CN100512287C - Passive optical network system based on generalized multiprotocol label switching (GMPLS) protocol - Google Patents

Passive optical network system based on generalized multiprotocol label switching (GMPLS) protocol Download PDF

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CN100512287C
CN100512287C CN 200510027931 CN200510027931A CN100512287C CN 100512287 C CN100512287 C CN 100512287C CN 200510027931 CN200510027931 CN 200510027931 CN 200510027931 A CN200510027931 A CN 200510027931A CN 100512287 C CN100512287 C CN 100512287C
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optical
optical network
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network
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CN1725756A (en
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颖 任
辉 俞
惠嫣娇
戈 范
勇 郭
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上海交通大学
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Abstract

一种光通信领域的基于通用多协议标签交换协议的无源光网络系统,包括:包括:光线路终端OLT、多个光网络单元ONU、宽带无源光分配网,光线路终端OLT和多个光网络单元ONU之间通过宽带无源光分配网相连,光线路终端OLT和光网络单元ONU作为服务提供商核心网通用多协议标签交换协议GMPLS域的边缘路由器,与核心网内另外的GMPLS路由器通过通信链路连接,光线路终端OLT单独作为系统内集成服务中间路由器,所有的通信活动由光线路终端OLT控制,光网络单元单独作为系统内集成服务入口路由器,光网络单元ONU具体执行光线路终端OLT的命令。 One kind of optical communication art PON system common Multiprotocol Label Switching protocols, including those based on: comprising: an optical line terminal OLT, the ONU plurality of optical network units, a broadband passive optical distribution network, and a plurality of optical line terminal OLT between the optical network units ONU through the passive optical distribution network connected to a broadband optical line terminal OLT and the optical network unit ONU as a service provider core network routers with additional GMPLS multiprotocol label switching protocol GMPLS domain edge router, and the core network by communication links, optical line termination OLT alone as intermediate routers within the service integration system, all communication activity is controlled by the optical line terminal OLT, optical network unit in the system as a single integrated services ingress router performs specific optical network unit ONU optical line terminal OLT commands. 本发明统一了核心网和接入网的网络管理,提高网管理效率和增强网络管理的水平,提高了封装效率,提高了服务质量,简化了媒质接入控制。 The present invention unifies the core network and the access network network management, improve the efficiency and enhance the network management level network management, improve packaging efficiency, improve service quality, simplify the Medium Access Control.

Description

基于通用多协议标签交换协议的无源光网络系统 General passive optical network system multiprotocol label switching protocol based on

技术领域 FIELD

本发明涉及一种光通信技术领域的系统,特别是一种基于通用多协议标签交换协议的无源光网络系统。 TECHNICAL FIELD The present invention relates to an optical communication, in particular based on multi-protocol label switching protocol common passive optical network system. 背景技术 Background technique

无源光网络是一种利用光纤实现宽带接入的新技术,可以提供超宽带接入满足未来用户多媒体及实时业务传输的要求。 A passive optical network using an optical fiber to achieve a new broadband access technology, ultra-wideband can provide the user access to meet future requirements of multimedia and real-time service transmission. 目前无源光网络系统主要有异步传输模式无源光网络系统APON(ITU-T建议G.9S3)、基于千兆以太网的无源光网络系统EPON (IEEE标准802. 3ah)和千兆比无源光网络系统GPON (ITU-T建议G. 984)。 Currently passive optical network system mainly ATM passive optical network system APON (ITU-T recommendation G.9S3), Gigabit Ethernet based passive optical network system EPON (IEEE Standard 802. 3ah) and Gigabit passive optical network GPON (ITU-T recommendation G. 984). 这三种技术都是现在接入网技术的研究重点,且都已有了国际标准。 These three technologies are now the focus of access network technology research, and have had international standards.

经对现有技术的文献检索发现,基于千兆以太网的无源光网络系统EPON(腿标准文件IEEE std 802. 3ah™-2004, IEEE standard for information technology—.Te.1 ecoramuncations and information exchange between systems — local andmetropolitan area networks- specific requirements, part3, amendment, 美国电子电气工程师协会,802. 3ah信息技术标准一系统间通信和信息交换一局域网和城域网一特殊要求,第三部分,补充,2004年颁布),在无源光网络中传输以太网封装的分组数据,并利用多点控制协议MPCP提供基于时分复用的媒质接入控制能力,同时实现了基于区分服务DiffServ的服务质量保证模型。 The prior art literature search found Gigabit Ethernet passive optical network system the EPON (leg standard document IEEE std 802. 3ah ™ -2004, IEEE standard for information technology-.Te.1 ecoramuncations and information exchange between Based systems -. local andmetropolitan area networks- specific requirements, part3, amendment, American Association of electrical and Electronics engineers, between 802 3ah a standard IT communication and information exchange between systems - local and metropolitan area a a special request, the third part, supplement, 2004 promulgated), packet data transmission in a passive optical network encapsulation of Ethernet, using MPCP provides multipoint control protocol based on time division multiplexing of medium access control, while achieving the quality of service model is based on DiffServ Differentiated services. 但在该技术存在一些固有的缺陷和不足,如典型的基于千兆以太网的无源光网络EPON没有考虑接入网与服务提供商本地核心网的融合,特别是与未来基于通用标签交换的核心网的融合问题,以及以太分组封装效率低、基于区分服务DiffServ服务模型对单个业务流服务质量较差、不支持快速标签交换,缺乏与核心网统一的控制管理技术、缺乏统一的网络资源规划等缺陷。 However, there are some inherent flaws and shortcomings of the technology, such as the typical Gigabit Ethernet-based passive optical network EPON access network does not consider local integration and service provider core network, in particular based on common label switching and future core network integration issues, as well as low-Ethernet packet encapsulation efficiency, DiffServ Differentiated services service model based on the quality of the individual service traffic flow is poor, does not support fast label switching, lack of a unified core network control and management technology, the lack of a unified network resource planning and other defects.

通用多协议标签交换GMPLS (IETF RFC 3945)是近年来研究较多的关于未来自动光交换网AS0N(ITU-T建议G.8080)的统一管理和运行平台协议,能够提供全网的统一管理和控制。 Generalized Multi-Protocol Label Switching GMPLS (IETF RFC 3945) is a unified platform for the management and operation agreement on the future of automatic light switching network AS0N (ITU-T recommendation G.8080) in recent years more research, to provide unified management of the whole network and control. 通用多协议标签交换流量工程技术的运用有利于网络高效、可靠运转的同时使网络的资源和传输性能达到最优化。 The use of Generalized Multi-Protocol Label Switching traffic engineering technology in favor of network-efficient, while the reliable operation of the transmission performance of the network resources and optimize. 通用多协议标签交换使用了对等的网络模型,开放了光域的内部结构,路由器可以对光层进行控制。 Generalized Multi-Protocol Label Switching network using the peer model, open the internal structure of the optical domain, the router can be controlled optical layer. 这样使控制平面扁平化,跨越了核心光网和周边的设备,提供了统一的智能控制和管理平面。 Such flattening of the control plane, across the core optical network and the peripheral devices, provides a unified intelligent control and management plane. 发明内容 SUMMARY

本发明针对背景技术中各无源光网络存在的不足和缺陷,提供一种基于通用多协议标签交换协议的无源光网络系统,使其把光接入网和服务提供商本地核心网无缝的融合起来,形成统一智能控制和管理平台,提髙传输效率,优化资源分配,解决现有接入网的服务质量问题。 BACKGROUND The present invention is directed to a passive optical network in each of the shortcomings and deficiencies, there is provided a passive optical network system based on a common multi-protocol label switching protocol, so that the local optical access network and the service provider core network seamlessly They are fused together to form a unified platform for intelligent control and management, to mention Gao transmission efficiency, optimize resource allocation to address the existing access network quality of service issues.

