WO2011097888A1 - System and method for supporting symmetric network address translation using ipv6 transition protocol - Google Patents

System and method for supporting symmetric network address translation using ipv6 transition protocol Download PDF

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Publication number
WO2011097888A1
WO2011097888A1 PCT/CN2010/077557 CN2010077557W WO2011097888A1 WO 2011097888 A1 WO2011097888 A1 WO 2011097888A1 CN 2010077557 W CN2010077557 W CN 2010077557W WO 2011097888 A1 WO2011097888 A1 WO 2011097888A1
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mobile terminal
teredo
peer
network
terminal device
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PCT/CN2010/077557
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French (fr)
Chinese (zh)
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李辉
洪名松
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北京播思软件技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H04L45/745—Address table lookup; Address filtering
    • H04L45/748—Address table lookup; Address filtering using longest matching prefix
    • 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
    • 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
    • H04L61/2592—Translation of Internet protocol [IP] addresses using tunnelling or encapsulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to a system and method for supporting peer-to-peer network address translation, and more particularly to a system and method for supporting peer-to-peer network address translation using an IPv6 transition protocol.
  • Teredo is an IPv6 to IPv4 translation technology with one or more IPv6 or IPv4 hosts Used after IPv4 Network Address Translation (NAT) to provide address allocation and automatic tunneling between hosts for unicast IPv6 connections.
  • IPv6 traffic from the Teredo host is IPv4 Transmitted in UDP data format, when NAT supports UDP port resolution, Tered data stream can pass through NAT.
  • IPv4 IPv4 header of the protocol domain is set to 41 when the compressed IPv6 packet is sent, but the resolution of protocol 41 is not a general function of NAT, so IPv4 compressed IPv6. Communication transmissions cannot pass through normal NAT.
  • IPv6 packets In order for IPv6 data transmission to pass through single or multiple layers of NAT, IPv6 packets must be compressed into IPv4 UDP formatted data, including One for each of the IPv4 and UDP headers. UDP data is generally analyzable by NAT and can pass multiple layers of NAT.
  • NAT Network Address Translation
  • Cone NAT Refers to NAT
  • the conversion table stores a type of NAT in which the internal address and port number are mapped to the external address and port number. Once NAT The conversion table starts working, and inbound packets from any source address and port to the external address and port will be converted.
  • Restricted NAT refers to NAT
  • the conversion table stores the mapping between the internal address and port number and the external address and port number, whether it is a specific source address or a specific source address and port number. If an inbound packet from an unknown external address or port to an external destination address and port The NAT conversion table matches, then this data stream will be automatically discarded.
  • Symmetric NAT refers to mapping the same internal address and port number to different external addresses and port numbers based on external destination addresses (for outbound packets) NAT.
  • an object of the present invention is to provide a system and method for supporting peer-to-peer network address translation by using an IPv6 transition protocol, using a wireless local area network and a mobile communication network to work together in a WLAN-enabled mobile mode.
  • the communication terminal when the IPv6 network is accessed based on the Teredo protocol, the peer-to-peer NAT is traversed, and the IPv6 site is accessed through the IPv4 network.
  • the present invention provides a system for supporting peer-to-peer network address translation by using an IPv6 transition protocol, which includes a mobile terminal device, a Teredo server, a Teredo relay, a mobile communication network support node, a peer-to-peer NAT, an IPv6 host, IPv4 network, IPv6 network, mobile communication network and wireless local area network, among them,
  • the mobile terminal device is connected to the peer-to-peer NAT through a wireless local area network, and is supported by the mobile communication network and the mobile communication network to access an IPv6 host;
  • the Teredo server which connects an IPv4 network and an IPv6 network, helps address configuration of the mobile terminal device, assists between the mobile terminal devices or the mobile terminal device and IPv6 Establish a communication connection between the hosts and listen for Teredo communication;
  • the Teredo relay is connected to an IPv4 network and an IPv6 network, respectively, using a Teredo tunnel interface in IPv4. Establishing a connection between the mobile terminal devices on the network and the mobile terminal device and the IPv6 host, and transmitting data;
  • the mobile communication network support node is a network node supporting a network application in a mobile communication core network, and provides gateway and service support for the mobile terminal device;
  • the peer-to-peer NAT connecting the IPv4 of the mobile terminal device through a wireless local area network a router that maps the same internal address and port number to different external addresses and port numbers based on an external destination address (for outbound packets);
  • the IPv6 host is connected to an IPv6 network and is used to accept access by the mobile terminal device.
