WO2013159692A1 - 一种路由相关的节能方法、网络设备和系统 - Google Patents

一种路由相关的节能方法、网络设备和系统 Download PDF

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Publication number
WO2013159692A1
WO2013159692A1 PCT/CN2013/074555 CN2013074555W WO2013159692A1 WO 2013159692 A1 WO2013159692 A1 WO 2013159692A1 CN 2013074555 W CN2013074555 W CN 2013074555W WO 2013159692 A1 WO2013159692 A1 WO 2013159692A1
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energy consumption
path
path calculation
pce
energy
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PCT/CN2013/074555
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English (en)
French (fr)
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董杰
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华为技术有限公司
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Publication of WO2013159692A1 publication Critical patent/WO2013159692A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08Configuration management of networks or network elements
    • H04L41/0803Configuration setting
    • H04L41/0823Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
    • H04L41/0833Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability for reduction of network energy consumption

Definitions

  • the present invention relates to the field of communications, and in particular, to a route related energy saving method, a network device, and a system.
  • Network energy conservation mainly includes two levels: 1. Single-point equipment energy saving, through the innovation and optimization of chip, device and equipment architecture, reducing energy consumption of single equipment and improving energy efficiency; 2. Network-level energy saving, the main idea is to combine the energy of network equipment The consumption characteristics, through the control of the network protocol, enable the devices in the network to coordinate and coordinate, control and manage the data traffic in the network, realize the energy-efficient utilization of the network, and reduce the energy consumption of the entire network.
  • the route calculation unit is used to implement the energy-efficient route calculation of the network, and the network traffic is deployed to achieve the goal of energy saving.
  • a route related energy saving method comprising: a path computation client PCC (Path Computation Client) to send a path calculation request message to a path calculation unit PCE;
  • the path calculation request message includes energy saving information.
  • the energy saving information includes an energy saving objective function object, and the energy saving target function object is used to describe that the path of the PCE is energy saving.
  • the energy saving information further includes an energy consumption related metric object, and the energy related metric object is used to define a manner of describing the energy consumption of the path.
  • the energy saving information further includes total energy consumption upper limit information, and the total energy consumption upper limit information defines a total energy consumption upper limit allowed by the path calculation request.
  • the energy saving information further includes a global energy consumption limit target, and the global energy consumption limit target defines an upper limit of the energy consumption of the arbitrary path of the PCE in the global calculation.
  • a network device comprising a path calculation client PCC, the PCC is configured to: send a path calculation request message to the path calculation unit PCE; and the path calculation request message includes energy saving information.
  • the energy saving information includes at least a power saving target function object, and the energy saving target function object is used to describe that the target of the PCE path calculation is energy saving.
  • a network device comprising a path calculation unit PCE, the PCE is configured to: receive a path calculation request message from a path calculation client PCC; and the path calculation request message includes energy saving information.
  • the energy saving information includes at least a power saving target function object, and the energy saving target function object is used to describe that the target of the PCE path calculation is energy saving.
  • a system comprising a path computation client PCC and a path computation unit PCE, wherein the PCC is configured to send a message of a path computation request to a PCE; and the path computation request message includes energy conservation information.
  • the energy saving information includes at least a power saving target function object, and the energy saving target function object is used to describe that the target of the PCE path calculation is energy saving.
  • FIG. 1 is a schematic diagram of a PCE application in the prior art
  • FIG. 2 is a flow chart of a method according to an embodiment of the present invention
  • 3 is a schematic diagram of a data packet according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a data packet according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a data packet according to an embodiment of the present invention.
  • Figure 6 is a schematic illustration of an apparatus for carrying out the method of the present invention in an embodiment of the present invention.
  • PCE is a path computation architecture of Multi-Protocol Label Switching (MPLS) network, which can implement centralized path calculation based on various constraints.
  • PCEP is a protocol for path calculation request and response communication between the path computation client PCC (Path Computation Client) and the PCE (Path Computation Element), which is described by RFC5440.
