CN101087238B - Dynamic bandwidth allocation device and method of passive optical network - Google Patents

Dynamic bandwidth allocation device and method of passive optical network Download PDF

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CN101087238B
CN101087238B CN 200710106277 CN200710106277A CN101087238B CN 101087238 B CN101087238 B CN 101087238B CN 200710106277 CN200710106277 CN 200710106277 CN 200710106277 A CN200710106277 A CN 200710106277A CN 101087238 B CN101087238 B CN 101087238B
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optical network
service
authorization
bandwidth
onu
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CN 200710106277
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CN101087238A (en
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刘昱
洪建明
谭培龙
赵峻
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华为技术有限公司
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Abstract

The invention relates to optical communication field, discloses a collating device and method for dynamic bandwidth in source-free optical network, and the distribution method for dynamic bandwidth is transparent, which can satisfy the requirement for different service, improve the utilization rate of bandwidth, realize the fair distribution for bandwidth, good haleness, real time, and can distribute bandwidth for different port, and support to release offline bandwidth of ONU. The distributing device for dynamic bandwidth in source-free optical network includes ascending service active fibernetwork unit bit-mapping register, ascending service active port bit-mapping table, ascending virtual media accessing control sub-layer information table, descending virtual media accessing control sub-layer authorization information table; said distributing device for dynamic bandwidth, consults said fiber network unit active information, port active information and length information of sendingdata, according to preset priority of different service, process the service flow according to priority according to preset priority, and distributes the dynamic bandwidth for ports.

Description

无源光网络的动态带宽分配装置及方法 Dynamic bandwidth allocation apparatus and method for a passive optical network

技术领域 FIELD

[0001] 本发明涉及光通信领域,特别涉及无源光网络的动态带宽分配装置及方法。 [0001] The present invention relates to optical communications, and more particularly to a passive optical network, dynamic bandwidth allocation method and apparatus.

背景技术 Background technique

[0002] 无源光网络(Passive Optical Network,简称〃 PON")是指光配线网中不含有任何电子器件及电子电源,全部由光分路器等无源器件组成,不需要贵重的有源电子设备的一种光接入网。PON作为一种新兴的覆盖最后一公里的宽带接入光纤技术,其在光分支点不需要节点设备,只需安装一个简单的光分支器即可,因此具有节省光缆资源、带宽资源共享、节省机房投资、设备安全性高、建网速度快、综合建网成本低等优点。PON的低成本已经使其成为光纤到大楼(Fiber To The Building,简称〃 FTTB")、光纤到路边(FiberToThe Curb,简称"FTTC")、光纤到家庭(Fiber To The Home,简称"FTTH")等FTTx网络的最理想的宽带接入方式。 [0002] PON (Passive Optical Network, abbreviated 〃 PON ") refers to the optical wiring network does not contain any electronic devices and electronic power, all optical splitters and other passive components composition, there does not need expensive one source of optical access network .PON electronic device as a new cover of the last one kilometer broadband access optical fiber technology, which does not require the optical branching point node device, only a simple optical splitter is mounted to, Therefore, the cable has to save resources, bandwidth sharing, saving room investment, high security device, rapidity fast, comprehensive and low cost network construction cost has .PON makes fiber to the building (fiber to the building, referred to 〃 FTTB "), fiber to the curb (FiberToThe curb, referred to as" FTTC "), FTTH (fiber to the home, referred to as" the best broadband access of FTTH ") and other FTTx networks.

[0003] PON作为目前光接入网的主要类型,主要分为异步传输模式无源光网络(ATMPassive Optical Network,简称〃 AP0N 〃 )和以太网无源光网络(Ethernet PassiveOptical Network,简称"EPON"),是点到多点的主从控制结构,如图1所示,光纤线路终端(Optical Line Terminal,简称〃 0LT〃 )为主结点设备,通过光分路器与多个光纤网络单元(Optical Network Unit,简称"ONU")相连,并进行ONU注册、待发数据授权、媒体接入控制子层(MediaAccess Control sub layer,简称"MAC")消息交互等处理;ONU为从结点设备,响应OLT发现消息,上报待发数据长度,根据授权信息进行各端口数据的发送,并且下挂多个用户终端,支持多业务并行。 [0003] PON optical access network as a main type of the current, is divided into ATM passive optical network (ATMPassive Optical Network, abbreviated 〃 〃 AP0N) and an Ethernet passive optical network (Ethernet PassiveOptical Network, referred to as "EPON" ), the main control structure from the point to multipoint, as shown in FIG optical line terminal (optical line terminal, referred 〃 0LT〃) 1:00 dominated node device through the optical splitter and a plurality of optical network units ( Optical Network Unit, referred to as "ONU") is connected, and ONU registration, authorization outgoing data, media access control sublayer (MediaAccess control sub layer, referred to as "MAC") processing such as message interaction; ONU is a slave node device, OLT discovery response message, reports the outgoing data length, each port transmits data in accordance with the authorization information and the plurality of user terminals linked to support multiple concurrent operations. 在光接入网的此种框架结构下,如何合理分配带宽、有效利用网络资源并满足业务需求,成为PON MAC方案中很重要的内容。 In this frame structure optical access network, how a reasonable allocation of bandwidth, efficient use of network resources and business needs, become PON MAC scheme very important element. [0004] 光接入网中,带宽分配有两种方式:静态带宽分配(StaticBandwidthAllocation,简称〃 SBA〃 )禾口动态带宽分配(Dynamic Bandwidth Allocation,简称"DBA")。 [0004] In optical access network, the bandwidth allocation in two ways: Static Bandwidth Allocation (StaticBandwidthAllocation, referred 〃 SBA〃) Wo port dynamic bandwidth allocation (Dynamic Bandwidth Allocation, referred to as "DBA"). 静态带宽分配固定分配各ONU或其端口的带宽,未用时隙不能被抢占,带宽利用率比较低,并且对高突发率的自似然业务适应力不强。 Static bandwidth allocation, or a fixed allocation bandwidth of each ONU port, the slot is not used can not be preempted, bandwidth utilization is relatively low, and the self-likelihood service with high burst ratio resilience is not strong. 动态带宽分配算法是一种基于当前用户业务需求进行快速带宽重分配的机制或算法,可根据ONU突发业务的要求,通过在ONU之间动态调节带宽来提高PON带宽利用率。 Dynamic bandwidth allocation algorithm is based on the current user traffic needs mechanism or the bandwidth reallocation algorithm is fast, according to the requirements of bursty traffic ONU to increase the PON bandwidth utilization by dynamically adjusting bandwidth between ONU.

[0005] 目前有多种动态带宽分配方法,比如,以加州大学Davis分校、Alloptic公司雇员Glen Kramer为主提出的称为周期自适应交叉轮循(InterleavedPolling withAd即tive Cycle Time,简称〃 I PACT 〃 )的PON动态带宽分配方法;国际电信联盟标准部(International Telecommunication Union-Telecommunication StandardizationSector,简称〃 ITU-T")的G. 983. 4标准提出的一种特别针对APON的DBA协议等。[0006] 在美国专利US6546014中描述的IPACT方法的主要思路是来自前一ONU的发送数据到达OLT之前就轮循下一ONU以确定是否授权及授权额度等信息。下面参照图2描述这一方法的某些细节,图中以一个OLT与三个OUN通信为例进行方法描述。假定某轮询周期开始时刻tO, OLT有每个ONU的待发数据长度及环路传输时延(Round Trip Time,简称〃 RTT〃 )信息,并存储在轮询表(Polling Table)中。 [0005] There are a variety of dynamic bandwidth allocation method, for example, to the University of California, Davis, Alloptic company employees Glen Kramer-based adaptive cross cycle called the proposed round-robin (InterleavedPolling withAd ie tive Cycle Time, referred 〃 〃 I PACT ) dynamic bandwidth allocation method in the PON;. G. standards ITU (International Telecommunication Union-Telecommunication StandardizationSector, referred 〃 ITU-T ") proposed by the 983.4 standard for a special for APON DBA protocol [0006] in U.S. Patent No. US6546014 IPACT main idea of ​​the method described with regard to the next ONU before the OLT sends polling data from the previous to the ONU reaches, and determining whether to authorize credit authorization information. this method of describing certain 2 below with reference to FIG. detail, FIG OLT OUN to communicate with a three example methods described. assumes a polling cycle starting time tO, OLT to each ONU has a pending data transmission delay loop length and (Round Trip time, referred 〃 RTT〃) information, and is stored in the polling list (polling table) in.

[0007] 如图2中(a)所示,0LT在轮询周期开始时,给0NU1发送授权信息,允许其发送6000字节。 [0007] As shown in FIG. 2 (a) shows, at the start of polling period 0LT, 0NU1 transmitting authorization information to allow it to send 6000 bytes. 收到授权信息后,ONU发送数据直到授权窗口结束。 After receiving authorization information, ONU transmit data until the end of the authorization window. 在向OLT发送数据的同时, ONU—直从下挂的用户终端接收数据,并做缓存。 While transmitting data to the OLT, ONU- straight hanging from the user terminal to receive data, and make the cache. 在发送数据的最后,ONU产生下一轮待发数据信息,并上报。 In the latter, the ONU generates an outgoing data transmission data information, and reporting. 图中为550字节。 FIG as 550 bytes.

