WO2010043131A1 - 一种城域网接纳控制的方法及设备与系统 - Google Patents

一种城域网接纳控制的方法及设备与系统 Download PDF

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Publication number
WO2010043131A1
WO2010043131A1 PCT/CN2009/073065 CN2009073065W WO2010043131A1 WO 2010043131 A1 WO2010043131 A1 WO 2010043131A1 CN 2009073065 W CN2009073065 W CN 2009073065W WO 2010043131 A1 WO2010043131 A1 WO 2010043131A1
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WIPO (PCT)
Prior art keywords
transmission path
reservation request
resource reservation
bandwidth value
bandwidth
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PCT/CN2009/073065
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English (en)
French (fr)
Inventor
周倩
邹婷
黄福清
陈建群
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP09820207.0A priority Critical patent/EP2330790B1/en
Publication of WO2010043131A1 publication Critical patent/WO2010043131A1/zh
Priority to US13/086,957 priority patent/US8743686B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2852—Metropolitan area networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/74—Admission control; Resource allocation measures in reaction to resource unavailability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/74—Admission control; Resource allocation measures in reaction to resource unavailability
    • H04L47/745—Reaction in network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/825—Involving tunnels, e.g. MPLS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/827—Aggregation of resource allocation or reservation requests

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, device and system for metropolitan area network admission control.
  • a method for dynamically establishing a service path thereof is through a resource manager (RM) (ie, a resource admission control system RACS or a resource admission control function RACF)
  • RM resource manager
  • the Path Computation Element (PCE) or Control Plane cooperates with automatic road construction and dynamic management of network resources.
  • the resource manager sends a path establishment request carrying the service information, and the trigger control plane newly establishes a corresponding service path for the user by using different ID numbers according to the service information.
  • this method requires a complicated algorithm, and the RM directly interacts with the PCE/control plane. From the operation and maintenance point of view, the network resources cannot be controlled.
  • LSP label switched path
  • ID an identifier
  • a LSP with an ID of 10 can only communicate with a bandwidth of 2 M.
  • a new 4 M bandwidth LSP with the ID of 11 is created, because the original user sends the text by default.
  • the LSP with the ID of 10 does not automatically identify the 4M bandwidth LSP with the ID 11; therefore, the system switches the original service to the LSP with the ID 11, but the label switching path in the channel is caused during the handover.
  • the (LSP) resources are insufficient, causing problems such as loss, delay, and out-of-order of services during the handover process, which affects the quality of transmission services.
  • the purpose of the embodiments of the present invention is to provide a method, a device, and a system for receiving and controlling a metropolitan area network, and combining a dynamic admission control of a session and a convergence-based admission control transport network technology to aggregate a resource reservation request for a user occupying a transmission path bandwidth.
  • the bandwidth of the transmission path is dynamically adjusted in the metropolitan area network, so that the metropolitan area network resources are effectively utilized to ensure the quality of the transmission service.
  • a resource manager provided by the embodiment of the present invention includes:
  • An aggregation unit configured to aggregate a resource reservation request from a user, where the resource reservation request includes a bandwidth value to be occupied;
  • a determining unit configured to determine, according to a bandwidth threshold of the pre-configured transmission path, whether the total bandwidth value in the aggregated resource reservation request exceeds a bandwidth threshold value of the pre-configured transmission path;
  • a determining processing unit configured to: when it is determined that a total bandwidth value in the aggregated resource reservation request exceeds a bandwidth threshold of the pre-configured transmission path, control an identifier of the transmission path originally allocated by the system The ID number re-establishes a transmission path, and the bandwidth value of the re-established transmission path is greater than the total bandwidth value in the aggregated resource reservation request, where the total bandwidth value is in the resource reservation request after convergence.
  • a metropolitan area network admission control system provided by the embodiment of the present invention includes: a resource manager, configured to aggregate a resource reservation request from a user, and determine a total bandwidth in the aggregated resource reservation request.
  • the value exceeds the bandwidth threshold of the pre-configured transmission path if yes, re-establishing a transmission path with the ID number of the allocated transmission path, where the bandwidth value of the re-established transmission path is greater than The total bandwidth value in the resource reservation request after the aggregation, where the total bandwidth value is a sum of bandwidth values to be occupied by the data in the resource reservation request after the aggregation;
  • a path manager configured to connect with the resource manager, receive a control signal sent by the resource manager, and reconfigure the network element parameter for the re-established transmission path according to the control signal.
