WO2008074207A1 - Système de transmission de données et procédé correspondant - Google Patents

Système de transmission de données et procédé correspondant Download PDF

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Publication number
WO2008074207A1
WO2008074207A1 PCT/CN2007/002788 CN2007002788W WO2008074207A1 WO 2008074207 A1 WO2008074207 A1 WO 2008074207A1 CN 2007002788 W CN2007002788 W CN 2007002788W WO 2008074207 A1 WO2008074207 A1 WO 2008074207A1
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WIPO (PCT)
Prior art keywords
data
node
transmission
management
data table
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PCT/CN2007/002788
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English (en)
French (fr)
Inventor
Guoli Yin
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Coobol Technologies Co. Ltd.
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Application filed by Coobol Technologies Co. Ltd. filed Critical Coobol Technologies Co. Ltd.
Publication of WO2008074207A1 publication Critical patent/WO2008074207A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/66Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Definitions

  • the present invention relates to the field of computer network technologies, and more particularly to a data transmission system and method.
  • the Internet is a loose, open computer network composed of a number of autonomous computer networks, which in turn are composed of numerous computer networks of similar structure.
  • a group of network devices, including routers and switches, directly managed by these autonomous computer networks are treated as a single administrative domain. Most independent administrative domains are invested, controlled, and managed by ISPs (Internet Service Providers).
  • ISPs Internet Service Providers
  • Each of the independent administrative domains that make up the Internet is assigned an AS (Autonomous System) number and an IP address segment to ensure that it can be identified by other independent administrative domains in the Internet.
  • the AS number and IP address are uniformly distributed by the relevant regulatory agencies, such as CNNK and APNIC.
  • the core routing protocol BGP Border Gateway Protocol
  • BGP Border Gateway Protocol
  • the router looks for an optimal transmission path for each data frame passing through the router and efficiently transmits the data frame to the destination site.
  • a routing table is stored in the router, and the routing table records data related to various transmission paths, thereby realizing the transmission of data frames.
  • the routing table saved by the routers connecting the independent management domains is called a global routing table. These routers find a better transmission path for each data frame passing through the router, and effectively transmit the data to the independent destination. Administrative domain.
  • this type of data frame transmission is called network layer routing.
  • the same AS number may be jointly owned by one or more ISPs.
  • Each ISP is assigned one or more IP address segments. These IP address segments are unique.
  • the IP address segment can be represented by a Classless Inter-Domain Routing. For example, when the IP address segment is 65.254.224.0 - 65.254.255.255, its CIDR can be expressed as 65.254.224.0/19.
  • the ISP will assign consecutive IP address segments to one.
  • One or more management domains network nodes in the same management domain display the same or similar network transmission performance, such as the same delay, bandwidth, transmission capability, and so on.
  • the selection criteria of these routers can be based on other router attributes obtained by BGP, such as weight, local preference, and more. Multi-exit discriminator, Origin, AS-Path, Next hop, Community, etc.
  • the operators of the autonomous independent management domains also have their own various trade-off indices, such as the settlement of Internet traffic charges between ISPs, the non-opening scope of policies, etc. These trade-off indices also affect the performance of data frame transmission. Therefore, the data frame transmission path determined by the network layer is not optimal.
  • the router when selecting a transmission path, the router does not distinguish the different needs of various applications. Some data have very high real-time and continuous transmission requirements, such as VOIP, etc. Applications such as e-mail and file download have lower real-time performance. Therefore, the choice of the transmission path by the existing router without distinguishing the application may also cause some of the routers with excellent performance to be overloaded and cause network congestion.
  • the update period of the routing table in the router is long (updated on average 11 days), and the transmission path determined by the network layer is controlled by an autonomous domain administrator such as an ISP (the application layer cannot change the network layer transmission path), and the transmission path selected by the router is also not The best, resulting in inefficient data transmission.
  • the technical problem to be solved by the embodiments of the present invention is to provide a data transmission system and method based on an application layer, in view of the defect that the above-mentioned existing network layer selects a data transmission path and causes inefficient data transmission.