[0008] 如图2中(b)所示,在收到前一个ONU的响应之前,0LT计算前一个0NU数据的最后一个比特到达的时间:第一比特的到达时间(该0NU的RTT)加上该ONU授权的发送数据长度。 [0008] As shown in FIG. 2 (b), until a response is received before the ONU, the last bit arrives before the time a calculation 0LT 0NU data: time of arrival of the first bit (the 0NU the RTT) plus ONU transmits the authorization data length. 于是0LT便可根据下一0NU的RTT信息,在确切的时刻发送下一0NU的授权信息,使得前后两个0NU的数据发送窗口仅相差一个保护带。 The RTT can thus 0LT 0NU next information, and transmits authorization information in the next 0NU exact moment, both before and after such a data transmission window 0NU differ only by a guard band.

[0009] 如图2中(c)所示,当0NU1的数据全部被0LT接收以后,0LT根据附带的下一轮待发数据信息更新轮询表中的信息,作为下一轮轮询周期的参考数据。 [0009] As shown in FIG. 2 (c), when after all data is received 0NU1 0LT, 0LT according to the information included with the outgoing data is a polling list update information as a next polling period reference data. 对于RTT信息的更新,0LT通过对授权信息发送和数据接收的跟踪获取。 For RTT update information, 0LT authorization information obtained by tracking the data transmission and reception. [0010] 如图2中(d)所示,0LT对0NU2、 0NU3做同样处理。 [0010] As shown in FIG. 2 (d),, 0LT of 0NU2, 0NU3 do the same process.

[0011] 当某个ONU中缓存数据为空时,上报的下一轮待发数据置为零,这样授权的窗口为零,0NU照样可以在下次上报的待发数据请求中申请授权窗口。 [0011] When a data requesting ONU outgoing data cache is empty, the next outgoing data reported to zero, so that the authorized window is zero, 0NU can still reported in the next window in the authorization request.

[0012] 如果0LT授权每个0NU在一次发送过程中发送完其所有缓存中的内容,则数据量大的那些ONU可能会独占整个带宽。 [0012] If 0LT authorize each 0NU finished sending all of its contents in a cache of the sending process, then those ONU large volumes of data may take over the entire bandwidth. 为避免这一点,OLT将限制最大发送量。 To avoid this, OLT will limit the maximum transmission amount. 每个0NU将被授权发送其前一周期请求的数据量,但不超过预定的最大限制,即最大发送窗口尺寸。 Each 0NU will be authorized to send data amount of the previous cycle request, but does not exceed a predetermined maximum limit, i.e., the maximum transmission window size. 对数据发送量最大限制的不同设定,将产生若干不同的方案。 Different settings for data transmission amount maximum limit, will produce a number of different schemes. 比如是固定的,基于服务水平协议(ServiceLevel Agreement,简称〃 SLA〃 ),这种方案忽略请求窗口大小而总是授予最大发送窗口;或者受限的,其授权请求字节数但不超过最大发送窗口;或者常量信用额度(Constant Credit),其在请求窗口之上加一常量信用额度;或者线性信用额度(Linear Credit),其在请求窗口之上加一与请求窗口成线性比例关系的信用额度;或者弹性的,其试图去除固定最大窗口的限制,唯一限制因素为最大周期时间。 Example, be fixed, based on the service level agreement (ServiceLevel Agreement, referred 〃 SLA〃), this approach ignores the request is always granted window size and the maximum transmission window; or limited, the number of bytes which the authorization request but does not exceed the maximum transmission window; or credit constants (constant credit), which was added over a constant credit request window; linear or credit limit (linear credit), which was added with a request for credit is linearly proportional to the window on the request window ; or elastic, which attempt to remove a fixed maximum limit of the window, the only limiting factor is the maximum cycle time.

[0013] IPACT的控制消息不是标准的AP0N或EP0N规定消息,其在数据流中插入转义码(Esc即e,简称"ESC")字符以标识后面为控制消息数据,后跟随ONU结点标识(Node Identifier,简称"NID")和请求授权窗口尺寸(Window Size,简称"WS〃 )。 [0014] 另外,在ITU-T G. 983. 4标准提出的DBA协议中,把来自ONU的业务分成几种类型的传输适配容器(Transmission Container,简称〃 T-C0NT"),本质上为承载异步传输模式(Asynchronous Transfer Mode,简称"ATM")的虚通路(Virtual Path,简称"VP") 或虚通道(Virtual Channel,简称〃 VC〃 )的〃 管道",具有不同服务质量(Quality of Service,简称〃 QoS〃 )要求的VP和VC到T-C0NT的复用为可编程的。每种T-C0NT类型有其特定的带宽分配要求。按照处理业务的优先级由高到低分为4类适配器,分别为T-C0NT1 、 T-C0NT2、 T-C0NT3和T-C0NT4, T-C0NT5可以对所有的业务适配,其目的是为了减少传 [0013] IPACT control message instead of the standard or EP0N AP0N predetermined message, an escape code is inserted (Esc i.e. E, referred to as "ESC") character in the data stream to identify control later data message, the node identification followed ONU (Node Identifier, referred to as "the NID") and request authorization window size (window size, referred to as "WS〃). [0014] Further, the DBA protocol ITU-T G. 983. 4 proposed standard, the traffic from the ONU several types of transmission adaptation into the container (transmission container, referred 〃 T-C0NT "), essentially a carry ATM (asynchronous transfer mode, referred to as" ATM ") virtual paths (virtual path, referred to as" VP ") or virtual channel (virtual channel, abbreviated 〃 VC〃) of 〃 pipeline ", having different QoS (quality of service, abbreviated 〃 QoS〃) required to VP and VC multiplexed T-C0NT programmable. each T-C0NT type has its specific bandwidth allocation requirements. adapter divided into four categories according to the priority from high to low processing services, respectively, T-C0NT1, T-C0NT2, T-C0NT3 and T-C0NT4, T-C0NT5 can for all the service adaptation, which aims to reduce the spread 输适配容器的数量。而带宽分配要求有四种类型:固定带宽,保证带宽,非保证带宽和尽力传输带宽。 The number of the input adapter container There are four types of bandwidth allocation requirements: a fixed bandwidth, assured bandwidth, non-assured bandwidth and best-effort transmission bandwidth.

[0015] 该DBA协议有三种策略:非状态上报(Non-Status-R印orting,简称〃 NSR〃 ),状态上报(Status-R印orting,简称〃 SR〃 )和混合类型。 [0015] The DBA protocol has three strategies: a non-reporting state (Non-Status-R print Orting, referred 〃 NSR〃), status reports (Status-R print Orting, referred 〃 SR〃) and mixing type. 对于NSR策略,0LT要进行业务监控;对于SR策略,0NU和光网络终端(0pticalNetwork Terminal,简称〃 0NT〃 )要发送状态报告给0LT ;对于混合策略,0LT既要进行业务监控,又要处理来自0NU/0NT的状态报告。 For NSR policy, to be 0LT service monitoring; strategies for SR, 0NU and optical network terminals (0pticalNetwork Terminal, referred 〃 0NT〃) to send status reports to the 0LT; strategy for mixing, it is necessary to conduct business 0LT monitor, but also the processing from 0NU state / 0NT report. [0016] SR策略中,ONU采集除T-C0NT1之外传输适配器的状态,通过物理层操作管理维护(Physical Layer Operation、Administ:ration、M£iinten£mce,简称〃 P1DAM〃 )信息帧上报给0LT。 [0016] SR strategy, in addition to a collection status of the ONU T-C0NT1 transport adapters, maintained through operation of the physical layer management (Physical Layer Operation, Administ: ration, M £ iinten £ mce, referred 〃 P1DAM〃) information reported to the frame 0LT. OLT根据上行PLOAM信息得出ONU中各容器的状态,根据算法分配确保带宽、未确保带宽和尽力传输带宽给各容器其中,带宽分配采用了各种调度方法来实现其公平性。 OLT according to the state of each ONU upstream PLOAM information derived container, according guaranteed bandwidth allocation algorithm is not guaranteed bandwidth and best-effort transmission bandwidth to each container wherein the bandwidth allocation scheduling using a variety of methods to achieve its fairness. 比如有无记忆、逐步递增、逐步增减等算法。 For example, the presence or absence of memory, gradually increasing and gradually increase or decrease algorithms.

[0017] 这些算法的带宽更新区别为,当检测到某T-C0NT有拥塞时,无记忆算法分配更多资源给该组,分配的资源与先前分配资源无关;逐步递增算法则在先前分配资源的基础上, 渐次增加更多资源分配给该组;逐步增减算法在先前分配资源的基础上,逐步减少其他组资源,以增加分配给该组的资源。 [0017] The difference update the bandwidth of these algorithms is, when detecting a T-C0NT congestion, the algorithm without memory allocated more resources to the group, regardless of the allocation of resources previously allocated resource; gradually increasing resources allocated in the previous algorithm basis, gradually adding more resources assigned to the group; gradually increase or decrease algorithms based on previously allocated resources, and gradually reduce other group resources to increase the resources allocated to the group.

