4接口)中一对上下行波长信号比如λ1，λ2，λ3或λ4，承载在一路通道(lane)上，四对上下行波长信号就分别承载到四路通道上；所述接口称为多通道(multi-lane)接口，用于实现MAC层到光模块的数据传输。通过1:4的分支光纤，可实现每支光纤对应一路通道。通过光纤连接到ONU，如果连接一路分支光纤，就可实现25Gb/s的速率，连接两路分支光纤就能实现50Gb/s的速率，连接四路分支光纤就能实现100Gb/s的速率。本文中的所有表述为“通道”，除特殊说明的，都特指lane。A pair of uplink and downlink wavelength signals such as λ1, λ2, λ3 or λ4 in the interface on the OLT side (such as the CAUI-4 interface) are carried on a lane, and four pairs of uplink and downlink wavelength signals are respectively carried on the four channels. The interface is called a multi-lane interface and is used to implement data transmission from the MAC layer to the optical module. With a 1:4 branch fiber, each fiber can be connected to one channel. By connecting the fiber to the ONU, if a branch fiber is connected, the rate of 25Gb/s can be achieved, and the connection of the two branch fibers can achieve a rate of 50Gb/s, and the connection of the four-way branch fiber can achieve a rate of 100Gb/s. All expressions in this document are “channels” and are specifically referred to as lanes unless otherwise stated.

在支持100Gb/s的速率的场景中，从OLT出来的四路通道全部接入到ONU，由于这四路通道采用的是WDM/TDM的方式发送信号，当其中一个通道发生故障不能正常发送或接收信号，在OLT或者ONU段就不能正常解调制接收到的信号。这就是说，即使只有一个通道不能正常工作，整个OLT和ONU之间就不能通信。In the scenario of supporting the rate of 100 Gb/s, all the four channels coming out of the OLT are connected to the ONU. Since the four channels use WDM/TDM to send signals, when one of the channels fails, it cannot be sent normally. Receiving the signal, the received signal cannot be demodulated normally in the OLT or ONU segment. That is to say, even if only one channel does not work properly, the entire OLT and the ONU cannot communicate.

发明内容Summary of the invention

本发明实施例提供一种通道配置方法、装置及***，以提高OLT和ONU之间通道通信速率和容错性。Embodiments of the present invention provide a channel configuration method, apparatus, and system to improve channel communication rate and fault tolerance between an OLT and an ONU.

第一方面，本发明实施例提供一种通道配置方法，包括：In a first aspect, an embodiment of the present invention provides a channel configuration method, including:

OLT获取ONU的可用通道信息，所述ONU的可用通道信息至少包括所述ONU可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号； The OLT obtains the available channel information of the ONU, and the available channel information of the ONU includes at least the identifier of the available channel of the ONU; the channel corresponding to each identifier is used to carry a signal of one wavelength;

所述OLT获取自身的可用通道信息，所述自身的可用通道信息至少包括所述OLT可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号；The OLT obtains its own available channel information, and the available channel information of the OLT includes at least the identifier of the available channel of the OLT; the channel corresponding to each of the identifiers is used to carry a signal of one wavelength;

所述OLT根据通道的标识，获取所述自身的可用通道与所述ONU的可用通道重叠的通道；Obtaining, by the OLT, a channel that overlaps with an available channel of the ONU according to an identifier of the channel;

所述OLT将包含所述重叠的通道的指示信息发送给所述ONU，指示所述ONU按照所述指示信息配置可用通道。The OLT sends indication information including the overlapping channels to the ONU, and instructs the ONU to configure an available channel according to the indication information.

在第一方面的第一种可能的实现方式中，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段获取。In a first possible implementation manner of the first aspect, the available channel information of the ONU is configured to maintain a PLOAM message, an operation management and maintenance OAM message, or an optical network terminal management control interface (OMCI) through a multipoint control protocol (MPCP message), a physical layer operation management, and a PLOAM message. The extended field of the message is obtained.

结合第一方面或第一方面的第一种可能实现的方式，在第二种可能实现的方式中，所述指示信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。With reference to the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner, the indication information is maintained and maintained by the multi-point control protocol MPCP message, the physical layer operation management, and the operation management maintenance The OAM message or the extension field of the optical network terminal management control interface OMCI message is sent.

结合第一方面、第一方面的第一种可能实现的方式或第一方面的第二种可能实现的方式，在第三种可能实现的方式中，所述可用通道包括上行可用通道和/或下行可用通道。In combination with the first aspect, the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in a third possible implementation manner, the available channel includes an uplink available channel and/or Downstream available channel.

第二方面，本发明实施例提供一种通道配置方法，包括：In a second aspect, an embodiment of the present invention provides a channel configuration method, including:

ONU发送携带有自身的可用通道信息的消息给OLT；所述自身的可用通道信息至少包括自身可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号；The ONU sends a message carrying its own available channel information to the OLT; the available channel information of the ONU includes at least the identifier of the available channel; and the channel corresponding to each of the identifiers is used to carry a signal of one wavelength;

所述ONU接收来自所述OLT的指示信息，所述指示信息包含需要配置的可用通道信息；其中，所述需要配置的可用通道信息是所述ONU的可用通道与所述OLT的可用通道重叠的通道；The ONU receives the indication information from the OLT, where the indication information includes available channel information that needs to be configured; wherein the available channel information that needs to be configured is that an available channel of the ONU overlaps with an available channel of the OLT. aisle;

所述ONU根据所述指示信息配置可用通道。The ONU configures an available channel according to the indication information.

在第二方面的第一种可能的实现方式中，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。In a first possible implementation manner of the second aspect, the available channel information of the ONU is configured to maintain a PLOAM message, an operation management and maintenance OAM message, or an optical network terminal management control interface OMCI through a multipoint control protocol (MPCP message), a physical layer operation management, and a PLOAM message. The extension field of the message is sent.

结合第二方面或第二方面的第一种可能实现的方式，在第二种可能实现的方式中，所述指示信息携带在多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段中。With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the indication information is carried in a multi-point control protocol MPCP message, a physical layer operation management, maintenance PLOAM message, and operation management. Maintain the OAM message or the extended field of the optical network terminal management control interface OMCI message.

结合第二方面、第二方面的第一种可能实现的方式或第二方面的第二种可能实现的方式，在第三种可能实现的方式中，所述可用通道包括上行可用通道和/或下行可用通道。With reference to the second aspect, the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner, the available channel includes an uplink available channel and/or Downstream available channel.

第三方面，本发明实施例提供一种光线路终端OLT，包括：多个光发射器、多个光接收器、复用器、光耦合器、解复用器和控制器；In a third aspect, an embodiment of the present invention provides an optical line terminal OLT, including: multiple optical transmitters, multiple optical receivers, multiplexers, optical couplers, demultiplexers, and controllers;

所述多个光发射器用于产生多个下行波长信号，所述多个下行波长信号经过复用器之后合并为一路光信号，经过光耦合器后发送出去；The plurality of optical transmitters are configured to generate a plurality of downlink wavelength signals, and the plurality of downlink wavelength signals are combined into one optical signal after passing through the multiplexer, and are sent out through the optical coupler;

所述解复用器用于对接收到的信号解复用分成多个上行波长信号后发送给所述多个光接收器，所述解复用器接收到的信号来自所述光耦合器；The demultiplexer is configured to demultiplex the received signal into a plurality of uplink wavelength signals and then send the signals to the plurality of optical receivers, where the signals received by the demultiplexer are from the optical coupler;

所述控制器和所述多个光发射器、所述多个光接收器、所述复用器、所述光耦合器、所述解复用器直接或间接相连；The controller and the plurality of optical transmitters, the plurality of optical receivers, the multiplexer, the optical coupler, and the demultiplexer are directly or indirectly connected;

所述控制器用于通过所述多个光接收器中的一个或多个获取ONU的可用通道信息和所述OLT自身的可用通道信息；所述ONU的可用通道信息至少包括所述ONU可用通道的标识；所述OLT自身的可用通道信息至少包括所述OLT可用通道的标识；The controller is configured to obtain, by using one or more of the multiple optical receivers, available channel information of the ONU and available channel information of the OLT itself; the available channel information of the ONU includes at least an available channel of the ONU Standard The available channel information of the OLT itself includes at least the identifier of the available channel of the OLT;

所述控制器根据通道的标识，获取所述OLT的可用通道与所述ONU的可用通道重叠的通道；The controller acquires, according to the identifier of the channel, a channel that overlaps an available channel of the OLT with an available channel of the ONU;

控制器将包含所述重叠的通道的指示信息通过所述多个光发射器中的一个或多个发送给所述ONU，指示所述ONU按照所述指示信息配置可用通道。The controller transmits indication information including the overlapping channels to the ONU through one or more of the plurality of optical transmitters, instructing the ONU to configure an available channel according to the indication information.