本发明是通过以下技术方案实现的,本发明包括: 一个光线路终端OLT和多个光网络单元ONU、宽带无源光分配网。 The present invention is achieved by the following technical solutions, the present invention comprises: a plurality of optical line terminal OLT and the ONU optical network unit, the broadband passive optical distribution network. 在一个光线路终端OLT和多个光网络单元ONU之间通过宽带无源光分配网相连,光线路终端OLT和光网络单元ONU作为服务提供商核心网通用多协议标签交换协议GMPLS域的边缘路由器,与核心网内另外的GMPLS路由器通过通信链路连接,光线路终端OLT单独作为系统内集成服务中间路由器,其处于主导地位,所有的通信活动由光线路终端OLT控制,光网络单元单独作为系统内集成服务入口路由器,其属于从属地位,光网络单元ONU具体执行光线路终端OLT的命令。 Between an OLT and a plurality of optical network units ONU through the passive optical distribution network connected to a broadband optical line terminal OLT and the optical network unit ONU as the core network, service provider edge router using Multiprotocol Label Switching GMPLS protocol field, Also connected to the GMPLS routers within the core network through a communication link, an optical line termination, OLT alone as intermediate routers within the service integration system, which is dominant in all of the communication activity is controlled by the optical line terminal OLT, optical network unit in the system as a separate integrated services ingress router, which belongs to the subordinate position, an OLT of the optical network unit ONU specific command executed. 接入网系统作为服务提供商本地核心网的边缘设备,完成所有边缘功能,物理层技术采用无源光网络一般成熟技术。 Access network system as a service provider edge devices of the home core network, all edges complete functional, physical layer technology uses passive optical network is generally mature technology.

所述的光线路终端OLT由控制平面和数据平面组成,其控制平面包括:第一通用信令处理模块、接入允许控制模块、第一管理模块、路由模块,数据平面有通用标签转发模块,在整个系统中光线路终端OLT处于主导地位,来自用户或者光网络单元0NU的服务或者控制请求首先进入控制平面的第一通用信令处理模块进行分析处理,涉及到系统控制和其他服务的控制直接由扩展的信令模块处理,涉及到服务接纳控制的消息和参数交由接入允许控制模块决定是否接纳该请求,接入允许模块根据接入网本身资源状况和核心网的资源状况进行相应的接入允许控制算法计算,如果接入网有足够资源而核心网没有相应的资源,还必须通过第一通用信令处理模块和路由模块向核心网发出服务请求,如果服务接纳则最终返回确认至用户并告知相关的各项用于配置光网络单元O The optical line terminal OLT by the composition of the control plane and data plane, a control plane which comprises: a first common signaling processing module, allowing access control module, a first management module, routing module, universal tag data plane forwarding module, throughout the system an OLT in a dominant position, from a user or a service or control optical network unit first enters a request 0NU first universal control plane signaling processing module analyzes and processes related to the control system and other services directly signaling processed by the extension module, related to the service admission control messages and parameters referred admission control module determines whether to accept the request, the access module with the resources to allow the access network and the core network resource status own respective admission control algorithm calculation, if the access network and the core network has sufficient resources do not have the resources, must also issue a service request to the core network through a first common signaling processing module and the routing module if receiving the service returns an acknowledgment to the final and inform the user of the associated optical network unit arranged for O NU中数据平面各模块的参数和分发给此连接的标签值,服务连接建立后光线路终端0LT的数据平面只需要简单的通用标签转发模块 NU data plane parameters in each module and the label value distributed connection, service connection establishment data plane after the optical line terminal 0LT simply generalized label forwarding module

7对由光网络单元ONU中继的用户发送的数据进行通用标签的认定和转发,这种通用标签的转发将在下文详细叙述。 Seven pairs of user data transmitted by a relay optical network unit ONU will be recognized universal tag and forwarding, universal tag that will be described in detail below. 光线路终端OLT的第一管理模块通过内部管理接口和协议与控制平面和数据平面内的各个功能性模块连接,负责对各模块进行管理,包括策略控制、参数配置、状态信息收集和报告、告警、计费等。 The OLT management module via a first interface and protocol with the internal management and control plane functionality of the various modules within data plane connections, each module is responsible for the management, including the control strategy, parameter configuration, information gathering and reporting status, alarm , billing and so on.

所述的光网络单元ONU由控制平面和数据平面组成,其控制平面包括:第二通用信令处理模块、第二管理模块,数据平面包括:分组分类模块、标签映射模块、流量策略调整模块和队列公平调度模块,在整个系统中光网络单元ONU属于从属地位,所有的控制决策都必须向光线路终端OLT进行请求,用户所提出的服务请求由光网络单元ONU负责转发,当光线路终端OLT决定接纳用户请求后,通过光线路终端OLT的第二通用信令处理模块向光网络单元ONU发出信令表明连接接纳并告知相关的各项参数和分发的标签值,光网络单元ONU数据平面的各模块必须根据接纳确认的各项参数进行配置,其中分组分类模块对用户分组进行分类并将属于同一个应用数据流的分组置入单独的队列缓存中,然后标签映射模块负责对每个分组进行标签的映射工作,此后分组经由流量策略调整 The optical network unit ONU by the control and data planes, whose control plane comprises: a second common signaling processing module, the second management module, the data plane comprising: a packet classification module, the tag mapping module, and a traffic policy adjustment module queue fair scheduling module, the entire system optical network unit ONU belongs to the subordinate position, all control decisions must request to an OLT, the user's service requests made forwarded by the optical network unit ONU is responsible, when the optical line terminal OLT receiving a user request after the decision, the second common signaling an OLT issued to a processing module that is signaled optical network unit ONU is connected to receive and inform the tag value associated parameters and distribution, the optical network unit ONU data plane each module must be configured according to the parameters of the receiving acknowledgment, wherein the packet classification module classifies packets and user packets into separate queues belonging to the same application buffer data stream, and label mapping module is responsible for each packet mapping work label, then the packet flow through strategy adjustment 块进行流量的调整使之符合所协商的流量参数,最后各应用数据流的分组在队列公平调度模块的调度之下向光线路终端OLT发送分组数据。 Mass flow rate is adjusted to conform to the negotiated traffic parameters, the last packet of each data stream application sending packet data to an OLT under fair scheduling module scheduling queue. 光网络单元ONU的第二管理模块通过内部管理接口和协议与控制平面和数据平面内的各个功能性模块连接,负责对各模块进行管理。 A second optical network unit ONU management module via the interface, and the internal management and control plane protocol and the various functional modules within data plane connections, each module is responsible for management.

光线路终端OLT的第一管理模块通过信令或网络管理协议(如SNMP)与光网络单元ONU的第二管理模块建立连接,向光网络单元ONU下达内部管理命令,对光网络单元内部的各模块进行管理、参数配置和状态信息的收集报告等。 A first optical line terminal OLT by the management module establishes a signaling or network management protocol (e.g., SNMP) management module and a second optical network unit ONU is connected to the internal management command issued to the optical network unit ONU, each of the optical network unit inside management module, parameter configuration and status reporting collected information, and the like. 光线路终端OLT的第一管理模块还同核心网的统一管理平台的连接依靠外部管理接口和协议(如SNMP)等,负责将系统内部的状态信息报告给统一的网络管理平台,进行相关的管理参数的传递、协商和配置,以及故障告警和计费等。 A first optical line terminal OLT, the management module also rely on external management interfaces and protocols (such as SNMP), etc. are connected with the core network unified management platform is responsible for the internal state of the system information is reported to a unified network management platform, the management related passing parameters, negotiation and configuration, and fault alarm and billing. 光网络单元ONU的第二管理模块的管理内容、指令和相关参数均通过信令或网络管理协议(如SNMP)从光线路终端OLT内部的第一管理模块获得,并负责向光线路终端OLT内部的第一管理模块进行运行状态信息的报告、故障告警以及运行参数的协商等。 Content management module managing a second optical network unit ONU, instructions and related parameters are obtained from the interior of a first optical line termination OLT through signaling management module or a network management protocol (e.g., the SNMP), and the inside is responsible to an OLT the first report of the management module operating status information, consultation and other operating parameters and fault alarm.