  • RFC5541 introduces the objective function Objective Fraction for PCEP, which describes the specific target of the path calculation request.
  • RFC5557 describes the mechanism for global path optimization (Global Concurrent Optimization) based on PCE.
  • a PCE is responsible for the path calculation and management of an autonomous system, and each PCE stores the topology connection relationship and link state information of all network devices in the network.
  • the method of the embodiment of the present invention may be implemented by a PCE and a PCC, and the PCE may be included in a router or a data server having a path calculation function, and the PCC may be included in a router or a network management device in the autonomous system.
  • the path calculation client PCC 201 transmits a path calculation request 203 to the path calculation unit PCE 202.
  • the path calculation request 203 includes energy saving information.
  • the energy saving information includes an energy saving objective function object 204, an energy consumption related metric value object 205, a total energy consumption upper limit information 206, and a global energy consumption limiting target 207.
  • the message containing the energy saving objective function object 204 is as shown in FIG.
  • the PCEP protocol is extended as follows: Define a new objective function code Objective Function Code, as in the OF Code (MEC) field in Figure 3, the requirement is described as Minimize Energy Constraint (MEC).
  • MEC Minimize Energy Constraint
  • a newly allocated 16-bit objective function identifier is used to identify the energy-saving target of the path calculation, and the Objective Function can be carried in the PCReq and PCRep using the objective function object OF (Objective Function) Object, describing all the information in the request message.
  • the goal of routing global path calculations is to minimize energy consumption.
  • PCReq is a path calculation request sent by the PCC to the PCE
  • PCRep is a path calculation response sent by the PCE to the PCC.
  • a message containing an energy related metric object 205 is shown in FIG.
  • the Metric Object in the PCEP protocol packet carries the newly defined Metric Type: Cumulative Energy Consumption, and uses the newly assigned Metric Type Code ( Figure 3, The T field in the Metric Type Object is identified. Energy-related metric types define how energy is described.
  • the message containing the total energy cap information 206 is as shown in FIG.
  • a set identifier for the total energy consumption cap is provided in the PCEP protocol packet.
  • the current path calculation request message sets an upper limit value for the total energy consumption.
  • the upper limit value is identified by using a metric-value value. The value represents the total energy consumption upper limit for all paths that need to be calculated.
  • the identifier C it indicates that the path calculation requester requests the PCE to return the total energy consumption corresponding to the path calculation result in the path calculation response message PCRep, and uses the metric-value value in FIG. 3 to identify the total energy consumption calculated. value.
  • the global energy consumption limit target 207 is as shown in FIG.
  • a new TLV type, length, and assignment
  • Maximum Energy Consumption Max Energy Consumption ⁇
  • This globally qualified target defines the PCE for all calculated paths, each The upper limit of the energy consumption of the path.
  • the TLV is carried in the Optional TLV (s) field in the Global Constraints Object ( Figure 4). Specifically, as shown in Figure 5, the TLV field includes the type (Type) and length ( Length ) Energy Consumption Upper bound .
  • the path calculation unit PCE can be in the PCEP OPEN
  • the various path calculation targets supported by the PCE are listed by the objective function list OF-List (Objective Function list) TLV.
  • the PCE supporting the energy-saving path calculation can list the energy-saving calculation target "Minimize Energy Consumption (MEC)" defined in the present invention in the OF-List TLV.
  • Figure 6 is a simplified illustration of a network device embodying the method of the present invention, which performs the method of the present invention by executing a series of instructions.
  • the network device can be connected to other devices through, for example, a network connection.
  • the network device can execute a series of instructions in sequence or in parallel.
  • FIG. 6 it should be understood that "device" can be interpreted as a single device or a collection of multiple devices that perform the methods of the present invention by instructions.
  • Network device 600 includes a processor 602 (e.g., a CPU) that can perform functions such as calculations, selections, or comparisons.
  • Main memory 604 can store parameters associated with the method of the present invention, such as energy saving objective function object 204, energy related metric object 205, total energy cap information 206, and global energy consumption limit target 207, and the like.
