WO2014019516A1 - Procédé et dispositif de transfert de message - Google Patents

Procédé et dispositif de transfert de message Download PDF

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Publication number
WO2014019516A1
WO2014019516A1 PCT/CN2013/080530 CN2013080530W WO2014019516A1 WO 2014019516 A1 WO2014019516 A1 WO 2014019516A1 CN 2013080530 W CN2013080530 W CN 2013080530W WO 2014019516 A1 WO2014019516 A1 WO 2014019516A1
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WO
WIPO (PCT)
Prior art keywords
request message
forwarding rule
address
resource
edge router
Prior art date
Application number
PCT/CN2013/080530
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English (en)
Chinese (zh)
Inventor
胡寅亮
王东辉
张锦辉
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2014019516A1 publication Critical patent/WO2014019516A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2521—Translation architectures other than single NAT servers
    • H04L61/2525—Translation at a client
    • 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
    • H04L67/56—Provisioning of proxy services
    • H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/21—Monitoring or handling of messages
    • H04L51/214—Monitoring or handling of messages using selective forwarding

Definitions

  • the present invention relates to the field of communications, and in particular, to a packet forwarding method and device.
  • Cache transparent Cache
  • cache devices In order to reduce the impact of network video traffic on the carrier network, operators actively deploy transparent Cache (cache), deploy transparent cache devices near the user side to obtain and cache hot content.
  • the user request is redirected or forwarded to the cache device.
  • the cache device If the cache device has already cached the resource, the cache device spoofs the server directly to the user, because the user no longer needs to go to the remote web.
  • Server web server
  • the cache device is closer to the user, thereby improving the user download speed and improving the user experience quality.
  • each edge router needs to select a suitable cache device.
  • each edge router needs to obtain the load of all the cache devices or cache the path of the device to the user and determine the appropriate cache device by calculation.
  • the repetitive acquisition and calculation of each edge router not only increases the data.
  • the delay of the transmission increases the loss of the system.
  • the preference principles of the edge routers are inconsistent because each edge router independently selects a suitable cache device. Summary of the invention
  • the embodiments of the present invention provide a packet forwarding method and a device, which are configured to solve the problem that the edge router selects the cache device inconsistently and repeatedly obtains the cache resource configuration information, and the network resource transmission delay is large and the system loss is large. The problem.
  • the first aspect provides a method for packet forwarding, including:
  • the edge router receives the first request packet sent by the user equipment, and the first request packet carries the uniform resource locator URL of the resource requested by the user equipment;
  • the edge router After determining that the first request packet matches the first forwarding rule, the edge router sends a second request packet to the cache management device;
  • the edge router receives the response packet sent by the cache management device for the second request packet, where the response packet carries the IP address of the target cache device selected by the cache management device; the edge router caches according to the target The IP address of the device requests the resource requested by the client device from the target cache device.
  • the matching element of the first forwarding rule includes a URL of a resource requested by the user equipment;
  • the matching element of the first forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, and a transport layer protocol number of the first request packet.
  • the second request packet carries the URL
  • the second request packet carries an IP address or a domain name of a server that provides the resource, and carries a local resource identifier of the resource on the server.
  • the method further includes: combining the first aspect or the first possible implementation manner or the second possible implementation manner, the method further includes:
  • the edge forwarding router configures a second forwarding rule for the packet sent by the user equipment, where the forwarding destination device corresponding to the second forwarding rule is the target Cache device
  • the number of matching elements of the second forwarding rule is greater than the matching element of the first forwarding rule quantity
  • the edge router determines that the packet received from the user equipment matches both the first forwarding rule and the second forwarding rule, the edge router forwards according to the second forwarding rule.
  • the matching element of the second forwarding rule includes a destination IP address of the first request packet, and the first request a destination port number of the packet, a transport layer protocol number of the first request packet, a source IP address of the first request message, and a source port number of the first request message;
  • the matching element of the second forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, a transport layer protocol number of the first request packet, and the first The source IP address of a request message;
  • the matching element of the second forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, a transport layer protocol number of the first request packet, and the first The source port number of a request message.
  • the second forwarding rule is that after the edge router receives the response packet, and determines the user end After the device obtains the resource requested by the first request message from the target cache device by using the transmission control protocol TCP, the device is configured.