  • the present invention provides a method for supporting peer-to-peer network address translation by using an IPv6 transition protocol, and the method includes the following steps:
  • the mobile terminal device detects the NAT type
  • the mobile terminal device performs communication initial setting
  • the IPv6 host transmits Teredo protocol data packets to the mobile terminal device.
  • the mobile terminal device performs the communication initial setting further includes the following steps:
  • Mobile terminal equipment to Teredo via mobile communication network and Teredo relay The server sends a router request message carrying the source;
  • the server receives the router request message carrying the source sent by the mobile terminal device, and records the source address of the mobile communication network of the mobile terminal device;
  • the server sends the router advertisement message carrying the source to the mobile terminal device through the Teredo relay and the mobile communication network; the mobile terminal device receives the router advertisement message carrying the source, and completes the communication initialization setting.
  • the IPv6 host transmitting the Teredo protocol data message to the mobile terminal device further includes the following steps:
  • the Teredo relay sends a "send request control message" to the mobile terminal device through the mobile communication network;
  • the mobile terminal device receives the “send request control message” sent by the Teredo relay through the mobile communication network, and sends a “request trigger control message” to the Teredo relay through the wireless local area network and the peer NAT;
  • the Teredo relay transmits Teredo protocol data packets to the mobile terminal device through peer-to-peer NAT and wireless LAN to complete the transmission of data packets.
  • the present invention has significant advantages and technical effects.
  • the technical solution of the wireless local area network and the mobile communication network used by the present invention solves the problem of traversing peer-to-peer NAT when the WLAN-enabled mobile communication terminal accesses the IPv6 network based on the Teredo protocol, and enhances
  • the Teredo protocol supports different network environments during deployment, and utilizes their respective network features and advantages to solve the defects and problems of writing technologies and protocols in a single network environment.
  • FIG. 1 is a schematic diagram of a system architecture for supporting peer-to-peer network address translation using an IPv6 transition protocol according to the present invention
  • FIG. 2 is a flow chart of a method for supporting peer-to-peer network address translation using an IPv6 transition protocol in accordance with the present invention
  • FIG. 3 is a schematic diagram showing the structure of a router request message carrying a source according to the present invention.
  • FIG. 4 is a schematic diagram showing the structure of a router advertisement message carrying a source according to the present invention.
  • Figure 5 is a block diagram showing the structure of auxiliary source address information according to the present invention.
  • FIG. 6 is a schematic diagram showing the structure of a transmission request control message according to the present invention.
  • FIG. 7 is a schematic diagram showing the structure of a request trigger control message according to the present invention.
  • the system for supporting peer-to-peer network address translation using the IPv6 transition protocol of the present invention includes: a mobile terminal device 101, a Teredo server 102, a Teredo relay 103, a mobile communication network support node 104, a peer-to-peer NAT 105, an IPv6 host 106, an IPv4 network 107, an IPv6 network 108, a mobile communication network 109, and a wireless local area network (WLAN) 110, wherein
  • WLAN wireless local area network
  • the mobile terminal device 101 which is a WLAN-capable mobile communication terminal, is connected to the peer-to-peer NAT 105 via the wireless local area network 110, and is connected to the mobile communication network support node 104 via the mobile communication network 109 for accessing the IPv6 host 106.
  • the Teredo server 102 which is connected to the IPv4 network 107 and the IPv6 network 108, respectively, assists the address configuration of the mobile terminal device 101 and assists between the mobile terminal devices 101 or the mobile terminal devices 101 and IPv6.
  • a communication connection is established between the hosts 106.
  • the Teredo server uses the UDP 3544 port to listen for Teredo traffic.
  • Teredo relay 103 which is connected to IPv4 network 107 and IPv6 network 108 respectively, and Teredo relay is in IPv4.
  • An IPv6/IPv4 router that transmits packets between the mobile terminal devices 101 on the network 107 (using the Teredo tunnel interface) and the IPv6 host 106.