  • the technical solution adopted by the present invention to solve the technical problem is: constructing a data transmission system, configured to transmit data to be transmitted from a first node located in a first management domain to a second node located in a second management domain,
  • the first node includes a first data table recorded with transmission performance between the first node and the plurality of management domains
  • the second node includes a first recorded transmission performance between the second node and the plurality of management domains
  • the second data table, the first node further includes:
  • a data table obtaining unit configured to acquire a second data table
  • a selecting unit configured to select a third management domain from the plurality of management domains according to the first data table and the second data table, and the transmission path through the third management domain is better than directly connecting the first node and the second node Point transmission path;
  • a data transmission unit configured to transmit the data to be transmitted to the second node via the third management domain.
  • the transmission path formed by the third management domain selected by the selection unit and the first management domain and the second management domain is superior to the transmission composed of the other management domain and the first management domain and the second management domain. path.
  • the data transmission system further includes a route management structure, the route management structure includes a third data table and a data synchronization unit, wherein the third data table is used to record the transmission between the first management domain and other management domains.
  • Performance the data synchronization unit is configured to update the third data table according to a data table of record transmission performance of each node in the first management domain.
  • the first node includes a data update unit, configured to update the first data table according to the third data table.
  • the transmission performance includes one or more of a data transmission delay, a transmission bandwidth, and a packet loss rate.
  • the present invention also provides a data transmission method for transmitting data to be transmitted from a first node located in a first management domain to a second node located in a second management domain, where the first node includes the first node recorded a first data table of transmission performance between the plurality of management domains, the second node comprising a second data table recording transmission performance between the second node and the plurality of management domains, comprising the steps of:
  • the first node selects a third management domain from the plurality of management domains according to the first data table and the second data table, and the transmission path through the third management domain is superior to directly connecting the first node and the second node Transmission path
  • the first node transmits the data to be transmitted to the second node via the third management domain.
  • the data transmission method further includes the routing management structure updating the transmission performance data table between the first management domain and the other management domain according to the transmission performance data table of each node in the first management domain, where the first node is managed according to the route The performance data table in the structure, the step of updating the first data table.
  • the transmission performance in the first data table and the second data table includes one or more of a data transmission delay, a transmission bandwidth, and a packet loss rate.
  • the first node selects a third management domain by selecting different transmission performance indicators according to the data type to be transmitted.
  • the minimum transmission delay is selected as the index of the third management domain; when the data to be transmitted is the video session data,
  • the transmission bandwidth and the transmission delay are indicators for selecting the third management domain; when the data to be transmitted is a file, the transmission bandwidth is selected as the index of the third management domain; when the data to be transmitted is the text session data, the packet loss rate is used.
  • the minimum is the indicator for selecting the third administrative domain.
  • the data transmission system and method of the present invention effectively improves data transmission quality by selecting a node in the third management domain as a transit node in the application layer to implement data transmission.
  • the present invention improves the use efficiency of the Internet by selecting different transmission performance indicators according to the type of data to be transmitted.
  • FIG. 1 is a schematic structural view of a first embodiment of a data transmission system of the present invention.
  • FIG. 2 is a schematic structural diagram of the first management domain in FIG. 1.
  • FIG 3 is a schematic structural view of a second embodiment of the data transmission system of the present invention.
  • FIG. 4 is a flow chart of an embodiment of a data transmission method of the present invention. detailed description
  • the data transmission system and method of the present invention is for transmitting data between different administrative domains of the Internet.
  • the system and method of the present invention improves network transmission quality by selecting a transit node at the application layer.
  • the system and method of the present invention are described below by taking the transmission of data to be transmitted from a first node located in a first administrative domain to a second node located in a second administrative domain as an example.
  • a first management domain 11, a second management domain 12, and a plurality of other management domains 13 are included, wherein the first management domain 11 and the second management domain Between 12, a plurality of data transmission channels are included, for example, a direct data transmission channel between two management domains, or a data transmission channel via a plurality of management domains 13, respectively.
  • the plurality of management domains 13 described above may also be connected to each other.
  • the first management domain 11, the second management domain 12, and the management domain 13 refer to a group of network devices including routers and switches, and at least one network node, where the network node may be a server or a user. terminal.
  • Network nodes in 11, 12 or 13 in the same management domain are displayed externally The same or similar network transmission performance, such as the same delay, bandwidth, transmission capability, and the like.
  • the first management domain 11 described above includes at least a first node 111.