[0018] 在实际应用中,上述方案存在以下问题:只能应用在单一性质的系统,不能根据不同策略区分处理不同类型的业务,无法满足多种业务类型的QoS需求,无法按照用户业务端口进行带宽分配,无法动态处理0NU离线的情况。 [0018] In practical applications, the above scheme has the following problems: the system can only be applied in a single nature, can not handle different types of traffic based on different policies to distinguish, can not meet the QoS requirements of multiple service types, according to the user service port can not be bandwidth allocation, not dynamic processing 0NU off-line.

[0019] 造成这种情况的一个主要原因在于,均没有对不同业务设置不同的分配策略;技术方案一中轮询周期是随着数据量自适应变化的,导致同一业务的数据发送不定时,不能满足时延均匀的实时性业务的需求;技术方案二中采取Round-Robin式固定顺序轮循,是专门针对面向连接的、协议数据单元(Protocol Data Unit,简称"PDU")定长的AP0N应用,而带宽更新机制针对的是T-CONT,不能按照不同端口进行带宽分配处理。 [0019] A main reason for this is that, did not set different policies for different service allocation; aspect is a polling period adaptively with the change of the amount of data, resulting in data transmission from time to time the same service, We can not meet the latency requirements uniform real-time services; technical solution taken in two fixing Round-Robin polling sequence is specifically for connection-oriented protocol data unit (protocol data unit, referred to as "PDU") fixed length AP0N application, while the bandwidth updating mechanism for the T-CONT, bandwidth allocation can not be processed in different ports. [0020] 发明内容 [0020] SUMMARY OF THE INVENTION

[0021] 本发明要解决的技术问题是提供一种无源光网络的动态带宽分配装置及方法,使得动态带宽分配方法实现业务透明,能适应不同类型业务需求,提高带宽利用率,实现带宽公平分配,健壮性好,实时性强,并且能对不同端口进行带宽分配,同时支持ONU的离线带宽释放。 [0021] The present invention is to solve the technical problem of providing a passive optical network, dynamic bandwidth allocation apparatus and method for dynamic bandwidth allocation method to achieve such a transparent service to adapt to different types of service requirements, improve bandwidth utilization, bandwidth fairly distribution, robustness good, real strong, and can allocate bandwidth to different ports, and support for offline bandwidth release ONU.

[0022] 为了解决上述技术问题,本发明实施例提供了一种无源光网络的动态带宽分配方法,包括: [0022] To solve the above problems, embodiments of the present invention provides a method of dynamic bandwidth allocation in a passive optical network, comprising:

[0023] 光线路终端0LT接收来自于光网络单元0NU的多个业务的带宽指配请求; Bandwidth [0023] 0LT optical line terminal receives a plurality of optical network units from a traffic 0NU assignment request;

[0024] 根据所述光网络单元的带宽指配请求中携带的上报信息,为所述光网络单元的所 [0024] The bandwidth of the optical network unit assignment reporting information carried in the request, the optical network unit to the

述业务进行授权; Said service authorization;

[0025] 根据授权的信息,对同一光网络单元下的业务统一生成授权消息; [0026] 将生成的所述授权消息发送给相应的光网络单元。 [0025] The authorization information for the same service when the optical network unit to generate unified authorization message; [0026] generated the authorization message sent to the corresponding optical network unit.

[0027] 本发明实施例还提供了一种无源光网络的动态带宽分配装置,包括:带宽授权单元,用于接收来自于光网络单元的多个业务的带宽指配请求;根据所述光网络单元的带宽指配请求中携带的上报信息,为所述光网络单元的所述业务进行授权; [0027] The present invention further provides a dynamic bandwidth allocation in a passive optical network device, comprising: a bandwidth grant means for receiving a bandwidth from a plurality of optical network units of the service assignment request; according to the optical the bandwidth refers to the network element with the reported information carried in the request, the service authorization to the optical network unit;

[0028] 授权消息生成单元,用于根据授权的信息,对同一光网络单元下的业务统一生成授权消息; [0028] authorization message generating means, based on the information for authorization, business under the same optical network unit Unified generate an authorization message;

[0029] 授权消息发送单元,将生成的所述授权消息发送给相应的光网络单元。 [0029] The message sending unit authorization, the authorization of the generated message to a respective optical network unit. [0030] 本发明实施例还提供了一种无源光网络系统,包括光线路终端0LT,所述0LT与多个光网络单元0NU进行通信;所述的0LT,用于接收来自于所述0NU的多个业务的带宽指配请求;根据所述带宽指配请求中携带的上报信息,为所述光网络单元的所述业务进行授权;根据所述授权的信息,对同一光网络单元下的业务统一生成授权消息;将生成的所述授权消息发送给相应的光网络单元。 [0030] Embodiments of the present invention further provides a passive optical network system includes an optical line terminal 0LT, said 0LT communicating with a plurality of optical network units 0NU; 0LT claim, for receiving from said 0NU a plurality of traffic bandwidth assignment request; means according to the bandwidth assignment request report information carried in the service authorization to the optical network unit; according to the information of the authorization of the same ONU unified messaging service generates the authorization; generated the authorization message sent to the corresponding optical network unit.

[0031] 通过实施本发明的实施例,可以带来较为明显的有益效果,即使得动态带宽分配对业务透明,能适应TDM/EF、 AF、 DF及MPCP消息的必须转发和CPU/0AM的确保转发等多种业务需求,提高带宽利用率,公平分配带宽,健壮性好,实时性强,更加有效利用带宽资源, 避免资源浪费。 [0031] By implementing embodiments of the present invention, it can bring more significant benefits, even though the business to obtain a transparent dynamic bandwidth allocation, to adapt to TDM / EF, AF, DF and MPCP message forwarding and must ensure CPU / 0AM of forwarding and other business needs, improve bandwidth utilization, fair allocation of bandwidth, good robustness, real-time, more efficient use of bandwidth resources and avoid waste of resources. [0032] 附图说明 [0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 图1是无源光网络结构示意图; [0033] FIG. 1 is a schematic structure of a passive optical network;

[0034] 图2是周期自适应交叉轮循方法的原理示意图; [0034] FIG. 2 is a simplified schematic cross-cycle adaptation of the round robin;

[0035] 图3是根据本发明的一个实施例的上行业务激活0NU Bitmap寄存器和相应的上行业务激活端口Bitmap表的结构图; [0035] FIG. 3 is a configuration diagram of the activation 0NU Bitmap register and corresponding Port Bitmap table uplink service activating uplink service according to an embodiment of the present invention;

[0036] 图4是根据本发明的一个实施例的上行vMAC上报信息表结构图; [0037] 图5是根据本发明的一个实施例的各类业务的授权方法流程图; [0038] 图6是根据本发明的一个实施例的上行vMAC授权信息表结构图; [0039] 图7是根据本发明的一个实施例的0NU状态信息表结构图; [0040] 图8是根据本发明的一个实施例的授权消息生成方法流程图; [0041] 图9是根据本发明的一个实施例的0NU激活超时计数表结构图; [0042] 图10是根据本发明的一个实施例的0NU信息老化方法流程图。 [0036] FIG. 4 is a table configuration diagram of the information reported by the uplink vMAC according to an embodiment of the present invention; [0037] FIG. 5 is a flowchart of various services of the authorization method according to one embodiment of the present invention; [0038] FIG. 6 is the authorization information table configuration diagram according to the uplink vMAC a present embodiment of the invention; and [0039] FIG. 7 is a 0NU status information table configuration diagram of an embodiment of the present invention; [0040] FIG. 8 is an embodiment of the present invention authorization message generating method according to the flow chart; [0041] FIG. 9 is a configuration diagram of the activation timeout count table 0NU according to one embodiment of the present invention; [0042] FIG. 10 is a flow 0NU information aging method according to an embodiment of the present invention, a Fig.

具体实施方式 Detailed ways

[0043] 为使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地详细描述。 [0043] To make the objectives, technical solutions, and advantages of the present invention will become apparent in conjunction with the accompanying drawings below of the present invention will be described in further detail.

[0044] 首先需要指出,在本发明所提出的无源光网络的动态带宽分配方法中,包含业务注册、带宽分配、授权消息、ONU信息老化。 [0044] First to be noted that, in the dynamic bandwidth allocation method for PON proposed by the present invention, comprises service registration, bandwidth allocation, the authorization message, the ONU information aging. 本发明将各种业务进行分类,并且对于不同类型的业务安排不同的数据结构实行不同分配策略。 The present invention will classify various services, and arranged for different data structures to implement different policies for allocating different types of traffic. 本发明还将同一ONU下的不同端口分别处理。 The present invention is also different ports of the same ONU are processed under. 另外,本发明还对ONU状态进行监控,动态释放离线ONU的资源。 Further, the present invention also monitor the status of the ONU, the ONU dynamically release the resource offline. 下面详细描述本发明的一个实施例。 The following detailed description of an embodiment of the present invention.