  • Teredo Relay 103 and Teredo server 102 work in conjunction to facilitate establishing a connection between mobile terminal devices 101 and with IPv6 host 106.
  • Teredor relay uses UDP The 3544 port listens for Teredo communications.
  • the mobile communication network support node 104 is a network node supporting a network application in a mobile communication core network, which is connected to the mobile terminal device 101 through the mobile communication network 109, and is connected to the IPv4 network 107 to provide gateway and service support for the mobile terminal device.
  • Peer-to-peer NAT105 IPv4 compliant with RFC 1631
  • the router connects the mobile terminal device 101 through the wireless local area network 110 and maps the same internal address and port number to different external addresses and port numbers according to an external destination address (applicable to outbound data packets).
  • the IPv6 host 106 connects to the IPv6 network 108 network and accepts access by the mobile terminal device 101.
  • the IPv4 network 107, the IPv6 network 108, the mobile communication network 109, and the wireless local area network (WLAN) 110 are information transmission channels between the mobile terminal device 101 and the IPv6 host 106, and the mobile communication network 109 includes a GPRS network or a 3G network.
  • FIG. 2 is a flow chart of a method for supporting peer-to-peer network address translation by using an IPv6 transition protocol according to the present invention.
  • the method for adaptive mail configuration of the present invention will be described in detail below with reference to FIG. 2:
  • step 201 the peer-to-peer NAT 105 is detected, and the mobile terminal device 101 passes the wireless local area network (WLAN) 110 to Teredo.
  • the server 102 sends a router request message, and according to the received router advertisement message, confirms that the network address translation router maps the same internal address and port number to different external addresses and port numbers according to the external target address;
  • the mobile terminal device 101 forwards Teredo through the mobile communication network and the Teredo relay 103.
  • the server 102 sends a router request message carrying the source.
  • a router request message carrying a source includes an IPv4 header, a UDP header, a verification code, a source, and a router request message information.
  • FIG. 5 is a schematic diagram showing the structure of source information according to the present invention. As shown in FIG. 5, the source information includes an indication type, a port number, and an IP address, and the extension value is 1.
  • Teredo The server 102 receives the router request message carrying the source sent by the mobile terminal device 101, and records the mobile communication network source address of the mobile terminal device 101, and then transmits the source of the mobile terminal device 101 to the mobile terminal device 101 through the Teredo relay 103 and the mobile communication network.
  • the router advertises the message, and the mobile terminal device 101 receives the router advertisement message carrying the source to complete the communication initialization setting;
  • a router advertisement message carrying a source includes an IPv4 header, a UDP header, a source, and Teredo bubbling information.
  • the Teredo relay 103 transmits a "send request control message" to the mobile terminal device 101 via the mobile communication network 109.
  • the format of the "send request control message" is as shown in FIG. 6;
  • the "transmission request control message" includes an IPv4 header, a UDP header, a verification code, a source, and a transmission request control message information.
  • step 205 the mobile terminal device 101 receives the "transmission request control message" sent by the Teredo relay 103 through the mobile communication network 109, and transmits a "request trigger control message” to the Teredo relay 103 through the wireless local area network 110 and the peer NAT 105.
  • the format of the "request trigger control message” is as shown in FIG. 7;
  • FIG. 7 is a schematic diagram of a request trigger control message according to the present invention.
  • the “request trigger control message” includes an IPv4 header, a UDP header, a source, and a request trigger control message information.
  • the Teredo relay 103 transmits the Teredo data to the mobile terminal device 101 via the peer NAT 105 and the wireless local area network 110 to complete the transmission of the data message.
  • the technical solution of the present invention utilizes the support WLAN mobile communication terminal, and can traverse peer-to-peer NAT when accessing the IPv6 network based on the Teredo protocol, and enhances support for different network environments when the Teredo protocol is deployed.
