CN103475654B - Network path optimization method, equipment and network system - Google Patents
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Abstract
本发明公开了一种网络路径优化方法、设备及网络系统。该网络系统包括多个节点服务器以及RTT监控服务器。其中,节点服务器,应用于对从客户端连接到源站服务器的网络路径进行优化,包括:RTT统计单元,适于统计各客户端到该节点服务器的RTT值;RTT发送单元,适于发送所统计的RTT值。RTT监控服务器,包括:RTT接收单元,适于接收多个节点服务器发送的RTT值;RTT计算单元,适于各个客户端,计算得到对于该客户端而言RTT值最小的节点服务器。采用本发明能够对从客户端经由节点服务器连接到源站服务器的网络路径进行优化。
The invention discloses a network path optimization method, equipment and network system. The network system includes multiple node servers and an RTT monitoring server. Among them, the node server is used to optimize the network path from the client to the source server, including: an RTT statistics unit, which is suitable for counting the RTT values from each client to the node server; an RTT sending unit, which is suitable for sending all Statistical RTT value. The RTT monitoring server includes: an RTT receiving unit adapted to receive RTT values sent by multiple node servers; an RTT calculation unit adapted to each client to calculate the node server with the smallest RTT value for the client. The invention can optimize the network path from the client to the origin server via the node server.
Description
技术领域technical field
本发明涉及互联网应用领域,具体涉及一种网络路径优化方法、设备及网络系统。The invention relates to the field of Internet applications, in particular to a network path optimization method, equipment and network system.
背景技术Background technique
互联网的飞速发展已非其创建之初可同日而语,无论是企业,还是普通的网民都对网速有着较高的要求。而不同网络(例如电信与联通)之间需要进行互联互通。在互联互通的过程中,由当前网络进入另一网络,考虑到网络自身存在网络抖动或故障的问题,且业务高峰时存在网络繁忙等情况,均可能导致网络阻塞的出现。The rapid development of the Internet is no longer the same as when it was created. Both enterprises and ordinary Internet users have higher requirements for Internet speed. And different networks (such as China Telecom and China Unicom) need to be interconnected. In the process of interconnection and intercommunication, the current network enters another network, considering that the network itself has network jitter or failure problems, and the network is busy during peak hours of business, which may lead to network congestion.
导致网络阻塞的原因多种多样,比如:网络中存在回路导致网速变慢,网络设备硬件故障引起的广播风暴而导致网速变慢,网络中某个端口形成瓶颈导致网速变慢等等。There are many reasons for network congestion, such as: there are loops in the network that cause the network speed to slow down, broadcast storms caused by network equipment hardware failures cause the network speed to slow down, a certain port in the network forms a bottleneck and the network speed slows down, etc. .
在面对如此多变的网络情况下,如何给用户提供一个稳定的访问过程,这一问题尚未得到解决。In the face of such a changeable network situation, how to provide users with a stable access process has not yet been resolved.
发明内容Contents of the invention
鉴于上述问题,提出了本发明以便提供一种克服上述问题或者至少部分地解决上述问题的网络系统、节点服务器、RTT监控服务器和相应的网络路径优化方法。In view of the above problems, the present invention is proposed to provide a network system, a node server, an RTT monitoring server and a corresponding network path optimization method that overcome the above problems or at least partially solve the above problems.
依据本发明的一个方面,提供了一种网络系统中的节点服务器,应用于对从客户端连接到源站服务器的网络路径进行优化,包括:RTT统计单元,适于统计各客户端到该节点服务器的RTT值;RTT发送单元,适于发送所统计的RTT值。According to one aspect of the present invention, a node server in a network system is provided, which is used to optimize the network path from the client to the source station server, including: an RTT statistical unit, which is suitable for counting each client to the node The RTT value of the server; the RTT sending unit is suitable for sending the counted RTT value.
可选的,所述网络系统包括源站服务器和多个节点服务器,其中所述源站服务器通过将内容分发到多个节点服务器中来向各个客户端提供内容,以及各个客户端经由所述节点服务器来获取内容。Optionally, the network system includes an origin station server and a plurality of node servers, wherein the origin station server provides content to each client by distributing the content to the plurality of node servers, and each client passes through the node server server to retrieve content.
可选的,所述RTT值为在客户端与节点服务器建立TCP/IP连接时,从节点服务器发出握手确认信号到收到来自客户端对所述握手确认信号发出的确认信号的时间间隔值。Optionally, the RTT value is the time interval value from when the client establishes a TCP/IP connection with the node server, from when the node server sends a handshake confirmation signal to when it receives a confirmation signal from the client for the handshake confirmation signal.
可选的,所述客户端为多个分布在不同地理区域的客户端。Optionally, the client is a plurality of clients distributed in different geographical regions.
根据本发明的另一方面,提供了一种RTT监控服务器,包括:RTT接收单元,适于接收多个节点服务器发送的RTT值;RTT计算单元,适于各个客户端,计算得到对于该客户端而言RTT值最小的节点服务器。According to another aspect of the present invention, an RTT monitoring server is provided, including: an RTT receiving unit, adapted to receive RTT values sent by multiple node servers; an RTT calculation unit, adapted to each client, and calculating for the client In terms of the node server with the smallest RTT value.