  • the first node 111 can be a user terminal (e.g., a personal computer, a digital multimedia terminal, a smart phone, etc.) or a server connected to a switch or router.
  • the first node 111 includes a first data table 112, a data table obtaining unit 113, a selecting unit 114, and a data transmitting unit 115.
  • the first data table 112 is used to record the transmission performance between the first management domain 11 and the second management domain 12 and the plurality of management domains 13 in which the first node 111 is located.
  • the above transmission performance includes one or more of data transmission delay, transmission bandwidth, and packet loss rate, as shown in Table 1.
  • the first data table 112 uses a relational database or any other form of data storage.
  • the second node in the second management domain 12 also includes a second data table, where the second data table is used to record the second management domain 12 and the first management domain 11 where the second node 111 is located, and multiple Manage the transmission performance between domains 13.
  • the data table obtaining unit 113 is configured to acquire the second data table from the second node.
  • the data table obtaining unit 113 transmits a request for acquiring the second data table to the second node through the network layer routing, and the second node also returns the second data table to the first node 11 through the network layer routing.
  • the data table obtaining unit 113 may obtain the second data table directly from the second node, or may obtain the second data table by relaying other nodes.
  • the selecting unit 114 is configured to select a third management domain from multiple management domains according to the transmission performance recorded in the first data table 112 and the second data table, and the transmission path through the third management domain is superior to the direct The transmission path connecting the first node 11 and the second node is superior to the transmission path via other management domains. For example, when the first data table 112 and the second data table are as shown in Table 1, Table 2, respectively, the selection unit 114 selects the management domain A as the transit node.
  • the data transmission unit 115 is configured to transmit the third management domain selected by the selection unit 114 to the second node.
  • the data transmission unit 115 selects one node in the third management domain as the transit node, and transmits the data to be transmitted to the second node.
  • the data transmission unit 115 may be in a different form in a specific application, such as a file uploading tool, a video session, an audio session, and the like.
  • the foregoing first data table 112 and the second data table may include different transmission performance indicators, such as data transmission delay, transmission bandwidth, and packet loss rate, so that the selecting unit 114 may select different transmissions according to the type of data to be transmitted. Performance. For example, when the data to be transmitted is the audio session data, the metric of the third management domain is selected with the minimum transmission delay; when the data to be transmitted is the video session data, the transmission bandwidth and the transmission delay are selected as indicators of the third management domain. When the data to be transmitted is a file, the metric of the third management domain is selected with the maximum transmission bandwidth; when the data to be transmitted is the text session data, the metric of the third management domain is selected with the minimum packet loss rate.
  • Performance For example, when the data to be transmitted is the audio session data, the metric of the third management domain is selected with the minimum transmission delay; when the data to be transmitted is the video session data, the transmission bandwidth and the transmission delay are selected as indicators of the third management domain.
  • the metric of the third management domain is selected with the maximum transmission
  • the first node 111 is also connected to a route management structure 31.
  • the routing management structure 31 is connected to a plurality of nodes for implementing data interaction between nodes connected thereto and nodes under other routing management structures, and at least includes a user terminal or a server.
  • the routing management structure 31 is independent of the management domain, which can serve multiple administrative domains.
  • a plurality of route management structures 31 may be included.
  • the route management structure 31 includes a third data table 313 and a data synchronization unit 314.
  • the third data table 313 is used to record the transmission performance between the first administrative domain 11 and the second administrative domain 12 and the plurality of administrative domains 13.
  • the third data table 313 can be implemented by a relational database or any other form of data storage.
  • the third data table 313 may also include the transmission performance between the management domain of the node connected thereto and other management domains.
  • the data synchronization unit 314 is configured to update the third data table 313 according to a data table of recording transmission performance of each node in the first management domain 11 (for example, the first data table 112 of the first node 111), thereby causing the third data table 313 Stay up to date.
  • the data synchronization unit 314 may update the third data table 313 according to the latest transmission performance, or may update the third data table 313 according to the average transmission performance.
  • the first node 111 may also include a data update unit (not shown), and the data further row unit updates the first data table 112 according to the content of the third data table 313, thereby causing the first data table 112. The content is kept up to date.
  • the transmission performance data in the first data table 113 can also be updated by any other existing manner.