  • the static memory 606 can store instructions and the like required for execution of the method of the present invention.
  • the processor 602, the main memory 604, and the static memory 606 are communicated via the bus 608.
  • Network device 600 may also include a disk drive unit 616 and a network interface device 620.
  • the disk drive unit 616 can also store instructions and the like required for execution of the method of the present invention.
  • Network interface device 620 can cause network device 600 to communicate with the outside, e.g., send path computation request 203.
  • Disk drive unit 616 includes a machine readable medium 622 that stores more than one instruction and data structure 624 (e.g., software) that performs the methods of the present invention.
  • the above instructions may be stored in part or all of main memory 604 or processor 602.
  • the instructions and main memory 604 or processor 602 may also constitute the aforementioned machine readable medium. Additionally, the foregoing instructions may be sent to or received from network side 626 via network interface device 620 and utilizing existing communication protocols.
  • Machine-readable medium 622 can include a single medium or multiple mediums that store instructions (e.g., a centralized or decentralized database or cache associated therewith).
  • the term “machine readable medium” can also be understood to be any storage, encoding or carrier medium that is executed by a machine to carry out the instructions of the method of the invention.
  • the term “machine readable medium” is also understood to include solid state memory and magneto-optical media.
  • a network device including a path calculation client PCC such as Figure 201 shows the same.
  • the PCC is used to send a path computation request message 203 to the path computation unit PCE.
  • the path calculation request message 203 includes at least an energy saving objective function object 204, and the energy saving objective function object 204 is used to describe that the target of the path calculation of the PCE is energy saving.
  • the message 203 of the path calculation request further includes one or more of the energy-related metric object 205, the total energy cap information 206, or the global energy limit target 207.
  • the energy related metric object 205 is used to define the manner in which the energy consumption of the path is described.
  • the total energy cap information 206 defines the total energy cap allowed by the path computation request.
  • the global energy consumption limit target 207 defines the upper limit of the energy consumption of any path of the PCE in the global calculation.
  • the network device including the path computation unit PCE is as shown at 202 in FIG.
  • the PCE is for receiving a path computation request message 203 from the path computation client PCC.
  • the path calculation request message 203 includes at least an energy saving objective function object 204, and the energy saving target function object 204 is used to describe that the target of the path calculation of the PCE is energy saving.
  • the path calculation request message 203 also includes one or more of the energy related metric object 205, the total energy cap information 206, or the global energy limit target 207.
  • the energy related metric object 205 is used to define the way in which the energy consumption of the path is described.
  • the total energy cap information 206 defines the total energy cap allowed for the path computation request.
  • the global energy consumption limit target 207 defines the upper limit of the energy consumption of any path of the PCE in the global calculation.
  • the system includes a path computation client PCC 201 and a path computation unit PCE 202.
  • the PCC is used to send a Path Computation Request message 203 to the PCE.
  • the path calculation request message 203 includes at least a power save target function object 204, and the power save target function object 204 is used to describe that the target of the path calculation of the PCE is energy saving.
  • the path calculation request message 203 also includes one or more of an energy consumption related metric object 205, a total energy consumption upper limit information 206, or a global energy consumption limit target 207.
  • the energy related metric value object 205 is used to define the way in which the energy consumption of the path is described.
  • the total energy cap information 206 defines the total energy cap allowed for the path computation request.
  • the global energy consumption limit target 207 defines the upper limit of the energy consumption of any path for the PCE during global calculation.
  • the path calculation client PCC may also request to perform some The energy-efficient route calculation of a specific path, that is, in the current network state, a more energy-efficient route is calculated for the path.
  • a new service flow joins the network between two global path calculations, requiring a PCE calculation path.
  • the result of this calculation may not be the global most energy-efficient path, but saves global energy-saving optimization.
