WO2018033151A1 - 一种网络传输加速方法及装置 - Google Patents

一种网络传输加速方法及装置 Download PDF

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WO2018033151A1
WO2018033151A1 PCT/CN2017/098150 CN2017098150W WO2018033151A1 WO 2018033151 A1 WO2018033151 A1 WO 2018033151A1 CN 2017098150 W CN2017098150 W CN 2017098150W WO 2018033151 A1 WO2018033151 A1 WO 2018033151A1
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network
node
tandem
request
server
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PCT/CN2017/098150
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English (en)
French (fr)
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葛媛媛
熊勤
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中兴通讯股份有限公司
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    • 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
    • H04L47/76—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
    • H04L47/762—Admission control; Resource allocation using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions triggered by the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/63—Routing a service request depending on the request content or context

Definitions

  • This document relates to, but is not limited to, the field of communications and computers, and in particular, to a network transmission acceleration method and apparatus.
  • a plurality of media servers are generally used to form a content delivery network to provide services for end users, and multiple nodes are hierarchically distributed, and each user is designated to provide a service node; When a service cannot be provided on its home node, it needs to be able to connect to other service nodes that have the content.
  • SDN Software Defined Network
  • the logically centralized control layer can support the flexible scheduling of network resources.
  • the flexible open interface can support the on-demand calling of network capabilities.
  • the unified southbound interface enables virtual transparency of network devices. This helps SDN to change the static state of the network and is consistent with the dynamic trend represented by the server field. Its core concept separates the control plane of the network from the forwarding plane and supports global software control, thus achieving flexible control of the network and powerfully providing a good platform for innovation of core networks and applications.
  • the embodiment of the invention provides a network transmission acceleration method and device, which utilizes the SDN technology to help the CDN network realize the fast convergence service of the multimedia system and reduce the transmission pressure of the backbone network, thereby improving The stability of CDN network transmission and transmission efficiency ensure the quality of service.
  • a network transmission acceleration method is provided, where the method includes:
  • the tandem node Receiving an acceleration request for accelerating network transmission between the client and the tandem node sent by the content distribution network CDN server, wherein the acceleration request carries information for calculating a transmission path and a network bandwidth resource, where the tandem node is Determining, by the CDN server, a dependent service node determined according to a preset algorithm according to a received tandem request initiated by the serving node;
  • the OpenFlow OpenFlow protocol is used to adjust the network topology and bandwidth resources of the network.
  • another network transmission acceleration method is further provided, where the method includes:
  • the preset algorithm includes a load balancing algorithm.
  • a network transmission acceleration apparatus is further provided, where the apparatus includes:
  • the first receiving module is configured to receive an acceleration request for accelerating network transmission between the client and the tandem node sent by the content distribution network CDN server, where the acceleration request carries information for calculating a transmission path and a network bandwidth resource,
  • the tandem node is a dependent service node determined by the CDN server according to a preset bridging request initiated by the CDN server according to a preset algorithm;
  • a calculation module configured to calculate a transmission path and a network bandwidth resource according to the information according to a preset algorithm
  • the adjusting module is configured to dynamically adjust a network topology structure and a bandwidth resource of the network according to the calculated transmission path and network bandwidth resources;
  • the first sending module is configured to send a response message to the CDN server to complete network topology and bandwidth resource adjustment.
  • the adjusting module is configured to adjust a network topology and a bandwidth resource of the network by using an OpenFlow OpenFlow protocol.
  • another network transmission acceleration apparatus comprising:
  • a second receiving module configured to receive a tandem request initiated by the serving node
  • Determining a module configured to determine a dependent service node as a tandem node according to a preset algorithm
  • a second sending module configured to send an acceleration request for accelerating network transmission between the client and the tandem node to the software-defined network SDN server, where the acceleration request carries information for calculating a transmission path and a network bandwidth resource ;
  • the forwarding module is configured to receive a response message that completes the network topology and bandwidth resource adjustment sent by the SDN server, and forwards the response message to the serving node.
  • the apparatus further includes a third receiving module, configured to receive a tandem request initiated by the serving node after processing the media service request according to a preset processing scheme, where the media service request is The service node receives from the client.