  • an edge router including:
  • a first receiving unit configured to receive a first request message sent by the user equipment, where the first request message carries a uniform resource locator URL of the resource requested by the user equipment;
  • a first sending unit configured to send a second request message to the cache management device after determining that the first request message matches the first forwarding rule
  • the response receiving unit is configured to receive a response message for the second request message sent by the cache management device, where the response message carries an IP address of a target cache device selected by the cache management device, and a request unit, configured to The IP address of the target cache device requests the target cache device for the resource requested by the client device.
  • the matching element of the first forwarding rule includes a URL of the resource requested by the user equipment; or
  • the matching element of the first forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, and a transport layer protocol number of the first request packet.
  • the second request packet carries the URL
  • the second request packet carries an IP address or a domain name of the server that provides the resource, and also carries a local resource identifier of the resource on the server.
  • the edge router further includes:
  • a configuration unit configured to: after the response receiving unit receives the response message, configure a second forwarding rule for the packet sent by the user equipment, where the forwarding destination device corresponding to the second forwarding rule is the target a cache device, where the number of matching elements of the second forwarding rule is greater than the number of matching elements of the first forwarding rule;
  • the packet forwarding unit is configured to perform forwarding according to the second forwarding rule after determining that the packet received from the user equipment matches both the first forwarding rule and the second forwarding rule.
  • the configuration unit is configured to: after the edge router receives the response packet, and determine the user end After the device obtains the resource requested by the first request packet from the target cache device by using the transmission control protocol TCP, the second forwarding rule is configured.
  • the edge router selects a corresponding cache device request resource for the user equipment according to the request packet sent by the user equipment, so that not only the cache device is guaranteed. Consistency of principles, while reducing the delay of network resource transmission and reducing system loss.
  • FIG. 1 is a schematic flowchart of a method for forwarding a packet according to an embodiment of the present disclosure
  • 2 is a schematic flowchart of a method for forwarding a packet according to another embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an edge router according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of another edge router according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an edge router according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a system for packet forwarding according to an embodiment of the present invention.
  • the embodiment of the invention provides a method for packet forwarding, as shown in FIG. 1 , which includes the following steps:
  • the edge router receives the first request packet sent by the user equipment, where the first request packet carries a uniform resource locator (URL) of the resource requested by the user equipment.
  • URL uniform resource locator
  • the edge router After determining that the first request packet matches the first forwarding rule, the edge router sends a second request packet to the cache management device.
  • the matching element of the first forwarding rule includes a URL of the resource requested by the user equipment, or the matching element of the first forwarding rule includes a destination IP address of the first request packet and a destination of the first request packet.
  • the port number and the transport layer protocol number of the first request message are included in the matching element of the first forwarding rule.
  • the matching element of the first forwarding rule configured by the edge router includes the URL of the resource requested by the user equipment, and the cache device management processing is performed on the video request corresponding to the site information video.xyz.com.
  • the Uniform Resource Locator URL of the resource requested by the user equipment is HTTP: ⁇ video. xyz.eom/a.flv, and the video address is video.
  • the video content of xyz.com is requested. Therefore, the edge router sends a second request message to the cache management device according to the site video.xyz.com, requesting the cache management device to allocate a cache device for the current request of the client device.
  • the matching element of the first forwarding rule configured by the edge router may also be a destination IP address including the first request packet, a destination port number of the first request packet, and a transport layer protocol number of the first request packet.
  • the first forwarding rule is to add a triple list, namely:
  • the destination address, destination port number, and transport layer protocol number are as follows: Destination address: IP address of the network resource site, destination port number: 80 (that is, the port number of the HTTP protocol), and transport layer protocol: 6 (that is, the TCP protocol).
  • the destination address, the destination port number, and the transport layer protocol of the first request message are consistent with the triple list set by the foregoing (ie, the IP address of the request information network resource site, the destination port number is 80, and the transport layer protocol is 6) Then, the second request is sent to the cache management device.
  • the second request message is a message that is regenerated by the edge router according to the first request message; or the second request message is the first request message that is forwarded by the edge router.
  • the second request packet carries the Uniform Resource Locator URL of the resource requested by the user equipment; or the second request packet carries the IP address of the server providing the resource and the local resource identifier of the resource on the server.
  • the edge router receives the response packet sent by the cache management device for the second request packet, where the response packet carries the IP address of the target cache device selected by the cache management device.
  • the edge router requests, from the target cache device, the resource requested by the user equipment according to the IP address of the target cache device.
  • the edge router selects a corresponding cache device request resource for the user equipment according to the request packet sent by the user equipment, so that the priority principle of the cache device is ensured. Consistency, while reducing the delay of network resource transmission and reducing system loss.