  • the path calculation request message PCReq is sent by the PCC to the PCE, which is set according to the following description in addition to the information identifying the path and the constraints on the resource:
  • the PCReq message can carry a Metric Object of type Cumulative Energy Consumption, where the Metric-Value field identifies the upper energy limit allowed for the path when the B (Bound) flag is set; and when the C (Computed Metric) flag is set When it is requested, the requesting PCE returns the calculated path energy consumption in the PCRep message;
  • the PCE After receiving the PCReq message containing the relevant parameters of the energy-saving calculation, the PCE performs path calculation according to the energy-saving target and the energy-consumption constraint carried therein, and obtains the energy-saving path.
  • the constraint-based path calculation algorithm used in the prior art is applicable to the PCE of the present invention, which will not be described one by one in this patent application.
  • the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform, and can also be implemented by hardware.
  • the technical solution of the embodiment of the present invention may be embodied in the form of a software product, where the computer software product may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions for making a A computer device, or server, or other network device, performs the methods described in various embodiments of the present invention or in some portions of the embodiments.

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Abstract

本发明涉及通信领域,公开了路由相关的节能方法、路由设备和系统,方法包括路径计算客户端PCC向路径计算单元PCE发送路径计算请求消息,路径计算请求消息包括节能目标函数对象,还包括能耗相关的度量值对象、总能耗上限信息或全局能耗限制目标中的一种或多种,节能目标函数对象用于描述所述PCE的路径计算的目标为节能,能耗相关的度量值对象用于定义描述路径的能耗的方式,总能耗上限信息定义了所述路径计算请求所允许的总能耗上限;全局能耗限制目标定义了所述PCE在全局计算时任意路径的能耗上限。

Description

一种路由相关的节能方法、 网络设备和系统
本申请要求于 2012 年 4 月 26 日提交中国专利局、 申请号为 201210126140. 4、 发明名称为 "一种路由相关的节能方法、 网络设备和系 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 本发明涉及通信领域, 特别涉及一种路由相关的节能方法、 网络设备 和系统。