  • the resource reservation request from the user is aggregated by the resource manager, and the total bandwidth value in the resource reservation request is determined according to the bandwidth threshold of the initially configured transmission path.
  • the initially configured bandwidth threshold if yes, dynamically adjusts the bandwidth of the transmission path by controlling the manner in which the original transmission path ID number is retained. Therefore, the system avoids the need to create a new LSP for each user session request to transmit services, causing service loss, delay, and out-of-order in the process of service switching, so that the metropolitan area network resources can be effectively utilized to ensure the quality of the transmission service.
  • the service provider can purchase network resources when needed, and the network provider can also use the metropolitan area network based aggregation control mechanism to serve more service providers under the same network architecture to ensure the transmission network. High capacity, reducing the burden on the network.
  • FIG. 1 is a flowchart of a method for receiving control of a metropolitan area network according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of an operation for implementing a metropolitan area network admission control method by combining various device modules in a system
  • FIG. 4 is a schematic structural diagram of a metropolitan area network admission control system according to an embodiment of the present invention.
  • a first embodiment of the present invention provides a method for receiving control of a metropolitan area network, including the following steps:
  • аданн ⁇ 101 Aggregate a resource reservation request from a user by using a resource manager (RM), where the resource reservation request includes a bandwidth value that is required to transmit data.
  • RM resource manager
  • Each user issues a resource reservation request to the resource manager (RM) according to the size of the data to be transmitted, requesting the allocation of the transmission path.
  • the resource manager (RM) aggregates the multiple resource reservation requests, and after negotiating with the network side, allocates a certain transmission path in the channel to the user according to the resource reservation request, and obtains an identifier of the corresponding transmission path (Identifier , ID) number.
  • the resource manager determines whether the total bandwidth value in the aggregated resource reservation request exceeds a bandwidth threshold of the pre-configured transmission path.
  • the total bandwidth value is a sum of bandwidth values that need to be occupied by the transmission data in the resource reservation request after the aggregation.
  • a channel includes a plurality of transmission paths, and the bandwidth threshold of the transmission path can be pre-configured according to a dynamic adjustment policy.
  • the channel bandwidth is 100M, and there are three label switching paths (LSPs) in the channel.
  • the bandwidth of the LSP with ID number 1 is 10M.
  • the bandwidth of the LSP with ID number 2 is 20M, and the bandwidth of the LSP with ID number 3 is 50M.
  • the bandwidth threshold of the transmission path can be set according to the LSP of the maximum bandwidth. For example, it is set to 50M.
  • the bandwidth of the LSP with the ID number 3 is the same. You can also set the total bandwidth value of multiple LSPs as a reference, for example, set to 70M.
  • the bandwidth threshold is set to 50M
  • the user does not need to send 10M data through the transmission path with ID number 3
  • another user B needs to send 50M data through the transmission path with ID number 3
  • bandwidth threshold of the pre-configured transmission path If it is determined that the bandwidth threshold of the pre-configured transmission path is exceeded, reestablishing a transmission path by using an ID number of the transmission path allocated to the user, where a bandwidth value of the re-established transmission path is greater than The total bandwidth value in the resource reservation request after the aggregation.
  • the manner of modifying the bandwidth of the transmission path can be flexibly selected. For example, another channel that satisfies the total bandwidth value in the resource reservation request can be found in the metropolitan area network, and a transmission is newly established by using the original transmission path ID number. Path, the original transmission path is removed at the same time; one or more transmission paths in the original channel may be removed, bandwidth resources are released, and a transmission path is re-established with the ID number of the transmission path originally allocated by the system. The bandwidth value of the re-established transmission path is greater than the total bandwidth value in the aggregated resource reservation request.
  • the resource The manager returns information to the user that can transmit the service.
  • the method further includes pre-configuring a bandwidth threshold of a channel or a transmission path in the metropolitan area network.
  • the method for receiving control of the metropolitan area network provided by the embodiment is as follows:
  • the application function module sends a resource reservation request to the RM through the diameter Diameter interface according to the session service request of the user, where the resource reservation request includes: a user name, an application identifier of the application function (AF-Application-Identifier), Any combination of one or more of Service-Class and Media-Component-Description and bandwidth information that needs to occupy the LSP.
  • the resource reservation request includes: a user name, an application identifier of the application function (AF-Application-Identifier), Any combination of one or more of Service-Class and Media-Component-Description and bandwidth information that needs to occupy the LSP.
  • the RM aggregates the resource reservation request from the user, and determines whether the total bandwidth value in the aggregated resource reservation request exceeds a bandwidth threshold of the pre-configured transmission path.