在第三方面的第一种可能的实现方式中，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段获取。In a first possible implementation manner of the third aspect, the available channel information of the ONU passes the multi-point control protocol MPCP message, the physical layer operation management, maintains the PLOAM message, the operation management and maintenance OAM message, or the optical network terminal management control interface OMCI. The extended field of the message is obtained.

结合第三方面或第三方面的第一种可能实现的方式，在第二种可能实现的方式中，所述指示信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。With reference to the third aspect, or the first possible implementation manner of the third aspect, in the second possible implementation manner, the indication information is maintained and maintained by the multi-point control protocol MPCP message, physical layer operation management, and PLOAM message, operation management and maintenance. The OAM message or the extension field of the optical network terminal management control interface OMCI message is sent.

结合第三方面、第三方面的第一种可能实现的方式或第三方面的第二种可能实现的方式，在第三种可能实现的方式中，所述可用通道包括上行可用通道和/或下行可用通道。In combination with the third aspect, the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner, the available channel includes an uplink available channel and/or Downstream available channel.

第四方面，本发明实施例提供一种光网络单元ONU，包括多个光接收器、多个光发射器、波分复用器、光复用器和控制器；In a fourth aspect, an embodiment of the present invention provides an optical network unit ONU, including multiple optical receivers, multiple optical transmitters, wavelength division multiplexers, optical multiplexers, and controllers;

所述多个光发射器用于接收来自OLT的下行波长信号，所述多个光发射器用于向OLT发送上行波长信号；The plurality of optical transmitters are configured to receive downlink wavelength signals from an OLT, and the multiple optical transmitters are configured to send an uplink wavelength signal to an OLT;

所述波分复用器用于对每一对上行波长信号和上行波长信号进行波分复用或解复用；The wavelength division multiplexer is configured to perform wavelength division multiplexing or demultiplexing on each pair of uplink wavelength signals and uplink wavelength signals;

控制器和光接收器、光发射器、波分复用器、光复用器直接或间接相连，用于控制所述相连的设备进行信号处理；The controller is directly or indirectly connected to the optical receiver, the optical transmitter, the wavelength division multiplexer, and the optical multiplexer, and is configured to control the connected device for signal processing;

所述多个光发射器中的一个或多个发送携带有所述ONU自身的可用通道信息的消息；所述多个光接收器中的一个或多个接收来自OLT的指示信息，所述指示信息包含需要配置的可用通道信息；One or more of the plurality of optical transmitters transmit a message carrying available channel information of the ONU itself; one or more of the plurality of optical receivers receive indication information from the OLT, the indication The information contains the available channel information that needs to be configured;

所述控制器还用于根据所述指示信息配置可用通道。The controller is further configured to configure an available channel according to the indication information.

在第四方面的第一种可能的实现方式中，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。In a first possible implementation manner of the fourth aspect, the available channel information of the ONU passes the multi-point control protocol MPCP message, the physical layer operation management, maintains the PLOAM message, the operation management and maintenance OAM message, or the optical network terminal management control interface OMCI. The extension field of the message is sent.

结合第四方面或第四方面的第一种可能实现的方式，在第二种可能实现的方式中，所述指示信息携带在多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段中。With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the indication information is carried in a multi-point control protocol MPCP message, a physical layer operation management maintenance PLOAM message, and operation management. Maintain the OAM message or the extended field of the optical network terminal management control interface OMCI message.

结合第四方面、第四方面的第一种可能实现的方式或第四方面的第二种可能实现的方式，在第三种可能实现的方式中，所述可用通道包括上行可用通道和/或下行可用通道。With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the available channel includes an uplink available channel and/or Downstream available channel.

第五方面，本发明实施例提供一种光网络***，包括如上所述的光线路终端OLT和至少一个如上所述的光网络单元ONU，所述OLT和所述ONU通过光纤相连。In a fifth aspect, an embodiment of the present invention provides an optical network system, including the optical line terminal OLT as described above and at least one optical network unit ONU as described above, where the OLT and the ONU are connected by an optical fiber.

利用该实施例的方案，OLT和ONU就能配置尽可能多的两端都能支持的上行或下行可用通道数目进行通信。即使发生某个或某些通道发生异常或无法修复的中断故障，也可以重新协商可通信的可用通道，从而确保***仍然能够连通工作，提高***的容错性和健壮性。 With the solution of this embodiment, the OLT and the ONU can configure as many uplink or downlink available channels as possible supported by both ends for communication. Even if an interruption or failure that cannot be repaired by one or some of the channels occurs, the available channels that can communicate can be renegotiated to ensure that the system can still work and improve the system's fault tolerance and robustness.

附图说明DRAWINGS

图1是现有技术的一种PON的架构示意图；1 is a schematic structural diagram of a PON of the prior art;

图2a是25G EPON的架构示意图；2a is a schematic diagram of the architecture of a 25G EPON;

图2b是50G EPON的架构示意图；2b is a schematic diagram of the architecture of a 50G EPON;

图2c是100G EPON的架构示意图；2c is a schematic diagram of the architecture of a 100G EPON;

图3是本发明实施例提供的一种PON***300的架构示意图；FIG. 3 is a schematic structural diagram of a PON system 300 according to an embodiment of the present invention;

图4是本发明实施例提供的一种OLT 400的结构示意图；4 is a schematic structural diagram of an OLT 400 according to an embodiment of the present invention;

图5是本发明实施例提供的一种波长分布的示意图；FIG. 5 is a schematic diagram of a wavelength distribution according to an embodiment of the present invention; FIG.

图6是本发明实施例提供的一种ONU 600的结构示意图；FIG. 6 is a schematic structural diagram of an ONU 600 according to an embodiment of the present invention;

图7是本发明实施例提供的一种通道配置方法的流程示意图；FIG. 7 is a schematic flowchart diagram of a channel configuration method according to an embodiment of the present invention;

图8是本发明实施例提供的一种网络设备800的结构示意图。FIG. 8 is a schematic structural diagram of a network device 800 according to an embodiment of the present invention.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行描述。The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

为了提升PON***的带宽，支持多个波长(或波长通道/波长信道)的PON***已经被提出，例如，背景技术中提到的50G EPON和100G EPON等，或更大速率的EPON***和吉比特无源光网络系(Gigabit Passive Optical Network,GPON)。在PON***中，ONU可以被配置多对上下行波长(两对及以上)。也可以被配置一对上下行波长。波长的数目不同，ONU的速率可以不同。例如，具有一对上下行波长的ONU可以包括上下行速率均为10G或25G的ONU，具有多对上下行波长的ONU可以包括上下行速率均为100G或50G的ONU等。以上所述的几种ONU，上下行的速率可以是相同的，上下行的波长数目也可以是相同的，称为对称ONU。In order to increase the bandwidth of the PON system, a PON system supporting multiple wavelengths (or wavelength channels/wavelength channels) has been proposed, for example, 50G EPON and 100G EPON mentioned in the background art, or a higher rate EPON system and Kyrgyzstan. Gigabit Passive Optical Network (GPON). In a PON system, an ONU can be configured with multiple pairs of upstream and downstream wavelengths (two pairs and above). It can also be configured with a pair of uplink and downlink wavelengths. The number of wavelengths is different and the rate of the ONU can be different. For example, an ONU having a pair of uplink and downlink wavelengths may include an ONU having an uplink and downlink rate of 10G or 25G, and an ONU having multiple pairs of uplink and downlink wavelengths may include an ONU having an uplink and downlink rate of 100G or 50G. For the above-mentioned ONUs, the uplink and downlink rates may be the same, and the number of uplink and downlink wavelengths may also be the same, which is called a symmetric ONU.