可选的,上述RTT监控服务器还包括:网络拥堵评估单元,适于判断一客户端根据与该客户端相关联的路由而连接到节点服务器的RTT值是否超过阈值;路由更改单元,适于在所述网络拥堵评估单元确定该客户端连接到节点服务器的RTT值超过阈值时,修改与该客户端相关联的路由,以便该客户端连接到对该客户端而言RTT值最小的节点服务器。Optionally, the above-mentioned RTT monitoring server also includes: a network congestion assessment unit, adapted to determine whether the RTT value of a client connected to a node server according to a route associated with the client exceeds a threshold; a route modification unit, adapted to When the network congestion assessment unit determines that the RTT value of the client connecting to the node server exceeds a threshold, it modifies the route associated with the client so that the client connects to the node server with the smallest RTT value for the client.
可选的,所述路由更改单元通过修改与该客户端相关联的DNS来修改与该客户端相关联的路由。Optionally, the route modification unit modifies the route associated with the client by modifying the DNS associated with the client.
根据本发明的另一方面,提供了一种网络路径优化的方法,应用于对从客户端经由节点服务器连接到源站服务器的网络路径进行优化,包括:According to another aspect of the present invention, a network path optimization method is provided, which is applied to optimize the network path from a client to an origin server via a node server, including:
接收由每个节点服务器统计的从客户端到该节点服务器的RTT值;Receive the RTT value from the client to the node server counted by each node server;
对于各个客户端,计算得到对于该客户端而言RTT最小的节点服务器;For each client, calculate the node server with the smallest RTT for the client;
判断一客户端根据与该客户端相关联的路由而连接到节点服务器的RTT值是否超过阈值;Judging whether the RTT value of a client connecting to the node server according to the route associated with the client exceeds a threshold;
如超过阈值,修改与该客户端相关联的路由,以便该客户端连接到与该客户端而言RTT值最小的节点服务器。If the threshold is exceeded, modify the route associated with the client so that the client connects to the node server with the smallest RTT value for the client.
可选的,所述与客户端相关联的路由指定了该客户端应当连接的节点服务器。Optionally, the route associated with the client specifies the node server that the client should connect to.
可选的,所述RTT值为在客户端与节点服务器建立TCP/IP连接时,从节点服务器发出握手确认信号到收到来自客户端对所述握手确认信号发出确认信号的时间间隔值。Optionally, the RTT value is a time interval value from when the client establishes a TCP/IP connection with the node server, from when the node server sends a handshake confirmation signal to when the client sends a confirmation signal to the handshake confirmation signal.
可选的,所述客户端为多个分布在不同地理区域的客户端。Optionally, the client is a plurality of clients distributed in different geographical regions.
在本发明实施例中,可以利用RTT统计单元统计出各个客户端到该节点服务器的RTT值,进而可以利用计算RTT值选出网络最优路径。相对于现有技术中提及的网络阻塞情况,本发明实施例通过计算RTT值自动诊断,能够快速准确地选取出最优路径,避免在不稳定路径上进行网络访问,保证访问过程网络的稳定,提高用户体验。In the embodiment of the present invention, the RTT statistics unit can be used to calculate the RTT value from each client to the node server, and then the optimal path of the network can be selected by calculating the RTT value. Compared with the network congestion situation mentioned in the prior art, the embodiment of the present invention automatically diagnoses by calculating the RTT value, can quickly and accurately select the optimal path, avoid network access on an unstable path, and ensure the stability of the network during the access process , improve user experience.
上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,而可依照说明书的内容予以实施,并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂,以下特举本发明的具体实施方式。The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.
附图说明Description of drawings
通过阅读下文优选实施方式的详细描述,各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的,而并不认为是对本发明的限制。而且在整个附图中,用相同的参考符号表示相同的部件。在附图中:Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:
图1示出了根据本发明一个实施例的网络系统的结构示意图;FIG. 1 shows a schematic structural diagram of a network system according to an embodiment of the present invention;
图2示出了根据本发明一个实施例的网络路径优化的方法的处理流程图;Fig. 2 shows the processing flowchart of the method for network path optimization according to one embodiment of the present invention;
图3示出了根据本发明一个实施例的RTT值计算方法的处理流程图;Fig. 3 shows the processing flowchart of the RTT value calculating method according to one embodiment of the present invention;
图4示出了根据本发明一个实施例的网络路径优化的系统结构示意图;FIG. 4 shows a schematic structural diagram of a network path optimization system according to an embodiment of the present invention;
图5示出了根据本发明一个实施例的网络路径优化的详细流程图。Fig. 5 shows a detailed flowchart of network path optimization according to an embodiment of the present invention.
具体实施方式detailed description
在此提供的算法和显示不与任何特定计算机、虚拟系统或者其它设备固有相关。各种通用系统也可以与基于在此的示教一起使用。根据上面的描述,构造这类系统所要求的结构是显而易见的。此外,本发明也不针对任何特定编程语言。应当明白,可以利用各种编程语言实现在此描述的本发明的内容,并且上面对特定语言所做的描述是为了披露本发明的最佳实施方式。The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other device. Various generic systems can also be used with the teachings based on this. The structure required to construct such a system is apparent from the above description. Furthermore, the present invention is not specific to any particular programming language. It should be understood that various programming languages can be used to implement the content of the present invention described herein, and the above description of specific languages is for disclosing the best mode of the present invention.