  • the RM aggregates the resource reservation request from the user, that is, receives the resource reservation request from multiple users, and the RM does not immediately create a new LSP to transmit the service for each resource reservation request, but performs the metropolitan area network.
  • Medium LSP convergence admission control process after negotiation with the network side, according to resources Reserve the request, assign a transmission path in the channel to the user, and obtain the ID number of the corresponding transmission path. And determining whether the total bandwidth value in the aggregated resource reservation request exceeds a bandwidth threshold of the pre-configured transmission path.
  • control is performed to re-establish a transmission path by using the ID number of the transmission path originally allocated by the system.
  • the RM sends a control signal to the path manager that dynamically adjusts the bandwidth of the transmission path through the resource delegation interface, that is, a request to modify the LSP bandwidth, and the path manager may be a tunnel manager.
  • the tunnel manager receives the control signal sent by the RM, performs the transmission path originally allocated by the removal system, and re-establishes a transmission path by using the ID number of the transmission path originally allocated by the system, where the The bandwidth value of the established transmission path is greater than the total bandwidth value in the resource reservation request after the aggregation.
  • another channel that satisfies the total bandwidth value in the resource reservation request may be found in the metropolitan area network, and a transmission path is newly established by using the original transmission path ID number, and the original transmission path is removed.
  • one or more transmission paths in the original channel may be removed, bandwidth resources are released, and a transmission path is re-established with the ID number of the transmission path originally allocated by the system, after the re-establishment
  • the bandwidth value of the transmission path is greater than the total bandwidth value in the aggregated resource reservation request.
  • the bandwidth of channel 1 is 100M
  • the bandwidth of the LSP with ID number 1 is 10M
  • the bandwidth of LSP with ID number 2 is 20M
  • the ID number is 3.
  • the bandwidth of the LSP is 50M.
  • the system can control the ID number of 3 that is not enough to remove the bandwidth.
  • the LSP, or the LSP with the ID number 2 and the LSP with the ID number of 3, which is not used for the bandwidth, is released at the same time, the bandwidth resource is released, and an LSP with a bandwidth of 70 M is re-established with the ID number 3.
  • the subsequent LSP bandwidth value with ID number 3 is greater than the total bandwidth value in the aggregated resource reservation request.
  • the tunnel manager reconfigures related network element parameters in the metropolitan area network according to the result of modifying the LSP bandwidth, and dynamically adjusts the size of the corresponding LSP bandwidth between the network elements.
  • the RM returns information that dynamically adjusts the corresponding LSP bandwidth to the application function module.
  • the method for the metropolitan area network admission control provided by the foregoing embodiment can determine whether the total bandwidth requirement in the resource reservation request can be satisfied according to the bandwidth threshold of the pre-configured transmission path, and if not, The bandwidth of the transmission path is dynamically adjusted by retaining the original transmission path ID number to avoid service loss, delay, and out-of-order in the service switching process, so that the metropolitan area network resources are effectively utilized, and the network system is newly built.
  • the transmission path recalculates the burden of assigning a new ID number to ensure its quality of transmission.
  • the second embodiment of the present invention provides a resource manager, including
  • the aggregation unit 301 is configured to aggregate a resource reservation request from a user, where the resource reservation request includes a bandwidth value that is required to be used for transmitting data.
  • the determining unit 302 is configured to determine, according to the bandwidth threshold value of the pre-configured transmission path, whether the total bandwidth value in the aggregated resource reservation request exceeds a bandwidth threshold value of the pre-configured transmission path;
  • the determining processing unit 303 is configured to: when it is determined that the total bandwidth value in the aggregated resource reservation request exceeds a bandwidth threshold of the pre-configured transmission path, the transmission path allocated to the user The identifier ID number re-establishes a transmission path, the bandwidth value of the re-established transmission path is greater than the total bandwidth value in the aggregated resource reservation request, and the total bandwidth value is a resource reservation after convergence. The sum of the bandwidth values that are required to transmit data in the request.
  • the management unit 304 is configured to manage network resources of the user access side and the aggregation side.
  • the third embodiment of the present invention provides a metropolitan area network admission control system, which includes: an application function module 401, configured to connect with an upper layer application layer of the system, according to a bandwidth value that is required to be occupied from the transmission data.
  • the user side session service request sends a resource reservation request to the resource manager through the Diameter interface, where the resource reservation request includes a bandwidth value that the transmission data needs to occupy;
  • a resource manager 402 configured to aggregate a resource reservation request from a user, and determine the aggregated Whether the total bandwidth value in the resource reservation request exceeds the bandwidth threshold of the pre-configured transmission path, and if so, re-establish a transmission path with the identifier ID number of the transmission path allocated to the user.