[0045] 为了将业务进行分类,对不同端口分别处理,需要设置各种类型业务的数据结构和端口的数据结构,以便系统进行分类处理。 [0045] In order to classify the traffic, were treated with different ports need to set various types of data structures and data structure of the service ports, so that the system for classification. 在本发明的一个实施例中,按照优先级将业务分为以下几类: In one embodiment of the present invention, according to the priority of business is divided into the following categories:

[0046] 快速转发业务,如时分复用(Time Division Multiplex,简称〃 TDM")、加速转发(E邓edited Forwarding,简称〃 EF")等,这里统称为EF业务,此类业务需要均匀延时的实时转发,而且带宽基本不受限制,因此优先级最高; [0046] The fast-forwarding services, such as time division multiplexing (Time Division Multiplex, referred 〃 TDM "), Expedited Forwarding (E Deng edited Forwarding, referred 〃 EF") and the like, collectively referred to herein as EF traffic, such operations require a uniform delay real-time forwarding and unlimited bandwidth is essential, therefore the highest priority;

[0047] 多点控制协议(Multi-Point Control Protocol,简称〃 MPCP")消息业务,MPCP 消息是用于系统正常MPCP通信的,分为自动发现MPCP消息和非自动发现MPCP消息,MPCP 消息的有关参数都是固定的,本发明还将根据0NU及时的MPCP消息判断是否其在线; [OO48] 确保转发(Must Forwarding,简称〃 MF 〃 )业务,如中央处理单元(CentralProcess Unit,简称"CPU")的消息、0AM的消息,此类业务需要保证消息正确传送,用于运行、管理、维护禾口预置模块(Operation Administration, Maintenance andProvisioning,简称〃 0AM&P〃 )及0LT与0NU间通讯,因此优先级也较高; [0047] MPCP (Multi-Point Control Protocol, referred 〃 MPCP ") message service, MPCP message is used for normal MPCP communication system is divided into a non-automatic discovery MPCP message and automatic discovery MPCP message, the message about the MPCP parameters are fixed, the present invention also determines whether or not online according to its timely 0NU MPCP message; [OO48] Assured forwarding (Must forwarding, referred 〃 〃 MF) services, such as a central processing unit (CentralProcess unit, referred to as "CPU") news, 0AM news, such services need to ensure that the right message is transmitted, for operation, management and maintenance of Hekou preset modules (operation Administration, maintenance andProvisioning, referred 〃 0 AM&P〃) and 0LT with 0NU between communication, and therefore priority also higher;

[0049] 可靠转发业务,即可靠转发(Assured Forwarding,简称〃 AF〃 ),此类业务需要 [0049] reliable forwarding business, that is reliable forwarding (Assured Forwarding, referred 〃 AF〃), this kind of business needs

保证指定的最低带宽,但对实时性要求不高; Guarantee the minimum specified bandwidth, but for less demanding real-;

[0050] 尽力转发业务,如缺省转发(Default Forwarding,简称〃 DF〃 ),此类没有最低带宽要求,所以优先级最低。 [0050] effort forwarding business, such as the default forwarding (Default Forwarding, referred 〃 DF〃), there is no such minimum bandwidth requirements, so the lowest priority.

[0051] 本发明采用集中控制上报信息的方式,0LT对每个0NU的状态进行管理。 [0051] The present invention reports the information is centrally controlled manner, 0LT manage the state of each 0NU. 在本发明的一个较佳实施例中,0NU的自动发现和注册过程的消息交互采用,国际电气电子工程师协会IEEE802. 3ah标准的消息交互过程。 Message embodiment, the automatic discovery and registration process 0NU In one preferred embodiment of the present invention using interaction, Institute of Electrical and Electronics Engineers IEEE802. 3ah standard message interaction process.

[0052] 为了在进行数据发送授权时便于分业务、分优先级地轮循,在本发明的一个较佳实施例中,设置各种业务的上行业务激活ONU位映射(Bitm即)寄存器来保存各种业务的0NU激活信息,比如上行MPCP激活0NU Bitmap寄存器(Ingress MPCP Active Bitmap,简称〃 I廳〃 )、上行MF业务激活0NU Bitmap寄存器(Ingress Must Forwarding Active Bitmap,简称〃 MFAB 〃 )、上行EF业务激活ONU Bitm即寄存器(Ingress Expedited Forwarding ActiveBitmap,简称〃 IEFAB 〃 )、上行AF业务激活ONU Bitmap寄存器(IngressAssured Forwarding Active Bitmap,简称〃 IAFAB 〃 )、上行DF业务激活0NUBitmap寄存器(Ingress Default Forwarding Active Bitmap,简称〃 IDFAB 〃 ); 同时以端口为单位的业务有EF、AF、 DF等,这些业务还需设置上行业务激活端口位映射(Bitmap)表来保存这些业务在端口的激活信息,比如上行EF业务激活Bitmap表(Ingress Expedited For [0052] In order to facilitate the sub-service data during the transmission authorization prioritized round-robin manner, in a preferred embodiment of the present invention, various services provided uplink traffic ONU activation bitmap (Bitm i.e.) to hold register 0NU activation information of various services, such as activating an uplink MPCP 0NU Bitmap register (Ingress MPCP Active Bitmap, referred hall 〃 〃 I), the uplink MF service activation 0NU Bitmap register (Ingress Must Forwarding Active Bitmap, referred 〃 〃 MFAB), an uplink EF service activation ONU Bitm i.e. register (Ingress Expedited Forwarding ActiveBitmap, referred 〃 IEFAB 〃), uplink AF service activation ONU Bitmap register (IngressAssured Forwarding Active Bitmap, referred 〃 IAFAB 〃), uplink DF service activation 0NUBitmap register (Ingress Default Forwarding Active Bitmap, Acronym 〃 〃 IDFAB); while port business units have EF, AF, DF, etc., these operations need to set up service activation port bitmap (Bitmap) tables to store activation information in the service port, such as an uplink EF service activate Bitmap table (Ingress Expedited For warding Active Bitmap Table,简称〃 IEFABT〃 )、上行DF业务激活Bitmap 表(Ingress Assured ForwardingActive Bitmap Table,简称〃 IAFABT〃 )、上行AF业务激活Bitmap表(IngressDefault Forwarding Active Bitmap Table,简称〃 IDFABT〃 )。 warding Active Bitmap Table, abbreviated 〃 IEFABT〃), DF uplink service activation Bitmap table (Ingress Assured ForwardingActive Bitmap Table, abbreviated 〃 IAFABT〃), AF uplink service activation Bitmap table (IngressDefault Forwarding Active Bitmap Table, abbreviated 〃 IDFABT〃). [0053] 如图3所示,上行业务激活ONU Bitm即寄存器包含N个ONU的相应的位(bit), 用于指示该ONU的此类业务是否被激活,比如1表示激活、0表示未激活;图中右侧的上行业务激活端口Bitmap表包含N个ONU的相应的表项,每个表项的内容(content)存储着相应的ONU所下挂的各个端口的此类业务是否被激活的信息,比如是每个端口对应着一位,1 表示激活、0表示未激活,而系统将这些表存放在存储器中,且可以根据相应的光纤网络单元标识符(Optical Network Unit Identifier,简称〃 ONUID")来索引(index)相应的ONU的表项,以方便读写端口业务激活信息。 [0053] As shown, the uplink service activation ONU Bitm i.e. registers comprises N bits corresponding to the ONU 3 ( 'bit), indicating whether the ONU is activated such services, such as 1 indicates active, 0 inactive ; uplink service activating the right side in FIG port Bitmap table contains entries corresponding ONU of N, the content (content) are stored for each entry whether or not such operations corresponding to respective ports of the ONU is activated under linked information, such as one corresponding to each port, 1 indicates active, 0 inactive, and these tables will be stored in memory, and may be (optical network unit identifier, referred 〃 ONUID according to the respective optical network unit identifiers ") to the index (index) entry corresponding to the ONU, to facilitate service activation information read and write ports.

[0054] 需要说明的是,在业务注册过程中,为ONU分配的逻辑链路标识符(Logical Link Identifier,简称〃 LLID 〃 )为{ONUID,端口激活Bitm即l的形式,这种形式便于使用ONUID和各端口偏移(Offset)进行各种业务激活信息、带宽分配信息表的检索,也便于组播业务的开展。 [0054] Incidentally, in the service registration process, the ONU is allocated to the logical link identifier (Logical Link Identifier, LLID referred 〃 〃) as {ONUID, i.e. port activation Bitm form of l, easy to use this form each port ONUID and offset (offset) and various service activation information, bandwidth allocation information table retrieval, and facilitating the multicast service.