光线路终端OLT的通用标签转发模块和光网络单元ONU的标签映射模块,采用通用标签交换技术实现无源光网络数据向核心网的快速标签转发,在无源光网络中使用分组头标签、时隙甚至波长(现阶段不采用)作为标签,形成体系标签转发,分组头标签用于识别粒度最小的单位,用于区分每个应用数据流,建立基于流的标签 Universal tag of an OLT forwarding module and the optical network unit ONU label mapping module, using a common label switching technology to a passive optical network fast data forwarding tag core network, using packet header tag in a passive optical network, the time slot even wavelength (this stage is not used) as a label, the label forming system forwarding the packet header tag identifying a minimum unit particle size, for distinguishing each of the application data stream, based on the establishment of label stream

交换路径,属于同一个光网络单元o而的所有基于流的标签交换路径在光网络单元ONU处进行汇聚,嵌套入基于时隙标签的标签交换路径,此处时隙标签用于标识光网络单元ONU上行发送的绝对时间(开始时间和结束时间或发送长度),上行数据由光网络单元ONU向光线路终端OLT传输,光线路终端OLT根据时隙标签识别所有属于一个光网络单元ONU的数据流,而使用分组头标签识别光网络单元ONU内部的应用流,用户数据在到达光线路终端OLT后,无需进行分组头査看等高层功能,只需根据已定的标签转发策略进行快速转发即可,提髙了传输效率和传输速度,下行数据仍然按照广播式发送,与现行PON技术类似,目前基于通用多协议标签交换协议的无源光网络系统主要使用时分复用方式,但可以平滑过渡到未来基于波分复用的方式,即使用波长为标签的标签转发路径。 Switched path, part of the same optical network unit to all optical network identification label switched path based on the flow aggregation at the optical network unit ONU, nested into slots based label switched path label, where the label for the slot and the o absolute time (the start time and end time or length of transmission) unit ONU for uplink transmission, uplink data to identify all the data belonging to a optical network unit ONU in accordance with the label by the optical time slot to an ONU transmitting an OLT, an OLT flow, and using the identified optical network unit ONU the internal packet stream header label application, user data after reaching the OLT optical line terminal, without performing high-level functions and other packet header view, forwarding policy simply fast-forwarding has been set according to the label i.e. can, Gao put the transmission efficiency and transmission rate, downlink data is still sent in broadcast, and technology similar to the existing PON, the current PON system based on a common protocol is multiprotocol label switching using time division multiplexing the main mode, but a smooth transition future wavelength division multiplexing manner, i.e., a wavelength of the tag label forwarding path.

本发明采用GMPLS协议作为PON的核心控制协议,同未来使用GMPLS作为智能控制协议的自动光交换网ASON形成统一的通用控制和管理平台,自动光交换网ASON通过在光传送网中引入GMPLS控制协议实现网络资源的按时按需分配,从而实现光网络的智能化,提高网络传输和控制效率,降低管理成本,在PON中引入GMPLS作为核心的控制和管理协议,同样可以实现对PON内部资源的智能化控制和管理,更重要的是通过GMPLS作为纽带,实现了从接入网到以自动光交换网ASON为基础的城域核心网的统一智能控制和管理平台,实现了接入网和核心网的无缝连接,包括统一资源配置、统一的传输控制、统一策略管理、统一网络规划以及统一的网络优化管理,从而提髙服务质量、提高网络运行效率,降低管理和运行成本。 The present invention uses GMPLS protocol as the PON core control protocol, automatic light switching network ASON formed with the future use of GMPLS as an intelligent control protocol common unified control and management platform, an automatic light switching network ASON by introducing GMPLS control protocol in the optical transport network network resources of time and according to need, thereby realizing the intelligent optical network, and improving the network transmission efficiency and control, reduce management costs, incorporated as a core GMPLS control and management protocol in a PON, may also be intelligent internal resources of the PON control and management, more importantly, through the GMPLS as a link, and from the access network to an automated optical switching network ASON-based intelligent control and unified management platform for metro core, implement the access and core network seamless connectivity, including unified resource allocation, unified transport control, unified policy management, unified network planning, network optimization and unified management, thereby improving Gao quality of service, improve network efficiency, reduce administrative and operating costs.

本发明光线路终端0LT和光网络单元0NU采用GMPLS协议和集成服务IntServ模型的控制平面、数据业务面分离的运行模式,未来网络的发展方向是控制平面和数据业务平面分离(逻辑分离或物理分离),在GMPLS P0N的现阶段采用逻辑分离模式,即控制信息和数据在同一个物理信道(时隙)中传输,控制平面的作用是使得用户的服务请求和网络的控制完全自动化,避免了人工操作的复杂性和效率底下,控制平面和数据平面分离使得,用户在服务建立之前通过控制平面的信令请求服务,服务提供商可以通过统一的资源规划和分配尽最大可能满足用户的需求,同时保证现有业务的服务质量,并保证网络运行状态的平稳,所有GMPLS P0N的通信控制消息和控制功能都通过控制平面的信令模块完成,连接建立后,控制平面对数据平面的模块进行参数的配置,数据业务平面主要完成 The optical line terminal 0LT and an optical network unit of the invention 0NU adoption control plane GMPLS protocol and Integrated Services IntServ model, data service-split mode of operation, the future direction of the network control plane and data plane separation (logical separation or physical separation) in this stage using GMPLS P0N logical split mode, i.e. the control information and data on the same physical channel (time slot) is transmitted, the control plane is enough to cause a user to control the network service request and fully automated, avoiding manual under the complexity and efficiency, control plane and data plane separation such that the service requested by the user through the control plane signaling before the service is established, the service provider can do its best to meet the needs of users through a unified planning and resource allocation, while ensuring existing business service quality, and to ensure the smooth operation of the network status, communication GMPLS P0N all control messages and control functions are performed by the control plane signaling module, the connection is established, the control plane data plane configuration parameters of the modules , to complete the main plane data traffic 数据的分类、处理和转发等操作, 提髙了网络的运行效率,管理面所完成的功能是通过内部管理接口对控制平面和数据平面进行宏观的管理。 Classification of data, and forwarding processing operations, Gao mentioned operation efficiency, the network management plane performs the function macro management of the control plane and data plane via internal management interfaces.

本发明光线路终端OLT和光网络单元ONU的第一、第二通用信令处理模块,采用资源预留协议RSVP及其扩展作为GMPLS PON的控制信令,不同于以往PON技术使用专用的控制信令机制只用于PON内部信令控制,GMPLS PON使用通用的资源预留信令协议RSVP作为信令协议可以完成包括端到端业务请求和PON通信控制在内的所有相关信令控制功能,资源预留协议RSVP本身不仅作为资源预留协议,而且还用于用户服务请求、通用标签的请求和分配,PON通信控制等,在GMPLS PON中用户使用资源预留协议RSVP发起服务请求,光网络单元ONU负责将请求向光线路终端OLT进行转发,光线路终端OLT接收到请求后经过管理及接入允许控制决定是否接纳该请求,如果接纳则预留相应的资源,并分配其通用转发标签,建立通用标签交换路径,此外,由于PON中有一些特殊的控制功能,如自动发现、注册和 The present invention is an optical line termination OLT and the optical network unit ONU first and second common signaling processing module, and uses Resource Reservation Protocol RSVP as an extension of the GMPLS control signaling PON, unlike the conventional PON technology using dedicated control signaling internal signaling mechanism is used only for controlling PON, the GMPLS PON using a universal resource reservation signaling protocol RSVP as the signaling protocol may include a complete all-end service request signaling and the communication control including the PON control function, resource reservation left RSVP protocol itself not only as a resource reservation protocol, but also for a user requesting a service request, and the universal tag assigned, the communication control PON, using a resource reservation protocol RSVP GMPLS user initiates a service request in the PON, an optical network unit ONU after admission control and management to decide whether to accept the request after the request is responsible for forwarding to an OLT, an optical line termination, OLT receives the request, if the reservation receiving the corresponding resource, and allocates its versatility forwarding label, Generalized LSP, in addition, since the PON has some special control functions such as automatic discovery, registration, and 测距等,而且资源预留协议RSVP作为一种透明传输协议具有易扩展性,因此可以将PON 的控制功能也同样由资源预留协议RSVP携带以完成PON控制功能。 Distance, etc., but as a resource reservation protocol RSVP transparent transmission protocol having easy extension, and therefore the PON can also control functions carried by resource reservation protocol RSVP PON to perform control functions.