在内容分发网络(Content Delivery Network,以下简称CDN)中,目前主要采用的方法是通过镜像实现改善网络阻塞这一目的。具体的,CDN通过镜像,缓存用户的网站内容,来提高访问速度。但在CDN缓存过期时,无法继续缓存用户的网站内容,需要到用户源站请求相应内容,此时若突然出现网络抖动,依然会出现网速不稳甚至网络阻塞的问题。In the Content Delivery Network (hereinafter referred to as CDN), the main method currently adopted is to achieve the purpose of improving network congestion through mirroring. Specifically, the CDN improves the access speed by mirroring and caching the user's website content. However, when the CDN cache expires, the user's website content cannot be continuously cached, and it is necessary to request the corresponding content from the user's origin site. At this time, if there is a sudden network jitter, the problem of unstable network speed or even network congestion will still occur.
为解决上述技术问题,本发明实施例提供一种网络系统。图1示出了根据本发明一个实施例的网络系统的结构示意图。如图1所示,网络系统中至少包括有源站服务器110、多个节点服务器120、往返时延(Round-Trip Time,以下简称RTT)监控服务器130以及客户端140。图1中节点服务器120的数量显示为3个,仅用于示例多个,实际应用中,节点服务器120的具体数量可能是任意整数值,根据具体情况设定。每个节点服务器120中架构是相似的,在此不做赘述。To solve the above technical problem, an embodiment of the present invention provides a network system. Fig. 1 shows a schematic structural diagram of a network system according to an embodiment of the present invention. As shown in FIG. 1 , the network system includes at least an active station server 110 , multiple node servers 120 , a Round-Trip Time (RTT) monitoring server 130 and a client 140 . The number of node servers 120 shown in FIG. 1 is three, which is only used as an example. In practical applications, the specific number of node servers 120 may be any integer value, which is set according to specific situations. The architecture of each node server 120 is similar, and will not be repeated here.
现介绍网络系统中各器件或组成的功能以及各部分间的连接关系。首先,源站服务器110与多个节点服务器120分别耦合,将内容分发到多个节点服务器120。节点服务器120中的RTT统计单元121统计各个客户端到该节点服务器的RRT值,进而由节点服务器120中的RTT发送单元122发送所统计的RTT值。Now introduce the functions of each device or component in the network system and the connection relationship between each part. Firstly, the origin server 110 is coupled to multiple node servers 120 respectively, and distributes content to the multiple node servers 120 . The RTT statistics unit 121 in the node server 120 counts the RRT values from each client to the node server, and then the RTT sending unit 122 in the node server 120 sends the counted RTT values.
此处需要说明RTT值的具体定义。在本发明实施例中,RTT值的计算方式如下:在客户端140与任意一个节点服务器120建立传输控制协议/互联网络协议(Transmission Control Protocol/InternetProtocol,以下简称TCP/IP)连接时,从该节点服务器120发出握手确认信号,到收到来自客户端140对握手确认信号发出的确认信号的时间间隔值。图1所示的网络系统中,源站服务器110通过将内容分发到多个节点服务器120中,由多个节点服务器120向各客户端140提供内容。相应的,在另一侧,各个客户端140经由节点服务器120来获取内容。同时,其中,各个客户端140可以为多个分布在不同地理区域的客户端,并不需要局限在某一指定或相同的地理区域。The specific definition of the RTT value needs to be explained here. In the embodiment of the present invention, the calculation method of the RTT value is as follows: when the client 140 establishes a Transmission Control Protocol/Internet Protocol (TCP/IP for short) connection with any node server 120, from the The time interval between the node server 120 sending the handshake confirmation signal and receiving the confirmation signal from the client 140 for the handshake confirmation signal. In the network system shown in FIG. 1 , the origin server 110 distributes the content to multiple node servers 120 , and multiple node servers 120 provide content to each client 140 . Correspondingly, on the other side, each client 140 acquires content via the node server 120 . Meanwhile, each client 140 may be a plurality of clients distributed in different geographic regions, and does not need to be limited to a specified or the same geographic region.
由上述可知,在本发明实施例中,可以利用RTT统计单元121统计出各个客户端140到对应的节点服务器120的RTT值,进而可以利用计算RTT值选出网络最优路径。相对于现有技术中提及的网络阻塞情况,本发明实施例通过计算RTT值自动诊断,能够快速准确地选取出最优路径,避免在不稳定路径上进行网络访问,保证访问过程网络的稳定,提高用户体验。It can be seen from the above that in the embodiment of the present invention, the RTT statistics unit 121 can be used to calculate the RTT value from each client 140 to the corresponding node server 120, and then the optimal path of the network can be selected by calculating the RTT value. Compared with the network congestion situation mentioned in the prior art, the embodiment of the present invention automatically diagnoses by calculating the RTT value, can quickly and accurately select the optimal path, avoid network access on an unstable path, and ensure the stability of the network during the access process , improve user experience.