背景技术
随着网络规模的不断扩大以及业务量的快速增长, 网络所带来的能源 消耗也在快速增长, 促使节能减排逐渐成为网络运营商的关注的一个重要 问题。 其中主要的动机在于: 1) 政策要求, 政府、 运营商对环境保护作出 的承诺; 2) 能源价格持续增长, 运营商需要降低网络的运维成本。
网络节能主要包括两个层次: 1. 单点设备节能, 通过芯片, 器件和设 备架构的革新和优化, 降低单设备能耗, 提高能效; 2. 网络级节能, 主要 思路是结合网络设备的能耗特性, 通过网络协议的控制, 使得网络中各设 备之间进行协调配合, 对网络中的数据流量进行控制和管理, 实现对网络 的高能效利用, 降低整网的能耗。
发明内容
本发明实施例的目的是提供一种路由相关的节能方法、 网络设备和系 统。 采用路径计算单元 PCE ( Path Computation Element ) 路由计算架构, 通过扩展路径计算单元协议 PCEP ( Path Computat ion Element Protocol ) 实现网络的节能路由计算, 使整网流量的布放达到节能的目标。
本发明实施例的目的是通过以下技术方案实现的:
一种路由相关的节能方法, 包括: 路径计算客户端 PCC ( Path Computation Cl ient ) 向路径计算单元 PCE发送路径计算请求消息; 以及 所述路径计算请求消息包括节能信息。
可选的, 所述节能信息包括节能目标函数对象, 所述节能目标函数对 象用于描述所述 PCE 的路径计算的目标为节能。 所述节能信息还包括能耗 相关的度量值对象, 所述能耗相关的度量值对象用于定义描述路径的能耗 的方式。 所述节能信息还包括总能耗上限信息, 所述总能耗上限信息定义 了所述路径计算请求所允许的总能耗上限。 所述节能信息还包括全局能耗 限制目标, 所述全局能耗限制目标定义了所述 PCE在全局计算时任意路径 的能耗上限。
一种网络设备, 包括路径计算客户端 PCC , 所述 PCC用于: 向路径计算 单元 PCE发送路径计算请求消息; 以及路径计算请求消息包括节能信息。
可选的, 所述节能信息至少包括节能目标函数对象, 所述节能目标函 数对象用于描述所述 PCE的路径计算的目标为节能。
一种网络设备, 包括路径计算单元 PCE , 所述 PCE用于: 接收来自路径 计算客户端 PCC 的路径计算请求消息; 以及路径计算请求消息包括节能信 息。
可选的, 所述节能信息至少包括节能目标函数对象, 所述节能目标函 数对象用于描述所述 PCE的路径计算的目标为节能。
一种系统,包括路径计算客户端 PCC和路径计算单元 PCE ,其特征在于, 所述 PCC用于向 PCE发送路径计算请求的消息; 以及路径计算请求消息包 括节能信息。
可选的, 所述节能信息至少包括节能目标函数对象, 所述节能目标函 数对象用于描述所述 PCE的路径计算的目标为节能。
由于硬件技术和整机技术的限制, 单点设备节能的效果总是有限的。 采用本发明的技术方案, 从整网的角度进行网络级的节能, 可达到更好的 网络节能效果。
附图说明
图 1为现有技术中 PCE应用的示意图;
图 2为本发明实施例的方法的流程图; 图 3为本发明实施例所涉及的数据报文的示意图;
图 4为本发明实施例所涉及的数据报文的示意图;
图 5为本发明实施例所涉及的数据报文的示意图;
图 6为本发明实施例中的实施本发明的方法的装置示意图。
具体实施方式
为了使本发明实施例的目的、 技术方案及优点更加清楚明白, 以下结 合附图及实施例, 对本发明进行进一歩详细说明。 应当理解, 此处所描述 的具体实施例仅用以解释本发明, 并不用于限定本发明。
PCE (Path Computation Element) 是 多 协 议 标 签 交 换 MPLS (Multi-Protocol Label Switching) 网络的一种路径计算架构, 可以实 现基于各种约束条件的集中式路径计算。 PCEP 是用于路径计算客户端 PCC (Path Computation Client)与 PCE (Path Computation Element)之间进 行路径计算请求与应答通信的协议, 由 RFC5440进行描述。 RFC5541为 PCEP 引入了目标函数 Objective Fraction , 描述路径计算请求的特定目标。 RFC5557 则描述了基于 PCE 进行全局路径优化(Global Concurrent Optimization)的机制。