  • the bandwidth value of the re-established transmission path is greater than the total bandwidth value in the aggregated resource reservation request, and the total bandwidth value is the sum of the bandwidth values to be occupied by the transmission data in the resource reservation request after the aggregation.
  • the path manager 403 is configured to connect to the resource manager 402, receive the control signal sent by the resource manager 402, and reconfigure the network element parameters of the established transmission path. Specifically, performing the removal of the transmission path originally allocated by the user, and re-establishing a transmission path by using the ID number of the transmission path originally allocated by the user.
  • the transmission path in the metropolitan area network refers to a label switching path LSP
  • the path manager is a tunnel manager.
  • the main functions of the resource manager (RM) are: aggregation resource reservation request; management of resources on the access side and the aggregation side; sending a bandwidth modification request of the transmission aggregation network to the tunnel manager; and tunnel Manager interactions collect topology and resource information.
  • the tunnel manager is mainly used for establishing, deleting, or modifying the LSP, and reconfiguring related network element parameters in the metropolitan area network according to the result of modifying the bandwidth.
  • the metropolitan area network admission control system provided by the above embodiment has a simple networking structure and a complicated control algorithm. Combined with the dynamic admission control of RM and the aggregation-based transport network technology, the bandwidth of the transmission path is dynamically adjusted by retaining the original transmission path ID number, so that the metropolitan area network resources are effectively utilized and the transmission service quality is guaranteed.

Description

一种城域网接纳控制的方法及设备与系统