在网络部署的过程中，多上行波长ONU和单上行波长ONU可以部署在同一个PON***中，共用ODN等网络设备，以节省网络升级的成本。本发明实施例可以应用于所有多通道接口***中。例如，10千兆比特EPON(10gigabite EPON，10G EPON)、100千兆比特GPON(100gigabite GPON，100G GPON)，还可以应用于下一代PON(next generation PON，NGPON)***、NGPON2等PON***，还可以用于其他***，比如100G或400G的以太网。In the process of network deployment, multiple uplink wavelength ONUs and single upstream wavelength ONUs can be deployed in the same PON system to share network devices such as ODNs to save network upgrade costs. Embodiments of the invention may be applied to all multi-channel interface systems. For example, 10 Gigabit EPON (10 Gigabit EPON, 10 G EPON), 100 Gigabit GPON (100 Gigabite GPON, 100 G GPON) can also be applied to PON systems such as next generation PON (NGPON) systems and NGPON2. Can be used in other systems, such as 100G or 400G Ethernet.

图3是本发明实施例提供的一种PON***300的架构示意图。如图3所示，PON***300包括至少一个OLT 301、多个ONU 303和ODN 305。OLT 301通过ODN 305以点到多点的形式连接到多个ONU 303。其中，从OLT 301到ONU 303的方向可以为下行方向，从ONU303到OLT 301的方向可以为上行方向。在下行方向上，OLT 301可以向ONU 303发送下行波长信号；在上行方向上，ONU 303可以向OLT 301发送上行波长信号。波长信号可以是具有某种波长的光信号载体，用来承载数据、信息或消息等。多个ONU 303中可以包括至少一个多上行波长ONU，例如50G的ONU。由于ONU和光网络终端ONT没有本质差别，图中的ONU在某些场景下可以直接替换为光网络终端ONT，所以本文中的ONU也可以指代ONT。FIG. 3 is a schematic structural diagram of a PON system 300 according to an embodiment of the present invention. As shown in FIG. 3, the PON system 300 includes at least one OLT 301, a plurality of ONUs 303, and an ODN 305. The OLT 301 is connected to the plurality of ONUs 303 in a point-to-multipoint manner via the ODN 305. The direction from the OLT 301 to the ONU 303 may be a downlink direction, and the direction from the ONU 303 to the OLT 301 may be an uplink direction. In the downlink direction, the OLT 301 can transmit a downlink wavelength signal to the ONU 303; in the uplink direction, the ONU 303 can transmit an uplink wavelength signal to the OLT 301. The wavelength signal can be an optical signal carrier having a certain wavelength for carrying data, information or messages, and the like. The plurality of ONUs 303 may include at least one multi-upstream wavelength ONU, such as an ONU of 50G. Since there is no essential difference between the ONU and the ONT of the optical network terminal, the ONU in the figure can be directly replaced with the ONT of the optical network terminal in some scenarios, so the ONU in this document can also refer to the ONT.

下面分别介绍PON***300中各个网络设备的结构以及工作原理。The structure and working principle of each network device in the PON system 300 are respectively described below.

OLTOLT

OLT 301通常位于中心位置，例如，中心局(central office，CO)或者接入点(access node，AN)。OLT 301可以充当ONU 303和上层网络(图中未示出)之间的传输媒介，将从上层网络接收到的信号作为下行信号转发到ONU 303，或者将从ONU 303接收到的上行信号转发到上层网络。The OLT 301 is usually located at a central location, for example, a central office (CO) or an access point (access) Node, AN). The OLT 301 can serve as a transmission medium between the ONU 303 and an upper layer network (not shown), and forwards the signal received from the upper layer network to the ONU 303 as a downlink signal, or forwards the uplink signal received from the ONU 303 to Upper network.

图4是本发明实施例提供的一种OLT 400的结构示意图。图3中的OLT 301可以参考OLT 400的结构。如图4所示，OLT 400可以包括光发射器Tx1-Tx4 401、光接收器Rx1-Rx4403、复用器405、光耦合器407、解复用器409和控制器411。光发射器Tx1-Tx4 401用于产生下行波长信号，例如，图中示出了四个下行波长信号λd1、λd2、λd3、λd4，分别对应4个下行通道。四个下行波长信号经过复用器405之后合并为一路光信号，经过光耦合器407后发送到ODN 305。上行光信号经过所述光耦合器407后发送到解复用器409；解复用器409用于对接收到的信号解复用分成多个上行波长信号后发送给所述多个光接收器403；光接收器Rx0-Rx4 403用于接收上行波长信号，例如，图中示出了四个上行波长信号λu1、λu2、λu3、λu4，分别对应4个上行通道。FIG. 4 is a schematic structural diagram of an OLT 400 according to an embodiment of the present invention. The OLT 301 in FIG. 3 can refer to the structure of the OLT 400. As shown in FIG. 4, the OLT 400 may include optical transmitters Tx1-Tx4 401, optical receivers Rx1-Rx4403, a multiplexer 405, an optical coupler 407, a demultiplexer 409, and a controller 411. The light emitters Tx1-Tx4 401 are used to generate a downlink wavelength signal. For example, four downlink wavelength signals λd1, λd2, λd3, and λd4 are shown, corresponding to four downlink channels. The four downstream wavelength signals are combined into one optical signal after passing through the multiplexer 405, and are sent to the ODN 305 through the optical coupler 407. The uplink optical signal is sent to the demultiplexer 409 through the optical coupler 407; the demultiplexer 409 is configured to demultiplex the received signal into a plurality of uplink wavelength signals and then send the signals to the plurality of optical receivers. 403; The optical receiver Rx0-Rx4 403 is configured to receive an uplink wavelength signal. For example, four uplink wavelength signals λu1, λu2, λu3, and λu4 are shown in the figure, corresponding to four uplink channels.

控制器411和光发射器Tx1-Tx4 401、光接收器Rx1-Rx4 403、复用器405、光耦合器407、解复用器409直接或间接相连，用于控制所述相连的设备进行信号处理，可以是CPU、微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者至少一个集成电路。The controller 411 and the optical transmitters Tx1-Tx4 401, the optical receivers Rx1-Rx4 403, the multiplexer 405, the optical coupler 407, and the demultiplexer 409 are directly or indirectly connected to control the connected devices for signal processing. It may be a CPU, a microprocessor, an Application Specific Integrated Circuit (ASIC), or at least one integrated circuit.

以OLT和一个ONU的交互流程为例，在ONU注册环节或者在ONU注册成功后，OLT中的控制器411通过光接收器Rx1-Rx4 403中的一个或多个获取ONU的可用通道信息，所述ONU的可用通道信息至少包括可用通道的标识；控制器411也获取OLT自身的可用通道信息，所述OLT自身的可用通道信息至少包括OLT可用通道的标识；。Taking the interaction process of the OLT and an ONU as an example, after the ONU registration process or the ONU registration is successful, the controller 411 in the OLT obtains the available channel information of the ONU through one or more of the optical receivers Rx1-Rx4 403. The available channel information of the ONU includes at least the identifier of the available channel; the controller 411 also obtains the available channel information of the OLT itself, and the available channel information of the OLT itself includes at least the identifier of the available channel of the OLT.

控制器411根据通道的标识，获取所述OLT的可用通道与所述ONU的可用通道重叠的通道；所述重叠的可用通道是指OLT侧可用通道集合和ONU侧可用通道集合中相同的部分。The controller 411 obtains the channel that the available channel of the OLT overlaps with the available channel of the ONU according to the identifier of the channel; the overlapping available channel refers to the same part of the available channel set on the OLT side and the available channel set on the ONU side.

控制器411将包含所述重叠的通道的指示信息通过光发射器Tx1-Tx4 401中的一个或多个发送给所述ONU，指示所述ONU按照所述指示信息配置可用通道。所述配置可用通道包括激活(enable)指示的可用通道或者按照指示的可用通道传输信号。The controller 411 transmits indication information including the overlapping channels to the ONU through one or more of the optical transmitters Tx1-Tx4 401, instructing the ONU to configure an available channel according to the indication information. The configured available channel includes an available channel that is enabled to indicate or transmits a signal in accordance with the indicated available channel.