  • the second management domain 12 and the management domain 13 have the same or similar structure as the first management domain 11, and belong to the same part of the Internet, and all nodes (for example, the second node) in the management domain have the same with the first node 111.
  • the same structure enables data transmission between any two nodes in the Internet.
  • FIG. 4 it is a flowchart of an embodiment of the data transmission method of the present invention for transmitting data to be transmitted from the first node 111 located in the first management domain 11 to the first location located in the second management domain 12.
  • a second node where the first node 111 includes a first data table 112 in which the transmission performance between the first node and the plurality of management domains is recorded, and the second node includes a record between the second node and the plurality of management domains.
  • a second data sheet of transmission performance including the following steps:
  • Step S41 The first node 111 acquires the second data table directly from the second node or via the transit node.
  • the step is implemented by routing of the network layer of the Internet.
  • Step S42 The first node 111 selects from multiple management domains according to the first data table and the second data table. Selecting a third management domain, the transmission path through the third management domain is superior to the transmission path directly connecting the first node 11 and the second node, and is superior to the transmission path via other management domains.
  • the transmission performance in the first data table and the second data table includes one or more of a data transmission delay, a transmission bandwidth, and a packet loss rate, in which the first node 111 selects different transmission performance according to the type of data to be transmitted.
  • Select the third administrative domain for the indicator For example, when the data to be transmitted is the audio session data, the metric of the third management domain is selected with the minimum transmission delay; when the data to be transmitted is the video session data, the transmission bandwidth and the transmission delay are selected as indicators of the third management domain.