  • a third receiving module configured to receive a tandem request initiated by the serving node after processing the media service request according to a preset processing scheme, where the media service request is The service node receives from the client.
  • another network transmission acceleration system comprising: a media server, a content definition network CDN server, and a software definition network.
  • Network SDN server where
  • the media server is configured to receive a media service request initiated by the client, and after processing the media service request according to a preset processing scheme, initiate a tandem request to the CDN server;
  • the CDN server is configured to receive the tandem request, determine a dependent service node as a tandem node according to a preset algorithm, and send an accelerated network transmission between the client and the tandem node to the SDN server.
  • the acceleration request wherein the acceleration request carries information for calculating a transmission path and a network bandwidth resource, the tandem node is a tandem request initiated by the CDN server according to the received service node; and receiving from the SDN a response message of the server (73), and forwarding the response message to the service node;
  • the SDN server is configured to receive the acceleration request, and determine a transmission path and a network bandwidth resource according to a preset algorithm according to a preset algorithm; The calculated transmission path and network bandwidth resources dynamically adjust the network topology and bandwidth resources of the network; and send a response message to complete the network topology and bandwidth resource adjustment to the CDN server.
  • the embodiment of the invention realizes the fast tandem service of the multimedia system by using the SDN technology and reduces the transmission pressure of the backbone network, thereby greatly improving the network transmission speed and the stability of the data transmission.
  • FIG. 1 is a flow chart 1 of a network transmission acceleration method according to an embodiment of the present invention.
  • FIG. 2 is a second flowchart of a network transmission acceleration method according to an embodiment of the present invention.
  • FIG. 3 is a block diagram 1 of a network transmission acceleration apparatus according to an embodiment of the present invention.
  • FIG. 4 is a block diagram 2 of a network transmission acceleration apparatus according to an embodiment of the present invention.
  • FIG. 5 is a system architecture diagram of an alternative embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a network transmission acceleration method according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a network transmission acceleration system according to an embodiment of the present invention.
  • FIG. 1 is a flowchart 1 of a network transmission acceleration method according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:
  • S102 Receive an acceleration request for network transmission between a client and a tandem node sent by a content distribution network CDN server, where the acceleration request carries information for calculating a transmission path and a network bandwidth resource, where the tandem node is the CDN
  • the server determines a dependent service node according to the preset algorithm according to the received tandem request initiated by the service node;
  • S104 Calculate a transmission path and a network bandwidth resource according to the preset algorithm according to the information
  • S106 Dynamically adjust network topology and bandwidth resources of the network according to the calculated transmission path and network bandwidth resources;
  • S108 Send a response message to complete the network topology and bandwidth resource adjustment to the CDN server.
  • the SDN technology is used to help the CDN network realize the fast convergence service of the multimedia system and reduce the transmission pressure of the backbone network, improve the stability of the transmission of the CDN network, and the transmission efficiency, so that the service quality is guaranteed.
  • the CDN server and the multimedia in the CDN network The service nodes use the Transmission Control Protocol (TCP) protocol to establish channels, and the CDN server and the SDN server use the TCP protocol to establish channels.
  • TCP Transmission Control Protocol
  • Each SDN server uses the HyperText Transfer Protocol (HTTP) protocol to pass the protocol.
  • Northbound interface communication; topology management, traffic management, and message transmission between the SDN server and network devices and switches adopt the standard southbound interface protocol (OpenFlow protocol).
  • FIG. 2 is a flowchart 2 of a network transmission acceleration method according to an embodiment of the present invention, where the method includes:
  • S202 Receive a tandem request initiated by the service node.
  • S204 Determine, according to a preset algorithm, a dependent service node as a tandem node;
  • S206 Send an acceleration request for accelerating network transmission between the client and the tandem node to the software-defined network SDN server, where the acceleration request carries information for calculating a transmission path and a network bandwidth resource;
  • S208 Receive a response message that completes the network topology and bandwidth resource adjustment sent by the SDN server, and forwards the response message to the service node.
  • the preset algorithm includes a load balancing algorithm.
  • the pre-set algorithm is a load balancing algorithm which is only one of the alternative embodiments, and other conventional algorithms as those skilled in the art are also included in the present invention.