可选的，可以在光接收器Rx1-Rx4前增加前置放大器，例如半导体光放大器(semiconductor optical amplifier，SOA)415。上行的波长信号λu1、λu2、λu3、λu4经过光解复用器409进行分光；然后进入SOA 415进行光功率放大；然后经过窄带滤波器413，滤除有效光信号以外的自发辐射光信号；然后进入光接收器Rx，例如雪崩二极管(avalanche photodiode，APD)。前置放大器提供的灵敏度增益，通常取决于其增益噪声指数。而窄带滤波器可以很好地滤除信号带外的噪声，可以有效地提高放大器所带来的增益。例如，当没有窄带滤波器时，放大器仅能提供1.3dB的增益，而增加一个窄带滤波器以后，放大器可以提供4.3dB的增益，灵敏度可以得到明显的提升。Optionally, a preamplifier, such as a semiconductor optical amplifier (SOA) 415, may be added in front of the optical receivers Rx1-Rx4. The upstream wavelength signals λu1, λu2, λu3, λu4 are split by the optical demultiplexer 409; then enter the SOA 415 for optical power amplification; then pass through the narrowband filter 413 to filter out the spontaneous radiated optical signals other than the effective optical signals; Enter the optical receiver Rx, such as avalanche photodiode (APD). The sensitivity gain provided by the preamplifier is usually determined by its gain noise figure. The narrow-band filter can filter out the noise outside the signal band well, which can effectively increase the gain brought by the amplifier. For example, when there is no narrow-band filter, the amplifier can only provide 1.3dB of gain, and after adding a narrow-band filter, the amplifier can provide 4.3dB of gain, and the sensitivity can be significantly improved.

对于采用前置放大器的OLT，波长信号需要分布在一个比较窄的范围，这样可以便于前置放大器后的窄带滤波器进行滤波。图5是本发明实施例提供的一种波长分布的示意图。如图5所示，针对100G的场景，可以配置四个相同波长宽度的下行波长λd1、λd2、λd2、λd4和四个相同波长宽度的上行波长λu1、λu2、λu3、λu4。For OLTs with preamplifiers, the wavelength signal needs to be distributed over a narrow range, which facilitates filtering of the narrowband filter after the preamplifier. FIG. 5 is a schematic diagram of a wavelength distribution provided by an embodiment of the present invention. As shown in FIG. 5, for the 100G scene, four downlink wavelengths λd1, λd2, λd2, λd4 of the same wavelength width and four uplink wavelengths λu1, λu2, λu3, and λu4 of the same wavelength width may be disposed.

ONUONU

ONU 303可以分布式地设置在用户侧位置，例如用户驻地。ONU 303可以充当OLT 301 和用户设备之间的媒介，例如，ONU 303可以将从OLT 301接收到的下行信号转发给用户设备，或者将从用户设备接收到的信号作为上行信号转发到OLT 301。发送上行信号的上行通道可以称为发送通道，接收下行信号的下行通道也可以称为接收通道。用户设备可以包括个人电脑(personal computer，PC)、便携电子设备等终端设备。应当理解，ONU 303的结构与光网络终端(optical network terminal，ONT)相近，因此，本发明实施例中，ONU和ONT可以互换。The ONU 303 can be distributed in a user-side location, such as a customer premises. ONU 303 can act as OLT 301 The medium between the user equipment and the user equipment, for example, the ONU 303 may forward the downlink signal received from the OLT 301 to the user equipment, or forward the signal received from the user equipment to the OLT 301 as an uplink signal. The uplink channel that sends the uplink signal may be referred to as a transmission channel, and the downlink channel that receives the downlink signal may also be referred to as a reception channel. The user equipment may include terminal devices such as a personal computer (PC), a portable electronic device, and the like. It should be understood that the structure of the ONU 303 is similar to that of an optical network terminal (ONT). Therefore, in the embodiment of the present invention, the ONU and the ONT can be interchanged.

图6是本发明实施例提供的一种ONU 600的结构示意图。该ONU 600支持4路上下行波长的，ONU 600可以为100G的ONU。当然可以支持其他个数的上下行波长，每一个波长对应一条通道。如图6所示，ONU 600可以包括光接收器Rx1-Rx4 601、光发射器Tx1-Tx4603、波分复用器605、光复用器607和控制器609。光发射器Rx1-Rx4 601用于分别接收来自OLT的下行波长信号λd1-λd4，光发射器Tx1-Tx4 603用于向OLT发送上行波长信号λu1-λu4。波分复用器605用于对每一对上行波长信号和上行波长信号进行波分复用或解复用。光复用器607用于将下行波长信号λd1-λd4进行分波，对上行波长信号λu1-λu4进行合波。控制器609和光接收器Rx1-Rx4 601、光发射器Tx1-Tx4 603、波分复用器605、光复用器607直接或间接相连，用于控制所述相连的设备进行信号处理。控制器609可以是CPU、微处理器，ASIC，或者至少一个集成电路。FIG. 6 is a schematic structural diagram of an ONU 600 according to an embodiment of the present invention. The ONU 600 supports 4 channels of downstream wavelengths, and the ONU 600 can be 100G ONUs. Of course, other numbers of uplink and downlink wavelengths can be supported, and each wavelength corresponds to one channel. As shown in FIG. 6, the ONU 600 may include an optical receiver Rx1-Rx4 601, an optical transmitter Tx1-Tx4603, a wavelength division multiplexer 605, an optical multiplexer 607, and a controller 609. The optical transmitters Rx1-Rx4 601 are for receiving downlink wavelength signals λd1-λd4 from the OLT, respectively, and the optical transmitters Tx1-Tx4 603 are for transmitting the upstream wavelength signals λu1-λu4 to the OLT. The wavelength division multiplexer 605 is configured to wavelength division multiplex or demultiplex each pair of uplink wavelength signals and uplink wavelength signals. The optical multiplexer 607 is configured to demultiplex the downlink wavelength signals λd1 - λd4 and combine the upstream wavelength signals λu1 - λu4. The controller 609 and the optical receivers Rx1-Rx4 601, the optical transmitters Tx1-Tx4 603, the wavelength division multiplexer 605, and the optical multiplexer 607 are directly or indirectly connected to control the connected devices for signal processing. Controller 609 can be a CPU, a microprocessor, an ASIC, or at least one integrated circuit.

不同的ONU可以配置相同的波长。当不同的ONU使用相同的波长时，不同的ONU可以通过时分复用的方式使用该波长上的不同时隙。同一个ONU也可以配置多个不同的波长，或者不同的ONU配置不同的波长。同一个ONU或不同的ONU可以通过波分复用的方式使用不同的波长。例如，100G的ONU可以通过波分复用的方式使用四个不同的下行波长λd1-λd4或四个不同的上行波长λu1-λu4。Different ONUs can be configured with the same wavelength. When different ONUs use the same wavelength, different ONUs can use different time slots on the wavelength in a time division multiplexed manner. The same ONU can also be configured with multiple different wavelengths, or different ONUs can be configured with different wavelengths. The same ONU or different ONUs can use different wavelengths by wavelength division multiplexing. For example, a 100G ONU can use four different downstream wavelengths λd1-λd4 or four different upstream wavelengths λu1-λu4 by wavelength division multiplexing.

在ONU注册环节，光发射器Tx1-Tx4 603中的一个或多个发送注册消息(如多点控制协议MPCP消息或物理层运行管理维护PLOAM消息)。所述注册消息携带ONU的可用通道信息，所述ONU的可用通道信息至少包括可用通道的标识；或者ONU采用默认通道注册之后，光发射器Tx1-Tx4 603发送携带有ONU的可用通道信息的消息(如操作管理维护OAM消息或光网络终端管理控制接口OMCI消息)；所述可用通道包括上行可用通道和/或下行可用通道。In the ONU registration process, one or more of the optical transmitters Tx1-Tx4 603 send a registration message (such as a Multipoint Control Protocol MPCP message or a physical layer operation management maintenance PLOAM message). The registration message carries the available channel information of the ONU, and the available channel information of the ONU includes at least the identifier of the available channel; or after the ONU registers with the default channel, the optical transmitter Tx1-Tx4 603 sends a message carrying the available channel information of the ONU. (such as operation management maintenance OAM message or optical network terminal management control interface OMCI message); the available channels include uplink available channels and/or downlink available channels.