  • the wireless local area network and the mobile communication network work together to utilize the respective network characteristics and advantages to solve the defects and problems of writing technologies and protocols in a single network environment.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Disclosed are a system and method for supporting a symmetric Network Translation (NAT) using the Internet Protocol Version 6 (IPv6) transition protocol. After determining the symmetric NAT, a mobile terminal equipment transmits a router request message carrying origins to a Teredo server through a mobile communication network and a Teredo relay; the Teredo server records the origin address of the mobile terminal equipment in the mobile communication network, and transmits a router advertisement message carrying the origins to the mobile terminal equipment; the Teredo relay transmits a "transmission request control message" to the mobile terminal equipment through the mobile communication network; the mobile terminal equipment transmits a "request triggering control message" to the Teredo relay, and then the Teredo relay transmits a Teredo protocol data message to the mobile terminal equipment. By utilizing cooperative work between the Wireless Local Area Network (WLAN) and the mobile communication network, the present invention solves the problem that the mobile terminal equipment with WLAN functions traverses the symmetric NAT when the Teredo protocol accesses the IPv6 network, and thus enhances the support for different network environments during the Teredo protocol deployment.

Description

一种利用IPv6过渡协议支持对等网络地址转换的系统及方法  System and method for supporting peer-to-peer network address translation by using IPv6 transition protocol 技术领域Technical field
本发明涉及一种支持对等网络地址转换的系统及方法，尤其涉及一种利用IPv6过渡协议支持对等网络地址转换的系统及方法。The present invention relates to a system and method for supporting peer-to-peer network address translation, and more particularly to a system and method for supporting peer-to-peer network address translation using an IPv6 transition protocol.
背景技术Background technique
Teredo 是一项 IPv6到IPv4 转换技术，在 IPv6或 IPv4 主机位于一个或多个 IPv4网络地址转换（NAT）之后时，用来为单播 IPv6 连接提供地址分配和主机间自动隧道。来自 Teredo 主机的 IPv6 数据流是以 IPv4 UDP 数据格式发送的，当NAT 支持 UDP 端口解析时， Tered数据流能够通过 NAT。Teredo is an IPv6 to IPv4 translation technology with one or more IPv6 or IPv4 hosts Used after IPv4 Network Address Translation (NAT) to provide address allocation and automatic tunneling between hosts for unicast IPv6 connections. The IPv6 traffic from the Teredo host is IPv4 Transmitted in UDP data format, when NAT supports UDP port resolution, Tered data stream can pass through NAT.
Teredo 通过在站点内的主机之间实现 IPv6 数据包隧道来解决现今 NAT 设备缺乏IPv6到IPv4功能以及多层 NAT 配置问题，而IPv6到IPv4使用边缘设备之间的隧道。主机之间隧道给 NAT 带来了另外一个问题：IPv4 压缩的 IPv6 数据包发送时协议域的 IPv4 报头设定为41，但是协议41的解析并不是 NAT 的通用功能，所以 IPv4 压缩的 IPv6 通信传输不能通过一般的 NAT。为了使 IPv6 数据传输能够通过单个或多层 NAT， IPv6 数据包必须压缩成 IPv4 UDP 格式的数据，包含 IPv4 和 UDP 报头各一个。UDP 数据普遍能够被 NAT 解析而且能够通过多层 NAT。Teredo solves today's NAT by implementing IPv6 packet tunneling between hosts in the site The device lacks IPv6 to IPv4 functionality and multi-layer NAT configuration issues, while IPv6 to IPv4 use tunnels between edge devices. The tunnel between hosts brings another problem to NAT: IPv4 The IPv4 header of the protocol domain is set to 41 when the compressed IPv6 packet is sent, but the resolution of protocol 41 is not a general function of NAT, so IPv4 compressed IPv6. Communication transmissions cannot pass through normal NAT. In order for IPv6 data transmission to pass through single or multiple layers of NAT, IPv6 packets must be compressed into IPv4 UDP formatted data, including One for each of the IPv4 and UDP headers. UDP data is generally analyzable by NAT and can pass multiple layers of NAT.
网络地址转换 (NAT) 是指符合 RFC 1631 标准的 IPv4 路由器，它能够在发送前解析数据包 IP 地址以及 TCP/UDP 端口号。NAT的类型有：Network Address Translation (NAT) refers to an RFC 1631 compliant IPv4 router that can parse packets before sending. IP address and TCP/UDP port number. The types of NAT are:
完全（Cone）NAT： 是指在 NAT 转换表中存储了内部地址和端口号与外部地址和端口号之间映射关系的一类 NAT。一旦 NAT 转换表开始工作，来自任何源地址和端口通往外部地址和端口的入站数据包都将被转换。Cone NAT: Refers to NAT The conversion table stores a type of NAT in which the internal address and port number are mapped to the external address and port number. Once NAT The conversion table starts working, and inbound packets from any source address and port to the external address and port will be converted.