  • FIG. 3 is a block diagram of a network transmission acceleration device according to an embodiment of the present invention. As shown in FIG. 3, the device includes:
  • the first receiving module 32 is configured to receive an acceleration request for accelerating network transmission between the client and the tandem node sent by the content distribution network CDN server, where the acceleration request carries information for calculating a transmission path and a network bandwidth resource
  • the tandem node is a dependent service node determined by the CDN server according to the received tandem request initiated by the serving node, and the computing module 34 is configured to calculate the transmission path according to the preset algorithm according to the information.
  • the network bandwidth resource; the adjusting module 36 is configured to dynamically adjust the network topology and the bandwidth resource of the network according to the calculated transmission path and the network bandwidth resource;
  • the first sending module 38 is configured to send the completed network topology to the CDN server and Response message for bandwidth resource adjustment.
  • the adjusting module is further configured to adjust a network topology and a bandwidth resource of the network by using an OpenFlow OpenFlow protocol.
  • FIG. 4 is a block diagram 2 of a network transmission acceleration device according to an embodiment of the present invention. As shown in FIG. 4, the device includes:
  • the second receiving module 42 is configured to receive a tandem request initiated by the serving node, and the determining module 40 is configured to determine, according to a preset algorithm, a dependent service node as a tandem node;
  • the sending module 44 is configured to send an acceleration request for accelerating network transmission between the client and the tandem node to the software-defined network SDN server, where the acceleration request carries information for calculating a transmission path and a network bandwidth resource;
  • the forwarding module 46 configured to receive a response message that completes the network topology and bandwidth resource adjustment sent by the SDN server, and forwards the response message to the service node;
  • the third receiving module 48 is configured to receive the service node according to a preset processing scheme.
  • the embodiment of the present invention further provides another network transmission acceleration system.
  • the system includes: a media server 71, a content definition network CDN server 72, and a software defined network SDN server 73, where
  • the media server 71 is configured to receive a media service request initiated by the client, and after processing the media service request according to a preset processing scheme, initiate a tandem request to the CDN server 72.
  • the CDN server 72 is configured to receive the tandem request, determine a dependent service node as a tandem node according to a preset algorithm, and send an acceleration request for accelerating network transmission between the client and the tandem node to the SDN server 73.
  • the acceleration request carries information for calculating a transmission path and a network bandwidth resource, and the tandem node is a tandem request initiated by the CDN server 72 according to the received service node;
  • the SDN server 73 is configured to receive the acceleration request, and determine a transmission path and a network bandwidth resource according to a preset algorithm according to a preset algorithm; and calculate a transmission path and a network bandwidth resource according to the preset information; The transmission path and the network bandwidth resource dynamically adjust the network topology and bandwidth resources of the network; send a response message to the CDN server 72 to complete the network topology and bandwidth resource adjustment;
  • the CDN server 72 is further configured to receive the response message and forward the response message to the service node.
  • FIG. 5 is a system architecture diagram of an optional embodiment of the present invention. As shown in FIG. 5, the system includes: a CDN. Server, SDN server and multimedia service node, wherein the SDN server can be divided into an SDN adaptation module and an SDN control module according to functions, and each of the following The module is briefly described.
  • CDN Server Set up to establish a transport channel with the multimedia service node, while managing the status of the service node and processing each service request.
  • the SDN adaptation module is configured to process the service request of the CDN management module, adapt the existing interface of the CDN server to the northbound interface of the SDN network control module, and notify the SDN control module.
  • SDN network control module set to deploy the network's business policy, topology management, traffic management, and has nothing to do with the underlying hardware devices in the network; can make reasonable resource allocation decisions according to the global network view, thus achieving different services at the application level demand.
  • the SDN network control module abstracts the underlying physical network components such as switches, routers, firewalls, etc., and transforms the network programming mode from distributed mode to centralized mode.
  • Multimedia Service Node Set to store content and provide multimedia services.
  • FIG. 6 is a schematic diagram of a network transmission acceleration method according to an embodiment of the present invention. As shown in FIG. 6, the method includes:
  • a link is established between the CDN server and the multimedia service node, and is responsible for managing the multimedia service node and processing the service request.