光接收器Rx1-Rx4 601中的一个或多个接收来自OLT的指示信息，所述指示信息包含需要配置的可用通道信息，指示所述ONU按照所述指示信息配置可用通道。其中，所述需要配置的可用通道信息是所述ONU的可用通道与所述OLT的可用通道重叠的通道。One or more of the optical receivers Rx1-Rx4 601 receive indication information from the OLT, the indication information including available channel information to be configured, instructing the ONU to configure an available channel according to the indication information. The available channel information that needs to be configured is a channel in which an available channel of the ONU overlaps with an available channel of the OLT.

所述控制器609还用于根据所述指示信息配置可用通道。The controller 609 is further configured to configure an available channel according to the indication information.

所述配置可用通道包括激活(enable)指示的可用通道或者按照指示的可用通道传输信号。The configured available channel includes an available channel that is enabled to indicate or transmits a signal in accordance with the indicated available channel.

需要额外说明的是，上述OLT和ONU的上行波长和下行波长虽然都是以4个为例进行了说明，但实际上并不限于4个波长，其他个数的波长也同样适用于本发明所有实施例。It should be noted that although the uplink wavelength and the downlink wavelength of the OLT and the ONU are both described as four examples, they are not limited to four wavelengths, and other wavelengths are equally applicable to all of the present invention. Example.

本发明实施例提供了一种通道配置方法，如图7所示，包括An embodiment of the present invention provides a channel configuration method, as shown in FIG.

步骤701，OLT获取ONU的可用通道信息，所述ONU的可用通道信息至少包括所述ONU可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号。Step 701: The OLT acquires the available channel information of the ONU, where the available channel information of the ONU includes at least the identifier of the available channel of the ONU; and the channel corresponding to each identifier is used to carry a signal of one wavelength.

所述可用通道包括上行可用通道和/或下行可用通道。每条通道都能承载一个波长的信号，比如上行通道能承载λu1、λu2、λu3或λu4的信号，下行通道能承载λd1、λd2、λd3或λd4的信号。所述ONU的可用通道信息一般是由ONU发送给OLT的。The available channels include uplink available channels and/or downstream available channels. Each channel can carry one wavelength The signal, for example, the up channel can carry the signal of λu1, λu2, λu3 or λu4, and the down channel can carry the signal of λd1, λd2, λd3 or λd4. The available channel information of the ONU is generally sent by the ONU to the OLT.

作为一个可选实施例，ONU的可用通道信息可以通过注册环节的消息发送给OLT，如通过MPCP消息或PLOAM消息的扩展字段发送；也可以在ONU采用默认通道注册之后再通过消息发送给OLT，如通过OAM消息或OMCI消息的扩展字段发送。As an optional embodiment, the available channel information of the ONU may be sent to the OLT through a message of the registration link, such as by using an extended field of the MPCP message or the PLOAM message, or may be sent to the OLT by using the message after the ONU registers with the default channel. It is sent as an extension field of an OAM message or an OMCI message.

作为另一个可选实施例，所述ONU的可用通道信息包含每个通道的标识及其状态信息；还可以进一步包括可用通道的个数。As another optional embodiment, the available channel information of the ONU includes the identifier of each channel and its status information; and may further include the number of available channels.

步骤703，所述OLT获取自身的可用通道信息，所述自身的可用通道信息至少包括所述OLT可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号。In step 703, the OLT obtains its own available channel information, and the available channel information of the OLT includes at least the identifier of the available channel of the OLT; and the channel corresponding to each identifier is used to carry a signal of one wavelength.

需要说明的是，步骤701和步骤703可以先后执行，并且执行顺序可以步骤701在前，也可以步骤703在前；或者两步骤同时进行。OLT的可用通道上的每条通道都能承载相同数目波长的信号，并且能承载的波长数目与ONU的相同，比如上行也都能承载λu1-λu4的信号，下行也都能承载λd1-λd4的信号。It should be noted that step 701 and step 703 may be performed sequentially, and the execution sequence may be step 701 first, or step 703 may be preceded; or two steps may be performed simultaneously. Each channel on the available channel of the OLT can carry the same number of wavelength signals, and can carry the same number of wavelengths as the ONU. For example, the uplink can also carry the signal of λu1-λu4, and the downlink can also carry λd1-λd4. signal.

步骤705，所述OLT根据通道的标识，获取所述自身的可用通道与所述ONU的可用通道重叠的通道；Step 705: The OLT acquires, according to the identifier of the channel, a channel that overlaps the available channel of the OMN with the available channel of the ONU.

所述重叠的通道是指OLT侧可用通道集合和ONU侧可用通道集合中相同的部分，或者说，是OLT侧和ONU侧都可用的通道。两侧具有相同标识的通道承载同一波长的信号。The overlapping channels refer to the same parts in the set of available channels on the OLT side and the available channels on the ONU side, or channels available on both the OLT side and the ONU side. Channels with the same identification on both sides carry signals of the same wavelength.

步骤707，所述OLT将包含所述重叠的通道的指示信息发送给所述ONU，指示所述ONU按照所述指示信息配置可用通道。所述配置可用通道包括激活(enable)指示的可用通道或者按照指示的可用通道传输信号。Step 707: The OLT sends indication information including the overlapping channels to the ONU, and instructs the ONU to configure an available channel according to the indication information. The configured available channel includes an available channel that is enabled to indicate or transmits a signal in accordance with the indicated available channel.

所述发送的指示信息包括被采用重叠通道的通道标识。所述ONU接收到所述指示信息后，根据所述指示信息中的通道标识将对应的通道配置为真实可用。所述OLT也将重叠的通道配置为真实可用。The transmitted indication information includes a channel identifier that is adopted by an overlapping channel. After receiving the indication information, the ONU configures the corresponding channel to be truly available according to the channel identifier in the indication information. The OLT also configures the overlapping channels to be truly available.

利用该实施例的方案，OLT和ONU就能配置尽可能多的两端都能支持的上行或下行可用通道数目进行通信。即使发生某个或某些通道发生异常或无法修复的中断故障，也可以重新协商可通信的可用通道，从而确保***仍然能够连通工作，提高***的容错性和健壮性。上下行通道在时间上可以分开进行配置，也可以通过一个或多个消息同时配置，不影响本方案的实施。With the solution of this embodiment, the OLT and the ONU can configure as many uplink or downlink available channels as possible supported by both ends for communication. Even if an interruption or failure that cannot be repaired by one or some of the channels occurs, the available channels that can communicate can be renegotiated to ensure that the system can still work and improve the system's fault tolerance and robustness. The uplink and downlink channels can be configured separately in time, or can be configured simultaneously through one or more messages, without affecting the implementation of the solution.

利用该实施例的方案，OLT和ONU就能根据匹配的相同可用通道信息对各自通道进行配置，两端配置后的通道就能正常接收和发送数据。比如ONU上报3条上行通道(0、1和3)可用，以及3条下行通道(0、1和2)可用，其他通道故障或者其他问题不可用。OLT接收到ONU的上报信息后，如果检查到自身上行通道也有3条上行通道可用(0、1和2)可用，有2条下行通道(0和2)是可用。OLT就能获得两端共同可同的通道，即2条上行通道(0和1)和2条下行通道(0和2)是可用，发送给ONU。OLT配置其上的2条上行通道(0和1)和2条下行通道(0和2)，ONU配置其上的2条上行通道(0和1)和2条下行通道(0和2)。这样，上行有2条通道配置成功，下行有2条通道配置成功。在100G EPON的4通道的场景中，上行就能达到50G的速率，下行也能达到50G的速率。With the solution of this embodiment, the OLT and the ONU can configure the respective channels according to the matched available channel information, and the channels configured at both ends can normally receive and transmit data. For example, the ONU reports that three uplink channels (0, 1, and 3) are available, and three downlink channels (0, 1, and 2) are available. Other channel failures or other problems are not available. After the OLT receives the report information of the ONU, if it detects that its own uplink channel has 3 uplink channels available (0, 1, and 2), 2 downlink channels (0 and 2) are available. The OLT can obtain the same channel at both ends, that is, two uplink channels (0 and 1) and two downlink channels (0 and 2) are available and sent to the ONU. The OLT configures two upstream channels (0 and 1) and two downstream channels (0 and 2), and the ONU configures two upstream channels (0 and 1) and two downstream channels (0 and 2). In this way, two channels on the uplink are successfully configured, and two channels on the downlink are successfully configured. In the 4-channel scenario of 100G EPON, the uplink can reach a rate of 50G, and the downlink can reach a rate of 50G.