  • the embodiment of the invention provides a method for packet forwarding, as shown in FIG. 2, which specifically includes the following steps:
  • the edge router receives the first request packet sent by the user equipment, where the first request packet carries a uniform resource locator (URL) of the resource requested by the user equipment.
  • URL uniform resource locator
  • the edge router After determining that the first request packet matches the first forwarding rule, the edge router sends a second request packet to the cache management device.
  • the matching element of the first forwarding rule includes a URL of the resource requested by the user equipment, or the matching element of the first forwarding rule includes a destination IP address of the first request packet and a destination of the first request packet.
  • the port number and the transport layer protocol number of the first request message are included in the matching element of the first forwarding rule.
  • the matching element of the first forwarding rule configured by the edge router includes the URL of the resource requested by the user equipment, and the cache device management processing is performed on the video request corresponding to the site information video.xyz.com.
  • a request message carries the Uniform Resource Locator URL of the resource requested by the client device as HTTP: ⁇ video. xyz.eom/a.flv, and is found to be the video content of the video site video.xyz.com a.flv
  • the request is made. Therefore, the edge router sends a second request message to the cache management device according to the site video.xyz.com, requesting the cache management device to allocate a cache device for the current request of the client device.
  • the matching element of the first forwarding rule configured by the edge router may also be a destination IP address including the first request packet, a destination port number of the first request packet, and a transport layer protocol number of the first request packet. That is, the first forwarding rule is to add a triple list, namely: destination address, destination port number, and transport layer protocol number, as follows: Destination address: IP address of the network resource site, destination port number: 80 (ie, HTTP protocol) Port number), transport layer protocol: 6 (ie TCP protocol), the destination address, destination port number and transport layer protocol of the first request message are consistent with the triple list set above (ie, the request information network resource The IP address of the site, the destination port number is 80, and the transport layer protocol is 6), and the second request is sent to the cache management device.
  • a triple list namely: destination address, destination port number, and transport layer protocol number, as follows: Destination address: IP address of the network resource site, destination port number: 80 (ie, HTTP protocol) Port number), transport layer protocol: 6 (ie T
  • the second request message is a message that is regenerated by the edge router according to the first request message; or the second request message is the first request message that is forwarded by the edge router.
  • the second request packet carries a uniform resource locator URL of the resource requested by the user equipment; or the second request packet carries the IP address and the domain name of the server that provides the resource, and carries the resource and the local resource on the server.
  • Resource ID For example, for HTTP: ⁇ video. xyz. com/a. flv, video.xyz.com is the domain name and a.flv is the local resource identifier.
  • the cache management device receives the second request packet sent by the edge router.
  • the edge router receives the response packet sent by the cache management device for the second request packet, where the response packet carries the IP address of the target cache device selected by the cache management device.
  • the cache management device determines the target cache device from the cache device according to the resource configuration information of the cache device connected thereto and the second request message.
  • the cache management device first parses the uniform resource locator URL of the resource requested by the user equipment carried by the second request packet from the second request packet; or the second request packet carries the server that provides the resource. The IP address and the local resource identifier of the resource on the server, and then the cache management device selects the cache device with the smallest load as the target cache device according to the load information of the cache device.
  • the cache management device may also not be shared according to the load. The principle of selecting the target cache device.
  • the edge router requests, from the target cache device, the resource requested by the user equipment according to the IP address of the target cache device.
  • the target cache device After receiving the packet forwarded by the edge router, the target cache device parses the Uniform Resource Locator URL of the resource requested by the user equipment.
  • the target cache device sends the requested resource determined according to the URL to the client device.
  • the target cache device parses the message to obtain the Uniform Resource Locator URL of the resource requested by the client device: HTTP: ⁇ video.xyz.eom/a.flv, and find that the client device requests video.xyz.com The a.flv video file of the site, the target cache device checks whether the video resource is stored locally;
  • the target cache device requests the resource from the resource server (the resource server is the Video Server video server) according to the original request message, and the process sends a request message to the video server for the target cache device, and receives the Video Server response. After the user requests, the video resources obtained from the Video Server are locally cached and sent to the client device.
  • the target cache device when the target cache device sends the network resource to the user equipment, the source address of the packet encapsulating the network resource is set as the IP address of the network resource site, and the destination address is set as the IP address of the user equipment,
  • the client device receives the network resource, because the source address of the network resource is the IP address of the network resource site, the client device does not know that the cache management device and the target cache device exist in the process of forwarding the network resource.