其次,在图1所示的网络系统中,RTT监控服务器130与各节点服务器120相耦合。RRT监控服务器130利用自身的RTT接收单元131接收节点服务器120发送的RTT值。接收到上述RTT值后,再由RTT计算单元134计算出所返回的所有RTT值中的最小值,即得到对于该客户端140而言RTT值最小的节点服务器。同时,客户端140将默认连接机房所返回的RTT值发送给RTT监控服务器130中的网络拥堵评估单元132。网络拥堵评估单元132对接收的RTT值进行评估,根据评估结果不同进行不同的处理。若网络拥堵评估单元132得出的评估结果是评估的RTT值超过预设阈值,则触发路由更改单元133,由其修改与该客户端140相关联路由以便选取最优网络路径。Secondly, in the network system shown in FIG. 1 , the RTT monitoring server 130 is coupled with each node server 120 . The RRT monitoring server 130 uses its own RTT receiving unit 131 to receive the RTT value sent by the node server 120 . After receiving the above RTT value, the RTT calculation unit 134 calculates the minimum value among all the returned RTT values, that is, obtains the node server with the minimum RTT value for the client 140 . At the same time, the client 140 sends the RTT value returned by the default connection computer room to the network congestion evaluation unit 132 in the RTT monitoring server 130 . The network congestion evaluation unit 132 evaluates the received RTT value, and performs different processing according to different evaluation results. If the evaluation result obtained by the network congestion evaluation unit 132 is that the evaluated RTT value exceeds the preset threshold, the route modification unit 133 is triggered to modify the route associated with the client 140 so as to select an optimal network path.
具体地,网络拥堵评估单元132评估网络系统默认的、与客户端140建立连接的机房所返回的RTT值是否超过预设阈值,如果超过预设阈值,则触发路由更改单元133,若未超过预设阈值,则继续使用当前路由。在网络拥堵评估单元132评估当前RRT值超过预设阈值的情况下,路由更改单元133修改与该客户端140相关联的路由,以便该客户端140连接到相对RTT值更小的节点服务器,当然,优选的,是连接到RTT值最小的节点服务器。Specifically, the network congestion evaluation unit 132 evaluates whether the RTT value returned by the network system default and the computer room that establishes a connection with the client 140 exceeds a preset threshold, and if it exceeds the preset threshold, the route modification unit 133 is triggered; If the threshold is set, the current route will continue to be used. When the network congestion evaluation unit 132 evaluates that the current RRT value exceeds the preset threshold, the route modification unit 133 modifies the route associated with the client 140 so that the client 140 is connected to a node server with a smaller relative RTT value, of course , preferably, connect to the node server with the smallest RTT value.
在一个优选的实施例中,路由更改单元133在执行路由更改这一操作之前,向RTT计算单元134发出查询请求,查询对于该客户端140而言当前RTT值最小的节点服务器。RTT计算单元134接收到查询请求后,向路由更改单元133返回响应消息,其中携带有对当前客户端140而言RTT值最小的节点服务器的信息。路由更改单元133根据RTT计算单元134返回的结果,修改与该客户端140相关联的DNS来修改与该客户端140相关联的路由。In a preferred embodiment, before performing the operation of route modification, the route modification unit 133 sends a query request to the RTT calculation unit 134 to query the node server with the smallest current RTT value for the client 140 . After receiving the query request, the RTT calculation unit 134 returns a response message to the route modification unit 133 , which carries the information of the node server with the smallest RTT value for the current client 140 . The route modification unit 133 modifies the DNS associated with the client 140 to modify the route associated with the client 140 according to the result returned by the RTT calculation unit 134 .
在本发明实施例中,各服务器是独立的,并不依附于本文所提及的网络系统。节点服务器可以独立对发送来的RTT值进行统计及发送的处理,RTT监控服务器可以独立对收到的RTT值进行接收、计算、判断是否超过预设阈值以及查找RTT最小值的处理。In the embodiment of the present invention, each server is independent and does not depend on the network system mentioned herein. The node server can independently count and send the sent RTT value, and the RTT monitoring server can independently receive, calculate, judge whether the received RTT value exceeds the preset threshold and find the minimum RTT value.
基于上文各优选实施例提供的网络系统以及各服务器,基于同一发明构思,本发明实施例提供了一种网络路径优化方法,用于对从客户端经由节点服务器连接到源站服务器的网络路径进行优化。图2示出了根据本发明一个实施例的网络路径优化方法的处理流程图。参见图2,该方法包括步骤S202至步骤S208。Based on the network systems and servers provided by the preferred embodiments above, and based on the same inventive concept, this embodiment of the present invention provides a network path optimization method, which is used to optimize the network path from the client to the origin server via the node server. optimize. Fig. 2 shows a processing flowchart of a network path optimization method according to an embodiment of the present invention. Referring to Fig. 2, the method includes step S202 to step S208.
在图2所示流程中,首先执行步骤S202,接收由每个节点服务器统计的从客户端到该节点服务器的RTT值。步骤S202能够接收到的RTT值的数量取决于客户端的数量以及节点服务器的数量。In the process shown in FIG. 2 , step S202 is first executed to receive the RTT value from the client to the node server counted by each node server. The number of RTT values that can be received in step S202 depends on the number of clients and the number of node servers.
对于每个客户端,由于节点服务器的数量为多个,因此,其对应的RTT值均为多个。在RTT值为多个时,执行步骤S204,对于各个客户端,在步骤S202接收的RTT值中,计算得到对于该客户端而言RTT值最小的节点服务器。For each client, since there are multiple node servers, there are multiple corresponding RTT values. When there are multiple RTT values, step S204 is executed, and for each client, among the RTT values received in step S202, the node server with the smallest RTT value for the client is calculated.