  • the CDN server receives the tandem request of the multimedia service node, and selects the service node with the best performance of the node according to the load balancing algorithm.
  • the CDN management module initiates a tandem transmission acceleration request to the SDN adaptation module to request content transmission acceleration of the user and the tandem service node.
  • the SDN adaptation module receives the request, converts the existing interface into a programmable northbound interface of the SDN control module, and notifies the SDN control module.
  • the SDN control module automatically calculates an optimal transmission path between the user STB IP and the network device of the tandem service node according to the request, and then passes the SDN south to the standard interface according to the monitoring condition of the network bandwidth resource ( OpenFlow protocol) Optimal dynamic adjustment of network topology and bandwidth resources. After completing the above actions, the SDN control module returns a request acceleration response to the SDN adaptation module through the SDN northbound interface.
  • OpenFlow protocol OpenFlow protocol
  • the SDN adaptation module converts the northbound interface to the existing interface protocol of the CDN management module, and then returns a request transmission acceleration response to the CDN management module.
  • the CDN management module After receiving the request transmission acceleration response, the CDN management module returns the sink to the requesting node. Pick up the service node.
  • S616 The requested node returns the tandem service node to the user STB set top box.
  • S618 The user starts to initiate a media content playing service to the tandem service node.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented by the processor to implement the method described in the foregoing embodiments.
  • Computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules, or other data. , removable and non-removable media.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer.
  • communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media.
  • the foregoing embodiment implements the fast tandem service of the multimedia system by using the SDN technology and reduces the transmission pressure of the backbone network, thereby greatly improving the network transmission speed and the stability of data transmission.