作为一个可选实施例，所述匹配的可用通道信息包括通道标识和所述标识对应的通道是否被采用之外，还可以包括上行/下行通道标识、通道绑定模式和通道主备用信息的一个或多个。具体可以如表1和表2所示信息。其中表格中可用成员就是指示对应通道需要被采用，不是成员的将不被采用，即不被用于发送和接收信号。As an optional embodiment, the matched available channel information includes a channel identifier and a channel corresponding to the identifier, and may further include an uplink/downlink channel identifier, a channel binding mode, and a channel primary and backup information. One or more. Specifically, the information shown in Table 1 and Table 2 can be used. The available members in the table indicate that the corresponding channel needs to be adopted, and those who are not members will not be used, that is, they are not used to transmit and receive signals.

表1 ONU下行多通道工作模式信息Table 1 ONU downlink multi-channel working mode information

表2 ONU上行多通道工作模式信息Table 2 ONU uplink multi-channel working mode information

需要说明的是，除了OLT可以主动发送消息调整ONU的通道工作模式外，由于OLT和ONU实时的监控每个通道的工作状态，一旦发现某个或某些通道发生异常或无法修复的中断故障，也可以进一步根据上述表格中设置的规则执行数据流的重定向或通道保护切换。从而确保***仍然能够连通工作，提高***的容错性和健壮性。It should be noted that, except that the OLT can actively send messages to adjust the channel working mode of the ONU, since the OLT and the ONU monitor the working state of each channel in real time, once an abnormality of one or some channels or an unresolvable interruption fault is found, Data stream redirection or channel protection switching can also be performed further according to the rules set in the above table. This ensures that the system can still work and improve the system's fault tolerance and robustness.

下面提供一种扩展多点控制协议(MPCP)消息的实施例，用于OLT获取ONU的可用通道信息，以及将指示信息发送给ONU。但必须明确的是，除了MPCP消息外，还可以扩展PLOAM消息、OAM和OMCI消息等其他消息，扩展方式和该实施例类似。在已有的Ethernet控制帧的基础上MPCP消息中又定义了5个控制帧类型，以实现EPON***的启动注册、时间同步、时隙分配等功能，标准的MPCP消息字段如表3所示An embodiment of an extended multipoint control protocol (MPCP) message is provided for the OLT to acquire available channel information of the ONU and send the indication information to the ONU. However, it must be clarified that in addition to the MPCP message, other messages such as PLOAM messages, OAMs, and OMCI messages can be extended, and the extension manner is similar to this embodiment. Based on the existing Ethernet control frame, five control frame types are defined in the MPCP message to implement the EPON system startup registration, time synchronization, and time slot assignment. The standard MPCP message fields are shown in Table 3.

表3 MPCP消息字段说明Table 3 Description of MPCP message fields

针对多通道的配置，可以复用5个控制帧类型，也可以新增一个控制帧类型，通过扩展MPCP的保留字段(如Data/Pad字段)来进行实现配置多通道所需的信息交互。如表4 所示，在MPCP消息中增加了多通道上行/下行工作模式设置使能字段、上行/下行多通道数目和状态字段、多通道工作模式字段和多通道工作模式中成员字段。这样，在步骤701中，ONU就可以通过MPCP消息中的上行/下行多通道数目和状态字段上报ONU的可用通道信息给OLT；在步骤703中，OLT就可以通过上行/下行工作模式设置使能字段、多通道工作模式字段和多通道工作模式中成员字段将多通道配置信息发送给ONU。For multi-channel configuration, you can reuse 5 control frame types, or you can add a new control frame type. By extending the reserved fields of MPCP (such as Data/Pad field), you can implement the information interaction required to configure multiple channels. As shown in Table 4 As shown, the multi-channel uplink/downlink working mode setting enable field, the uplink/downlink multi-channel number and status field, the multi-channel working mode field, and the multi-channel working mode member field are added to the MPCP message. In this way, in step 701, the ONU can report the available channel information of the ONU to the OLT through the uplink/downlink multi-channel number and status field in the MPCP message; in step 703, the OLT can enable the uplink/downstream working mode setting. The field, multi-channel working mode field, and multi-channel working mode member field send multi-channel configuration information to the ONU.

表4 MPCP承载的多通道消息Table 4 Multi-channel messages carried by MPCP

图8为本发明实施例提供的一种网络设备800的结构示意图。如图8所示，网络设备800包括：包括处理器801、存储器802和收发器803。可选的，收发器803中还可以包括媒体访问控制(medium access control，MAC)804。网络设备800还可以包括波分复用器WDM 805和通信接口806。上述实施例中的任意一个OLT或ONU都可以具有类似网络设备800的结构。FIG. 8 is a schematic structural diagram of a network device 800 according to an embodiment of the present invention. As shown in FIG. 8, the network device 800 includes a processor 801, a memory 802, and a transceiver 803. Optionally, the transceiver 803 may further include a medium access control (MAC) 804. Network device 800 may also include a wavelength division multiplexer WDM 805 and a communication interface 806. Any one of the above embodiments may have a structure similar to that of the network device 800.

处理器801可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路ASIC，或者至少一个集成电路，用于执行相关程序，以实现本发明实施例所提供的技术方案。The processor 801 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit ASIC, or at least one integrated circuit, for executing related programs, to implement the technology provided by the embodiments of the present invention. Program.

存储器802可以是只读存储器(Read Only Memory，ROM)，静态存储设备，动态存储设备或者随机存取存储器(Random Access Memory，RAM)。存储器802可以存储操作***和其他应用程序。在通过软件或者固件来实现本发明实施例提供的技术方案时，用于实现本发明实施例提供的技术方案的程序代码保存在存储器802中，并由处理器801来执行。The memory 802 can be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). Memory 802 can store operating systems and other applications. When the technical solution provided by the embodiment of the present invention is implemented by software or firmware, the program code for implementing the technical solution provided by the embodiment of the present invention is stored in the memory 802 and executed by the processor 801.

收发器803可以包括光发射器和/或光接收器。光发射器可以用于发送信号，光接收器可以用于接收信号。光发射器可以通过发光器件，例如气体激光器、固体激光器、液体激光器、半导体激光器等实现。光接收器可以通过光检测器，例如光电检波器或者光电二极管等实现。 Transceiver 803 can include a light emitter and/or a light receiver. An optical transmitter can be used to transmit signals and an optical receiver can be used to receive signals. The light emitter can be realized by a light emitting device such as a gas laser, a solid laser, a liquid laser, a semiconductor laser or the like. The light receiver can be implemented by a photodetector such as a photodetector or a photodiode.

收发器803可以耦合到WDM 805，当向通信接口806发送信号时，WDM 805充当复用器，当从通信接口806接收信号时，WDM 805充当解复用器。WDM 805也可以称为光耦合器。通信接口806可以耦合到ODN。 Transceiver 803 can be coupled to WDM 805, which acts as a multiplexer when transmitting signals to communication interface 806, and WDM 805 acts as a demultiplexer when receiving signals from communication interface 806. WDM 805 can also be called an optocoupler. Communication interface 806 can be coupled to the ODN.

当网络设备800为OLT时，网络设备800的收发器803，获取ONU的可用通道信息，所述ONU的可用通道信息至少包括可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号。网络设备800的处理器801获取所述自身的可用通道与所述ONU的可用通道重叠的通道。网络设备800的收发器803，并将得到的OLT和ONU的重叠通道的指示信息发送给所述ONU，指示所述ONU按照所述指示信息配置可用通道。同时网络设备800的收发器803自身也配置所述重叠通道为真实可用。When the network device 800 is an OLT, the transceiver 803 of the network device 800 acquires the available channel information of the ONU, and the available channel information of the ONU includes at least the identifier of the available channel; the channel corresponding to each of the identifiers is used to carry one wavelength. signal of. The processor 801 of the network device 800 obtains a channel in which the available channel of the own overlaps with the available channel of the ONU. The transceiver 803 of the network device 800 sends the obtained indication information of the overlapping channel of the OLT and the ONU to the ONU, and instructs the ONU to configure an available channel according to the indication information. At the same time, the transceiver 803 of the network device 800 itself also configures the overlapping channels to be truly available.

可选的，上述功能可以在处理器801的控制下执行，例如，处理器801执行保存于存储器802的代码，实现上述的功能。Optionally, the above functions may be performed under the control of the processor 801. For example, the processor 801 executes code stored in the memory 802 to implement the functions described above.