本发明整个GMPLS PON系统的一个光线路终端OLT、多个光网络单元ONU、宽带无源光分配网可以被认为是服务提供商核心网的边缘设备,在GMPLS PON中所有光网络单元ONU属于从属地位,所有的通信活动都受到光线路终端OLT的控制,因此可以将核心网的边缘路由器功能集成到PON设备中,其中光线路终端OLT起着中心控制功能,而光网络单元ONU则具体执行光线路终端OLT的命令,边缘路由器的功能包括,信令控制、接入允许控制、分组头査看分析、分组分类、队列公平调度以及标签交换路径建立、限制路由选择等,光线路终端OLT负责处理所有复杂的控制平面功能,包括信令控制、接入允许控制以及路由和管理功能,而光网络单元ONU 具体负责处理所有复杂的数据平面功能,包括分组头查看分析、分组分类、队列公平调度以及标签交换路径建立等,这样分散了设备的实 A whole an OLT GMPLS PON system according to the present invention, a plurality of optical network units ONU, broadband passive optical distribution network can be considered a service provider core network edge devices, in the GMPLS PON ONU belonging to all optical network units subordinate position, all communication activities are controlled by an OLT, so that the edge router of the core network functionality may be integrated into the PON apparatus, wherein the optical line termination OLT plays a central control function, and the specific optical network unit ONU performs light an OLT command functions include edge routers, signaling control, admission control, packet header analysis view, packet classification, scheduling, and fair queue label switched path is established, routing and other restrictions, the optical line termination OLT is responsible for processing All complex control plane functions, including signaling control, admission control and routing and management functions, and the optical network unit ONU specifically responsible for handling all the complex functions of the data plane, a packet comprising a header analysis view, packet classification, queuing, and scheduling fairness LSP establishing and the like, such a solid dispersion device 现复杂度,降低服务提供商的设备成本,并简化控制和管理复杂度,提高整体网络性能。 Now the complexity, lower equipment costs for service providers, and simplify control and management complexity and improve overall network performance.

本发明整个系统采用集成服务模型(IntServ)改善对单个业务流的服务质量, 对于资源相对有限的接入网中,需要对每个业务流进行有效的资源控制,包括缓存和带宽的分配,才能保证单个业务流能够得到充分的服务而相互之间没有影响,通过引入集成服务模型,每个业务流都可以向光线路终端OLT请求建立连接,经过接入允许控制模块接纳后建立连接,连接建立后GMPLS PON则为每个流都建立独立的标签交换路径,通过第一通用信令处理模块信令协议进行标签的分发,每个业务分组在进入光网络单元ONU后经过分组分类模块选择出特定的业务流的分组,并为其分配单独的缓存队列,经由标签映射模块进行标签的映射和添加,然后通过基于漏桶机制的流量策略调整模块保证每个业务流的流量平稳并符合协商的参数,最后分组进入队列公平调度模块在每个业务流 The present invention employs the system Integrated Services Model (the IntServ) to improve the quality of service of a single service flow, relatively limited resources for the access network, the need for effective resource control for each traffic stream, bandwidth allocation, and includes a buffer to single traffic stream to ensure a sufficient service can be obtained without affecting each other, through the introduction of an integrated service model, each traffic flow may request to establish an OLT connected, via a connection admission control module after receiving the connection establishment after the GMPLS PON compared with each stream independently established label switched path, the label distributed by the first general-purpose signaling protocol signaling processing module, for each service packet into the optical network unit ONU through packet classification module selects a particular packet traffic flow, and assign a separate cache queue, mapping and add tags via tag mapping module, and then flow through the policy adjustment module based on a leaky bucket mechanism to ensure the smooth flow of traffic flow and meet each parameter negotiation , the last packet into the queue fair scheduling module each traffic flow 所属的队列之间使用基于通用处理器共享的队列公平调度器(GPS),这样使得每个业务流得到最小的保证带宽,并且保证端到端最坏情况下的时延,对于实时性要求强的业务如VoIP和IPTV具有重要意义。 A general purpose processor-based shared queue fair scheduler (GPS), so that each traffic flow to give a minimum guaranteed bandwidth and delay guarantees in the end the worst case, a strong requirement for real-time queues belong the business is important as VoIP and IPTV.

本发明可以同服务提供商本地核心网使用统一的管理平台,在接入网中引入通用多标签交换协议,使得将接入网和服务提供商本地核心网统一起来,通过一个统一的管理平台进行,包括链路管理、资源管理、流量统计和计费等。 The present invention can use the same local service provider core network unified management platform, the introduction of generic multi-protocol label switching in the access network, so that the local access network, core network and service providers to unify, through a unified management platform It includes link management, resource management, traffic statistics and billing.

本发明整个系统采用基于简单PON链路(SPDL)格式封装及简单媒质接入控制协议,GMPLS PON采用了一种髙效的SPDL分组封装格式,并支持标签转发,利用通用标签作为识别分组所属应用及光网络单元ONU的主要方式,这样的优点是提高了分组的封装效率,并能很好的支持标签转发,提高系统整体性能,简化控制复杂度, 相应的媒质接入控制协议也得到简化,属于单个光网络单元ONU的分组按照分发的时隙标签进行发送,而OLT也根据所分发的时隙标签对光网络单元ONU进行时隙标签识别,属于单个应用的分组由分组头标签识别,能很好的支持单播、组播和广播式发送。 The present invention uses the entire system (SPDL) format, and a simple package Medium Access Control protocol based on a simple PON link, the GMPLS PON uses a SPDL Gao efficient packet encapsulation formats, and supports label switching, using generalized label identifying the packet as relevant to the application main mode and the optical network units ONU, so that the advantage of improving the efficiency of packet encapsulation, and forwards the label can be well supported, improve overall system performance, simplify the control complexity, a corresponding media access control protocol is also simplified, packets belonging to a single optical network unit ONU is transmitting timeslot label distribution, but also the time slot OLT optical network unit ONU tag identification label according to the distributed slots, packets belonging to a single application is identified by a packet header tag, can good support unicast, multicast, and broadcast sent.

本发明具有以往的无源光网络技术无法提供的以下功能:(1)将接入网和服务提供商本地核心网紧密的融合在一起,提供统一的智能控制和管理平台,统一资源分配、管理策略,提髙资源利用率,提髙管理水平,降低系统运行成本。 The invention has the function of a conventional passive optical network technology can not provide: (1) to take a close integration of network and service providers local core network together to provide a unified intelligent control and management platform, unified resource allocation, management strategy, mention Gao resource utilization, improve Gao management, reduce system operating costs. (2)提供快速的通用标签转发,标签交换是未来网络主要的交换形式,通过标签可以在面向无连接的因特网架构中引入面向连接特性,加快分组转发速度,提髙业务服务质量, 简化网络控制,优化资源分配,改善网络整体性能。 (2) provides rapid universal tag forwarding, label switching is the next major forms of exchange network, it can be introduced through the label in the Internet Architecture connectionless-oriented connection characteristics, to accelerate packet forwarding speed, mention Gao service quality, simplify network control optimize resource allocation, improve overall network performance. (3)提供了统一的信令系统RSVP, 基于资源预留协议RSVP的信令不仅使得用户可以使用已经存在于用户端设备及操作系统中的RSVP进行服务请求,而且在本发明系统和沿着数据传输路径中的相应路由器设备中都已经对RSVP有着很好的支持,这样的统一信令系统使得用户请求端到端服务时不需要复杂的信令翻译转换,提高了服务请求效率和准确性,加快了服务建立的时间。 (3) provides a unified system signaling RSVP, Resource Reservation Protocol RSVP-based signaling so that the user can not only use the RSVP already present in the client device and the operating system performs the service request, but also in the system of the present invention and along a data transmission path corresponding router devices are already has a good support for the RSVP, the signaling system such that the user requested uniform without complicated signaling translation conversion end services, improve the efficiency and accuracy of service requests speed up the establishment of service time. (4)通过通用多协议标签交换协议GMPLS在无源光网络中引入了面向连接的特性,特别是通过支持集成服务模型IntServ,使得在无源光网络中实现了对每个业务流的管理和资源分配,这对于资源相对有限的接入网环境具有重要的意义,通过对每个业务流进行有效的管理使得保证了每个业务流能够得到保证服务,对于时延性能要求严格的业务能够保证其端到端最坏情况时延。 (4) General Multi Protocol Label Switching GMPLS protocol connection oriented features introduced in a passive optical network, in particular through support the IntServ Integrated Services model, so as to achieve the management of each service stream and in a passive optical network resource allocation, which is of great significance for the relatively limited resources access network environment through effective management of each traffic flow so that ensures that each traffic stream can be guaranteed service performance for latency-critical traffic to ensure its end worst case delay. 附图说明 BRIEF DESCRIPTION