  • the metric of the third management domain is selected with the maximum transmission bandwidth; when the data to be transmitted is the text session data, the metric of the third management domain is selected with the minimum packet loss rate.
  • Step S43 The first node 11 transmits the data to be transmitted to the second node via the third management domain. In this step, the first node 111 selects a specific node from the third management domain for data transmission.
  • a routing management structure is further included, and the first management 11 and other management are updated according to the transmission performance data table (for example, the first data table 112) of each node in the first management domain 11.
  • the inter-domain transmission performance data table; and the first node 11 periodically updates the first data table 112 according to the transmission performance data table in the routing management structure.
  • the second data table in the second node of the second administrative domain 12 is also updated in the same manner.

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Description

一种数据传输系统及方法
技术领域 本发明涉及计算机网络技术领域, 更具体地说, 涉及一种数据传输系统及 方法。
背景技术 互联网是由众多自治的计算机网络组成的一个松散、 开放的计算机网络, 这些自治的计算机网络又由类似结构的众多的计算机网络组成。 这些自治的计 算机网络所直接管理的一组包括路由器和交换机在内的网络设备视为一个独立 管理域, 多数独立管理域由 ISP (Internet Service Provider, 互联网服务提供商) 投资、 控制、 管理。
每一个组成互联网的独立管理域都分配有 AS (Autonomous System) 号和 IP地址段以保证能被互联网中的其它独立管理域识别。 AS号和 IP地址由相关 的管理机构统一发放, 如 CNNK、 APNIC等。 独立管理域之间通过互联网的 核心路由协议 BGP ( Border Gateway Protocol, 边际网关协议)将自身的 AS和 IP地址段广播至连接各独立管理域的路由器。
路由器为经过路由器的每个数据帧寻找一条最佳传输路径, 并将该数据帧 有效地传送到目的站点。 路由器中保存有路由表, 该路由表记录了各种传输路 径相关的数据, 从而实现数据帧的传输。 其中, 连接各独立管理域的路由器保 存的路由表称为全球路由表, 这些路由器为经过路由器的每个数据帧寻找一条 较佳的传输路径,并将该数据有效地传送到目的站点所在的独立管理域。在 OSI 模型和 TCP/IP参考模型终, 这种数据帧传输方式称之为网络层路由。
同一 AS号可能由一家或多家 ISP共同拥有, 每一个 ISP分配到一个或多 个 IP地址段, 这些 IP地址段具有唯一性, IP地址段可以用 CIDR块(Classless Inter-Domain Routing)表示,例如 IP地址段为 65.254.224.0 - 65.254.255.255时, 其 CIDR可表示为 65.254.224.0/19。 通常 ISP都会将连续的 IP地址段分配给一 个或多个管理域, 同一管理域内的网络节点对外显示出相同或者相似的网 传 输性能, 例如相同的延迟、 带宽、 传输能力等。 '; 因为现有的最佳传输路径在网络层由分散的路由器确定, 这些路由器的选 择标准除了可以根据由 BGP协议得到的其它路由器属性,如权重(Weight) , 本 地偏好 (Local preference), 多出口标识 (Multi-exit discriminator), 源 ( Origin) , AS路径 (AS-Path) , 下一跳 (Next hop) ,群体 (Community) 等。 此外, 各 自治的独立管理域的运营者也有自身的各种权衡指数, 例如 ISP之间的网际流 量费用结算、 政策规定的不可对外开放范围等, 这些权衡指数同样会影响数据 帧传输的性能, 从而造成网络层确定的数据帧传输路径并非是最佳的。