进一步,对于各客户端是否需要更改路由进行判定。即,执行步骤S206,判断一客户端根据与该客户端相关联的路由而连接到节点服务器的RTT值是否超过阈值。其中与客户端相关联的路由指定该客户端应当连接的节点服务器。根据判断结果执行后续操作,若判断结果为是,触发步骤S208,若判断结果为否,则流程结束。当RTT值超过阈值时,执行步骤S208,此时修改与该客户端相关联的路由,以便该客户端连接到对该客户端而言RTT值最小的节点服务器,流程结束。Further, it is determined whether each client needs to change the route. That is, step S206 is executed to determine whether the RTT value of a client connecting to the node server according to the route associated with the client exceeds a threshold. The route associated with the client specifies the node server the client should connect to. Follow-up operations are performed according to the judgment result. If the judgment result is yes, step S208 is triggered. If the judgment result is no, the process ends. When the RTT value exceeds the threshold, step S208 is executed. At this time, the route associated with the client is modified so that the client connects to the node server with the smallest RTT value for the client, and the process ends.
值得说明的是,本发明实施例对RTT值的计算方式为:为在客户端与节点服务器建立TCP/IP连接时,从节点服务器发出握手确认信号到收到来自客户端对握手确认信号发出的确认信号的时间间隔。图3示出了根据本发明一个实施例的RTT值计算方法的处理流程图。其具体计算方法为:TCP经过三次握手,RTT值统计第三次握手和第二次握手之间的时长。参见图3,该方法包括步骤S302至步骤S306。It is worth noting that the calculation method of the RTT value in the embodiment of the present invention is: when the client establishes a TCP/IP connection with the node server, from the node server sending the handshake confirmation signal to receiving the handshake confirmation signal from the client The time interval between acknowledgment signals. Fig. 3 shows a processing flowchart of a method for calculating an RTT value according to an embodiment of the present invention. The specific calculation method is: after three handshakes by TCP, the RTT value counts the time between the third handshake and the second handshake. Referring to Fig. 3, the method includes step S302 to step S306.
在图3所示流程中,首先执行步骤S302,当客户端与节点服务器建立TCP/IP连接时,即t0时刻,客户端发送同步序列编号(Synchronize Sequence Numbers,以下简称SYN)包到节点服务器,并进入SYN_SEND(SEND,发送)状态,等待节点服务器确认,此为第一次握手。参见图3可知,第一次握手间隔为t1-t0。In the process shown in Figure 3, step S302 is first executed. When the client establishes a TCP/IP connection with the node server, that is, at time t0, the client sends a Synchronize Sequence Numbers (SYN for short) packet to the node server, And enter the SYN_SEND (SEND, send) state, waiting for the confirmation of the node server, this is the first handshake. Referring to Fig. 3, it can be seen that the first handshake interval is t1-t0.
在第一次握手结束后,执行步骤S304,当节点服务器收到SYN包(即t1时刻),必须确认客户的SYN,同时节点服务器自己也发送一个SYN包,即SYN+ACK(Acknowledgement,确认)包,此时节点服务器就进入SYN_RECV(Receive,收到)状态,此为第二次握手。参见图3可知,第二次握手与第一次握手间隔为t2-t1。After the first handshake ends, step S304 is executed. When the node server receives the SYN packet (that is, at time t1), it must confirm the client's SYN, and at the same time, the node server itself sends a SYN packet, that is, SYN+ACK (Acknowledgment, confirmation) package, at this point the node server enters the SYN_RECV (Receive, received) state, which is the second handshake. Referring to FIG. 3, it can be seen that the interval between the second handshake and the first handshake is t2-t1.
最后,当客户端收到节点服务器的SYN+ACK包(即t3时刻),执行步骤S306,即客户端向节点服务器发送确认包ACK。当来自客户端的确认包ACK发送完毕,客户端和节点服务器进入ESTABLISHED(连接成功)状态(即t3时刻),此为第三次握手。参见图3可知,第三次握手与第二次握手间隔为t3-t2。在第三次握手完成后,根据上文的计算方式能够计算出RTT值,即第三次握手和第二次握手之间的时间间隔。Finally, when the client receives the SYN+ACK packet from the node server (that is, at time t3), step S306 is executed, that is, the client sends an acknowledgment packet ACK to the node server. When the confirmation packet ACK from the client is sent, the client and the node server enter the ESTABLISHED (successful connection) state (that is, time t3), which is the third handshake. Referring to FIG. 3, it can be seen that the interval between the third handshake and the second handshake is t3-t2. After the third handshake is completed, the RTT value can be calculated according to the above calculation method, that is, the time interval between the third handshake and the second handshake.
在第三次握手结束后,客户端和节点服务器进入数据传输阶段,客户端向节点服务器请求内容,相应的,节点服务器将内容分发到客户端。参见图3,步骤S308中提及,t3时刻之后,客户端向节点服务器发送数据(DATA)。而在步骤S310中,节点服务器在t4时刻收到DATA,在t4-t5的时刻间,返回数据确认(DATA ACK)消息至客户端。After the third handshake, the client and the node server enter the data transmission stage, the client requests content from the node server, and accordingly, the node server distributes the content to the client. Referring to FIG. 3 , it is mentioned in step S308 that after time t3, the client sends data (DATA) to the node server. In step S310, the node server receives the DATA at time t4, and returns a data acknowledgment (DATA ACK) message to the client during time t4-t5.