图1为本发明整体结构示意图图2为光线路终端OLT结构框图图3为光网络单元ONU结构框图 FIG 1 a schematic overall configuration of the present invention, FIG 2 is a block diagram illustrating an OLT configuration block diagram of FIG. 3 is an optical network unit ONU

图4为简单无源光网络链路封装格式及字节定义示意图 FIG 4 is a simple passive optical network link and encapsulation format defined schematic bytes

图5为光网络单元内部带宽调度器 5 is an optical network unit internal bandwidth scheduler

图6为本发明系标签交换路径示意图 FIG 6 is a schematic view of a label switched path based invention

图7为本发明体系标签交换路径识别示意图 7-oriented label switched path identifier invention system schematic of FIG.

具体实施方式 Detailed ways

如图l所示,本发明整体结构示意图,包括:一个光线路终端0LT1、多个光网络单元0NU2、宽带无源光分配网3,在一个光线路终端0LT1和多个光网络单元0NU2 之间通过宽带无源光分配网3相连,其特征在于,光线路终端0LT1和光网络单元0NU2作为服务提供商核心网4通用多协议标签交换协议GMPLS域的边缘路由器,与核心网4内另外的GMPLS路由器通过通信链路连接,光线路终端0LT1单独作为系统内集成服务中间路由器,其处于主导地位,所有的通信活动由光线路终端0LT1 控制,光网络单元2单独作为系统内集成服务入口路由器,其属于从属地位,光网络单元0而2具体执行光线路终端0LT1的命令。 As shown in the overall schematic structure of the present invention, comprises as shown in FIG l: 0LT1 one optical line terminal, a plurality of optical network units 0NU2, broadband passive optical distribution network 3, a plurality of optical line terminal and the optical network units 0LT1 between 0NU2 is connected via a broadband passive optical distribution network 3, characterized in that the edge router, and the core network optical line terminal and an optical network unit 0NU2 0LT1 as a service provider core network domain 4 GMPLS Generalized multi-protocol label switching GMPLS protocol router further 4 through a communication link, as a single optical line terminal 0LT1 integrated services intermediate router in the system, which is dominant in all of the communication activity 0LT1 controlled by the optical line terminal, the optical network unit 2 as a separate system integration services within the ingress router, which belongs to the subordination, the optical network unit 2 and 0 execute specific commands 0LT1 optical line terminal.

本发明整个系统可以被认为是服务提供商本地核心网4的边缘设备,把用户的数据中继至核心网,再由核心网负责传送。 The system of the present invention may be considered as a local service provider core network edge device 4, the user data is relayed to a core network, the core network is responsible for transmitting again. 边缘路由器的功能包括,信令控制、接入允许控制、分组头査看分析、分组分类、队列公平调度以及标签映射、流量策略调整、标签交换路径建立、限制路由选择等。 Features include edge routers, signaling control, admission control, packet header analysis view, packet classification, and a label mapping fair scheduling queue, the flow rate adjustment policy, the establishment of label switched path, routing and other restrictions.

如图2所示,光线路终端0LT1的结构框图,其控制平面和数据业务平面分离, 其中控制平面包括:通用信令处理模块5、接入允许控制模块6、管理模块7、路由 2, a block diagram of an optical line terminal 0LT1, the control plane traffic and data plane separation, wherein the control plane comprises: common signaling processing module 5, admission control module 6, 7 management module, route

12模块8,数据平面有通用标签转发模块9,由用户或者光网络单元0NU2发出的服务或者控制请求首先进入控制平面的通用信令处理模块5进行分析处理,涉及到系统控制和其他服务的控制直接由扩展的信令模块处理,涉及到服务接纳控制的消息和参数交由接入允许控制模块6决定是否接纳该请求,接入允许模块6根据接入网本身资源状况和核心网的资源状况进行相应的接入允许控制算法计算,如果接入网有足够资源而核心网没有相应的资源,还必须通过通用信令处理模块5和路由模块8 向核心网发出服务请求,如果服务接纳则最终返回确认至用户并告知相关的各项用于配置光网络单元0NU2中数据平面各模块的参数和分发给此连接的标签值,服务连接建立后光线路终端0LT1的数据平面只需要简单的通用标签转发模块9对由光网络单元0NU2中继的用户发送的数据进行通 8 module 12, universal tag data plane forwarding module 9, the control service or sent by the user or request 0NU2 first optical network unit into the general control plane signaling processing module 5 analyzes and processes, involving the control system and other services directly processed by the extended signaling module, the service admission control related to the messages and parameters referred admission control module 6 determines whether to accept the request, the access module 6 allows the resource situation itself and the core network resource situation in accordance with the access network corresponding admission control algorithm, if the access network and the core network has sufficient resources do not have the resources, must also issue a service request to the core network 5 via a universal signaling processing module and a routing module 8, receiving the service if the final returns an acknowledgment to the user and inform the relevant parameters for each data plane 0NU2 the module configuration of the optical network unit and the label value distributed for this connection, the service connection is established the data plane 0LT1 optical line terminal only requires a simple universal tag forwarding module 9 0NU2 data transmitted by the relay unit through an optical network users 标签的认定和转发。 Identification and forwarding labels.

如图3所示,光网络单元0NU2的结构框图,其控制平面和数据业务平面分离, 其中控制平面包括:通用信令处理模块10、管理模块11,数据平面有分组分类模块12、标签映射模块13、流量策略调整模块14和队列公平调度模块15,用户所提出的服务请求由光网络单元0NU2负责转发,当光线路终端0LT1决定接纳用户请求后,通过光线路终端0LT1的通用信令处理模块5向光网络单元ONU2发出信令表明连接接纳并告知相关的各项参数和分发的标签值,光网络单元0NU2数据平面的各模块必须根据接纳确认的各项参数进行配置,其中分组分类模块12对用户分组进行分类并将属于同一个应用数据流的分组置入单独的队列缓存中,然后标签映射模块13负责对每个分组进行标签的映射工作,此后分组经由流量策略调整模块14 进行流量的调整使之符合所协商的流量参数,最后各应用数据流 3, a block diagram of an optical network unit 0NU2, the control plane traffic and data plane separation, wherein the control plane comprises: common signaling processing module 10, management module 11, with a data plane packet classifier module 12, label mapping module 13, adjusting module 14 and a traffic policy queue fair scheduling module 15, the service request made by the user forwarded by the optical network unit responsible 0NU2, the optical line terminal after receiving a user request 0LT1 decided by common optical line terminal to the signaling processing module 0LT1 5 ONU2 issued to the optical network unit is connected to receive and inform a signaling tag indicates that the associated values ​​of the parameters and the distribution of the optical network unit 0NU2 plane data of each module must be configured according to confirm receiving the parameters, wherein the packet classification module 12 classifying and grouping users into separate packets belonging to a same queue buffer application data stream, and the label mapping module 13 is responsible for mapping the label for each packet work, after the packet flow 14 through a flow rate adjustment policy module adjusted to conform to the negotiated traffic parameters, and finally each application data stream 分组在队列公平调度模块15的调度之下向光线路终端0LT1发送分组数据。 Packet transmission packet data to the optical line terminal 0LT1 under fair scheduling module scheduling queue 15.