如图 1所示, 一个 PCE负责一个自治系统的路径计算和管理, 且每一 个 PCE 中存储有该网络中所有网络设备的拓扑连接关系和链路状态信息。 本发明实施例的方法可以由 PCE和 PCC实施, PCE可以包括在具有路径计算 功能的路由器或数据服务器中, PCC可以包括在自治系统中的路由器或网络 管理设备中。
实施例 1:
根据本发明的一个实施方式, 如图 2所示, 路径计算客户端 PCC201向 路径计算单元 PCE202发送路径计算请求 203。 路径计算请求 203包括节能 信息。 节能信息包括节能目标函数对象 204、 能耗相关的度量值对象 205、 总能耗上限信息 206和全局能耗限定目标 207。
根据本发明的一个实施方式,包含节能目标函数对象 204的报文如图 3 所示。对 PCEP协议进行如下扩展:定义新的目标函数码 Objective Function Code , 如图 3中的 OF Code (MEC) 字段, 需求描述为能耗最小化 Minimize Energy Consumpt ion (MEC)。 根据 PCEP协议, 使用一个新分配的 16比特 objective function identifier来标识路径计算的节能目标,该 Objective Function可在 PCReq和 PCRep中使用目标函数对象 OF (Object ive Function) Object携带, 描述对请求消息中所有路由的全局路径计算的目标是使能耗 最低。 PCReq为 PCC向 PCE发送的路径计算请求, PCRep为 PCE向 PCC发送 的路径计算响应。
根据本发明的一个实施方式, 包含能耗相关的度量值对象 205 的报文 如图 3所示。 在 PCEP协议报文中的度量值对象 (Metric Object ) 携带新 定义的度量值类型 (Metric Type ) : 累计能耗 Cumulative Energy Consumption, 并使用新分配的度量值类型码 Metric Type Code (如图 3, Metric Type Object中的 T字段)来标识。 能耗相关的度量值类型定义了描 述路径能耗的方式。
根据本发明的一个实施方式, 包含总能耗上限信息 206 的报文如图 3 所示。 在 PCEP协议报文中提供总能耗上限的置位标识。 如图 3中 B字段所 示, 当该标识置位时, 表示当前的路径计算请求消息为总能耗设置了上限 值, 如图 3中使用 metric-value值标识上限值, 该上限值表示了需要进行 计算的所有路径的总能耗上限值。 当标识 C置位时, 表明路径计算请求方 要求 PCE需在路径计算应答消息 PCRep中返回路径计算结果对应的总能耗, 使用如图 3中的 metric-value值标识计算得出的总能耗值。
根据本发明的一个实施方式, 全局能耗限定目标 207如图 5所示。 当 路径计算为全局路径计算时, 为全局限定目标 Global Constraints Object 定义新的 TLV (类型、长度和赋值):最大能耗( Max Energy Consumption ^ 该全局限定目标限定 PCE所有计算的路径中, 每条路径需符合的能耗上限。 该 TLV在 Global Constraints Object (如图 4 ) 中的 Optional TLV (s)字 段携带。具体而言,如图 5所示,该 TLV字段包括类型(Type )、长度(Length ) 禾口赋值 ( Energy Consumption Upper bound )。
可选的,在采用 PCE架构的网络中,路径计算单元 PCE可以在 PCEP OPEN 消息中通过目标函数列表 OF-List (Objective Function list) TLV列出该 PCE所支持的各种路径计算目标。 支持节能路径计算的 PCE可以在 OF-List TLV 中列出本发明定义的节能计算目标 "Minimize Energy Consumption (MEC) "。
图 6是实施本发明的方法的网络设备的一个简化的例子, 该网络设备 通过执行一系列的指令执行本发明的方法。 可选的, 该网络设备可以通过 例如网络连接与其它设备相连。 该网络设备可以按顺序或并行执行一系列 的指令。 此外, 尽管图 6中只展示了 1个网络设备, 但是应该理解 "设备" 可以解释为通过指令执行本发明的方法的单个设备或多个设备的集合。