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Abstract

一种网络传输加速方法，该方法包括：接收内容分发网络CDN服务器发送的客户端与汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息，所述汇接节点是所述CDN服务器依据接收到的服务节点发起的汇接请求，根据预先设置的算法确定的一个依赖服务节点(S102)；根据所述信息按照预先设置的算法计算出传输路径及网络带宽资源(S104)；根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源(S106)；向所述CDN服务器发送完成网络拓扑及带宽资源调整的响应消息(S108)。

Description

一种网络传输加速方法及装置 技术领域
本文涉及但不限于通信和计算机领域，特别涉及一种网络传输加速方法及装置。
背景技术
在多媒体业务系统中，通常采用多个媒体服务器(节点)组成内容分发网络(Content Delivery Network)为终端用户提供服务，多个节点采用层级分布，并为每个用户指定提供服务的节点；当用户在其归属节点上不能提供服务时，需要能够汇接到有该内容的其它服务节点上。
然而随着终端用户和节点数量成几何数量级的快速增长，及内容存储容量的增加，用户对于视频服务的快速响应、流畅性要求越来越高，进而要求快速的实现多媒体系统快速汇接服务及减轻骨干网络传输压力。
软件定义网络(Software Defined Network,SDN)，是目前一种新型网络创新架构和技术，逻辑上集中的控制层面能够支持网络资源的灵活调度，灵活的开放接口能够支持网络能力的按需调用，标准统一的南向接口能够实现网络设备的虚拟透明。这都有助于SDN去改变网络的静态化现状，并与以服务器领域为代表的动态化趋势相吻合。其核心理念将网络的控制平面与转发平面分离、支持全局的软件控制，从而实现网络的灵活控制，能够有力地为核心网络及应用的创新提供良好的平台。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例提供了一种网络传输加速方法及装置，利用SDN技术帮助CDN网络实现多媒体系统快速汇接服务及减轻骨干网络传输压力，提高 了CDN网络传输的稳定性，以及传输效率，使服务质量得到了保证。根据本发明实施例的一方面，提供了一种网络传输加速方法，该方法包括：
接收内容分发网络CDN服务器发送的客户端与汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息，所述汇接节点是所述CDN服务器依据接收到的服务节点发起的汇接请求，根据预先设置的算法确定的一个依赖服务节点；
根据所述信息按照预先设置的算法计算出传输路径及网络带宽资源；
根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；
向所述CDN服务器发送完成网络拓扑及带宽资源调整的响应消息。
可选地，采用开放流OpenFlow协议调整网络的网络拓扑结构及带宽资源。
根据本发明实施例的另一方面，还提供了另外一网络传输加速方法，该方法包括：
接收到服务节点发起的汇接请求；
根据预先设置的算法确定一个依赖服务节点为汇接节点；
向软件定义网络SDN服务器发送客户端与所述汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息；
接收所述SDN服务器发送的完成网络拓扑及带宽资源调整的响应消息，并将所述响应消息转发给所述服务节点。
可选地，接收所述服务节点根据预先设置的处理方案对媒体服务请求进行处理之后发起的汇接请求，其中，所述媒体服务请求是所述服务节点从客户端接收的。
可选地，所述预先设置的算法包括负载均衡算法。
根据本发明实施例的另一方面，还提供了一种网络传输加速装置，该装置包括：
第一接收模块，设置为接收内容分发网络CDN服务器发送的客户端与汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息，所述汇接节点是所述CDN服务器依据接收到的服务节点发起的汇接请求，根据预先设置的算法确定的一个依赖服务节点；
计算模块，设置为根据所述信息按照预先设置的算法计算出传输路径及网络带宽资源；
调整模块，设置为根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；
第一发送模块，设置为向所述CDN服务器发送完成网络拓扑及带宽资源调整的响应消息。
可选地，所述调整模块，是设置为采用开放流OpenFlow协议调整网络的网络拓扑结构及带宽资源。
根据本发明实施例的另一方面，还提供了另外一种网络传输加速装置，该装置包括：
第二接收模块，设置为接收到服务节点发起的汇接请求；
确定模块，设置为根据预先设置的算法确定一个依赖服务节点为汇接节点；
第二发送模块，设置为向软件定义网络SDN服务器发送客户端与所述汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息；
转发模块，设置为接收所述SDN服务器发送的完成网络拓扑及带宽资源调整的响应消息，并将所述响应消息转发给所述服务节点。