如图4所示,本发明简单无源光网络链路封装格式,图中只给出第i个光网络单元ONU的帧结构,其中整个光网络单元0NU2的发送时隙包括一个帧预同步头(视不同物理层参数进行设置),用于调整光线路终端OLT的同步时间和接收功率调整, 每个发送时隙包含若干个帧,每个帧结构如图所示,包括长度域(2字节)、协议类型域(2字节)、标签/0NUid域(4字节)、帧头校验(2字节)、数据域(0-4096字节) 和可选的帧校验(4字节)。 4, the present invention is a simple passive optical network encapsulation link, of which only gives the i-th optical network units ONU a frame structure, in which the entire optical network unit comprises a transmission slot 0NU2 pre synchronization header frame (depending on the different physical layer parameter settings), for adjusting an OLT synchronization time and to adjust reception power, transmission time slots each comprising a plurality of frames, each frame structure as shown in Fig, comprising a length field (2 characters section), a protocol type field (2 bytes), a tag / 0NUid field (4 bytes), header checksum (2 bytes), data fields (0-4096 bytes) and an optional frame check (4 byte). 其中标签/0而id域结构如图所示,下行包括保留域(20 比特)和ONU id域(8比特),上行包括标签域(20比特)和保留域(8比特)。 Wherein the tag / id 0 and domain structure as shown in FIG downlink including a field (20 bits) and the ONU id field (8 bits), the uplink include a label field (20 bits), and reserved field (8 bits). 数据域包括若干个独立的IP分组,但需要具有相同的标签。 Data field comprising several independent IP packets, but the need to have the same label. 这种帧结构很好的适应了本系统的运行,支持标签交换,并具有很髙的封装效率。 This frame structure well adapted to the operation of the system, supports label switching, and have a very Gao encapsulation efficiency.

如图5所示,光网络单元ONU内部带宽调度器的结构,此结构充分体现了面向连接的服务模型的特点。 5, the configuration of the optical network unit ONU scheduler internal bandwidth, this structure sufficiently reflects the characteristics of the connection-oriented service model. 在调度器的最外部是一个基于优先级的队列调度器,分别为保证业务类、可控负载类和尽力而为类业务提供优先级服务,其中每个类都有一个专用的缓存队列用于缓存不同业务类别的用户分组。 At the outermost scheduler is a priority-based queue scheduler, respectively, to ensure that traffic class, the class and best effort class controlled load service provides priority service, wherein each class has a dedicated buffer queue for user group cache different traffic classes. 在每个服务类别的单个应用之间使用加权公平队列调度器WFQ提供基于流的分组调度。 Using the weighted fair queue scheduler provides WFQ scheduling based on packet flow between a single application for each service category. 业务流在进入光网络单元0NU2后经过分类进入为每个流设置的单独的缓存中等待服务,经过标签映射和流量的监测调整后,业务流按照协商的流量参数进入调度器进行服务。 Traffic flow after entering through the optical network unit 0NU2 classified into the stream as a separate cache provided for each service in the wait, after monitoring and adjusting the flow label mapping service flow enters the scheduler for the service according to the negotiated traffic parameters. 加权公平队列调度器WFQ是基于通用处理器共享GPS类的调度器,对于符合漏桶参数的业务流 Weighted Fair Queuing WFQ scheduler is based on a general purpose processor-based shared GPS scheduler, the parameters for the leaky bucket conform to the traffic flow

分配加权系数^,根据加权系数和整个调度器的服务速率,可以为每个接入的业务流/提供最小公平保证服务g,;rA/Z二A ,并可以保证其最坏情况端到端时延<2^/^+丄„^",其所消耗的最大缓存量也可以准确的计算为 ^ Weighting coefficients are assigned according to the weighting coefficients and the entire service rate of the scheduler can be / is provided for each access service flow fair minimum guaranteed service g,; rA / Z two A, and may guarantee a worst case end delay <2 ^ / ^ + Shang, "^", consumes the maximum buffer amount can be accurately calculated as

^ ^ A + Anax ,对于时延要求强的业务如VoIP和IPTV具有重要作用。 ^ ^ A + Anax, delay requirements for strong and IPTV services such as VoIP an important role. 如图6所示,本发明无源光网络系统体系标签交换路径示意图,用户分组流进入光网络单元0NU2后分配相应的分组流标签交换路径,所有属于统一光网络单元0NU的分组流在光网络单元0NU2处进行汇聚,嵌套入光线路终端0LT1分发给光网络单元0NU2的发送时隙标签交换路径,在光线路终端0LT1处接收到的时隙标签路径可以被快速识别,然后根据单个业务流的分组标签头选择标签转发动作。 6, the passive optical network system architecture of the present invention, a schematic view of a label switched path, and allocating a corresponding packet flow label switched path when the user enters the optical network unit packet flow 0NU2, all belong to the same packet optical network unit in an optical network flow 0NU at 0NU2 unit to be aggregated, the optical line terminal nested 0LT1 distributed optical network units transmit slot of LSP 0NU2, received at the optical line terminal 0LT1 slot label path can be quickly identified, and then a single stream according to traffic the packet header tag label forwarding action selected. 经过光线路终端0LT1后,所有属于光线路终端0LT1的业务流进行汇聚,并嵌套入进入核心网4的其他体系标签交换路径,包括时隙、波长和光纤端口。 After 0LT1 optical line terminal, all the traffic flows belonging to the optical line terminal performs 0LT1 aggregation, and nested into the other system, the core network 4 of a label switched path, including slots, and the wavelength of the optical fiber port.

如图7所示,本发明无源光网络系统体系标签交换路径识别示意图,各分组 , LSP identification system schematic PON system of the present invention shown in Figure 7, each packet

流标签交换路径《,在光网络单元0NU2处汇聚入时隙标签交换路径 Flow LSP ", in the optical network unit at the convergence of the slots 0NU2 LSP

(K ,T ),整个传输时隙按照时隙标签进行寻址和识别,光线路单元0LT1 在每个传输循环开始前需要告知每个光网络单元0NU2其发送时隙标签,光网络单元0NU2根据发送时隙打开物理层设备进行数据发送,光线路单元0LT1接收到数据 (K, T), the entire transmission time slot according to the time slot addressing and identification tag, an optical line unit 0LT1 need to tell each optical network unit before the start of each transmission cycle of its transmit timeslots 0NU2 tag, according to the optical network unit 0NU2 transmission slot opens physical layer device performs data transmission, optical line unit receives the data 0LT1

T加W T6W/ T plus W T6W /

后根据当前时隙标签(;,7;)识别所属光网络单元0NU2,然后根据各业务流的分组流标签识别各业务流,这样整个系统中每个业务流可以由唯一的体系标签 The label after the current slot (;, 7;) identifying the optical network unit belongs 0NU2, then the packet according to traffic flow label identifying each traffic flow of each stream, so that the entire system can be unique for each service flow by the system tags

(7; ,t; , A)识别。 (7;, t;, A) recognition.

Claims (9)