[0055] ONU在注册过程中其MPCP端口即被激活,激活信息加入IMAB中;ONU注册后则MF 端口激活,激活信息加入頂FAB中,这里每个ONU缺省都有CPU和0AM的业务。 [0055] In the registration process which ONU MPCP port is activated, the activation information is added IMAB; MF port is activated after the ONU registration, activation information is added in the top FAB, where each ONU has a CPU and 0AM default service. [0056] ONU注册成功后向OLT的CPU请求带宽指配,网管通过与OLT的CPU的交互进行带宽信息的传递。 [0056] ONU to the OLT after successful registration request assignment of CPU bandwidth, network bandwidth information passed by interacting with the OLT CPU. 带宽信息包含EF业务端口的激活,AF及DF业务端口的激活及该端口的带宽。 Bandwidth information comprises activation of EF service port, and activation of AF and DF service port bandwidth of the port. EF、AF及DF业务端口的激活信息分别加入IEFAB、 IAFAB、 IDFAB中和IEFABT、 IAFABT、 IDFABT的相应表项中,IEFAB、 IAFAB、 IDFAB的相应位分别反映该ONU是否有EF、 DF、 AF业务激活的信息,IEFABT、 IAFABT、 IDFABT的相应表项则标识出该ONU的那些端口的EF、 DF、 EF, AF and activation information DF services ports are added IEFAB, IAFAB, IDFAB and IEFABT, IAFABT, IDFABT respective entry, IEFAB, IAFAB, the corresponding bit IDFAB respectively reflect whether the ONU has EF, DF, AF service activation information, the corresponding table entry IEFABT, IAFABT, IDFABT is identifying those EF port of the ONU, DF,

8AF业务被激活。 8AF service is activated.

[0057] 对于需要进行带宽控制的业务端口,设置相应的带宽信息表 [0057] The need for bandwidth control service ports, set the bandwidth information table

(Bandwidthlnformation Table,简称"BIT"),用于存放每个固定轮询周期(即虚拟帧周 (Bandwidthlnformation Table, referred to as "BIT"), for storing each fixed polling cycle (i.e., the virtual frame circumference

期)内发送的数据量,称为发送量子(Transmit Quantum),其单位可以是字节(Byte)、字 S) the amount of data transmitted, transmission is called quantum (Transmit Quantum), which may be a unit byte (Byte), word

(Word)等。 (Word) and so on. 同样的系统根据ONUID和各端口偏移(Offset)进行表项检索。 The same table entry retrieval system according to ONUID and each port offset (Offset).

[0058] OLT通过与网管的交互,可以动态操作修改上行业务激活0NU Bitmap寄存器相关 [0058] OLT through interaction with the network may be dynamically modify the operation of uplink traffic related activation 0NU Bitmap register

位、激活端口Bitmap表相关表项及带宽信息表相关表项的内容,从而实现了ONU业务端口 Position, activate the relevant Port Bitmap table entries and content-related information table entries bandwidth, enabling ONU service port

的动态插入删除和带宽信息的重配置。 Dynamic insertion and deletion reconfiguration of bandwidth information.

[0059] 每个轮询周期中,0NU通过IEEE802. 3ah标准的REPORT消息向OLT上报待发数据长度,每个消息包含有8个队列数据长度上报项,并预定各个队列和ONU端口间对应关系, 使得OLT能够区分上报长度来自哪个端口。 [0059] each polling cycle, 0NU by IEEE802. 3ah standard reports REPORT message to the OLT outgoing data length, each message containing a data queue length report eight items, and the predetermined queue among the various ports and the corresponding relationship ONU , so that OLT can distinguish from which port the reported length. 同时设定各个队列的有效标志,比如划分8个比特对应的标志8个队列是否有效项、或者将无效队列长度置为零以标志该项无效。 While setting the valid flag of each queue, for example dividing eight bits corresponding to the eight queues flag is valid entries, the queue length or the invalid flag is set to zero to the invalid. 当ONU 下挂端口大于8个时,采用多个REPORT消息表征,消息中附带序号,以标识一个周期中多个REPORT的连续性,使得OLT可以根据接收到的多个消息确定各上报项来自哪个端口。 When linked to the ONU port is greater than eight, using a plurality of characterization REPORT message, and the message sequence number included to identify a plurality of REPORT continuity period, the OLT may determine that each of the items from the report according to which a plurality of received message port. [0060] 为了对各个端口的上报信息进行分别处理,OLT将上报待发数据长度信息存储于以虚拟MAC(Virtual MAC,简称〃 vMAC 〃 )分类的上行vMAC上报信息表(R印ort Information Table,简称"RIT")中,图4示出了该表的结构:各个表项相应于各个ONU 端口的上报信息,并且系统由ONUID索引;对于普通业务,如OAM、 CPU及通常的转发业务等数据,表项包含上报标识(R印orted Flag)、上报待发数据长度(R印ort),其中〃 上报标识〃 标志当前虚拟帧周期内该vMAC是否上报待发数据, 〃 上报待发数据长度〃 的数字单位与带宽信息表中发送量子的单位保持一致;对于MPCP消息业务,表项包含上报标识(R印orted Flag)、上行MPCP消息类型域(Type)、保留域(Reserved),其中上行MPCP消息类型域指明该上行MPCP消息的类型,如"REGISTER REQ" 、 〃 REGISTER ACK〃和"Normal REPORT"等,使得OLT能区分ONU所在注册 [0060] In order to report information of the respective ports can be dealt with separately, OLT reports the outgoing data length information is stored in the virtual MAC (Virtual MAC, referred 〃 〃 vMAC) Sort vMAC uplink reporting information table (R printed ort Information Table, referred to as "RIT") in FIG. 4 shows the structure of this table: the respective entries corresponding to the report information of each ONU port, and the system by the ONUID index; for ordinary traffic, such as OAM, CPU and the usual forwarding service data such as , reports the identification table entry contains (R printed orted flag), reports the outgoing data length (R printed ORT), which reports the identification 〃 〃 flag in the current virtual frame period of the outgoing data vMAC whether to report, reports the outgoing data length 〃 〃 the number of units of bandwidth information table unit transmission quanta consistent; for MPCP message service, the entry contains reports identification (R printed orted Flag), uplink MPCP message type field (the type), reserved field (reserved), wherein the uplink MPCP message type field indicates the type of the uplink MPCP message, such as "REGISTER REQ", 〃 REGISTER ACK〃 and "Normal REPORT" and so on, so that the OLT can distinguish where it is registered ONU 段以便明确应当生成的下行MPCP消息类型。 It should be clear section to generate a downlink MPCP message type. 由于EF业务在确定了虚拟帧周期后,端口在一个虚拟帧周期内可发送的数据长度是一定的,因此无须进行待发数据长度上报。 Since EF traffic data length after the virtual frame period is determined, a virtual port within a frame period can be transmitted is constant, there is no need for the length of the outgoing data reporting.

[0061] 带宽分配,即业务数据发送授权,是OLT根据业务ONU端口激活信息、带宽分配信息、上报信息等按照业务优先级轮询授权的过程。 [0061] Bandwidth allocation, namely authorization service data transmission, ONU port is activated OLT according to the service information, bandwidth allocation information and report information in accordance with the authorization service priority polling process. 为了满足EF业务的QoS保证,授权的周期为虚拟帧周期,其他的带宽分配操作均按照虚拟帧周期进行。 In order to meet the EF service QoS guarantee, the authorized period is a virtual frame period, other bandwidth allocation operations are carried out in accordance with the virtual frame period. 下面参照图5详细说明本发明的一个实施例的上行业务数据发送授权方法。 Figure 5 a detailed description of the present invention, uplink traffic embodiment described below with reference data transmission authorization.

[0062] 本发明按照业务优先级从高到低分别是EF业务、自动发现MPCP、非自动发现MPCP、 MF业务、AF业务、DF业务的顺序轮询授权。 [0062] The present invention according to the traffic priority is high to low EF service, the MPCP automatic discovery, non-automatic discovery MPCP, MF service, the AF service, the polling sequence of DF service authorization.

[0063] 为了方便OLT对各类上行业务发送授权消息,本发明设置上行vMAC授权信息表(Grant Information Table,简称GIT),用于存储业务发送授权产生的授权信息,当在上行接收过程中,OLT读取授权信息表中的数据,并产生授权消息,发送至相应ONU,完成带宽动态分配过程。 [0063] In order to facilitate all types of uplink traffic to the OLT sends an authorization message, the present invention is disposed upstream vMAC authorization information table (Grant Information Table, referred to the GIT), for storing the generated traffic transmission authorization authorization information, when the uplink reception, OLT reads the data in the authorization information table, and generates a grant message sent to the corresponding the ONU, dynamic bandwidth allocation process is completed.

[0064] 图5示出了各类业务的授权方法流程。 [0064] FIG. 5 shows the authorization process flow of various services.