可选地，所述装置还包括第三接收模块，设置为接收所述服务节点根据预先设置的处理方案对媒体服务请求进行处理之后发起的汇接请求，其中，所述媒体服务请求是所述服务节点从客户端接收的。
根据本发明实施例的另一方面，还提供了另外一种网络传输加速系统，该系统包括：包括：媒体服务器、内容定义网络CDN服务器和软件定义网 络SDN服务器，其中，
所述媒体服务器，设置为接收所述客户端发起的媒体服务请求，根据预先设置的处理方案对所述媒体服务请求进行处理后，向所述CDN服务器发起汇接请求；
所述CDN服务器，设置为接收所述汇接请求，根据预先设置的算法确定一个依赖服务节点为汇接节点；向所述SDN服务器发送所述客户端与所述汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息，所述汇接节点是所述CDN服务器依据接收到的服务节点发起的汇接请求；以及接收来自SDN服务器(73)的响应消息，并将所述响应消息转发给所述服务节点；
所述SDN服务器，设置为接收所述加速请求，根据预先设置的算法确定的一个依赖服务节点；根据所述加速请求中携带的信息按照预先设置的算法计算出传输路径及网络带宽资源；根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；向所述CDN服务器发送完成网络拓扑及带宽资源调整的响应消息。
本发明实施例借助SDN技术实现多媒体系统快速汇接服务及减轻骨干网络传输压力，大幅度提高网络传输速度，和数据传输的稳定性。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1是根据本发明实施例的网络传输加速方法流程图一；
图2是根据本发明实施例的网络传输加速方法流程图二；
图3是根据本发明实施例的网络传输加速装置结构框图一；
图4是根据本发明实施例的网络传输加速装置结构框图二；
图5是本发明可选实施例的系统架构图；
图6是本发明实施例的一种网络传输加速方法的示意图；
图7是根据本发明实施例的网络传输加速系统结构框图。
本发明的实施方式
下文中将参考附图并结合实施例来详细说明本发明。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
本发明实施例提供了一种网络地址转换方法，图1是根据本发明实施例的网络传输加速方法流程图一，如图1所示，该方法包括：
S102：接收内容分发网络CDN服务器发送的客户端与汇接节点间的网络传输的加速请求，其中，该加速请求中携带有用于计算传输路径及网络带宽资源的信息，该汇接节点是该CDN服务器依据接收到的服务节点发起的汇接请求，根据预先设置的算法确定的一个依赖服务节点；
S104：根据该信息按照预先设置的算法计算出传输路径及网络带宽资源；
S106：根据该计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；
S108：向该CDN服务器发送完成网络拓扑及带宽资源调整的响应消息。
通过上述步骤，利用SDN技术帮助CDN网络实现多媒体系统快速汇接服务及减轻骨干网络传输压力，提高了CDN网络传输的稳定性，以及传输效率，使服务质量得到了保证CDN网络中CDN服务器与多媒体服务节点之间采用传输控制协议(Transmission Control Protocol，TCP)协议建立通道、CDN服务器与SDN服务器采用TCP协议建立通道；每个SDN服务器之间采用超文本传输协议(HyperText Transfer Protocol，HTTP)协议通过北向接口通信；SDN服务器与网络设备、交换机之间的拓扑管理、流量管理、消息发送采用标准的南向接口协议(OpenFlow协议)。
本发明实施例还提供了另外一网络传输加速方法，图2是根据本发明实施例的网络传输加速方法流程图二，该方法包括：
S202：接收服务节点发起的汇接请求；
S204：根据预先设置的算法确定一个依赖服务节点为汇接节点；
S206：向软件定义网络SDN服务器发送客户端与该汇接节点间的加速网络传输的加速请求，其中，该加速请求中携带有用于计算传输路径及网络带宽资源的信息；
S208：接收该SDN服务器发送的完成网络拓扑及带宽资源调整的响应消息，并将该响应消息转发给该服务节点。
可选地，接收该服务节点根据预先设置的处理方案对媒体服务请求进行处理之后发起的汇接请求，其中，该媒体服务请求是该服务节点从客户端接收的。
可选地，该预先设置的算法包括负载均衡算法。当然预先设置的算法为负载均衡算法仅仅是可选实施例中的一种，作为本领域技术人员的其他常规算法也包含在本发明内。
本发明实施例还提供了一种网络传输加速装置，图3是根据本发明实施例的网络传输加速装置结构框图一，如图3所示，该装置包括：
第一接收模块32，设置为接收内容分发网络CDN服务器发送的客户端与汇接节点间的加速网络传输的加速请求，其中，该加速请求中携带有用于计算传输路径及网络带宽资源的信息，该汇接节点是该CDN服务器依据接收到的服务节点发起的汇接请求，根据预先设置的算法确定的一个依赖服务节点；计算模块34，设置为根据该信息按照预先设置的算法计算出传输路径及网络带宽资源；调整模块36，设置为根据该计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；第一发送模块38，设置为向该CDN服务器发送完成网络拓扑及带宽资源调整的响应消息。
可选地，该调整模块，还设置为采用开放流OpenFlow协议调整网络的网络拓扑结构及带宽资源。