1、一种基于通用多协议标签交换协议的无源光网络系统,包括:一个光线路终端OLT(1)、多个光网络单元ONU(2)、宽带无源光分配网(3),在一个光线路终端OLT(1)和多个光网络单元ONU(2)之间通过宽带无源光分配网(3)相连,其特征在于,光线路终端OLT(1)和光网络单元ONU(2)作为服务提供商核心网(4)通用多协议标签交换协议GMPLS域的边缘路由器,与核心网(4)内另外的GMPLS路由器通过通信链路连接,光线路终端OLT(1)单独作为系统内集成服务中间路由器,其处于主导地位,所有的通信活动由光线路终端OLT(1)控制,光网络单元(2)单独作为系统内集成服务入口路由器,其属于从属地位,光网络单元ONU(2)具体执行光线路终端OLT(1)的命令;所述的光线路终端OLT(1)由控制平面和数据平面组成,其控制平面包括:通用信令处理模块(5)、接入允许控制模块(6)、管理模块(7)、路由模 1, based on multi-protocol label switching protocol common passive optical network system, comprising: a the OLT optical line terminal (1), a plurality of optical network units ONU (2), a broadband passive optical distribution network (3), in (3) is connected via a broadband passive optical distribution network between an optical line termination OLT (1) and a plurality of optical network units ONU (2), characterized in that the optical line termination OLT (1) and the optical network units ONU (2) as a service provider core network (4) General multi protocol label switching GMPLS protocol domain edge router, and a core network (4) further GMPLS routers connected via a communication link, the optical line termination OLT (1) integrated in the system as a separate service intermediate routers, which is dominant in all of the communication activity (1) controlled by the optical line terminal the OLT, optical network unit (2) alone as the system integration services ingress router, which belongs to the subordinate position, the optical network unit the ONU (2) DETAILED performing optical line termination OLT (1) a command; the optical line termination OLT (1) by the control and data planes, whose control plane comprises: universal signaling processing module (5), to allow the access control module ( 6), the management module (7), the routing module (8),数据平面有通用标签转发模块(9);所述的光网络单元ONU(2)由控制平面和数据平面组成,其控制平面包括:通用信令处理模块(10)、管理模块(11),数据平面包括:分组分类模块(12)、标签映射模块(13)、流量策略调整模块(14)和队列公平调度模块(15);光线路终端OLT(1)的管理模块(7)通过信令或网络管理协议与光网络单元ONU(2)的内部管理模块(11)建立管理连接,向光网络单元ONU(2)的内部管理模块(11)下达内部管理命令,对光网络单元ONU(2)内部的各模块进行管理、参数配置和状态信息的收集报告,光线路终端OLT(1)管理模块(7)还同核心网的统一管理平台的连接依靠外部管理接口和协议,负责将系统内部的状态信息报告给统一的网络管理平台,进行相关的管理参数的传递、协商和配置,以及故障告警和计费;光网络单元ONU(2)的管理模块(11)的管理内容、指令和相关 (8), the data plane forwarding module universal tag (9); the optical network units ONU (2) by the control and data planes, whose control plane comprising: a universal signaling processing module (10), the management module ( 11), the data plane comprising: a packet classification module (12), the label mapping module (13), traffic policy adjustment module (14) and queue fair scheduling module (15); an optical line terminal OLT (1) of the management module (7) establish a connection management, internal management command issued to the optical network units ONU (2) an internal management module (11) via network management protocol and signaling or optical network units ONU (2) an internal management module (11), the optical network units ONU (2) within each module management parameter settings and status collection report information, the optical line terminal OLT (1) management module (7) also relies on an external management interface and protocol with the connector unified management platform core network responsible the internal state of the system information is reported to a unified network management platform, the management transfer related parameter negotiation and configuration, and failure alarm and billing; optical network unit ONU (2) a management module (11) to manage content, Directive and the relevant 参数均通过信令或网络管理协议从光线路终端OLT(1)内部的管理模块(7)获得,并负责向光线路终端OLT(1)的管理模块(7)进行运行状态信息的报告、故障告警以及运行参数的协商。 Signaling or parameters are obtained by the network management protocol from the optical line termination OLT (1) inside the management module (7), and is responsible for the operation state information to the optical line termination OLT (1) of the management module (7) reports failure negotiated an alarm and operating parameters.
2、 根据权利要求1所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,所述光线路终端0LT(1)的控制平面中通用信令处理模块(5)接收来自用户或者光网络单元0NU(2)的服务请求后进行分析处理,然后交由接入允许控制模块(6)决定是否接纳该请求,接入允许控制模块(6)根据接入网本身资源状况和核心网的资源状况进行相应的接入允许控制算法计算,如果接入网有足够资源而核心网没有相应的资源,则必须通过路由模块(8)向核心网继续发出服务请求并最终返回确认至用户,服务连接建立后由光线路终端0LT(1)数据平面负责数据处理,且只需要通过简单的通用标签转发模块(9)对用户发送的数据进行通用标签的认定和转发,管理模块(7)通过内部管理接口和协议与控制平面和数据平面内的各个功能性模块连接,负责对各模块进行管理,包括:策略控 2. The passive optical network system based on a common multiprotocol label switching protocol according to claim 1, characterized in that the optical line terminal 0LT (1) a common control plane signaling processing module (5) receiving analyzing and processing the user or the optical network unit 0NU (2) a service request, and passes it admission control module (6) decides whether to accept the request, the admission control module (6) according to its own resources and access network status resources corresponding core network admission control algorithm, if there are enough resources access network and core network resources are not, it must continue to send a service request to the core network through a routing module (8) and finally back to the confirmation after the user, the service connection is established by the optical line terminal 0LT (1) data plane is responsible for data processing, and requires only the data sent by the user finds universal tag and forwarding by a simple universal tag forwarding module (9), the management module (7 ) by the internal management and control plane interfaces and protocols and the functionality of the various modules within data plane connections, is responsible for managing each of modules, comprising: a policy control 、参数配置、告警、计费、状态信息收集和报告。 , Parameter configuration, alarms, billing, collection and reporting status information.
3、 根据权利要求1所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,所述光网络单元0NU(2)的控制平面的通用信令处理模块(10)负责向光线路终端0LT(1)发起服务请求并接收来自光线路终端OLT(l)的信令指令,并通过内部接口对光网络单元0NU(2)的数据平面模块进行参数配置,光网络单元0NU(2)的数据平面的分组分类模块(12)对分组进行分类并将属于同一个应用数据流的分组置入单独的队列缓存中,然后标签映射模块(13)负责对每个分组进行标签的映射工作,此后分组经由流量策略调整模块(14)进行流量的调整使之符合所协商的流量参数,最后各应用数据流的分组在队列公平调度模块(15)的调度之下向光线路终端0LT(1)发送分组数据,管理模块(7)通过内部管理接口和协议与控制平面和数据平面内的各个功能性模块连接,负责对各模块进行管理和参 3. The passive optical network system based on a common multiprotocol label switching protocol according to claim 1, characterized in that the optical network unit 0NU (2) a common control plane signaling processing module (10) is responsible for the the optical line terminal 0LT (1) initiates a service request and receive signaling an instruction from the optical line terminal OLT (l), and the optical parameter configuration network unit 0NU (2) a data plane via an internal interface module, the optical network unit 0NU ( into a separate packet queue buffer 2) of the data plane packet classification module (12) for classifying a packet belonging to the same application and the data stream, and label mapping module (13) is responsible for mapping the label to each packet work, after which the packet flow rate is adjusted via the flow rate adjustment policy module (14) to conform to the negotiated traffic parameters, the last application packet of each data stream to the optical line terminal 0LT under fair scheduling module scheduling queue (15) ( 1) transmitting packet data, management module (7) by the internal management and control plane interfaces and protocols and functionality of the various modules within data plane connections, each module is responsible for managing and reference 配置、并负责状态信息收集、报告。 Configuration and status information is responsible for the collection, reporting.