[0065] 在步骤501中,根据上行业务激活信息确定当前授权端口,或者根据启动计数器启动自动发现MPCP消息。 [0065] In step 501, the activation service information is determined according to the uplink port the current authorization, the automatic discovery MPCP message or start according to the start counter. 对于EF、MF、AF、DF及非自动发现MPCP等业务,所述上行业务激活信息包含各类业务的上行业务激活0NUBitm即寄存器和上行业务激活端口Bitmap表, 轮询这些信息得到当前需要操作的该类业务端口。 For EF, MF, AF, DF and non-automatic discovery MPCP service, etc., the uplink traffic information includes various types of activation service activation 0NUBitm i.e. uplink traffic and uplink traffic activate the port registers Bitmap Table, such polling operation currently required to obtain the information This class service port. 对于自动发现MPCP,为了动态注册新上线的ONU,设定一个自动发现MPCP的启动计数器,每次计满则启动,实现周期启动自动发现MPCP过程并不占用过多带宽。 For automatic discovery MPCP, for dynamic new on-line ONU registration, set a start auto-discovery MPCP counter is started each time the meter is full to achieve the cycle start auto-discovery MPCP process does not take up too much bandwidth.

[0066] 接着进入步骤502,在带宽资源允许的情况下进行授权,记录授权窗口信息或者下行MPCP类型。 [0066] then proceeds to step 502, in the case where the authorized bandwidth allowed, the window information recording authorization or downlink MPCP type. 带宽资源是否允许的判断是根据端口指配带宽,即一个虚拟帧周期内允许发送的数据量,或者MPCP的固定数据量,以及当前虚拟帧周期内剩余带宽来判断,前者大于后者时,带宽资源允许,可以进行授权;或者对于AF业务,只有当端口有待发数据上报,并且上报的待发数据量不大于剩余可发送数据量也不大于该端口带宽指配发送数据量与亏欠量的和,才判断为带宽资源允许;或者对于DF业务,只有当端口有待发数据上报并且剩余可发送数据量不小于上报数据量和带宽指配最大可发送数据量两者中最大者,才判断为带宽资源允许。 Bandwidth determination is based on whether to allow the port assigned bandwidth, i.e., allows the amount of data sent in a virtual frame period, a fixed amount of data or the MPCP, the current virtual frame period and the remaining bandwidth is determined, when the former is greater than the latter, bandwidth, resources permit, may be authorized; or for the AF service, only when the amount of outgoing data port send data to be reported, and the remaining amount of transmission may be reported data is not greater than nor greater than the port bandwidth assigned to the transmission data amount and the amount owed , it is determined that the bandwidth resources permit; or for DF service, only when the data reporting the port to be sent and the remaining data amount not less than the transmittable amount of data and bandwidth report refers to both the maximum amount with the maximum of transmission data, it is determined that the bandwidth resources permit.

[0067] 其中,对于EF业务,根据预定数据到达时间戳、与本虚拟帧周期内的前一端口属于不同ONU时需要加入的保护带,确定其数据发送起始时间(Start Time)和数据发送长度(Length),并记录到该类业务的GIT的该端口的相应表项中。 [0067] wherein, for EF traffic, according to a predetermined arrival time stamp data needs to be added when the protective tape belonging to a different ONU ports preceding the present virtual frame period and determines that the data transmission start time (Start Time) data transmission and the corresponding entry length (length), and recorded to the class of service of the port in the GIT. 其中所述预定数据到达时间戳是指预先确定的下一上行虚拟帧周期内数据到达时间标识,该时间标识的参考标准为OLT处的自由振荡时钟。 Wherein said arrival time stamp refers to the predetermined data within a predetermined period of the next uplink virtual frame data arrival time stamp, the time stamp of the reference standard for the free-running clock at the OLT.

[0068] 对于MPCP消息业务,根据当前MPCP端口的RIT上行消息类型确定下行MPCP消息类型,自动发现MPCP为固定类型,并将所述MPCP类型和授权标志写入MPCP端口相应GIT 表项中。 [0068] For the MPCP message service, an uplink message type of current MPCP port RIT is determined according to the downlink MPCP message type, automatic discovery MPCP fixed type, and the MPCP type and write authorization token corresponding MPCP port in the GIT table item.

[0069] 对于MF、DF业务,根据端口RIT中上报数据长度信息、已有授权亏欠量对其授权对应长度窗口,并写入相应GIT表项中。 [0069] For the MF, DF service, according to the data length information in the reporting port RIT, authorization has been authorized amount owed to its length corresponding to the window, and write the corresponding GIT table item.

[0070] 对于AF业务,根据端口RIT中上报数据长度信息和已有授权亏欠量对其授权对应长度窗口,同时计算新的授权亏欠量,并写入相应GIT表项中。 [0070] For AF service, according to the port in the RIT data length information and reports the amount owed to its existing authorization authorization corresponding to the length of the window, and calculating a new authorized amount owed, and write the corresponding GIT table item.

[0071] 接着进入步骤503,更新相关信息。 [0071] Step 503 then proceeds to update the information. 更新相关信息的操作包含,更新当前虚拟帧周期内剩余带宽,更新EF业务中当前预定数据到达时间戳及虚拟帧周期内剩余带宽,清零自动发现MPCP的启动计数器,清除MF、AF、DF中对应RIT表中上报标志等,其中清除RIT表中的上报标志是为了避免下一虚拟帧周期不发生重复授权。 Related operations include update information, updates residual bandwidth in the current virtual frame period, EF traffic update data reaches the predetermined current timestamp and the remaining bandwidth virtual frame period, clears the counter to start automatic discovery MPCP clear MF, AF, DF in report flag corresponding to RIT table, etc., which clears report flag RIT table is to avoid repeating authorization in the next virtual frame period does not occur.

[0072] 在本发明的一个较佳实施例中,AF业务的授权调度方法采用漏桶型算法。 [0072] In a preferred embodiment of the present invention, the authorization service scheduling method AF type using the leaky bucket algorithm. 熟悉本领域的技术人员可以理解,AF业务的授权调度也可以采用加权轮询算法,而不影响本发明的实质和范围。 Those skilled in the art will appreciate, AF service grant scheduling WRR algorithm may also be used without affecting the spirit and scope of the invention.

[0073] 接着进入步骤504,判断是否有端口未授权,如果有,进入步骤501 ,否则结束本来业务端口的授权,进入下一优先级业务端口的授权。 [0073] then proceeds to step 504, it is determined whether there is an unauthorized port, if so, proceeds to step 501, otherwise would have been the end of the authorization service port, the port enters the next priority service authorization. 其中,自动发现MPCP每周期最多只有一次授权,所以直接进入下一优先级业务端口的授权。 Wherein the automatic discovery MPCP only once a week for a maximum of authorization, the authorization directly to the next priority service port.

[0074] 图6示出了上行vMAC授权信息表的数据结构,各个表项相应于各个ONU端口的授权信息,并且系统由ONUID索引;对于上行EF业务,表项包含授权标志(Granted Flag)、 数据发送起始时间(StartTime)、数据发送长度(Length),其中授权标志指示该业务端口是否被授权,数据发送起始时间即该端口被授权可以开始发送的时间,数据发送长度即该端口被授权可以发送数据的长度;对于上行MF业务,表项包含授权标志(Granted Flag)、预留域(Reserved)、数据发送长度(Length),预留域即尚未定义的部分;对于MPCP端口, 表项包含授权标志(Granted Flag)、下行MPCP消息类型(Type)、预留域(Reserved),其中下行MPCP消息类型包含〃 DiscoveryGATE" 、 〃 Normal GATE" 、 〃 REGISTER&GATE〃 , 这里"GATE"类型的下行MPCP专门用于承载授权消息;对于其他业务,表项包含授权标志(GrantedFlag)、亏欠计 [0074] FIG. 6 illustrates an uplink vMAC authorization data structure information table, each table entry corresponding to the authorization information of each ONU port, and the system by the ONUID index; for the uplink EF service, the table item contains the authorization token (Granted Flag), data transmission start time (the StartTime), the length of the data transmission (the length), wherein the service authorization flag indicating whether the port is authorized, that is, the start time of the data transmission port is authorized to transmit the start time, i.e. the length of the data transmission port is authorization may transmit data length; for upstream MF service, the table item contains the authorization token (Granted flag), reserved field (Reserved), the length of the data transmission (the length), i.e. part of the reserved field is not defined; for MPCP port table item contains authorization flag (Granted flag), downlink MPCP message type (the type), reserved field (Reserved), wherein the downlink MPCP message type comprising 〃 DiscoveryGATE ", 〃 Normal GATE", 〃 REGISTER & GATE〃, where "GATE" type downlink MPCP message dedicated bearer authorization; for other services, the authorization token contains entries (GrantedFlag), owe meter 器(Deficit Cnt)、数据发送长度(Length),其中亏欠计数器用于记录该端口的授权亏欠量,授权亏欠量反映该业务端口在以前的上行业务周期中累计的授权带宽多于上报带宽的程度,系统通过授权亏欠量来平衡AF、 DF业务的QoS保证。 Is (Deficit Cnt), the length of the data transmission (the Length), wherein the amount owed authorization deficit counter for recording the port, authorizing the amount owed reflect the extent of the authorization service port bandwidth is greater than the cumulative reported in the previous cycle of bandwidth in uplink traffic the system is balanced by authorized amount owed AF, QoS DF service guarantee. 在业务数据发送授权阶段,只对EF业务授权数据发送起始时间,其他业务中自动发现MPCP的注册窗口对ONU数目及最长扩展距离确定的PON系统来说也是确定的,非自动发现MPCP由于MPCP消息长度是固定的故其授权长度也是固定的,它们的授权长度不再写入授权信息表, AF和DF业务端口的授权长度由于不固定要写入授权信息表。 Service data transmission authorization stage, only the transmission start time of the EF service authorization data, other services in the auto-discovery MPCP ONU registration window and the number of maximum extension determined from the PON system is also determined, since the non-automatic discovery MPCP MPCP message length is constant so the authorized length is fixed, the length thereof is no longer authorized to write the authorization information table, the length of the authorization AF and DF service port is not fixed because the authorization information table to be written.