当网络设备800为ONU时，网络设备800的收发器803，发送注册消息(如MPCP消息或PLOAM消息)。所述注册消息携带ONU的可用通道信息，所述ONU的可用通道信息至少包括可用通道的标识；或者ONU采用默认通道注册之后，发送携带有ONU的可用通道信息的消息(如OAM消息或OMCI消息)；所述可用通道包括上行可用通道和/或下行可用通道。接收来自OLT的指示信息，所述指示信息包含需要配置的可用通道信息，指示所述ONU按照所述指示信息配置可用通道。所述配置可用通道包括激活(enable)指示的可用通道或者按照指示的可用通道传输信号。并根据所述指示信息配置可用通道。When the network device 800 is an ONU, the transceiver 803 of the network device 800 transmits a registration message (such as an MPCP message or a PLOAM message). The registration message carries the available channel information of the ONU, and the available channel information of the ONU includes at least the identifier of the available channel; or after the ONU registers with the default channel, the available channel information carrying the ONU is sent. Messages (such as OAM messages or OMCI messages); the available channels include upstream available channels and/or downstream available channels. Receiving indication information from the OLT, where the indication information includes available channel information that needs to be configured, and instructs the ONU to configure an available channel according to the indication information. The configured available channel includes an available channel that is enabled to indicate or transmits a signal in accordance with the indicated available channel. And configuring an available channel according to the indication information.

具体地，通过图8所示的网络设备800可以实现图7所示的方法步骤。应注意，尽管图8所示的网络设备800仅仅示出了处理器801、存储器802、收发器803、MAC 804、WDM 805以及通信接口806，但是在具体实现过程中，本领域的技术人员应当明白，网络设备800还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，网络设备800还可包含实现其他附加功能的硬件器件。此外，本领域的技术人员应当明白，计算机设备800也可仅仅包含实现本发明实施例所必须的器件，而不必包含图8中所示的全部器件。Specifically, the method steps shown in FIG. 7 can be implemented by the network device 800 shown in FIG. It should be noted that although the network device 800 shown in FIG. 8 only shows the processor 801, the memory 802, the transceiver 803, the MAC 804, the WDM 805, and the communication interface 806, in a specific implementation process, those skilled in the art should It is understood that network device 800 also includes other devices necessary to achieve proper operation. At the same time, those skilled in the art will appreciate that network device 800 may also include hardware devices that implement other additional functions, depending on the particular needs. Moreover, those skilled in the art will appreciate that computer device 800 may also only include the components necessary to implement embodiments of the present invention, and does not necessarily include all of the devices shown in FIG.

利用该实施例的方案，OLT和ONU就能配置尽可能多的两端都能支持的上行或下行可用通道数目进行通信。即使发生某个或某些通道发生异常或无法修复的中断故障，也可以重新协商可通信的可用通道，从而确保***仍然能够连通工作，提高***的容错性和健壮性。With the solution of this embodiment, the OLT and the ONU can configure as many uplink or downlink available channels as possible supported by both ends for communication. Even if an interruption or failure that cannot be repaired by one or some of the channels occurs, the available channels that can communicate can be renegotiated to ensure that the system can still work and improve the system's fault tolerance and robustness.

上述实施例中，均是对OLT或者ONU中的多通道协商配置，但所述方法不限于OLT或ONU的场景中，只要是支持多通道的两端设备需要协商配置多通道，就可以运用本实施例方案。这样，OLT就对应于网络侧设备，ONU就对应于用户侧设备。In the foregoing embodiment, the multi-channel negotiation configuration is performed on the OLT or the ONU. However, the method is not limited to the scenario of the OLT or the ONU. Example scheme. Thus, the OLT corresponds to the network side device, and the ONU corresponds to the user side device.

在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质的集成服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如，固态硬盘Solid State Disk(SSD))等。In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as an integrated server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)) or the like.

计算机中的处理器读取存储在计算机可读介质中的计算机可读程序代码，使得处理器能够执行在流程图中每个步骤、或各步骤的组合中规定的功能动作；生成实施在框图的每一块、或各块的组合中规定的功能动作的装置。The processor in the computer reads the computer readable program code stored in the computer readable medium such that the processor is capable of performing the various functional steps specified in each step of the flowchart, or a combination of steps; A device that functions as specified in each block, or combination of blocks.

计算机可读程序代码可以完全在用户的计算机上执行、部分在用户的计算机上执行、作为单独的软件包、部分在用户的计算机上并且部分在远程计算机上，或者完全在远程计算机或者服务器上执行。也应该注意，在某些替代实施方案中，在流程图中各步骤、或框图中各块所注明的功能可能不按图中注明的顺序发生。例如，依赖于所涉及的功能，接连示出的两个步骤、或两个块实际上可能被大致同时执行，或者这些块有时候可能被以相反顺序执行。The computer readable program code can execute entirely on the user's computer, partly on the user's computer, as a separate software package, partly on the user's computer and partly on the remote computer, or entirely on the remote computer or server. . It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. For example, depending on the functions involved, consecutive The two steps shown, or two blocks, may actually be performed substantially concurrently, or the blocks may sometimes be performed in the reverse order.

本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。 Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

Claims

一种通道配置方法，其特征在于，包括：A channel configuration method, comprising:

光线路终端OLT获取光网络单元ONU的可用通道信息，所述ONU的可用通道信息至少包括所述ONU可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号；The optical line terminal OLT acquires the available channel information of the ONU of the optical network unit, and the available channel information of the ONU includes at least the identifier of the available channel of the ONU; the channel corresponding to each of the identifiers is used to carry a signal of one wavelength;

所述OLT获取自身的可用通道信息，所述自身的可用通道信息至少包括所述OLT可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号；The OLT obtains its own available channel information, and the available channel information of the OLT includes at least the identifier of the available channel of the OLT; the channel corresponding to each of the identifiers is used to carry a signal of one wavelength;

所述OLT根据通道的标识，获取所述自身的可用通道与所述ONU的可用通道重叠的通道；Obtaining, by the OLT, a channel that overlaps with an available channel of the ONU according to an identifier of the channel;

所述OLT将包含所述重叠的通道的指示信息发送给所述ONU，指示所述ONU按照所述指示信息配置可用通道。The OLT sends indication information including the overlapping channels to the ONU, and instructs the ONU to configure an available channel according to the indication information.
如权利要求1所述的方法，其特征在于，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段获取。The method according to claim 1, wherein the available channel information of the ONU passes through a multipoint control protocol MPCP message, a physical layer operation management maintenance PLOAM message, an operation management maintenance OAM message, or an optical network terminal management control interface OMCI message. The extension field is obtained.
如权利要求1或2所述的方法，其特征在于，所述指示信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。The method according to claim 1 or 2, wherein the indication information is passed through a multipoint control protocol MPCP message, a physical layer operation management maintenance PLOAM message, an operation management maintenance OAM message, or an optical network terminal management control interface OMCI message. The extension field is sent.
如权利要求1至3任一所述的方法，其特征在于，还包括所述OLT按照所述重叠的通道配置自身可用通道。The method of any one of claims 1 to 3, further comprising the OLT configuring its own available channels in accordance with the overlapping channels.
如权利要求1至4任一所述的方法，其特征在于，所述可用通道包括上行可用通道和/或下行可用通道。The method of any of claims 1 to 4, wherein the available channels comprise uplink available channels and/or downstream available channels.
一种通道配置方法，其特征在于，包括：A channel configuration method, comprising:

光网络单元ONU发送携带有自身的可用通道信息的消息给光线路终端OLT；所述自身的可用通道信息至少包括自身可用通道的标识；每个所述标识对应的通道用于承载一个波长的信号；The optical network unit ONU sends a message carrying its own available channel information to the optical line terminal OLT; the available channel information of the self includes at least the identifier of the available channel; and the channel corresponding to each of the identifiers is used to carry a signal of one wavelength. ;

所述ONU接收来自所述OLT的指示信息，所述指示信息包含需要配置的可用通道信息；其中，所述需要配置的可用通道信息是所述ONU的可用通道与所述OLT的可用通道重叠的通道；The ONU receives the indication information from the OLT, where the indication information includes available channel information that needs to be configured; wherein the available channel information that needs to be configured is that an available channel of the ONU overlaps with an available channel of the OLT. aisle;