为将本发明实施例提供的网络路径优化方法以及装置阐述地更清楚更明白,现以具体实施例对其进行说明。In order to illustrate the network path optimization method and device provided by the embodiments of the present invention more clearly and clearly, specific embodiments are used to describe it.
实施例一Embodiment one
在本例中,具体应用环境为多个省市的用户进行网络访问的情况。为方便描述,将图1所示的上述网络系统中增加一个控制中心。控制中心有且仅有一个,用于对网络系统各部分以及整体的运行情况进行监控。In this example, the specific application environment is a situation where users from multiple provinces and cities perform network access. For convenience of description, a control center is added to the above network system shown in FIG. 1 . There is one and only one control center, which is used to monitor the operation of each part and the whole of the network system.
在本例中,网络路径优化方法的流程如下:In this example, the flow of the network path optimization method is as follows:
步骤1、统计RTT延迟;Step 1, count the RTT delay;
其中,统计的主体可以是各客户端,由各客户端自行统计后上报至控制中心,也可以是控制中心直接统计,还可以是由节点服务器进行统计后上报至控制中心。Wherein, the subject of statistics may be each client, and each client may make statistics by itself and report to the control center, or the control center may directly make statistics, or the node server may make statistics and then report to the control center.
步骤2、将监控结果上报给控制中心;Step 2, report the monitoring results to the control center;
步骤3、控制中心根据监控结果,评估计算出各个节点访问相对较慢的省市;Step 3. According to the monitoring results, the control center evaluates and calculates the provinces and cities where each node accesses relatively slowly;
其中,此处相对较慢是与预定阈值进行比较,即,控制中心会根据某个预先确定的路由的值是否超过预定阈值来确定各省市的访问速度是否较慢,进而确认是否进行更改相应的路由。Among them, the relatively slow here is compared with the predetermined threshold, that is, the control center will determine whether the access speed of each province and city is slow according to whether the value of a predetermined route exceeds the predetermined threshold, and then confirm whether to change the corresponding routing.
步骤4、对于访问相对较慢的省市,为其计算出RTT最小的节点;Step 4. For provinces and cities with relatively slow access, calculate the node with the smallest RTT;
步骤5、控制中心控制修改DNS(Domain Name System,域名解析系统)解析,将此节点解析到RTT最小的节点。Step 5. The control center controls and modifies DNS (Domain Name System, domain name resolution system) resolution, and resolves this node to the node with the smallest RTT.
步骤5中的节点最优是解析到RTT最小的节点,若在特殊情况下,RTT最小的节点不能够提供访问服务,例如,该节点硬件故障,或者机器检修或其他状态,此时可以解析到RTT次小的节点,以此类推。The optimal node in step 5 is to resolve to the node with the smallest RTT. If under special circumstances, the node with the smallest RTT cannot provide access services, for example, the node has a hardware failure, or machine maintenance or other status, then it can be resolved to The node with the second smallest RTT, and so on.
需要说明的是,本实施例中各步骤涉及的节点是上文节点服务器的简称。It should be noted that the nodes involved in the various steps in this embodiment are the abbreviations of the node server above.
图4示出了根据本发明实施例的网络路径优化的系统结构的一个示例图。如图4所示,用户为广东用户410,默认是分配到节点一420。当网络出现拥堵时,根据用户源站440(相当于前文的源站服务器)发送的数据,得到计算出的RTT值最小的节点为节点二430,则修改DNS解析,将广东用户410解析到节点二430。FIG. 4 shows an exemplary diagram of a system structure for network path optimization according to an embodiment of the present invention. As shown in FIG. 4 , the user is a Guangdong user 410 and is assigned to node one 420 by default. When the network is congested, according to the data sent by the user's origin site 440 (equivalent to the origin server above), the calculated node with the smallest RTT value is node 2 430, then modify the DNS resolution to resolve the Guangdong user 410 to the node Two 430.
实施例二Embodiment two
本实施例以用户为湖南省的用户为例,详述网络路径优化的方法。本实施例依赖于图1所示的网络系统进行实现。In this embodiment, a user in Hunan Province is taken as an example to describe a network path optimization method in detail. This embodiment is implemented relying on the network system shown in FIG. 1 .
图5示出了根据本发明一个实施例的一种网络路径优化的方法的详细流程图。参见图5,该方法至少包括步骤S502至步骤S520。Fig. 5 shows a detailed flowchart of a method for network path optimization according to an embodiment of the present invention. Referring to Fig. 5, the method at least includes step S502 to step S520.
本实施例中,湖南省用户默认分配到北京机房。此时执行步骤S502,在湖南省用户的客户端与北京机房的节点服务器建立TCP/IP连接时,计算出从节点服务器发出握手确认信号到收到来自客户端对握手确认信号发出的确认信号的时间间隔值,即RTT值。In this embodiment, users in Hunan Province are assigned to the computer room in Beijing by default. Execute step S502 now, when the client of user in Hunan Province establishes TCP/IP connection with the node server of Beijing computer room, calculate from node server send handshake confirmation signal to receive from the confirmation signal that client side sends to handshake confirmation signal Time interval value, that is, RTT value.