受限 NAT：指在 NAT 转换表中存储了内部地址和端口号与外部地址和端口号之间的映射，无论是特定的源地址或者特定源地址与端口号。如果从某个未知外部地址或者端口到外部目标地址和端口的入站数据包与 NAT 转换表吻合，那么此数据流将被自动放弃。Restricted NAT: refers to NAT The conversion table stores the mapping between the internal address and port number and the external address and port number, whether it is a specific source address or a specific source address and port number. If an inbound packet from an unknown external address or port to an external destination address and port The NAT conversion table matches, then this data stream will be automatically discarded.
对称 NAT：指根据外部目标地址（适用于出站数据包）将相同的内部地址和端口号映射到不同的外部地址和端口号的 NAT。Symmetric NAT: refers to mapping the same internal address and port number to different external addresses and port numbers based on external destination addresses (for outbound packets) NAT.
技术问题technical problem
对于现有的IPv6过渡协议Teredo，只支持锥形NAT和限制NAT，不能支持对等NAT，这限制了Teredo技术在特定网络环境中的部署。 For the existing IPv6 transition protocol Teredo, only tapered NAT and restricted NAT are supported, and peer-to-peer NAT cannot be supported, which limits the deployment of Teredo technology in a specific network environment.
技术解决方案Technical solution
为了解决现有技术存在的不足，本发明的目的在于提供一种利用IPv6过渡协议支持对等网络地址转换的系统及方法，采用无线局域网和移动通信网协同工作的方式，在具有WLAN功能的移动通信终端中，可以基于Teredo协议访问IPv6网络时穿越对等NAT，通过IPv4网络访问IPv6站点。In order to solve the deficiencies of the prior art, an object of the present invention is to provide a system and method for supporting peer-to-peer network address translation by using an IPv6 transition protocol, using a wireless local area network and a mobile communication network to work together in a WLAN-enabled mobile mode. In the communication terminal, when the IPv6 network is accessed based on the Teredo protocol, the peer-to-peer NAT is traversed, and the IPv6 site is accessed through the IPv4 network.
为实现上述目的，本发明提供一种利用IPv6过渡协议支持对等网络地址转换的系统，该系统包括移动终端设备，Teredo服务器，Teredo中继，移动通信网支持节点，对等NAT，IPv6主机，IPv4网，IPv6网，移动通信网和无线局域网，其中，To achieve the above object, the present invention provides a system for supporting peer-to-peer network address translation by using an IPv6 transition protocol, which includes a mobile terminal device, a Teredo server, a Teredo relay, a mobile communication network support node, a peer-to-peer NAT, an IPv6 host, IPv4 network, IPv6 network, mobile communication network and wireless local area network, among them,
所述移动终端设备，通过无线局域网与所述对等NAT连接，通过移动通信网与所述移动通信网支持节点，用于访问IPv6主机；The mobile terminal device is connected to the peer-to-peer NAT through a wireless local area network, and is supported by the mobile communication network and the mobile communication network to access an IPv6 host;
所述Teredo服务器，其连接IPv4网和IPv6网，帮助所述移动终端设备的地址配置,协助在所述移动终端设备之间或所述移动终端设备与IPv6 主机之间建立通信连接，并侦听 Teredo 通信；The Teredo server, which connects an IPv4 network and an IPv6 network, helps address configuration of the mobile terminal device, assists between the mobile terminal devices or the mobile terminal device and IPv6 Establish a communication connection between the hosts and listen for Teredo communication;
所述Teredo中继，其分别连接IPv4网和IPv6网，使用 Teredo 隧道接口在 IPv4 网上的所述移动终端设备之间、以及所述移动终端设备与IPv6 主机之间建立连接，并传送数据；The Teredo relay is connected to an IPv4 network and an IPv6 network, respectively, using a Teredo tunnel interface in IPv4. Establishing a connection between the mobile terminal devices on the network and the mobile terminal device and the IPv6 host, and transmitting data;
所述移动通信网支持节点，是移动通信核心网络中支持网络应用的网络节点，为所述移动终端设备提供网关和服务支持； The mobile communication network support node is a network node supporting a network application in a mobile communication core network, and provides gateway and service support for the mobile terminal device;
所述对等NAT，通过无线局域网连接所述移动终端设备的IPv4 路由器，其根据外部目标地址（适用于出站数据包）将相同的内部地址和端口号映射到不同的外部地址和端口号；The peer-to-peer NAT, connecting the IPv4 of the mobile terminal device through a wireless local area network a router that maps the same internal address and port number to different external addresses and port numbers based on an external destination address (for outbound packets);
所述IPv6主机，连接IPv6网，用于接受所述移动终端设备的访问。The IPv6 host is connected to an IPv6 network and is used to accept access by the mobile terminal device.