[0075] 为了便于管理ONU,本发明还设置了ONU状态信息表(Statuslnformation Table, 简称"SIT"),用于表征ONU的状态信息。 [0075] In order to manage ONU, the present invention is also provided ONU status information table (Statuslnformation Table, referred to as the "SIT"), it is used to characterize the ONU status information. ONU状态信息表是在MPCP消息交互过程中生成的,ONU所处状态根据当前OLT与ONU间所交互的消息类型确定。 ONU status information table is generated in the MPCP message exchange process, the state in which ONU is determined according to the current between the OLT and the ONU interacted message type. 图7示出了状态信息表的数据结构,每个ONU对应一个表项,系统由ONUID索引,表项包含ONU状态信息(ONUStatus)。 FIG 7 shows a data structure of the state information table, each ONU corresponds to one table entry, the system ONUID index, the table entry contains ONU status information (ONUStatus). 在本发明的一个较佳实施例中,用2个比特表示ONU状态信息,分别是无效(Invalid Entry)、已注册(Registered 0NU)、注册中(RegisteringONU),其中无效表示该ONUID未分配给任何0NU,已注册表示该ONU已完成注册过程可以正常进行业务数据转发, 注册中表示该ONU正处在注册过程中,注册中的ONU的具体当前交互消息可通过该ONU的MPCP端口上报信息表(RIT)表项和授权信息表(GIT)表项得知。 In a preferred embodiment of the present invention, represented by two bits ONU status information are invalid (Invalid Entry), Registered (Registered 0NU), registration (RegisteringONU), which represents the valid not assigned to any ONUID 0NU, indicating that the ONU has been registered to complete the registration process can be a normal business data forwarding, registration indicates that the ONU is in the registration process, specifically the current interactive messages can be registered in the ONU MPCP port of ONU through the report information table ( RIT) entry and authorization information table (GIT) entry that.

[0076] 在完成业务发送授权操作以后,OLT将在虚拟帧周期中生成授权消息并在一定的 [0076] After completion of the service authorized to operate the transmission, OLT will generate an authorization message in a virtual frame period and certain

时刻发送授权消息至相应0NU。 Sending an authorization message to the corresponding time 0NU. 授权消息生成的原则是:为了对每个ONU的端口业务生成 Principles authorization message is generated: In order to generate business for each ONU port

尽量少的授权消息,同时也是为了在上行数据流中少插入ONU间保护带及同步时间段,除 Minimize grant message, but also to small guard band is inserted between the ONU and the sync time slots in the uplink data stream, except

了EF外其他端口业务的授权发送窗口是前后紧邻的,所以除EF外的其他端口的授权数据 The other ports outside the EF service is authorized to send window immediately before and after, so the license data from other ports except the EF

发送起始时间是在授权消息生成阶段确定并写入授权消息中的。 Transmission start time is determined in the authorization message generator stage and written authorization message.

[0077] 图8示出了根据本发明的一个实施例的授权消息生成方法的流程。 [0077] FIG. 8 illustrates a flow authorization message generating method in accordance with one embodiment of the present invention.

[0078] 如图所示,在步骤801中,逐个读取ONU状态信息表表项。 [0078] As shown, in step 801, read one by one ONU status information table entry. 系统以ONU为单位进行 ONU system as a unit

授权消息生成,使得授权消息在类型为"GATE"的下行MPCP消息中承载,并且可以处理同 Generating a grant message, such that the authorization message is carried in downlink MPCP message type "GATE", the same process and may

一ONU的业务端口的统一授权。 Unified licensing business a port of the ONU.

[0079] 接着进入步骤802,判断当前ONU是否无效,如果是,进入步骤801,否则进入步骤803。 [0079] then proceeds to step 802, it is determined whether the current ONU is invalid, if yes, proceeds to step 801, otherwise proceeds to step 803. 如果当前ONUID对应的ONU状态信息为无效,则不进行授权,继续往下读取状态信息表。 If the current ONU status is invalid information corresponding ONUID, not authorized to continue reading the status information table down.

[0080] 在步骤803中,读取该ONU各端口对应的GIT表项。 [0080] In step 803, the read port corresponding to each ONU GIT entries. 授权信息在授权过程中存储于授权信息表中,读取各端口对应的表项可以获取该端口授权信息。 Authorization information stored in the authorization process in the authorization information table, reading corresponding to each port entry port can obtain the authorization information. 此后进入步骤804。 Since then proceeds to step 804. [0081] 在步骤804中,根据授权信息生成下行MPCP消息。 [0081] In step 804, the authorization information is generated according to a downlink MPCP message. 系统将授权消息通过下行MPCP 消息承载,首先根据ONU所处状态及授权的MPCP消息类型确定下行MPCP消息类型,然后根据各vMAC端口授权情况和由业务数据发送授权阶段继承来的已授权预定数据发送时间戳,来确定各vMAC端口的授权数据发送起始时间,并把授权相关信息写入生成的下行MPCP 消息中。 The message authorization system through a downlink MPCP message-bearing, first downlink MPCP message type to determine which ONU status and authorized MPCP message type according to, and inheritance in accordance with various ports vMAC authorization and traffic data sent by the grant phase to the predetermined data transmission authorized timestamp determined vMAC authorization data for each port transmitting start time, and the authorization information is written in downlink MPCP message generation. [0082] 接着进入步骤805,清除该GIT表项授权标志,以避免授权信息重复生成。 [0082] then proceeds to step 805, clears the GIT entries authorization flag, in order to avoid repeatedly generating authorization information. [0083] 接着进入步骤806,判断是否已读完所有状态信息表表项,如果是,则表明已完成所有0NU授权消息的生成,结束本虚拟帧周期的授权消息生成过程,否则返回步骤81继续读取状态信息表。 [0083] then proceeds to step 806, judging whether all the status information has been read table entry, and if so, then you have completed all 0NU generated authorization message, the authorization message generation process ends the present virtual frame period, otherwise, returns to step 81 to continue read status information table.

[0084] 最后,本发明给出了处理离线0NU或者故障0NU的方法,即ONU信息老化过程。 [0084] Finally, the present invention gives a method of treating or offline 0NU 0NU fault, i.e., the ONU information aging procedure. 系统设置ONU激活超时计数表,给每个ONU的不响应时间进行计数,如果计数值超过规定的离线阈值,则判定该ONU已无效,释放无效ONU的资源。 System Setup table ONU activation timeout count, a response time of each ONU is not counted, the offline threshold, if the count value exceeds a predetermined, it is determined that the ONU is invalid, an invalid ONU release resources.

[0085] 图9示出了ONU激活超时计数表的数据结构,每个ONU对应一个表项,系统由ONUID索引,表项包含上报标志(R印orted)、激活超时计数器(Active Timeout Count,简称〃 ATC")。 [0085] FIG. 9 illustrates ONU activation timeout count table data structure, each ONU corresponds to one table entry, the system ONUID index, the table entry contains a report flag (R printed orted), activation timeout counter (Active Timeout Count, Acronym 〃 ATC ").

[0086] 图10示出了根据本发明的一个实施例的OUN信息老化方法流程, [0087] 如图所示,在步骤101中,逐个读取ONU状态信息表表项。 [0086] FIG. 10 shows a flow OUN information aging method according to an embodiment of the present invention, [0087] As shown, in step 101, read one by one ONU status information table entry. 系统根据ONUID索引。 The system according to ONUID index. [0088] 接着进入步骤102,判断当前ONU是否有效,如果是,则进入步骤103,否则,返回步骤101,对无效ONU不予处理,继续往下读取。 [0088] then proceeds to step 102, it is determined whether the currently valid ONU, if yes, the process proceeds to step 103, otherwise, returns to step 101, processing of invalid ONU will not continue to read down.

[0089] 在步骤103中,读取该ONU对应的激活超时计数表表项,用于判断该ONU是否离线,此后进入步骤104。 [0089] In step 103, reads the corresponding ONU activation timeout counter table entry, for determining whether the ONU is offline, then proceeds to step 104.

[0090] 在步骤104中,根据是否上报MPCP消息,对激活超时计数器进行清零或计数操作, 并清除上报标志。 [0090] In step 104, depending on whether MPCP message is reported, activation timeout count operation or the counter is cleared, and clear the report flag. 系统根据该ONU在本虚拟帧周期内是否上报MPCP消息对激活超时计数器操作,如果是,则清零,否则计数。 The system according to MPCP message reporting whether the ONU in the present virtual frame period of the activation timeout counter operation, if it is, clear, otherwise count.