本申请要求于 2008 年 10 月 15 日提交中国专利局、 申请号为 200810199175.4、发明名称为"一种城域网接纳控制的方法及设备与系统"的中 国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域， 尤其涉及一种城域网接纳控制的方法及设备 与系统。
背景技术
现有网络传输技术中， 为了实现多业务网络中的服务质量 (QoS), 其业务 路径动态建立的方法是通过资源管理器 (RM) (即资源接纳控制系统 RACS或 资源接纳控制功能 RACF )与路径计算元素 (PCE)或控制平面配合自动建路、 动态管理网络资源。 资源管理器发送携带业务信息的路径建立请求， 触发控 制平面根据业务信息为用户釆用不同 ID号新建立相应的业务路径。 但是釆用 这种方法需要复杂的算法， 而且 RM直接与 PCE/控制平面进行交互， 从运维 角度来看， 不能达到网络资源的可控。
上述现有技术方案仅仅基于会话的接纳控制来建立标签交换路径（ LSP ), 对于每个会话请求都要通过 PCE计算的结果重新建立新的 LSP, 即釆用不同 标识符（Identifier, ID )号来新建 LSP, 对个人用户线来说， 每次都要釆用不 同 ID号来新建 LSP不现实。 而且当用户发送的数据要走新 ID号 LSP时， 除 了新请求的业务要走这个新 ID号 LSP, 原来走旧 ID号 LSP的业务也要切换 到这个新 ID号 LSP上， 比如用户与服务器只能通过一条 ID为 10的 LSP通 信， 其带宽为 2M, 当用户发送的数据需要大于 2M带宽的 LSP来传输， 就要 新建一条 ID为 11的 4M带宽 LSP, 由于原先用户发送的 文都默认走 ID为 10的 LSP, 不会自动识别走 ID为 11的 4M带宽 LSP; 所以系统要将原业务 切换到这个 ID为 11的 LSP上， 但切换过程中会引起通道中的标签交换路径 ( LSP )资源不够， 造成切换过程中业务的损失、 时延和乱序等问题， 导致其 传输服务质量受到影响。
发明内容
本发明实施例的目的在于提供一种城域网接纳控制的方法及设备与系 统， 结合会话的动态接纳控制和基于汇聚的接纳控制传送网技术， 汇聚用户 占用传输路径带宽的资源预留请求， 在城域网络中动态调整所述传输路径的 带宽， 使城域网资源得到有效利用， 保证其传输服务质量。
本发明实施例提供的一种城域网接纳控制的方法， 包括：
汇聚来自用户的资源预留请求， 所述资源预留请求中包含传输数据需占 用的带宽值；
判断所述汇聚后的资源预留请求中的总带宽值是否超过预先配置的传输 路径的带宽门限值， 如果超过， 则以对所述用户分配的所述传输路径的标识 符 ID号重新建立一条传输路径， 所述重新建立后的传输路径的带宽值大于所 述汇聚后的资源预留请求中的总带宽值， 所述总带宽值为汇聚后的资源预留 请求中传输数据需占用的带宽值之和。
进一步， 本发明实施例提供的一种资源管理器， 包括：
汇聚单元， 用于汇聚来自用户的资源预留请求， 所述资源预留请求中包 含需占用的带宽值；
判断单元， 用于根据预先配置的传输路径的带宽门限值， 判断所述汇聚 后的资源预留请求中的总带宽值是否超过预先配置的传输路径的带宽门限 值；
判断处理单元， 用于当判断所述汇聚后的资源预留请求中的总带宽值超 过所述预先配置的传输路径的带宽门限值时， 则控制以系统原来分配的所述 传输路径的标识符 ID号重新建立一条传输路径， 所述重新建立后的传输路径 的带宽值大于所述汇聚后的资源预留请求中的总带宽值， 所述总带宽值为汇 聚后的资源预留请求中传输数据需占用的带宽值之和。 更进一步， 本发明实施例提供的一种城域网接纳控制系统， 包括： 资源管理器， 用于汇聚来自用户的资源预留请求， 并判断所述汇聚后的 资源预留请求中的总带宽值是否超过预先配置的传输路径的带宽门限值， 如 果超过， 则以对所述分配的所述传输路径的 ID号重新建立一条传输路径， 所 述重新建立后的传输路径的带宽值大于所述汇聚后的资源预留请求中的总带 宽值， 所述总带宽值为汇聚后的资源预留请求中传输数据需占用的带宽值之 和；
路径管理器， 用于与所述资源管理器连接， 接收所述资源管理器发送的 控制信号， 并根据所述控制信号， 对重新建立后的传输路径重新配置网元参 数。
釆用本发明的实施例， 通过资源管理器汇聚来自用户的资源预留请求， 并根据初始配置的传输路径的带宽门限值， 判断所述资源预留请求中的总带 宽值是否超过所述初始配置的带宽门限值， 如果是， 则通过控制保留原有所 述传输路径 ID号的方式来动态调整传输路径的带宽。 从而避免了系统针对每 个用户会话请求都要新建一个 LSP来传输业务， 引起业务切换过程中的业务 损失、 时延和乱序的问题， 使城域网资源得到有效利用， 保证其传输服务质 量。 同时让业务提供商就能够在需要的情况下购买网络资源， 网络提供商也 能够利用城域网基于汇聚的接纳控制机制， 在同样的网络架构下服务更多的 业务提供商， 保证传送网的高容量， 减少网络的负担。