本发明实施例还提供了另外一种网络传输加速装置，图4是根据本发明实施例的网络传输加速装置结构框图二，如图4所示，该装置包括：
第二接收模块42，设置为接收到服务节点发起的汇接请求；确定模块40，设置为根据预先设置的算法确定一个依赖服务节点为汇接节点；第二发 送模块44，设置为向软件定义网络SDN服务器发送客户端与该汇接节点间的加速网络传输的加速请求，其中，该加速请求中携带有用于计算传输路径及网络带宽资源的信息；转发模块46，设置为接收该SDN服务器发送的完成网络拓扑及带宽资源调整的响应消息，并将该响应消息转发给该服务节点；第三接收模块48，设置为接收该服务节点根据预先设置的处理方案对媒体服务请求进行处理之后发起的汇接请求，其中，该媒体服务请求是该服务节点从客户端接收的。
本发明实施例还提供了另外一种网络传输加速系统，如图7所示，该系统包括：媒体服务器71、内容定义网络CDN服务器72和软件定义网络SDN服务器73，其中，
该媒体服务器71，设置为接收该客户端发起的媒体服务请求，根据预先设置的处理方案对该媒体服务请求进行处理后，向该CDN服务器72发起汇接请求；
该CDN服务器72，设置为接收该汇接请求，根据预先设置的算法确定一个依赖服务节点为汇接节点；向该SDN服务器73发送该客户端与该汇接节点间的加速网络传输的加速请求，其中，该加速请求中携带有用于计算传输路径及网络带宽资源的信息，该汇接节点是该CDN服务器72依据接收到的服务节点发起的汇接请求；
该SDN服务器73，设置为接收该加速请求，根据预先设置的算法确定的一个依赖服务节点；根据该加速请求中携带的信息按照预先设置的算法计算出传输路径及网络带宽资源；根据该计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；向该CDN服务器72发送完成网络拓扑及带宽资源调整的响应消息；
该CDN服务器72，还设置为接收该响应消息，并将该响应消息转发给该服务节点。
本发明实施例提供了一种多媒体业务系统中基于SDN网络技术提升多媒体快速汇接服务的系统，图5是本发明可选实施例的系统架构图，如图5所示，该系统包括：CDN服务器、SDN服务器和多媒体服务节点，其中，SDN服务器可以按照功能分为SDN适配模块、SDN控制模块，下面对每个 模块进行简要说明。
CDN服务器：设置为与多媒体服务节点建立传输通道，同时管理服务节点的状态以及处理每种业务请求。
SDN适配模块：设置为处理CDN管理模块的业务请求，将CDN服务器现有接口适配成SDN网络控制模块的北向接口，并通知SDN控制模块。
SDN网络控制模块：设置为部署网络的业务策略、拓扑管理、流量管理，而与网络中的底层硬件设备无关；能够根据全局的网络视图做出合理的资源调配决策，从而实现应用层面不同的业务需求。
SDN网络控制模块将底层的物理网络组件如交换机、路由器、防火墙等设备都做了抽象，并将网络编程模式从分布模式转变成了集中模式。
多媒体服务节点：设置为存储内容，提供多媒体服务。
图6是本发明实施例的一种网络传输加速方法的示意图，如图6所示，该方法包括：
S602:CDN服务器与多媒体服务节点之间建立链路，负责管理多媒体服务节点，并处理业务请求。
S604-S606:CDN服务器收到多媒体服务节点的汇接请求，根据负载均衡算法，选取该节点的性能最优的依赖服务节点。CDN管理模块向SDN适配模块发起汇接传输加速请求，请求用户与汇接服务节点的内容传输加速。
S608:SDN适配模块收到请求，将现有接口转换成SDN控制模块可编程的北向接口，并通知SDN控制模块
S610:SDN控制模块根据请求中的用户STB IP与汇接服务节点的网络设备，自动计算出两者之间最佳的传输路径，然后根据网络带宽资源的监控情况，通过SDN南向标准接口(OpenFlow协议)对网络拓扑结构及带宽资源进行最优的动态调整。SDN控制模块完成上述动作之后，通过SDN北向接口向SDN适配模块返回请求加速响应。
S612:SDN适配模块将北向接口转换CDN管理模块的现有接口协议，然后给CDN管理模块返回请求传输加速响应。
S614:CDN管理模块收到请求传输加速响应之后，给请求节点返回该汇 接服务节点。
S616:所请求节点将汇接服务节点返回给用户STB机顶盒。
S618：用户开始向汇接服务节点发起媒体内容播放服务。
本发明实施例还提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现上述实施例所述的方法。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理单元的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些组件或所有组件可以被实施为由处理器，如数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。以上所述仅为本发明的可选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有多种更改和变化。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。
工业实用性
上述实施例借助SDN技术实现多媒体系统快速汇接服务及减轻骨干网络传输压力，大幅度提高网络传输速度，和数据传输的稳定性。

Claims (12)

  1. 一种网络传输加速方法，包括：