网络设备 600包括一个处理器 602 (例如, CPU) , 处理器 602可以执行 计算、 选择或比较等功能。 主内存 604可以存储本发明的方法相关的参数, 例如, 节能目标函数对象 204、 能耗相关的度量值对象 205、 总能耗上限信 息 206和全局能耗限定目标 207等。 静态内存 606可以存储本发明的方法 的执行所需的指令等。上述处理器 602、主内存 604和静态内存 606通过总 线 608通信。 网络设备 600还可包括磁盘驱动器单元 616和网络接口装置 620。 磁盘驱动器单元 616也可以存储本发明的方法的执行所需的指令等。 网络接口装置 620可以使网络设备 600与外部通信, 例如, 发送路径计算 请求 203。
磁盘驱动器单元 616包括机器可读介质 622,机器可读介质 622存储一 个以上的指令和执行本发明的方法的数据结构 624 (例如, 软件)。 上述指 令可部分或全部的存储于主内存 604或处理器 602中。 指令和主内存 604 或处理器 602 也可以构成前述的机器可读介质。 此外, 前述指令可以通过 网络接口装置 620, 并利用现有通讯协议, 发送至或从网络端 626接收。
机器可读介质 622可包括存储指令的单介质或多介质 (例如, 集中或 分散式的数据库或与之相关的缓存)。 术语 "机器可读介质"也可理解为由 机器执行的任何可以实施本发明的方法的指令的存储、 编码或承载介质。 术语 "机器可读介质"也可理解为包括固态内存和光磁介质。
根据本发明的一个实施方式, 包括路径计算客户端 PCC 的网络设备如 图 2中 201所示。 该 PCC用于向路径计算单元 PCE发送路径计算请求消息 203。 路径计算请求消息 203至少包括节能目标函数对象 204, 节能目标函 数对象 204用于描述所述 PCE的路径计算的目标为节能。 路径计算请求的 消息 203还包括能耗相关的度量值对象 205、总能耗上限信息 206或全局能 耗限制目标 207中的一种或多种。 能耗相关的度量值对象 205用于定义描 述路径的能耗的方式。 总能耗上限信息 206定义了所述路径计算请求所允 许的总能耗上限。 全局能耗限制目标 207定义了 PCE在全局计算时任意路 径的能耗上限。
根据本发明的一个实施方式,包括路径计算单元 PCE的网络设备如图 2 中 202所示。 该 PCE用于接收来自路径计算客户端 PCC的路径计算请求消 息 203。 路径计算请求消息 203至少包括节能目标函数对象 204, 节能目标 函数对象 204用于描述所述 PCE的路径计算的目标为节能。 路径计算请求 的消息 203还包括能耗相关的度量值对象 205、总能耗上限信息 206或全局 能耗限制目标 207中的一种或多种。 能耗相关的度量值对象 205用于定义 描述路径的能耗的方式。 总能耗上限信息 206定义了路径计算请求所允许 的总能耗上限。 全局能耗限制目标 207定义了 PCE在全局计算时任意路径 的能耗上限。
根据本发明的一个实施方式, 实施本发明方法的系统如图 2所示。 该 系统包括路径计算客户端 PCC201和路径计算单元 PCE202。 PCC用于向 PCE 发送路径计算请求消息 203。该路径计算请求消息 203至少包括节能目标函 数对象 204,节能目标函数对象 204用于描述所述 PCE的路径计算的目标为 节能。路径计算请求的消息 203还包括能耗相关的度量值对象 205、 总能耗 上限信息 206或全局能耗限制目标 207中的一种或多种。 能耗相关的度量 值对象 205用于定义描述路径的能耗的方式。 总能耗上限信息 206定义了 路径计算请求所允许的总能耗上限。 全局能耗限制目标 207定义了 PCE在 全局计算时任意路径的能耗上限。
实施例 2:
根据本发明的一个实施方式, 路径计算客户端 PCC也可以请求进行某 条特定路径的节能路由计算, 即在当前的网络状态下, 为该路径计算较为 节能的路由。 例如, 在两次全局路径计算之间有新的业务流加入网络, 需 要 PCE计算路径。 为了避免为少量的新增业务流进行全局路径计算, 可以 选择在当前网络状态下只为该业务流进行进行节能路由计算, 这样计算的 结果可能并不是全局最节能路径, 但节省了全局节能优化所需的计算资源。
由 PCC向 PCE发送路径计算请求消息 PCReq,其中除包含标识该路径的 信息和对资源的约束条件之外, 还根据如下描述进行设置:
1) PCReq消息中将目标函数(Ob jective Function) Object 设置为: Minimize Energy Consumption , 即路径计算的目标是使该条路径带来的新 增能耗最低;
2) PCReq 消息中可携带类型为 Cumulative Energy Consumption 的 Metric Object , 其中当 B (Bound)标记置位时, Metric-Value字段标识该 路径允许的能耗上限; 而当 C (Computed Metric)标记置位时, 表示请求 PCE 在 PCRep消息中返回计算得出的路径能耗;