此外, 路由器在选择传输路径时, 并不区分各种应用的不同需求。 有些数 据的实时、 连续性传输要求非常高, 例如 VOIP等, 而诸如电子邮件、 文件下 载等应用对数瑪的实时性就低一些。 因此现有路由器不区分应用而选择传输路 径也会引起部分性能极佳的路由器负载量过大而引起网络堵塞。
路由器中路由表的更新周期较长 (平均 11天更新一次)、 网络层确定的传 输路径由 ISP等自治域管理者控制(应用层无法改变网络层传输路径), 同样导 致路由器选择的传输路径并非最佳, 造成数据传输效率低下。
发明内容 本发明实施例要解决的技术问题在于, 针对上述现有的网络层选择数据传 输路径造成数据传输效率低下的缺陷, 提供一种基于应用层的数据传输系统及 方法。
本发明解决其技术问题所采用的技术方案是: 构造一种数据传输系统, 用 于将待传输数据从位于第一管理域的第一节点传输到位于第二管理域的第二节 点, 所述第一节点包括记录有该第一节点与多个管理域之间的传输性能的第一 数据表, 所述第二节点包括记录有该第二节点与多个管理域之间的传输性能的 第二数据表, 所述第一节点还包括:
数据表获取单元, 用于获取第二数据表;
选择单元, 用于根据第一数据表和第二数据表从所述多个管理域中选择一 个第三管理域, 经由该第三管理域的传输通路优于直接连接第一节点和第二节 点的传输通路;
数据传输单元, 用于将待传输数据经由第三管理域传输到第二节点。 上述的数据传输系统中, 所述选择单元选择的第三管理域与第一管理域、 第二管理域组成的传输通路优于经由其它管理域与第一管理域、 第二管理域组 成的传输通路。
上述的数据传输系统中, 还包括路由管理结构体, 所述路由管理结构体包 括第三数据表和数据同步单元, 其中第三数据表用于记录第一管理域与其它管 理域之间的传输性能, 所述数据同步单元用于根据第一管理域中的各个节点的 记录传输性能的数据表更新第三数据表。
上述的数据传输系统中, 所述第一节点包括数据更新单元, 用于根据所述 第三数据表更新第一数据表。 ' 上述的数据传输系统中, 所述传输性能包括数据传输时延、 传输带宽、 丢 包率中的一个或多个。
本发明还提供一种数据传输方法, 用于将待传输数据从位于第一管理域的 第一节点传输到位于第二管理域的第二节点, 所述第一节点包括记录有该第一 节点与多个管理域之间的传输性能的第一数据表, 所述第二节点包括记录有该 第二节点与多个管理域之间的传输性能的第二数据表, 包括以下步骤:
( a) 第一节点获取第二数据表;
(b ) 第一节点根据第一数据表和第二数据表从多个管理域中选择一个第 三管理域, 经由该第三管理域的传输通路优于直接连接第一节点和第二节点的 传输通路;
( c) 第一节点将待传输数据经由第三管理域传输到第二节点。
上述的数据传输方法中, 还包括路由管理结构体根据第一管理域中的各个 节点的传输性能数据表, 更新第一管理域与其它管理域间的传输性能数据表, 第一节点根据路由管理结构体中传输性能数据表, 更新第一数据表的步骤。
上述的数据传输方法中, 所述第一数据表和第二数据表中的传输性能包括 数据传输时延、 传输带宽、 丢包率中的一个或多个, 在所述步骤(b ) 中, 所述 第一节点根据待传输数据类型选择不同的传输性能指标选择第三管理域。 上述的数据传输方法中, 所述步骤 (b) 中, 当待传输数据为音频会话数 据时, 以传输时延最小为选择第三管理域的指标; 当待传输数据为视频会话数 据时, 以传输带宽和传输时延为选择第三管理域的指标; 当待传输数据为文件 时, 以传输带宽最大为选择第三管理域的指标; 当待传输数据为文字会话数据 时, 以丢包率最小为选择第三管理域的指标。
本发明的数据传输系统及方法, 通过在应用层选择第三管理域中的节点作 为中转节点实现数据传输, 有效改善了数据传输质量。 此外, 本发明还通过根 据待传输数据的类型选择不同传输性能指标, 提高了互联网的使用效率。 附图说明
下面将结合附图及实施例对本发明作进一步说明, 附图中:
图 1是本发明数据传输系统第一实施例的结构示意图。
图 2是图 1中第一管理域的结构示意图。
图 3是本发明数据传输系统第二实施例的结构示意图。
图 4是本发明数据传输方法实施例的流程图。 具体实施方式
本发明的数据传输系统及方法用于在互联网的不同管理域间传输数据。 本 发明的系统及方法通过在应用层选择中转节点, 从而改善网络传输质量。 以下 以将待传输数据从位于第一管理域的第一节点传输到位于第二管理域的第二节 点为例, 说明本发明的系统及方法。
如图 1所示, 在本发明数据传输系统的一个实施例中, 包括有第一管理域 11、 第二管理域 12以及多个其它管理域 13, 其中第一管理域 11与第二管理域 12之间包括多条数据传输通道, 例如两个管理域之间直接的数据传输通道, 或 者分别经由多个管理域 13的数据传输通道。 当然, 上述多个管理域 13之间也 可以相互连接。
在本实施例中, 第一管理域 11、第二管理域 12以及管理域 13是指一组包 括路由器和交换机在内的网络设备, 并至少包括一个网络节点, 其中网络节点 可以是服务器或用户终端。 同一管理域内 11、 12或 13中的网络节点对外显示 出相同或者相似的网络传输性能, 例如相同的延迟、 带宽、 传输能力等。