为实现上述目的，本发明提供的一种利用IPv6过渡协议支持对等网络地址转换的方法，该方法包括以下步骤：To achieve the above objective, the present invention provides a method for supporting peer-to-peer network address translation by using an IPv6 transition protocol, and the method includes the following steps:
移动终端设备检测NAT类型；The mobile terminal device detects the NAT type;
移动终端设备进行通信初始化设置；The mobile terminal device performs communication initial setting;
IPv6主机向移动终端设备传送Teredo协议数据报文。The IPv6 host transmits Teredo protocol data packets to the mobile terminal device.
进一步地，移动终端设备进行通信初始化设置还包括以下步骤：Further, the mobile terminal device performs the communication initial setting further includes the following steps:
移动终端设备通过移动通信网和Teredo中继向Teredo 服务器发送携带来源的路由器请求报文；Mobile terminal equipment to Teredo via mobile communication network and Teredo relay The server sends a router request message carrying the source;
Teredo 服务器接收移动终端设备发送的携带来源的路由器请求报文，并记录移动终端设备的移动通信网源地址；Teredo The server receives the router request message carrying the source sent by the mobile terminal device, and records the source address of the mobile communication network of the mobile terminal device;
Teredo 服务器通过Teredo中继和移动通信网向移动终端设备发送携带来源的路由器通告报文；移动终端设备接收携带来源的路由器通告报文，并完成通信初始化设置。Teredo The server sends the router advertisement message carrying the source to the mobile terminal device through the Teredo relay and the mobile communication network; the mobile terminal device receives the router advertisement message carrying the source, and completes the communication initialization setting.
更进一步地，IPv6主机向移动终端设备传送Teredo协议数据报文还包括以下步骤：Further, the IPv6 host transmitting the Teredo protocol data message to the mobile terminal device further includes the following steps:
Teredo中继通过移动通信网发送“发送请求控制报文”到移动终端设备；The Teredo relay sends a "send request control message" to the mobile terminal device through the mobile communication network;
移动终端设备通过移动通信网接收Teredo中继发送的“发送请求控制报文”，并通过无线局域网、对等NAT发送“请求触发控制报文”到Teredo中继；The mobile terminal device receives the “send request control message” sent by the Teredo relay through the mobile communication network, and sends a “request trigger control message” to the Teredo relay through the wireless local area network and the peer NAT;
Teredo中继将Teredo协议数据报文通过对等NAT、无线局域网发送到移动终端设备，完成数据报文的传输。The Teredo relay transmits Teredo protocol data packets to the mobile terminal device through peer-to-peer NAT and wireless LAN to complete the transmission of data packets.
有益效果 Beneficial effect
本发明具有显著的优点和技术效果，本发明采用的无线局域网和移动通信网协同工作的技术方案解决了具有WLAN功能的移动通信终端的基于Teredo协议访问IPv6网络时穿越对等NAT的问题，增强了Teredo协议部署时对不同网络环境的支持，利用各自的网络特点和优势，解决在单一网络环境中写有技术和协议的缺陷及问题。The present invention has significant advantages and technical effects. The technical solution of the wireless local area network and the mobile communication network used by the present invention solves the problem of traversing peer-to-peer NAT when the WLAN-enabled mobile communication terminal accesses the IPv6 network based on the Teredo protocol, and enhances The Teredo protocol supports different network environments during deployment, and utilizes their respective network features and advantages to solve the defects and problems of writing technologies and protocols in a single network environment.