附图说明
图 1是本发明实施例一提供的一种城域网接纳控制的方法的流程图； 图 2是结合系统中各个设备模块实现城域网接纳控制方法的操作流程图； 图 3是本发明实施例提供的一种资源管理器结构示意图；
图 4是本发明实施例提供的一种城域网接纳控制系统结构示意图。
具体实施方式
为使本发明更加容易理解， 下面结合附图对本发明作进一步阐述， 但附 图中的实施例不构成对本发明的任何限制。
如图 1 所示， 本发明实施例一提供了一种城域网接纳控制的方法， 包括 如下步骤：
101、 通过资源管理器 (RM) 汇聚来自用户的资源预留请求， 所述资源预 留请求中包含传输数据需占用的带宽值。
每个用户根据要传送数据的大小向资源管理器 (RM)发出资源预留请求， 要求分配传输路径。 资源管理器 (RM)汇聚所述多个资源预留请求， 与网络侧 进行协商后， 根据资源预留请求， 分配通道中的某条传输路径给用户， 并获 得相应传输路径的标识符（ Identifier, ID )号。
102、 资源管理器 (RM) 判断所述汇聚后的资源预留请求中的总带宽值是 否超过预先配置的传输路径的带宽门限值。
其中所述总带宽值为汇聚后的资源预留请求中传输数据需占用的带宽值 之和。
一个通道包括多条传输路径， 所述传输路径的带宽门限值可以根据动态 调整策略进行预先配置。 例如， 通道带宽为 100M, 通道中有 3条标签交换路 径（LSP ), 其中 ID号为 1的 LSP的带宽为 10M。 ID号为 2的 LSP的带宽为 20M, ID号为 3的 LSP的带宽为 50M, 所述传输路径的带宽门限值可以根据 最大带宽的 LSP为参考进行设定， 比如设定为 50M, 即和 ID号为 3的 LSP 的带宽值相同； 也可以根据多条 LSP的总带宽值作为参考进行设定， 比如设 定为 70M。
当设定带宽门限值为 50M时， 用户曱需通过 ID号为 3的传输路径发送 10M的数据， 同时又有一个用户乙需通过 ID号为 3的传输路径发送 50M的 数据， 这时判断用户资源预留请求中的总带宽值超过了预先配置的传输路径 的带宽门限值 50M, 即超过了 ID号为 3的 LSP的带宽值， 就需要增加 ID号 为 3的 LSP的带宽， 而不是现有技术中以新的 ID号新建一条带宽大于 60M 的 LSP。 103、 如果判断为超过预先配置的传输路径的带宽门限值， 则以对所述用 户分配的所述传输路径的 ID号重新建立一条传输路径， 所述重新建立后的传 输路径的带宽值大于所述汇聚后的资源预留请求中的总带宽值。
修改传输路径带宽的方式可灵活选择， 例如可以在城域网寻找满足所述 资源预留请求中的总带宽值的另外一个通道， 找到后以原有的所述传输路径 ID号重新建立一条传输路径， 同时拆除原有的所述传输路径； 还可以拆除原 有通道中的一条或多条传输路径， 释放带宽资源， 并以系统原来分配的所述 传输路径的 ID号重新建立一条传输路径， 所述重新建立后的传输路径的带宽 值大于所述汇聚后的资源预留请求中的总带宽值。
104、 如果判断为不超过预先配置的通道或传输路径的带宽门限值， 或者 所述重新建立后的传输路径的带宽值大于所述汇聚后的资源预留请求中的总 带宽值， 则资源管理器 (RM)向用户返回可以传送业务的信息。
作为一种实施方式在上述实施例一的步骤 102之前还包括预先配置城域 网中通道或传输路径的带宽门限值。 施例提供的城域网接纳控制的方法， 其处理步骤如下：
201、 应用功能模块根据收到用户的会话业务请求， 通过直径 Diameter 接口向 RM发送资源预留请求， 所述资源预留请求包括： 用户名、 应用功能 的应用标识（ AF- Application-Identifier )、 业务类型 （Service-Class )和媒体成 分描述（ Media-Component-Description )和需占用 LSP的带宽信息的一种或几 种的任意组合。
202、 RM汇聚来自用户的资源预留请求， 并判断所述汇聚后的资源预留 请求中的总带宽值是否超过预先配置的传输路径的带宽门限值。
具体为： RM汇聚来自用户的资源预留请求， 即接收来自多个用户的资源 预留请求， RM并不针对每个资源预留请求都马上新建一个 LSP来传输业务， 而是执行城域网中 LSP汇聚接纳控制过程， 与网络侧进行协商后， 根据资源 预留请求，分配通道中的某条传输路径给用户，并获得相应传输路径的 ID号。 判断所述汇聚后的资源预留请求中的总带宽值是否超过预先配置的传输路径 的带宽门限值。
203、 当判断超过预先配置的传输路径的带宽门限值时， 则控制以系统原 来分配的所述传输路径的 ID号重新建立一条传输路径。