随后,执行步骤S504,利用节点服务器中的RTT统计单元统计源站服务器发送的各地机房返回的与湖南用户相对应的RTT值。节点服务器中的RTT统计单元对接收的多个RTT值进行统计,随后,将统计结果发送至节点服务器的RTT发送单元。在步骤S506中,节点服务器中的RTT发送单元发送步骤S504中RTT统计单元统计的所有RTT值。相应的,在步骤S508中,由RTT监控服务器中的RTT接收单元接收多个节点服务器发送的RTT值,如本发明实施例中:湖南用户访问上海机房RTT为85ms,湖南用户访问北京机房RTT为800ms。Subsequently, step S504 is executed, and the RTT statistics unit in the node server is used to count the RTT values corresponding to Hunan users sent by the origin server and returned by computer rooms in various places. The RTT statistics unit in the node server performs statistics on the received multiple RTT values, and then sends the statistical results to the RTT sending unit of the node server. In step S506, the RTT sending unit in the node server sends all the RTT values counted by the RTT statistical unit in step S504. Correspondingly, in step S508, the RTT receiving unit in the RTT monitoring server receives the RTT values sent by multiple node servers, as in the embodiment of the present invention: the RTT of Hunan users accessing the Shanghai computer room is 85ms, and the Hunan user accessing the Beijing computer room RTT is 800ms.
在RTT监控服务器接收到湖南用户与各地机房建立连接后的RTT值之后,执行步骤S510,利用RTT监控服务器中的RTT计算单元计算得到对于湖南用户客户端而言RTT值最小的节点服务器。需要说明的是,在本实施例中,RTT最小节点相对客户端而言就是其最优节点。例如,经步骤S510确认本发明实施例中的湖南用户访问上海机房RTT为80ms为所有RTT值中的最小值,则湖南用户与上海机房建立的路径就为所需要选择的网络最优路径。After the RTT monitoring server receives the RTT value after the connection between the Hunan user and the computer rooms in various places, step S510 is executed, and the RTT calculation unit in the RTT monitoring server is used to calculate the node server with the smallest RTT value for the Hunan user client. It should be noted that, in this embodiment, the minimum RTT node is the optimal node for the client. For example, after step S510 confirms that the RTT of the Hunan user accessing the Shanghai computer room in the embodiment of the present invention is 80ms, which is the minimum value among all RTT values, then the path established between the Hunan user and the Shanghai computer room is the optimal network path to be selected.
随后,在步骤S512中,网络拥堵评估单元根据与该客户端相关联的路由计算当前,湖南用户与北京机房的RTT延时是否超过预先设置的阈值,若否,执行步骤S514,若是则执行步骤S516。Subsequently, in step S512, the network congestion evaluation unit calculates currently according to the route associated with the client, whether the RTT delay between the Hunan user and the Beijing computer room exceeds a preset threshold, if not, execute step S514, and if so, execute step S516.
步骤S514、若RTT值没有超过预设阈值,确认此时路径已为最佳路径,路由无须更改,结束本流程。Step S514. If the RTT value does not exceed the preset threshold, it is confirmed that the path is the best path at this time, the route does not need to be changed, and the process ends.
步骤S516、若RTT值超过预先设置的阈值,则需要利用路由更改单元修改与该客户端相关联的路由,以便该客户端连接到对该客户端而言RTT值最小的节点服务器。本步骤中,路由更改单元向RTT计算单元发送查询请求,查询RTT最小的节点。Step S516, if the RTT value exceeds the preset threshold, it is necessary to use the route modification unit to modify the route associated with the client, so that the client can connect to the node server with the smallest RTT value for the client. In this step, the route changing unit sends a query request to the RTT calculation unit to query the node with the smallest RTT.
步骤S518在执行时,收到路由更改单元在步骤S516中发送的查询请求后,RTT计算单元将计算得出的RTT值最小的节点服务器的数据发送给路由更改单元。例如,经步骤S510确认的,对于湖南用户而言,湖南用户与上海机房间的RTT最小,因此,RTT计算单元将最小RTT值为上海机房返回的RTT值80ms发送给路由更改单元。When step S518 is executed, after receiving the query request sent by the route modification unit in step S516, the RTT calculation unit sends the calculated data of the node server with the smallest RTT value to the route modification unit. For example, as confirmed in step S510, for the Hunan user, the RTT between the Hunan user and the Shanghai computer room is the smallest. Therefore, the RTT calculation unit sends the minimum RTT value of 80ms returned by the Shanghai computer room to the routing change unit.
路由更改单元接收到RTT计算单元发送的最小RTT值后执行步骤S520。具体的,路由更改单元通过修改与该客户端相关联的DNS来修改与该客户端相关联的路由,修改与湖南用户客户端相关联的路由以便该客户端连接到对该客户端而言RTT值最小的节点服务器。至此,实现网络路径优化,流程结束。After the routing modification unit receives the minimum RTT value sent by the RTT calculation unit, step S520 is executed. Specifically, the route modification unit modifies the route associated with the client by modifying the DNS associated with the client, and modifies the route associated with the Hunan user client so that the client connects to the RTT The node server with the smallest value. So far, network path optimization is realized, and the process ends.
需要说明的是,本实施例中各步骤涉及的节点是上文节点服务器的简称。It should be noted that the nodes involved in the various steps in this embodiment are the abbreviations of the node server above.