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。Other features and advantages of the invention will be set forth in the description which follows,
附图说明DRAWINGS
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，并与本发明的实施例一起，用于解释本发明，并不构成对本发明的限制。在附图中：The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawing:
图1为根据本发明的利用IPv6过渡协议支持对等网络地址转换的系统架构示意图；1 is a schematic diagram of a system architecture for supporting peer-to-peer network address translation using an IPv6 transition protocol according to the present invention;
图2为根据本发明的利用IPv6过渡协议支持对等网络地址转换的方法流程图；2 is a flow chart of a method for supporting peer-to-peer network address translation using an IPv6 transition protocol in accordance with the present invention;
图3为根据本发明的携带来源的路由器请求报文构成示意图；3 is a schematic diagram showing the structure of a router request message carrying a source according to the present invention;
图4为根据本发明的携带来源的路由器通告报文构成示意图；4 is a schematic diagram showing the structure of a router advertisement message carrying a source according to the present invention;
图5为根据本发明的辅助源地址信息构成示意图；Figure 5 is a block diagram showing the structure of auxiliary source address information according to the present invention;
图6为根据本发明的发送请求控制报文构成示意图；6 is a schematic diagram showing the structure of a transmission request control message according to the present invention;
图7为根据本发明的请求触发控制报文构成示意图。FIG. 7 is a schematic diagram showing the structure of a request trigger control message according to the present invention.
本发明的实施方式Embodiments of the invention
以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。The preferred embodiments of the present invention are described with reference to the accompanying drawings, which are intended to illustrate and illustrate the invention.
图1为根据本发明的利用IPv6过渡协议支持对等网络地址转换的系统架构示意图，如图1所示，本发明的利用IPv6过渡协议支持对等网络地址转换的系统包括：移动终端设备101，Teredo服务器102，Teredo中继103，移动通信网支持节点104，对等NAT105，IPv6主机106，IPv4网107，IPv6网108，移动通信网109和无线局域网（WLAN）110，其中，1 is a schematic diagram of a system architecture for supporting peer-to-peer network address translation by using an IPv6 transition protocol according to the present invention. As shown in FIG. 1, the system for supporting peer-to-peer network address translation using the IPv6 transition protocol of the present invention includes: a mobile terminal device 101, a Teredo server 102, a Teredo relay 103, a mobile communication network support node 104, a peer-to-peer NAT 105, an IPv6 host 106, an IPv4 network 107, an IPv6 network 108, a mobile communication network 109, and a wireless local area network (WLAN) 110, wherein
移动终端设备101，为具有WLAN功能的移动通信终端，通过无线局域网110与对等NAT105连接，通过移动通信网109与移动通信网支持节点104，用于访问IPv6主机106。The mobile terminal device 101, which is a WLAN-capable mobile communication terminal, is connected to the peer-to-peer NAT 105 via the wireless local area network 110, and is connected to the mobile communication network support node 104 via the mobile communication network 109 for accessing the IPv6 host 106.
Teredo服务器102，其分别连接IPv4网107、IPv6网108，帮助移动终端设备101的地址配置以及协助在移动终端设备101之间或者移动终端设备101与IPv6 主机106之间建立通信连接。Teredo 服务器使用 UDP 3544 端口侦听 Teredo 通信。The Teredo server 102, which is connected to the IPv4 network 107 and the IPv6 network 108, respectively, assists the address configuration of the mobile terminal device 101 and assists between the mobile terminal devices 101 or the mobile terminal devices 101 and IPv6. A communication connection is established between the hosts 106. The Teredo server uses the UDP 3544 port to listen for Teredo traffic.