RM通过资源委托接口向路径管理器发出动态调整所述传输路径通道带 宽的控制信号，即修改 LSP带宽的请求，所述路径管理器可以是隧道（Tunnel ) 管理器。
204、 隧道（Tunnel ) 管理器接收所述 RM发送的控制信号， 执行拆除系 统原来分配的所述传输路径， 并以系统原来分配的所述传输路径的 ID号重新 建立一条传输路径， 所述重新建立后的传输路径的带宽值大于所述汇聚后的 资源预留请求中的总带宽值。
作为一种实施方式， 可以在城域网寻找满足所述资源预留请求中的总带 宽值的另外一个通道， 找到后以原有的所述传输路径 ID号重新建立一条传输 路径， 同时拆除原有的所述传输路径；
作为另一种实施方式， 还可以拆除原有通道中的一条或多条传输路径， 释放带宽资源， 并以系统原来分配的所述传输路径的 ID号重新建立一条传输 路径， 所述重新建立后的传输路径的带宽值大于所述汇聚后的资源预留请求 中的总带宽值。 例如， 通道 1的带宽为 100M, 通道 1中有 3条标签交换路径 ( LSP ), 其中 ID号为 1的 LSP的带宽为 10M, ID号为 2的 LSP的带宽为 20M, ID号为 3的 LSP的带宽为 50M, 用户原来通过 ID号为 3的 LSP传送 数据， 但现在要传送 60M的数据， 就发现 ID号为 3的 LSP带宽不够用， 系 统可以控制拆除带宽不够用的 ID号为 3的 LSP,或者同时拆除空闲不用的 ID 号为 2的 LSP和带宽不够用的 ID号为 3的 LSP, 释放带宽资源， 并以 ID号 为 3重新建立一条带宽为 70M的 LSP, 所述重新建立后的 ID号为 3的 LSP 带宽值大于所述汇聚后的资源预留请求中的总带宽值。 205、 隧道（Tunnel )管理器根据修改 LSP带宽的结果重新配置城域网中 相关网元参数， 动态调整各网元之间相应 LSP带宽的大小。
206、 RM向应用功能模块返回动态调整相应 LSP带宽后的信息。
釆用上述实施例提供的城域网接纳控制的方法， 能根据预先配置的传输 路径的带宽门限值， 判断所述资源预留请求中的总带宽需求是否能够满足， 如果不满足， 则釆用保留原有传输路径 ID号的方式来动态调整传输路径的带 宽， 避免引起业务切换过程中的业务损失、 时延和乱序的问题， 使城域网资 源得到有效利用，减少网络系统为新建传输路径重新计算分配新 ID号的负担， 保证其传输服务质量。
如图 3所示， 本发明实施例二提供了一种资源管理器， 包括
汇聚单元 301 , 用于汇聚来自用户的资源预留请求， 所述资源预留请求中 包含传输数据需占用的带宽值；
判断单元 302, 用于根据预先配置的传输路径的带宽门限值， 判断所述汇 聚后的资源预留请求中的总带宽值是否超过预先配置的传输路径的带宽门限 值；
判断处理单元 303 ,用于当判断所述汇聚后的资源预留请求中的总带宽值 超过所述预先配置的传输路径的带宽门限值时， 则以对所述用户分配的所述 传输路径的标识符 ID号重新建立一条传输路径， 所述重新建立后的传输路径 的带宽值大于所述汇聚后的资源预留请求中的总带宽值， 所述总带宽值为汇 聚后的资源预留请求中传输数据需占用的带宽值之和。
管理单元 304, 用于管理用户接入侧和汇聚侧的网络资源。
如图 4所示， 本发明实施例三提供了一种城域网接纳控制系统， 其包括： 应用功能模块 401 , 用于与系统上层应用层连接，根据来自包含传输数据 需占用的带宽值的用户侧会话业务请求， 通过 Diameter接口向资源管理器发 送资源预留请求， 所述资源预留请求中包含传输数据需占用的带宽值；
资源管理器 402, 用于汇聚来自用户的资源预留请求， 并判断所述汇聚后 的资源预留请求中的总带宽值是否超过预先配置的传输路径的带宽门限值， 如果超过， 则以对所述用户分配的所述传输路径的标识符 ID号重新建立一条 传输路径， 所述重新建立后的传输路径的带宽值大于所述汇聚后的资源预留 请求中的总带宽值， 所述总带宽值为汇聚后的资源预留请求中传输数据需占 用的带宽值之和。
路径管理器 403 , 用于与所述资源管理器 402连接，接收所述资源管理器 402发送的控制信号， 重新配置建立后的传输路径的网元参数。 具体为， 执行 拆除为用户原来分配的所述传输路径， 并以对用户原来分配的所述传输路径 的 ID号重新建立一条传输路径，
作为一种实施方式， 所述城域网中的传输路径是指标签交换路径 LSP, 所述路径管理器为隧道（Tunnel ) 管理器。 所述资源管理器 (RM)的主要功能 有： 汇聚资源预留请求； 管理接入侧和汇聚侧的资源； 向隧道（Tunnel )管理 器发送传送汇聚网的带宽修改请求； 与隧道 ( Tunnel )管理器相互作用收集拓 朴和资源信息。 所述隧道（Tunnel ) 管理器主要用于 LSP 的建立、 删除或带 宽修改， 并根据修改带宽的结果重新配置城域网中相关网元参数。