[0091] 接着进入步骤105,判断激活超时计数器是否超过离线阈值,如果是,表明该0NU 已离线,进入步骤106 ;否则,表明该ONU在线,进入步骤107。 [0091] then proceeds to step 105, it is determined whether the timeout counter exceeds the activation threshold is offline, and if so, indicating that offline 0NU proceeds to step 106; otherwise, indicating that the online ONU proceeds to step 107.

[0092] 在步骤106中,置该ONU对应的ONU状态信息表表项为无效状态,并释放该ONU的相关资源,此后进入步骤107。 [0092] In step 106, the ONU set ONU status information table entry corresponding to the inactive state, and releases resources of the ONU, then proceeds to step 107. 对于离线0NU,系统在状态信息表设置无效,标志该ONU不存在。 For offline 0NU, system status information table provided in the void, the ONU flag does not exist. 该ONU的相关资源包含:上行业务激活Bitm即寄存器頂PAB、 MFAB、 IEFAB、 IAFAB、 IDFAB的相应位,上行业务激活Bitmap表IEFAT、 IAFAT、 IDFAT的相应表项,带宽信息表的相应表项,以及原先分配给该ONU的ONUID 。 The ONU resources comprising: an uplink service activation Bitm i.e. registers top PAB, MFAB, IEFAB, IAFAB, the corresponding bit IDFAB of uplink service activating the corresponding entry Bitmap table IEFAT, IAFAT, IDFAT, the bandwidth corresponding entries table, and ONUID originally assigned to the ONU.

[0093] 在步骤107中,判断是否已读完所有状态信息表表项,如果是,则结束本虚拟帧周期的ONU信息老化过程,否则返回步骤101继续读取状态信息表。 [0093] In step 107, it is determined whether all the status information read table entry, if yes, ending the ONU information aging procedure in the present virtual frame period, otherwise, returns to step 101 to continue to read status information table.

[0094] 本发明适用于由OLT控制ONU接入的主从系统,OLT控制ONU的上行所有业务数据的转发接入包括MPCP或其他MAC消息,下行则为广播模式,数据在ONU处进行过滤接收, 下行的发送调度也是基于优先级的,以EF、MPCP、CPU/OAM、AF、DF的优先级次序进行下行调度转发。 [0094] The present invention is applicable to the main OLT forwards the access control the access of all the ONU traffic data from the system, the OLT controller comprises ONU uplink MPCP or other MAC messages, the downlink compared to the broadcast mode, data is received at the ONU filter , downlink transmission schedule is also based on the priority, the priority order EF, MPCP, CPU / OAM, AF, DF forwards the downlink scheduling.

[0095] 虽然通过参照本发明的某些优选实施例,已经对本发明进行了图示和描述,但本领域的普通技术人员应该明白,可以在形式上和细节上对其作各种各样的改变,而不偏离所附权利要求书所限定的本发明的精神和范围。 [0095] Although embodiments of the present invention by reference to certain preferred, the invention has been illustrated and described, those of ordinary skill in the art should understand may be made thereto in various form and detail change, the appended claims without departing from the spirit and scope of the invention defined in the appended.

Claims (13)

  1. 一种无源光网络的动态带宽分配方法,其特征在于,包括:光线路终端OLT接收来自于光网络单元ONU的多个业务的带宽指配请求;根据所述光网络单元的带宽指配请求中携带的上报信息,为所述光网络单元的所述业务进行授权;根据授权的信息,对同一光网络单元下的业务统一生成授权消息;将生成的所述授权消息发送给相应的光网络单元。 A dynamic bandwidth allocation method for a passive optical network, wherein, comprising: an OLT receives the bandwidth assignment request service plurality of optical network units ONU; according to the bandwidth assignment request to the optical network units by reporting the information carried in, the authorization service to the optical network unit; according to the information of the authorization, for the same service when the optical network unit to generate unified authorization message; generated the authorization message sent to the corresponding optical network unit.
  2. 2. 根据权利要求1所述的方法,其特征在于,所述的生成授权消息包括:以ONU为单位生成授权消息。 2. The method according to claim 1, wherein the authorization message is generated comprising: a unit to generate an authorization message to ONU.
  3. 3. 根据权利要求1所述的方法,其特征在于,在向所述的光网络单元发送授权消息时,同一光网络单元的至少两个业务的授权发送窗口是前后紧邻的。 3. The method according to claim 1, wherein, when sending an authorization message to the optical network unit, authorizing the same optical network unit transmits the at least two service windows immediately before and after.
  4. 4. 根据权利要求1所述的方法,其特征在于,所述为所述光网络单元的所述业务进行授权时,以业务端口为单位进行授权。 4. The method according to claim 1, wherein, when the authorization for said service of said optical network unit to authorize service port units.
  5. 5. 根据权利要求1或4所述的方法,其特征在于,所述为所述光网络单元的所述业务进行授权时,按预定的优先级进行授权。 5. The method of claim 1 or claim 4, wherein, when the authorization for said service of said optical network unit, and authorized by the predetermined priority.
  6. 6. 根据权利要求l所述的方法,其特征在于,还包括:记录每个0NU不响应的时间,当所述不响应时间达到预先设定的阈值时,释放所述0NU的资源。 6. The method as claimed in claim l, characterized by further comprising: recording the time each 0NU does not respond when the response time does not reach the threshold value set in advance, the release of resources in 0NU.
  7. 7. 根据权利要求6所述的方法,其特征在于,还包括:建立0NU激活超时计数表,用来记录每个0NU不响应的时间。 7. The method according to claim 6, characterized in that, further comprising: establishing 0NU activation timeout count table is used to record time for each 0NU unresponsive.
  8. 8. —种无源光网络的动态带宽分配装置,其特征在于,包括:带宽授权单元,用于接收来自于光网络单元的多个业务的带宽指配请求;根据所述光网络单元的带宽指配请求中携带的上报信息,为所述光网络单元的所述业务进行授权;授权消息生成单元,用于根据授权的信息,对同一光网络单元下的业务统一生成授权消息;授权消息发送单元,将生成的所述授权消息发送给相应的光网络单元。 8. - type of dynamic bandwidth allocation apparatus of a passive optical network, wherein, comprising: a bandwidth grant means for receiving a service from a plurality of optical network units of bandwidth assignment request; bandwidth of the optical network unit according to the refers to a ligand reporting information carried in the request, the service authorization to the optical network unit; authorization message generating means, based on the information for authorization, business under the same uniform optical network unit generates an authorization message; transmitting authorization message means to generate the authorization message sent to the corresponding optical network unit.
  9. 9. 根据权利要求8所述的动态带宽分配装置,其特征在于,还包括:老化处理单元:用于记录每个0NU不响应的时间,当所述不响应时间达到预先设定的阈值时,释放所述0NU的资源。 9. A dynamic bandwidth allocation apparatus according to claim 8, characterized in that, further comprising: aging a processing unit: for each of the time recording 0NU no response when the response time does not reach the threshold value set in advance, the release of the resource 0NU.
  10. 10. —种无源光网络系统,包括光线路终端0LT,所述0LT与多个光网络单元0NU进行通信,其特征在于:所述的0LT,用于接收来自于所述0NU的多个业务的带宽指配请求;根据所述带宽指配请求中携带的上报信息,为所述光网络单元的所述业务进行授权;根据所述授权的信息,对同一光网络单元下的业务统一生成授权消息;将生成的所述授权消息发送给相应的光网络单元。 10. - kind of passive optical network system includes an optical line terminal 0LT, said 0LT communicating with a plurality of optical network units 0NU, wherein: said 0LT, for receiving a service from a plurality of said 0NU a bandwidth assignment request; means according to the bandwidth assignment request report information carried in the service authorization to the optical network unit; according to the information of the authorization of operations under the same uniform optical network unit generating an authorization message; generated the authorization message sent to the corresponding optical network unit.
  11. 11. 根据权利要求IO所述的无源光网络系统,其特征在于:所述的0LT在生成授权消息时,以0NU为单位生成授权消息。 11. The passive optical network system of claim IO, wherein: said 0LT in generating the authorization message, to generate an authorization message 0NU units.
  12. 12. 根据权利要求IO所述的无源光网络系统,其特征在于:所述0LT在向相应的光网络单元发送授权消息时,同一光网络单元的至少两个业务的授权发送窗口是前后紧邻的。 12. The passive optical network system of claim IO, wherein: said sending an authorization message when 0LT to the corresponding optical network unit, authorizing the same optical network unit transmits the at least two service windows immediately before and after of.
  13. 13.根据权利要求10所述的无源光网络系统,其特征在于:所述的OLT在为所述光网络单元的所述业务进行授权时,以业务端口为单位进行授 13. A passive optical network system according to claim 10, wherein: the OLT at the service authorization to the optical network unit to be granted service port units
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