所述ONU根据所述指示信息配置可用通道。The ONU configures an available channel according to the indication information.
如权利要求6所述的方法，其特征在于，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。The method according to claim 6, wherein the available channel information of the ONU passes the multipoint control protocol MPCP message, the physical layer operation management and maintenance PLOAM message, the operation management and maintenance OAM message or the optical network terminal management control interface OMCI message. The extension field is sent.
如权利要求6或7所述的方法，其特征在于，所述指示信息携带在多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段中。The method according to claim 6 or 7, wherein the indication information is carried in a multipoint control protocol MPCP message, a physical layer operation management maintenance PLOAM message, an operation management maintenance OAM message or an optical network terminal management control interface OMCI message. In the extension field.
如权利要求6至8任一所述的方法，其特征在于，所述配置可用通道包括激活指示的可用通道或者按照指示的可用通道传输信号。The method of any of claims 6 to 8, wherein the configuring the available channels comprises activating the indicated available channels or transmitting signals in accordance with the indicated available channels.
如权利要求6至9任一所述的方法，其特征在于，所述可用通道包括上行可用通道和/或下行可用通道。The method of any of claims 6 to 9, wherein the available channels comprise uplink available channels and/or downlink available channels.
一种光线路终端OLT，其特征在于，包括：多个光发射器401、多个光接收器403、复用器405、光耦合器407、解复用器409和控制器411；An optical line terminal OLT, comprising: a plurality of optical transmitters 401, a plurality of optical receivers 403, Multiplexer 405, optical coupler 407, demultiplexer 409 and controller 411;

所述多个光发射器401用于产生多个下行波长信号，所述多个下行波长信号经过复用器405之后合并为一路光信号，经过光耦合器407后发送出去；The plurality of optical transmitters 401 are configured to generate a plurality of downlink wavelength signals, and the plurality of downlink wavelength signals are combined into one optical signal after being multiplexer 405, and then transmitted through the optical coupler 407;

所述解复用器409用于对接收到的信号解复用分成多个上行波长信号后发送给所述多个光接收器403，所述解复用器409接收到的信号来自所述光耦合器407；The demultiplexer 409 is configured to demultiplex the received signal into a plurality of uplink wavelength signals and then send the signals to the plurality of optical receivers 403, where the signals received by the demultiplexer 409 are from the light. Coupler 407;

所述控制器411和所述多个光发射器401、所述多个光接收器403、所述复用器405、所述光耦合器407、所述解复用器409直接或间接相连；The controller 411 and the plurality of optical transmitters 401, the plurality of optical receivers 403, the multiplexer 405, the optical coupler 407, and the demultiplexer 409 are directly or indirectly connected;

所述控制器411用于通过所述多个光接收器403中的一个或多个获取光网络单元ONU的可用通道信息和所述OLT自身的可用通道信息；所述ONU的可用通道信息至少包括所述ONU可用通道的标识；所述OLT自身的可用通道信息至少包括所述OLT可用通道的标识；The controller 411 is configured to acquire available channel information of the optical network unit ONU and available channel information of the OLT by using one or more of the multiple optical receivers 403; the available channel information of the ONU includes at least The identifier of the available channel of the ONU; the available channel information of the OLT itself includes at least the identifier of the available channel of the OLT;

所述控制器411根据通道的标识，获取所述OLT的可用通道与所述ONU的可用通道重叠的通道；The controller 411 acquires, according to the identifier of the channel, a channel that the available channel of the OLT overlaps with the available channel of the ONU;

控制器411将包含所述重叠的通道的指示信息通过所述多个光发射器401中的一个或多个发送给所述ONU，指示所述ONU按照所述指示信息配置可用通道。The controller 411 transmits indication information including the overlapping channels to the ONU through one or more of the plurality of optical transmitters 401, instructing the ONU to configure an available channel according to the indication information.
如权利要求11所述的OLT，其特征在于，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段获取。The OLT according to claim 11, wherein the available channel information of the ONU passes the multipoint control protocol MPCP message, the physical layer operation management maintenance PLOAM message, the operation management maintenance OAM message or the optical network terminal management control interface OMCI message. The extension field is obtained.
如权利要求11或12所述的OLT，其特征在于，所述指示信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。The OLT according to claim 11 or 12, wherein the indication information is passed through a multipoint control protocol MPCP message, a physical layer operation management maintenance PLOAM message, an operation management maintenance OAM message, or an optical network terminal management control interface OMCI message. The extension field is sent.
如权利要求11至13任一所述的OLT，其特征在于，所述可用通道包括上行可用通道和/或下行可用通道。The OLT of any of claims 11 to 13, wherein the available channels comprise uplink available channels and/or downlink available channels.
一种光网络单元ONU，其特征在于，包括多个光接收器601、多个光发射器603、波分复用器605、光复用器607和控制器609；An optical network unit ONU, comprising: a plurality of optical receivers 601, a plurality of optical transmitters 603, a wavelength division multiplexer 605, an optical multiplexer 607 and a controller 609;

所述多个光发射器601用于接收来自光线路终端OLT的下行波长信号，所述多个光发射器603用于向OLT发送上行波长信号；The plurality of optical transmitters 601 are configured to receive downlink wavelength signals from the optical line terminal OLT, and the multiple optical transmitters 603 are configured to send uplink wavelength signals to the OLT;

所述波分复用器605用于对每一对上行波长信号和上行波长信号进行波分复用或解复用；The wavelength division multiplexer 605 is configured to perform wavelength division multiplexing or demultiplexing on each pair of uplink wavelength signals and uplink wavelength signals;

所述控制器609和所述多个光接收器601、所述多个光发射器603、所述波分复用器605、所述光复用器607直接或间接相连，用于控制所述相连的设备进行信号处理；The controller 609 and the plurality of optical receivers 601, the plurality of optical transmitters 603, the wavelength division multiplexer 605, and the optical multiplexer 607 are directly or indirectly connected to control the connection. Equipment for signal processing;

所述多个光发射器603中的一个或多个发送携带有所述ONU自身的可用通道信息的消息；所述多个光接收器601中的一个或多个接收来自OLT的指示信息，所述指示信息包含需要配置的可用通道信息；One or more of the plurality of optical transmitters 603 transmitting a message carrying available channel information of the ONU itself; one or more of the plurality of optical receivers 601 receiving indication information from the OLT, The indication information includes available channel information that needs to be configured;

所述控制器609还用于根据所述指示信息配置可用通道。The controller 609 is further configured to configure an available channel according to the indication information.
如权利要求15所述的ONU，其特征在于，所述ONU的可用通道信息通过多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段发送。The ONU according to claim 15, wherein the available channel information of the ONU passes the multipoint control protocol MPCP message, the physical layer operation management and maintenance PLOAM message, the operation management and maintenance OAM message or the optical network terminal management control interface OMCI message. The extension field is sent.
如权利要求15或16所述的ONU，其特征在于，所述指示信息携带在多点控制协议MPCP消息、物理层运行管理维护PLOAM消息、操作管理维护OAM消息或光网络终端管理控制接口OMCI消息的扩展字段中。The ONU according to claim 15 or 16, wherein the indication information is carried in a Multipoint Control Protocol (MPCP) message, a physical layer operation management and maintenance PLOAM message, an operation management and maintenance OAM message, or an optical network terminal pipe. The control field is in the extension field of the OMCI message.
如权利要求15至17任一所述的ONU，其特征在于，所述配置可用通道包括激活指示的可用通道或者按照指示的可用通道传输信号。The ONU of any of claims 15 to 17, wherein the configured available channel comprises an available channel that activates the indication or transmits a signal according to the indicated available channel.
如权利要求15至18任一所述的ONU，其特征在于，所述可用通道包括上行可用通道和/或下行可用通道。The ONU of any of claims 15 to 18, wherein the available channels comprise uplink available channels and/or downlink available channels.
一种光网络***，包括一个如权利要求11至14任一所述的光线路终端OLT，和至少一个如权利要求15至19任一所述的光网络单元ONU，所述OLT和所述ONU通过光纤相连。 An optical network system comprising an optical line terminal OLT according to any one of claims 11 to 14, and at least one optical network unit ONU according to any one of claims 15 to 19, said OLT and said ONU Connected by fiber optics.