    接收内容分发网络CDN服务器发送的客户端与汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息，所述汇接节点是所述CDN服务器依据接收到的服务节点发起的汇接请求，根据预先设置的算法确定的一个依赖服务节点(S102)；
    根据所述信息按照预先设置的算法计算出传输路径及网络带宽资源(S104)；
    根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源(S106)；
    向所述CDN服务器发送完成网络拓扑及带宽资源调整的响应消息(S108)。
  2. 根据权利要求1所述的方法，其中，根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源(S106)包括：
    采用开放流OpenFlow协议调整网络的网络拓扑结构及带宽资源。
  3. 一种网络传输加速方法，所述方法包括：
    接收到服务节点发起的汇接请求(S202)；
    根据预先设置的算法确定一个依赖服务节点为汇接节点(S204)；
    向软件定义网络SDN服务器发送客户端与所述汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息(S206)；
    接收所述SDN服务器发送的完成网络拓扑及带宽资源调整的响应消息，并将所述响应消息转发给所述服务节点(S208)。
  4. 根据权利要求3所述的方法，所述方法还包括：
    接收服务节点发起的汇接请求,根据预先设置的算法确定一个依赖服务节点为汇接节点之前，接收所述服务节点根据预先设置的处理方案对媒体服务请求进行处理之后发起的汇接请求，其中，所述媒体服务请求是所述服 务节点从客户端接收的。
  5. 根据权利要求3所述的方法，其中：
    所述预先设置的算法包括负载均衡算法。
  6. 一种网络传输加速装置，包括：
    第一接收模块(32)，设置为接收内容分发网络CDN服务器发送的客户端与汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息，所述汇接节点是所述CDN服务器依据接收到的服务节点发起的汇接请求，根据预先设置的算法确定的一个依赖服务节点；
    计算模块(34)，设置为根据所述信息按照预先设置的算法计算出传输路径及网络带宽资源；
    调整模块(36)，设置为根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；
    第一发送模块(38)，设置为向所述CDN服务器发送完成网络拓扑及带宽资源调整的响应消息。
  7. 根据权利要求6所述的装置，其中，
    所述调整模块，是设置为通过如下方式实现根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源：采用开放流OpenFlow协议调整网络的网络拓扑结构及带宽资源。
  8. 一种网络传输加速装置，包括：
    第二接收模块(42)，设置为接收到服务节点发起的汇接请求；
    确定模块(40)，设置为根据预先设置的算法确定一个依赖服务节点为汇接节点；
    第二发送模块(44)，设置为向软件定义网络SDN服务器发送客户端与所述汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息；
    转发模块(46)，设置为接收所述SDN服务器发送的完成网络拓扑及 带宽资源调整的响应消息，并将所述响应消息转发给所述服务节点。
  9. 根据权利要求8所述的装置，所述装置还包括：
    第三接收模块(48)，设置为接收所述服务节点根据预先设置的处理方案对媒体服务请求进行处理之后发起的汇接请求，其中，所述媒体服务请求是所述服务节点从客户端接收的。
  10. 一种网络传输加速系统，包括：媒体服务器(71)、内容定义网络CDN服务器(72)和软件定义网络SDN服务器(73)，其中，
    所述媒体服务器(71)，设置为接收所述客户端发起的媒体服务请求，根据预先设置的处理方案对所述媒体服务请求进行处理后，向所述CDN服务器(72)发起汇接请求；
    所述CDN服务器(72)，设置为接收所述汇接请求，根据预先设置的算法确定一个依赖服务节点为汇接节点；向所述SDN服务器(73)发送所述客户端与所述汇接节点间的加速网络传输的加速请求，其中，所述加速请求中携带有用于计算传输路径及网络带宽资源的信息，所述汇接节点是所述CDN服务器(72)依据接收到的服务节点发起的汇接请求；以及接收来自SDN服务器(73)的响应消息，并将所述响应消息转发给所述服务节点；
    所述SDN服务器(73)，设置为接收所述加速请求，根据预先设置的算法确定的一个依赖服务节点；根据所述加速请求中携带的信息按照预先设置的算法计算出传输路径及网络带宽资源；根据所述计算出的传输路径及网络带宽资源动态调整网络的网络拓扑结构及带宽资源；向所述CDN服务器(72)发送完成网络拓扑及带宽资源调整的响应消息。
  11. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现权利要求1或2所述的方法。
  12. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现权利要求3或4或5所述的方法。
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