采用了上述方法及设备,本发明实施例能够带来如下有益效果:Using the above method and equipment, the embodiments of the present invention can bring the following beneficial effects:
在本发明实施例中,可以利用RTT统计单元统计出各个客户端到该节点服务器的RTT值,进而可以利用计算RTT值选出网络最优路径。相对于现有技术中提及的网络阻塞情况,本发明实施例通过计算RTT值自动诊断,能够快速准确地选取出最优路径,避免在不稳定路径上进行网络访问,保证访问过程网络的稳定,提高用户体验。In the embodiment of the present invention, the RTT statistics unit can be used to calculate the RTT value from each client to the node server, and then the optimal path of the network can be selected by calculating the RTT value. Compared with the network congestion situation mentioned in the prior art, the embodiment of the present invention automatically diagnoses by calculating the RTT value, can quickly and accurately select the optimal path, avoid network access on an unstable path, and ensure the stability of the network during the access process , improve user experience.
进一步,本发明实施例中所计算的RTT值为两次握手的时间间隔,可以保证对于源站服务器和客户端之间响应时间计算的准确性。另外,本发明实施例中的客户端为多个分布在不同地理区域的客户端,可以保证对于任意地区用户可以随时选取最优路径,并不局限于某一或某几个指定区域内的客户端,适用面广。Further, the RTT value calculated in the embodiment of the present invention is the time interval between two handshakes, which can ensure the accuracy of the calculation of the response time between the origin server and the client. In addition, the clients in the embodiment of the present invention are multiple clients distributed in different geographic regions, which can ensure that users in any region can choose the optimal route at any time, and are not limited to clients in one or several designated regions. End, wide application.
在此处所提供的说明书中,说明了大量具体细节。然而,能够理解,本发明的实施例可以在没有这些具体细节的情况下实践。在一些实例中,并未详细示出公知的方法、结构和技术,以便不模糊对本说明书的理解。In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.
类似地,应当理解,为了精简本公开并帮助理解各个发明方面中的一个或多个,在上面对本发明的示例性实施例的描述中,本发明的各个特征有时被一起分组到单个实施例、图、或者对其的描述中。然而,并不应将该公开的方法解释成反映如下意图:即所要求保护的本发明要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说,如下面的权利要求书所反映的那样,发明方面在于少于前面公开的单个实施例的所有特征。因此,遵循具体实施方式的权利要求书由此明确地并入该具体实施方式,其中每个权利要求本身都作为本发明的单独实施例。Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.
本领域那些技术人员可以理解,可以对实施例中的设备中的模块进行自适应性地改变并且把它们设置在与该实施例不同的一个或多个设备中。可以把实施例中的模块或单元或组件组合成一个模块或单元或组件,以及此外可以把它们分成多个子模块或子单元或子组件。除了这样的特征和/或过程或者单元中的至少一些是相互排斥之外,可以采用任何组合对本说明书(包括伴随的权利要求、摘要和附图)中公开的所有特征以及如此公开的任何方法或者设备的所有过程或单元进行组合。除非另外明确陈述,本说明书(包括伴随的权利要求、摘要和附图)中公开的每个特征可以由提供相同、等同或相似目的的替代特征来代替。Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings), as well as any method or method so disclosed, may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
此外,本领域的技术人员能够理解,尽管在此所述的一些实施例包括其它实施例中所包括的某些特征而不是其它特征,但是不同实施例的特征的组合意味着处于本发明的范围之内并且形成不同的实施例。例如,在下面的权利要求书中,所要求保护的实施例的任意之一都可以以任意的组合方式来使用。Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
本发明的各个部件实施例可以以硬件实现,或者以在一个或者多个处理器上运行的软件模块实现,或者以它们的组合实现。本领域的技术人员应当理解,可以在实践中使用微处理器或者数字信号处理器(DSP)来实现根据本发明实施例的网络路径优化的装置中的一些或者全部部件的一些或者全部功能。本发明还可以实现为用于执行这里所描述的方法的一部分或者全部的设备或者装置程序(例如,计算机程序和计算机程序产品)。这样的实现本发明的程序可以存储在计算机可读介质上,或者可以具有一个或者多个信号的形式。这样的信号可以从因特网网站上下载得到,或者在载体信号上提供,或者以任何其他形式提供。The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some or all components in the device for network path optimization according to the embodiment of the present invention. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.
应该注意的是上述实施例对本发明进行说明而不是对本发明进行限制,并且本领域技术人员在不脱离所附权利要求的范围的情况下可设计出替换实施例。在权利要求中,不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元件之前的单词“一”或“一个”不排除存在多个这样的元件。本发明可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中,这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.
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CN105897581A (en) * | 2015-11-20 | 2016-08-24 | 乐视云计算有限公司 | Media file back source path determination method and device in CDN network |
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CN105634961B (en) * | 2015-12-31 | 2018-10-16 | 广州品唯软件有限公司 | Intelligent routing realization method and system |
CN105704034B (en) * | 2016-04-05 | 2019-05-24 | 网宿科技股份有限公司 | Access the method and central server of network |
CN106385455A (en) * | 2016-09-23 | 2017-02-08 | 成都知道创宇信息技术有限公司 | CDN (Content Delivery Network) mirror-based whole site lock setting method |
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CN109120468B (en) * | 2017-06-26 | 2021-09-28 | 中国电信股份有限公司 | Method, device and storage medium for obtaining end-to-end network delay |
CN108696428B (en) * | 2018-05-17 | 2020-10-27 | 北京大米科技有限公司 | Routing detection method, routing node and central server based on tunnel technology |
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