PCE在收到包含节能计算相关参数的该 PCReq消息后,根据其中携带的 节能目标和能耗约束条件进行路径计算, 得出节能路径。 本领域普通技术 人员可以理解, 现有技术中采用的基于约束条件的路径计算算法, 适用于 本发明的 PCE , 本专利申请中不再一一进行描述。
通过以上的实施方式的描述, 本领域的普通技术人员可以清楚地了解 到本发明实施例可借助软件加必需的通用硬件平台的方式来实现, 当然也 可以通过硬件来实现。 基于这样的理解, 本发明实施例的技术方案可以以 软件产品的形式体现出来, 该计算机软件产品可以存储在存储介质中, 如 ROM/RAM, 磁碟、 光盘等, 包括若干指令用以使得一台计算机设备、 或者服 务器、 或者其他网络设备执行本发明各个实施例或者实施例的某些部分所 述的方法。
以上仅为本发明的较佳实施例, 并非用于限定本发明的保护范围。 凡 在本发明的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应 包含在本发明的保护范围之内。

Claims

权利要求
1、 一种路由相关的节能方法, 其特征在于, 包括:
路径计算客户端 PCC向路径计算单元 PCE发送路径计算请求消息; 以及
所述路径计算请求消息包括节能信息。
2、 根据权利要求 1所述的方法, 其特征在于, 所述节能信息包括节能 目标函数对象, 所述节能目标函数对象用于描述所述 PCE 的路径计算的目 标为节能。
3、 根据权利要求 1所述的方法, 其特征在于, 所述节能信息还包括能 耗相关的度量值对象, 所述能耗相关的度量值对象用于定义描述路径的能 耗的方式。
4、 根据权利要求 1或 2所述的方法, 其特征在于, 所述节能信息还包 括总能耗上限信息, 所述总能耗上限信息定义了所述路径计算请求所允许 的总能耗上限。
5、 根据权利要求 1或 2所述的方法, 其特征在于, 所述节能信息还包 括全局能耗限制目标, 所述全局能耗限制目标定义了所述 PCE在全局计算 时任意路径的能耗上限。
6、 一种网络设备, 包括路径计算客户端 PCC , 其特征在于所述 PCC用 于:
向路径计算单元 PCE发送路径计算请求消息; 以及
所述路径计算请求消息包括节能信息。
7、 根据权利要求 6的网络设备, 所述节能信息至少包括节能目标函数 对象, 所述节能目标函数对象用于描述所述 PCE的路径计算的目标为节能。
8、 根据权利要求 6或 7所述的设备, 其特征在于节能信息还包括能耗 相关的度量值对象、 总能耗上限信息或全局能耗限制目标中的至少一种; 所述能耗相关的度量值对象用于定义描述路径的能耗的方式; 所述总能耗上限信息定义了所述路径计算请求所允许的总能耗上限; 以及 所述全局能耗限制目标定义了所述 PCE在全局计算时任意路径的能耗 上限。
9、 一种网络设备, 包括路径计算单元 PCE, 其特征在于所述 PCE用于: 接收来自路径计算客户端 PCC的路径计算请求消息; 以及
所述路径计算请求消息包括节能信息。
10、 根据权利要求 9 的网络设备, 所述节能信息至少包括节能目标函 数对象, 所述节能目标函数对象用于描述所述 PCE 的路径计算的目标为节 能。
11、 根据权利要求 9或 10所述的设备, 其特征在于路径计算请求的消 息还包括能耗相关的度量值对象、 总能耗上限信息或全局能耗限制目标中 的至少一种; 所述能耗相关的度量值对象用于定义描述路径的能耗的方式; 所述总能耗上限信息定义了所述路径计算请求所允许的总能耗上限; 以及
所述全局能耗限制目标定义了所述 PCE在全局计算时任意路径的能耗 上限。
12、 一种系统, 包括路径计算客户端 PCC和路径计算单元 PCE , 其特征 在于, 所述 PCC用于向 PCE发送路径计算请求消息; 所述 PCE用于接收来 自所述 PCC的路径计算请求消息, 以及
所述路径计算请求消息包括节能信息。
13、 根据权利要求 12的系统, 所述节能信息至少包括节能目标函数对 象, 所述节能目标函数对象用于描述所述 PCE的路径计算的目标为节能。
14、 根据权利要求 12或 13所述的系统, 其特征在于路径计算请求的 消息还包括能耗相关的度量值对象、 总能耗上限信息或全局能耗限制目标 中的至少一种; 所述能耗相关的度量值对象用于定义描述路径的能耗的方式; 所述总能耗上限信息定义了所述路径计算请求所允许的总能耗上限; 以及 所述全局能耗限制目标定义了所述 PCE在全局计算时任意路径的能耗 上限。
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