4、 根据权利要求2或者3所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,通用标签转发模块(9)和标签映射模块(13)采用通用标签交换技术实现无源光网络数据向核心网(4)的快速标签转发,在无源光网络中使用分组头标签、 时隙或者波长作为标签,形成体系标签转发,分组头标签用于识别粒度最小的单位, 用于区分每个应用数据流,建立基于流的标签交换路径,属于同一个光网络单元0NU(2)的所有基于流的标签交换路径在光网络单元0NU(2)处进行汇聚,嵌套入基于时隙标签的标签交换路径,上行数据由光网络单元0NU(2)向光线路终端0LT(1)传输,光线路终端0LT(1)根据时隙标签识别所有属于一个光网络单元0NU(2)的应用数据流,而使用分组头标签识别光网络单元0NU(2)内部的应用数据流,用户数据在到达光线路终端0LT(1)后,只需根据己定的标签 4. The passive optical network system based on a common multi-protocol label switching protocol 2 or claim 3, characterized in that the universal tag forwarding module (9) and the label mapping module (13) using a common label switching technology without network data source light (4) fast forwarding tag to the core network using the packet header tags, or wavelength slot in a passive optical network as the label, the label forming system forwarding the packet header tag identifying the minimum granularity for the unit, with application to distinguish each data stream based on the establishment of label switched path flow, belong to the same optical network unit 0NU (2) converges for all the optical network units 0NU (2) at a flow-based label switched path, based on the nested slots tag label switched path, upstream data from the optical network units 0NU (2) to the optical line terminal 0LT (1) transmission, an optical line terminal 0LT (1) the identification tag all the time slots belonging to an optical network unit 0NU (2) application data stream, using the packet header tag identifying the optical network unit 0NU (2) inside the application data stream, user data reaches the optical line terminal after 0LT (1), only a label in accordance with chlorhexidine 发策略进行快速转发,下行数据仍然按照广播式发送。 Strategy hair fast-forwarding, the data is still sent in the downlink broadcast.
5、 根据权利要求2或者3所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,通用信令处理模块(5、 10)采用资源预留协议RSVP及其扩展作为GMPLS PON的控制信令,资源预留协议RSVP本身不仅作为资源预留协议,还用于用户服务请求、通用标签的请求和分配以及PON通信控制,在整个系统中用户使用资源预留协议RSVP发起服务请求,光网络单元0NU(2)负责将请求向光线路终端OLT(l)进行转发,光线路终端0LT(1)接收到请求后经过管理及接入允许控制决定是否接纳该请求,如果接纳则预留相应的资源,并分配其通用转发标签,建立通用标签交换路径, 由于PON中有自动发现、注册和测距的控制功能,将PON的控制功能由资源预留协议RSVP携带以完成PON控制功能。 5. The passive optical network system based on claim 2 or 3 generic multi-protocol label switching protocol, characterized in that the common signaling processing module (5, 10) uses the Resource Reservation Protocol RSVP and its extension as a GMPLS PON control signaling, resource reservation protocol RSVP itself not only as a resource reservation protocol, further configured to request and allocation and a communication control PON user service requests, the universal tag, in the entire system user initiates a service resource reservation protocol RSVP after the request to allow the access and management, the optical network unit 0NU (2) is responsible for forwarding the request to the optical line termination OLT (l), the optical line terminal 0LT (1) receiving a request for admission control determines whether the request is accepted if reserve the appropriate resources and common allocated its forwarding label, the label switched path establishment general, since the PON automatic discovery, registration and control functions ranging, the PON control function is carried by resource reservation protocol RSVP to complete the PON control Features.
6、 根据权利要求2或者3所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,光线路终端OLT(l)、光网络单元(2),采用集成服务模型改善对单个应用数据流的服务质量,引入集成服务模型,每个应用数据流都向光线路终端0LT(1)请求建立连接,经过接入允许控制模块(6)接纳后建立连接,连接建立后整个系统则为每个流都建立独立的标签交换路径,通过通用信令处理模块(5)信令协议进行标签的分发,每个应用数据流的分组在进入光网络单元0NU(2)后经过分组分类模块(12)选择出特定的应用数据流的分组,并为其分配单独的缓存队列,经由标签映射模块(13)进行标签的映射和添加,然后通过基于漏桶机制的流量策略调整模块(14) 保证每个应用数据流的流量平稳并符合协商的参数,最后分组进入队列公平调度模块(15)在每个应用数据流所属的队列 6. The passive optical network system based on a common multi-protocol label switching protocol 2 or claim 3, characterized in that the optical line terminal OLT (l), an optical network unit (2) with an integrated service model improvement quality of service of the individual application data stream, introducing the integrated service model, each application data stream (1) to the optical line terminal 0LT request to establish a connection, via admission control module (6) after receiving a connection after the connection is established throughout the system each stream was independently established label switched path through a generic signaling processing module (5) label distribution signaling protocol, each packet entering the application data stream 0NU optical network unit (2) via packet classification module (12) selected a particular packet data application flows, and assign a separate buffer queue, and mapping add tags via tag mapping module (13), and the flow rate adjustment policy module based leaky bucket mechanism (14 ) to ensure the smooth flow of data streams to each application and in accordance with the negotiated parameters, the last packet into the queue fair scheduling module (15) in each stream queue belongs to the application data 间使用基于通用处理器共享的队列公平调度器。 Shared between a general purpose processor-based fair scheduler queue.
7、 根据权利要求1或者2或者3所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,光线路终端0LT(1)和光网络单元0NU(2)采用GMPLS协议和集成服务IntServ模型所要求的控制平面、数据平面分离的运行模式,控制平面和数据平面分离,用户在服务建立之前通过光线路终端0LT(1)和光网络单元0NU(2)的控制平面信令互通进行服务请求和协商,服务提供商根据接入允许控制确认是否接纳, 保证网络运行状态的平稳,所有的通信控制消息和控制功能都通过控制平面的信令模块完成,连接建立后,数据平面则完成数据的分类、处理和转发操作,控制平面通过内部接口对数据平面进行动态配置。 7, according to one or based on Universal Multiprotocol Label Switching protocols passive optical network system of claim 2 or 3, wherein the optical line terminal 0LT (1) and an optical network unit 0NU (2) as claimed in claim using GMPLS protocol and integration the control plane service IntServ model is required, the data plane separation operation mode, the control plane and data plane separation, the user through the optical line terminal 0LT (1) and an optical network unit 0NU (2) a control plane signaling interworking prior service establishment negotiation and service requests, the service provider to confirm whether to accept the admission control to ensure the smooth operation of the network status, communication control message and all control functions are accomplished by the control plane signaling module, the connection is established, the data is accomplished according to the plane data classification, processing and forwarding operation, dynamically configure the control plane data plane via an internal interface.
8、 根据权利要求1所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,光线路终端OLT(l)、多个光网络单元0NU(2)、宽带无源光分配网(3)组成的无源光网络系统,作为服务提供商核心网(4)的边缘设备,核心网(4)的边缘路由器功能集成到PON设备中,边缘路由器的功能包括:信令控制、接入允许控制、分组头査看分析、分组分类、队列公平调度以及标签交换路径建立、限制路由选择, 光线路终端0LT(1)负责处理所有复杂的控制平面功能,包括信令控制、接入允许控制以及路由和管理功能,而光网络单元ONU(2)具体负责处理所有复杂的数据平面功能,包括分组头査看分析、分组分类、队列公平调度以及标签交换路径建立。 8. The passive optical network system based on a common multiprotocol label switching protocol according to claim 1, wherein the optical line terminal OLT (l), a plurality of optical network units 0NU (2), broadband passive optical distribution network (3) consisting of passive optical network system, a service provider core network (4) an edge device, core network (4) of the edge router functionality into PON device, edge router functions comprising: signaling control, admission control, packet header analysis view, packet classification, scheduling, and fair queue label switched path is established, the routing restrictions, the optical line terminal 0LT (1) responsible for processing all the complex functions of the control plane, comprising a signaling control, access and allows control of routing and management functions, and the optical network unit ONU (2) specifically responsible for handling all the complex functions of the data plane, a packet comprising a header analysis view, packet classification, scheduling, and fair queue label switched path is established.
9、根据权利要求1所述的基于通用多协议标签交换协议的无源光网络系统,其特征是,光线路终端OLT(l)、多个光网络单元0NU(2)、宽带无源光分配网(3)组成的无源光网络系统,采用基于简单PON链路SPDL格式封装及简单媒质接入控制协议, SPDL分组封装格式支持标签转发,利用通用标签作为识别分组所属应用数据流及光网络单元ONU(2)的方式,属于单个光网络单元0NU(2)的分组由光网络单元0NU(2) 时隙标签识别,属于单个应用数据流的分组由分组头标签识别,采用简单媒质接入控制,支持单播、组播和广播式发送。 9. The passive optical network system based on a common multiprotocol label switching protocol according to claim 1, wherein the optical line terminal OLT (l), a plurality of optical network units 0NU (2), broadband passive optical distribution network (3) consisting of passive optical network system, using, packet encapsulation formats supported SPDL label format based on a simple PON link SPDL simple packaging and forwarding media access control protocol, using the universal tag identifying a packet as a data stream and an optical network application belongs units ONU (2) manner, belong to a single optical network unit 0NU (2) a packet by the optical network unit 0NU (2) identification tag slots, packets belonging to a single application data packet stream is identified by a tag header, a simple media access control, support unicast, multicast, and broadcast sent.
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