  • the device realizes transparent transmission of information of the client device by the cache management device and the target cache device, and at the same time, avoids attacks on the target cache device by the attacker, and ensures the security of information transmission.
  • step 208 The edge router configures a second forwarding rule for the packet sent by the user equipment, and the forwarding destination device corresponding to the second forwarding rule is the target cache device. It should be noted that step 208 can also be performed before step 205, 206 or 207.
  • the number of matching elements of the second forwarding rule is greater than the number of matching elements of the first forwarding rule.
  • the matching element of the second forwarding rule includes the destination IP address of the first request packet. Address, the destination port number of the first request message, the transport layer protocol number of the first request message, the source IP address of the first request message, and the source port number of the first request message;
  • the matching element of the second forwarding rule includes a destination ip address of the first request packet, a destination port number of the first request packet, a transport layer protocol number of the first request packet, and a source IP address of the first request packet;
  • the matching element of the second forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, a transport layer protocol number of the first request packet, and a source port number of the first request packet.
  • the edge router determines that the packet received from the user equipment matches the first forwarding rule and the second forwarding rule, the packet is forwarded according to the second forwarding rule.
  • the second forwarding rule is to add a quintuple list, that is, the matching element includes: a source address (a source IP address of the first request message), a source port number (a source port number of the first request message), Destination address (destination IP address of the first request packet), destination port number (destination port number of the first request packet), and transport layer protocol (transport layer protocol number of the first request packet), the quintuple information
  • the message that is consistent with the quintuple list information set above and that matches the first forwarding rule is sent to the target cache device according to the address of the target cache device.
  • the edge router configures the second forwarding rule after receiving the response packet, and after determining that the user equipment acquires the resource of the first request message request from the target cache device by using the transmission control protocol TCP. .
  • the edge router may generate the user equipment in the process of acquiring the requested resource through the TCP.
  • the TCP response message is directly forwarded to the target cache device, reducing the impact on other devices.
  • the edge router selects a corresponding cache device request resource for the user equipment according to the request packet sent by the user equipment, so that the priority principle of the cache device is not only ensured. Sex, while reducing the delay of network resource transmission and reducing system loss.
  • An embodiment of the present invention provides an edge router 3 having some or all of the functions of the edge router in the embodiment shown in FIG. 1 or FIG. 2. As shown in Figure 3, the side The edge router 3 includes:
  • the first receiving unit 31 is configured to receive a first request message sent by the user equipment, where the first request message carries a uniform resource locator (URL) of the resource requested by the user equipment;
  • URL uniform resource locator
  • the first sending unit 32 is configured to send a second request message to the cache management device after determining that the first request message matches the first forwarding rule;
  • the matching element of the first forwarding rule includes a URL of the resource requested by the user equipment;
  • the matching element of the first forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, and a transport layer protocol number of the first request packet.
  • the response receiving unit 33 is configured to receive a response message sent by the cache management device for the second request message, where the response message carries an IP address of the target cache device selected by the cache management device.
  • the requesting unit 34 is configured to request, from the target cache device, the resource requested by the client device according to the IP address of the target cache device.
  • the second request packet carries a unified resource locator URL of the resource requested by the user equipment
  • the second request message carries the IP address or domain name of the server providing the resource, and also carries the local resource identifier of the resource on the server.
  • the edge router 3 further includes:
  • the configuration unit 35 is configured to: after the response receiving unit receives the response message, configure a second forwarding rule for the packet sent by the user equipment, where the forwarding destination device corresponding to the second forwarding rule is the target cache device, where the second The number of matching elements of the forwarding rule is greater than the number of matching elements of the first forwarding rule;
  • the packet forwarding unit 36 is configured to perform forwarding according to the second forwarding rule after determining that the packet received from the user equipment matches both the first forwarding rule and the second forwarding rule.
  • the configuration unit 34 is further configured to: after the edge router receives the response packet, and after determining that the user equipment acquires the resource requested by the first request packet from the target cache device by using the transmission control protocol TCP, configuring the second forwarding rule.
  • the edge router provided by the foregoing embodiment can select a corresponding cache device request resource for the user equipment by using the request packet sent by the user equipment. In this way, not only the consistency of the cache device preference principle is ensured, but also the delay of network resource transmission is reduced and the loss of the system is reduced.
  • An embodiment of the present invention provides an edge router 5.
  • the edge router 5 includes: at least one ingress port 51, at least one egress port 52, at least one processor 53 and at least one memory 54.