釆用上述实施例提供的城域网接纳控制系统， 其组网结构简单， 控制算 法不复杂。 结合 RM的动态接纳控制以及基于汇聚的传送网技术， 釆用保留 原有传输路径 ID号的方式来动态调整传输路径的带宽， 使城域网资源得到有 效利用， 保证其传输服务质量。
以上所述是本发明的优选实施方式而已， 当然不能以此来限定本发明之 权利范围， 应当指出， 对于本技术领域的普通技术人员来说， 在不脱离本发 明原理的前提下， 还可以做出若干改进和变动， 这些改进和变动也视为本发 明的保护范围。

Claims

权 利 要求 书
1、 一种城域网接纳控制的方法， 其特征在于， 包括：
汇聚来自用户的资源预留请求， 所述资源预留请求中包含传输数据需占用 的带宽值；
判断所述汇聚后的资源预留请求中的总带宽值是否超过预先配置的传输路 径的带宽门限值， 如果超过， 则以对所述用户分配的所述传输路径的标识符 ID 号重新建立一条传输路径， 所述重新建立后的传输路径的带宽值大于或等于所 述汇聚后的资源预留请求中的总带宽值， 所述总带宽值为汇聚后的资源预留请 求中传输数据需占用的带宽值之和。
2、 根据权利要求 1所述的城域网接纳控制的方法， 其特征在于， 所述判断 所述汇聚后的资源预留请求中的总带宽值是否超过预先配置的传输路径的带宽 门限值步骤之前还包括：
预先配置城域网中传输路径的带宽门限值。
3、 根据权利要求 1所述的城域网接纳控制的方法， 其特征在于， 所述以对 所述用户分配的所述传输路径的标识符 ID号重新建立一条传输路径的步骤进一 步包括：
向路由管理器发送控制信号， 以使得所述路由管理器根据所述控制信号对 所述重新建立后的传输路径重新配置网元参数。
4、 根据权利要求 1所述的城域网接纳控制的方法， 其特征在于， 所述方法 进一步包括：
如果所述汇聚后的资源预留请求中的总带宽值没超过预先配置的传输路径 的带宽门限值， 则向用户返回允许传送数据的信息。
5、 根据权利要求 1至 4任 一项所述城域网接纳控制的方法， 其特征在于， 所述城域网中的传输路径是指 标签交换路径 LSP。
6、 一种资源管理器， 其特征在于， 包括：
汇聚单元， 用于汇聚来自用户的资源预留请求， 所述资源预留请求中包含 需占用的带宽值；
判断单元， 用于根据预先配置的传输路径的带宽门限值， 判断所述汇聚后 的资源预留请求中的总带宽值是否超过预先配置的传输路径的带宽门限值； 判断处理单元， 用于当判断所述汇聚后的资源预留请求中的总带宽值超过 所述预先配置的传输路径的带宽门限值时， 则以对所述用户分配的所述传输路 径的标识符 ID号重新建立一条传输路径， 所述重新建立后的传输路径的带宽值 大于所述汇聚后的资源预留请求中的总带宽值， 所述总带宽值为汇聚后的资源 预留请求中传输数据需占用的带宽值之和。
7、 根据权利要求 6所述的资源管理器， 其特征在于， 所述资源管理器还包 括管理单元， 用于管理用户接入侧和汇聚侧的网络资源。
8、 根据权利要求 6所述的资源管理器， 其特征在于， 所述判断处理单元还 用于当所述汇聚后的资源预留请求中的总带宽值未超过预先配置的传输路径的 带宽门限值， 向用户返回允许传送数据的信息。
9、 一种城域网接纳控制系统， 其特征在于， 包括：
资源管理器， 用于汇聚来自用户的资源预留请求， 并判断所述汇聚后的资 源预留请求中的总带宽值是否超过预先配置的传输路径的带宽门限值， 如果超 过，则以对所述用户分配的所述传输路径的标识符 ID号重新建立一条传输路径， 所述重新建立后的传输路径的带宽值大于所述汇聚后的资源预留请求中的总带 宽值， 其中所述资源预留请求中包含传输数据需占用的带宽值， 所述总带宽值 为汇聚后的资源预留请求中传输数据需占用的带宽值之和；
路径管理器， 用于与所述资源管理器连接， 接收所述资源管理器发送的控 制信号， 并根据所述控制信号， 对重新建立后的传输路径重新配置网元参数。
10、 根据权利要求 9所述城域网接纳控制系统， 其特征在于， 还包括： 应用功能模块， 用于与所述资源管理器连接， 根据收到的包含传输数据需 占用的带宽值的用户侧业务请求， 通过直径 Diameter接口向所述资源管理器发 送资源预留请求， 所述资源预留请求中包含传输数据需占用的带宽值。
11、 根据权利要求 9所述城域网接纳控制系统， 其特征在于， 所述城域网 中的传输路径是指标签交换路径 LSP, 所述路径管理器为隧道管理器。
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US20110188374A1 (en) 2011-08-04
EP2330790A1 (en) 2011-06-08
US8743686B2 (en) 2014-06-03

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