如图 2所示, 上述的第一管理域 11至少包括有第一节点 111。 该第一节点 111 可以是连接到交换机或路由器的用户终端 (例如个人电脑、 数字多媒体终 端、 智能手机等) 或服务器。
在本实施例中,第一节点 111包括有第一数据表 112、数据表获取单元 113、 选择单元 114、 数据传输单元 115。
第一数据表 112用于记录该第一节点 111所在的第一管理域 11与第二管理 域 12以及多个管理域 13之间的传输性能。上述的传输性能包括数据传输时延、 传输带宽、 丢包率中的一个或多个, 如表 1所示。 在具体实现时, 该第一数据 表 112使用关系型数据库或者其它任何形式的数据存储形式。
Figure imgf000007_0001
表 1 : 第一数据表实例
相应地, 第二管理域 12 中的第二节点, 也包括一个第二数据表, 该第二 数据表用于记录第二节点 111所在的第二管理域 12与第一管理域 11以及多个 管理域 13之间的传输性能。
数据表获取单元 113用于从第二节点获取第二数据表。 在本实施例中, 数 据表获取单元 113通过网络层路由将获取第二数据表的请求传送到第二节点, 第二节点也通过网络层路由将第二数据表返回至第一节点 11。 在具体应用中, 数据表获取单元 113可以直接从第二节点获取第二数据表, 也可通过其它节点 中转, 获取第二数据表。
选择单元 114用于根据第一数据表 112和第二数据表中记录的传输性能, 从多个管理域中选择一个第三管理域, 经由该第三管理域的传输通路优于直接 连接第一节点 11和第二节点的传输通路, 且优于经由其它管理域的传输通路。 例如, 当第一数据表 112和第二数据表分别如表 1、表 2所示时, 选择单元 114 选择管理域 A作为中转节点。
Figure imgf000008_0001
表 2: 第二数据表实例
数据传输单元 115用于将待传输数据经由上述选择单元 114选择的第三管 理域传输到第二节点。 在具体实现时, 数据传输单元 115选择第三管理域中的 一个节点作为中转节点, 将待传输数据发送到第二节点。 数据传输单元 115在 具体应用中可以是不同的形式, 例如可以是文件上传工具、 视频会话、 音频会 话等。
当然,上述的第一数据表 112和第二数据表可以包括不同的传输性能指标, 例如数据传输时延、 传输带宽、 丢包率, 从而选择单元 114可以根据待传输数 据的类型选择不同的传输性能指标。 例如当待传输数据为音频会话数据时, 以 传输时延最小为选择第三管理域的指标; 当待传输数据为视频会话数据时, 以 传输带宽和传输时延为选择第三管理域的指标; 当待传输数据为文件时, 以传 输带宽最大为选择第三管理域的指标; 当待传输数据为文字会话数据时, 以丢 包率最小为选择第三管理域的指标。
如图 3所示, 在本发明的第二实施例中, 第一节点 111还连接到一个路由 管理结构体 31。 该路由管理结构体 31与多个节点连接, 用于实现与之连接的 节点与其它路由管理结构体下的节点间的数据交互, 其至少包括一个用户终端 或服务器。在具体应用中, 路由管理结构体 31独立于管理域, 其可服务于多个 管理域。 在互联网中, 可包括多个路由管理结构体 31。 在本实施例中, 路由管理结构体 31包括第三数据表 313 以及数据同步单 元 314。
第三数据表 313用于记录第一管理域 11与第二管理域 12以及多个管理域 13之间的传输性能。该第三数据表 313可通过关系型数据库或其它任何数据存 储形式实现。 当然, 第三数据表 313中还可包括与之连接的节点所在管理域与 其它管理域间的传输性能。
数据同步单元 314用于根据第一管理域 11 中的各个节点的记录传输性能 的数据表(例如第一节点 111的第一数据表 112)更新第三数据表 313, 从而使 第三数据表 313保持最新。 在具体实现时, 数据同步单元 314可以根据最新的 传输性能更新第三数据表 313, 也可以根据平均的传输性能更新第三数据表 313。 相应地, 第一节点 111中也可以包括一个数据更新单元 (图中未示出), 该数据更行单元根据第三数据表 313的内容更新第一数据表 112, 从而使第一 数据表 112的内容保持最新。
当然, 除了第二实施例中通过第三数据表 313更新第一数据表 112, 也可 通过其它任一现有的方式更新第一数据表 113中的传输性能数据。
此外,若将第一节点 111中的各个单元置于上述路由结构体 31中,或者将 路由结构体 31中的各个单元置于第一节点 111中,同样可以实现本发明的效果。 第二管理域 12以及管理域 13与第一管理域 11具有相同或类似的结构,同属于 互联网的一部分, 而该等管理域中的所有节点 (例如第二节点) 都与第一节点 111具有相同的结构, 从而实现互联网中任两个节点间的数据传输。
如图 4所示, 是本发明数据传输方法的一个实施例的流程图, 该方法用于 将待传输数据从位于第一管理域 11的第一节点 111传输到位于第二管理域 12 的第二节点, 其中第一节点 111包括记录有该第一节点与多个管理域之间的传 输性能的第一数据表 112, 第二节点包括记录有该第二节点与多个管理域之间 的传输性能的第二数据表, 包括以下步骤:
步骤 S41 : 第一节点 111直接从第二节点获取或经由中转节点获取第二数 据表。 在本实施例中, 该步骤通过互联网的网络层的路由实现。
步骤 S42: 第一节点 111根据第一数据表和第二数据表从多个管理域中选 择一个第三管理域, 经由该第三管理域的传输通路优于直接连接第一节点 11 和第二节点的传输通路, 且优于经由其它管理域的传输通路。
第一数据表和第二数据表中的传输性能包括数据传输时延、 传输带宽、 丢 包率中的一个或多个, 在该步骤中第一节点 111根据待传输数据类型选择不同 的传输性能为指标选择第三管理域。 例如当待传输数据为音频会话数据时, 以 传输时延最小为选择第三管理域的指标; 当待传输数据为视频会话数据时, 以 传输带宽和传输时延为选择第三管理域的指标; 当待传输数据为文件时, 以传 输带宽最大为选择第三管理域的指标; 当待传输数据为文字会话数据时, 以丢 包率最小为选择第三管理域的指标。
步骤 S43 : 第一节点 11将待传输数据经由第三管理域传输到第二节点。在 该步骤中, 第一节点 111从第三管理域中选择一个具体的节点进行数据传输。
此外, 在本发明的其它实施例中, 还包括路由管理结构体, 根据第一管理 域 11 中的各个节点的传输性能数据表 (例如第一数据表 112), 更新第一管理 11与其它管理域间的传输性能数据表; 而第一节点 11定时根据路由管理结 构体中传输性能数据表, 更新第一数据表 112。 同样地, 第二管理域 12的第二 节点中的第二数据表也以相同方式更新。
以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范围并不局 限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到的变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应该以权利要求的保护范围为准。

Claims

权 利 要 求
1、 一种数据传输系统, 用于将待传输数据从位于第一管理域的第一节点 传输到位于第二管理域的第二节点, 其特征在于, 所述第一节点包括记录有该 第一节点与多个管理域之间的传输性能的第一数据表, 所述第二节点包括记录 有该第二节点与多个管理域之间的传输性能的第二数据表, 所述第一节点还包 括:
数据表获取单元, 用于获取第二数据表;
选择单元, 用于根据第一数据表和第二数据表从所述多个管理域中选择一 个第三管理域, 经由该第三管理域的传输通路优于直接连接第一节点和第二节 点的传输通路;
数据传输单元, 用于将待传输数据经由第三管理域传输到第二节点。
2、 根据权利要求 1 所述的数据传输系统, 其特征在于, 所述选择单元选 择的第三管理域与第一管理域、 第二管理域组成的传输通路优于经由其它管理 域与第一管理域、 第二管理域组成的传输通路。
3、 根据权利要求 1 所述的数据传输系统, 其特征在于, 还包括路由管理 结构体, 所述路由管理结构体包括第三薮据表和数据同步单元, 其中第三数据 表用于记录第一管理域与其它管理域之间的传输性能, 所述数据同步单元用于 根据第一管理域中的各个节点的记录传输性能的数据表更新第三数据表。
4、 根据权利要求 3 所述的数据传输系统, 其特征在于, 所述第一节点包 括数据更新单元, 用于根据所述第三数据表更新第一数据表。
5、根据权利要求 1-4中任一项所述的数据传输系统, 其特征在于, 所述传 输性能包括数据传输时延、 传输带宽、 丢包率中的一个或多个。
6、 一种数据传输方法, 用于将待传输数据从位于第一管理域的第一节点 传输到位于第二管理域的第二节点, 其特征在于, 所述第一节点包括记录有该 第一节点与多个管理域之间的传输性能的第一数据表, 所述第二节点包括记录 有该第二节点与多个管理域之间的传输性能的第二数据表, 包括以下步骤:
' (a) 第一节点获取第二数据表; (b) 第一节点根据第一数据表和第二数据表从多个管理域中选择 个第 三管理域, 经由该第三管理域的传输通路优于直接连接第一节点和第二节点的 传输通路;
(C) 第一节点将待传输数据经由第三管理域传输到第二节点。
7、 根据权利要求 6所述的数据传输方法, 其特征在于, 还包括路由管理 结构体根据第一管理域中的各个节点的传输性能数据表, 更新第一管理域与其 它管理域间的传输性能数据表, 第一节点根据路由管理结构体中传输性能数据 表, 更新第一数据表的步骤。
8、 根据权利要求 6所述的数据传输方法, 其特征在于, 所述第一数据表 和第二数据表中的传输性能包括数据传输时延、 传输带宽、 丢包率中的一个或 多个, 在所述步骤(b)中, 所述第一节点根据待传输数据类型选择不同的传输 性能指标选择第三管理域。
9、根据权利要求 8所述的数据传输方法, 其特征在于, 所述步骤(b)中, 当待传输数据为音频会话数据时, 以传输时延最小为选择第三管理域的指标; 当待传输数据为视频会话数据时, 以传输带宽和传输时延为选择第三管理域的 指标; 当待传输数据为文件时, 以传输带宽最大为选择第三管理域的指标; 当 待传输数据为文字会话数据时, 以丢包率最小为选择第三管理域的指标。
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