  • the ingress port 51, the egress port 52, the processor 53 and the memory 54 cooperate to perform some or all of the operations performed by the edge router in the embodiment shown in Fig. 1 or Fig. 2.
  • the at least one ingress port 51 may be configured to receive a first request message sent by the user equipment, where the first request message carries a uniform resource locator (URL) of the resource requested by the user equipment.
  • URL uniform resource locator
  • the at least one egress port 52 can be configured to send a second request message to the cache management device after the at least one processor 53 determines that the first request message matches the first forwarding rule.
  • the at least one ingress port 51 may further receive a response packet sent by the cache management device for the second request packet, where the response packet carries an IP address of the target cache device selected by the cache management device.
  • the at least one egress port 52 may further request, by the target cache device, the resource requested by the user equipment according to the IP address of the target cache device.
  • the matching element of the first forwarding rule includes a URL of the resource requested by the user equipment; or the matching element of the first forwarding rule includes a destination IP address of the first request packet, and the first request ⁇ The destination port number of the message and the transport layer protocol number of the first request message.
  • the second request message carries the URL; or the second request message carries an IP address or a domain name of a server that provides the resource, and carries a local resource identifier of the resource on the server.
  • the at least one processor 53 configures, in the at least one memory 54, a second forwarding rule for the packet sent by the user equipment,
  • the forwarding destination device corresponding to the second forwarding rule is the target cache device.
  • the number of matching elements of the second forwarding rule is greater than the number of matching elements of the first forwarding rule.
  • the edge router determines that the packet received from the user equipment matches both the first forwarding rule and the second forwarding rule, the edge router forwards according to the second forwarding rule.
  • the second forwarding rule is that the edge router receives the response packet, and determines that the user equipment acquires the first request packet from the target cache device by using a transmission control protocol TCP.
  • TCP transmission control protocol
  • the matching element of the second forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, a transport layer protocol number of the first request packet, and the a source IP address of the request packet and a source port number of the first request packet; or
  • the matching element of the second forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, a transport layer protocol number of the first request packet, and the first The source IP address of a request message;
  • the matching element of the second forwarding rule includes a destination IP address of the first request packet, a destination port number of the first request packet, a transport layer protocol number of the first request packet, and the first The source port number of a request message.
  • the edge router provided in this embodiment can select a corresponding cache device request resource for the user equipment according to the request packet sent by the user equipment, so that not only the consistency of the cache device preference principle but also the reduction is ensured.
  • the edge router provided in the foregoing embodiments may be applied to the packet forwarding system provided in FIG. 6.
  • the system includes a cache management device 601, a target cache device 602, and a client device 604, respectively, and a target cache device 602 and a client device.
  • 604 and the edge router 603 connected to the cache management device 601, and the edge router 603 routes the edge of the edge in the above embodiment.
  • the resource server 605 and other cache devices 606 are shown in detail in FIG.
  • the edge router can select a corresponding cache device request resource for the user equipment according to the request packet sent by the user equipment, so that the priority of the cache device is consistent. Sex, while reducing the delay of network resource transmission and reducing system loss.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Des modes de réalisation de la présente invention, qui se rapportent au domaine technique de la transmission d'informations dans des réseaux, concernent un procédé et un dispositif de transfert de message qui résolvent le problème d'un grand retard de transmission de ressources de réseau et d'une grande perte de système qui sont causés par l'incohérence des principes selon lesquels des routeurs de périphérie sélectionnent des dispositifs cache et par l'obtention à maintes reprises des informations de configuration de ressource de chaque dispositif cache. Le procédé consiste à : recevoir un premier message de demande d'un dispositif client; après une détermination que le premier message de demande correspond à une première règle de transfert, envoyer un second message de demande à un dispositif de gestion de cache; recevoir le message de réponse pour le second message de demande envoyé par le dispositif de gestion de cache, le message de réponse transportant l'adresse IP du dispositif cache cible sélectionné par le dispositif de gestion de cache; et le routeur de périphérie demande une ressource au dispositif cache cible selon l'adresse IP du dispositif cache cible. Des modes de réalisation de la présente invention s'appliquent au transfert de messages.
PCT/CN2013/080530 2012-08-02 2013-07-31 Procédé et dispositif de transfert de message WO2014019516A1 (fr)

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CN201210273271.5 2012-08-02
CN201210273271.5A CN103581765B (zh) 2012-08-02 2012-08-02 一种报文转发的方法和设备

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