Teredo中继103，其分别连接IPv4网107、IPv6网108，Teredo 中继是在 IPv4 网107 上的移动终端设备101之间（使用 Teredo 隧道接口）以及与IPv6 主机106之间传送数据包的 IPv6 / IPv4 路由器。Teredo 中继103和 Teredo 服务器102协同工作，帮助在移动终端设备101之间以及与 IPv6 主机106之间建立连接。 Teredor 中继使用 UDP 3544 端口侦听 Teredo 通信。 Teredo relay 103, which is connected to IPv4 network 107 and IPv6 network 108 respectively, and Teredo relay is in IPv4. An IPv6/IPv4 router that transmits packets between the mobile terminal devices 101 on the network 107 (using the Teredo tunnel interface) and the IPv6 host 106. Teredo Relay 103 and Teredo server 102 work in conjunction to facilitate establishing a connection between mobile terminal devices 101 and with IPv6 host 106. Teredor relay uses UDP The 3544 port listens for Teredo communications.
移动通信网支持节点104，是在移动通信核心网络中支持网络应用的网络节点，其通过移动通信网109连接移动终端设备101，并连接到IPv4网107，为移动终端设备提供网关和服务支持。The mobile communication network support node 104 is a network node supporting a network application in a mobile communication core network, which is connected to the mobile terminal device 101 through the mobile communication network 109, and is connected to the IPv4 network 107 to provide gateway and service support for the mobile terminal device.
对等NAT105，为符合 RFC 1631 标准的 IPv4 路由器，通过无线局域网110连接移动终端设备101，并根据外部目标地址（适用于出站数据包）将相同的内部地址和端口号映射到不同的外部地址和端口号。Peer-to-peer NAT105, IPv4 compliant with RFC 1631 The router connects the mobile terminal device 101 through the wireless local area network 110 and maps the same internal address and port number to different external addresses and port numbers according to an external destination address (applicable to outbound data packets).
IPv6主机106，连接IPv6网108网络，接受移动终端设备101的访问。The IPv6 host 106 connects to the IPv6 network 108 network and accepts access by the mobile terminal device 101.
IPv4网107，IPv6网108，移动通信网109以及无线局域网（WLAN）110，是移动终端设备101和IPv6主机106之间的信息传输通道，移动通信网109包括GPRS网或3G网络。The IPv4 network 107, the IPv6 network 108, the mobile communication network 109, and the wireless local area network (WLAN) 110 are information transmission channels between the mobile terminal device 101 and the IPv6 host 106, and the mobile communication network 109 includes a GPRS network or a 3G network.
图2为根据本发明的利用IPv6过渡协议支持对等网络地址转换的方法流程图，下面将参考图2，对本发明的自适应邮件配置的方法进行详细描述：2 is a flow chart of a method for supporting peer-to-peer network address translation by using an IPv6 transition protocol according to the present invention. The method for adaptive mail configuration of the present invention will be described in detail below with reference to FIG. 2:
首先，在步骤201，检测对等NAT105，移动终端设备101通过无线局域网（WLAN）110向Teredo 服务器102发送路由器请求报文，并根据接收的路由器通告报文确认网络地址转换路由器是根据外部目标地址将相同的内部地址和端口号映射到不同的外部地址和端口号的对等NAT；First, in step 201, the peer-to-peer NAT 105 is detected, and the mobile terminal device 101 passes the wireless local area network (WLAN) 110 to Teredo. The server 102 sends a router request message, and according to the received router advertisement message, confirms that the network address translation router maps the same internal address and port number to different external addresses and port numbers according to the external target address;
在步骤202，移动终端设备101通过移动通信网和Teredo中继103向Teredo 服务器102发送携带来源的路由器请求报文。At step 202, the mobile terminal device 101 forwards Teredo through the mobile communication network and the Teredo relay 103. The server 102 sends a router request message carrying the source.
图3为根据本发明的携带来源的路由器请求报文构成示意图，如图3所示，携带来源的路由器请求报文包括IPv4报头、UDP报头、验证码、来源以及路由器请求报文信息。3 is a schematic diagram of a router request message carrying a source according to the present invention. As shown in FIG. 3, a router request message carrying a source includes an IPv4 header, a UDP header, a verification code, a source, and a router request message information.
图5为根据本发明的来源信息构成示意图，如图5所示，来源信息包括指示类型、端口号以及IP地址，其扩展值为1。FIG. 5 is a schematic diagram showing the structure of source information according to the present invention. As shown in FIG. 5, the source information includes an indication type, a port number, and an IP address, and the extension value is 1.
在步骤203，Teredo 服务器102接收移动终端设备101发送的携带来源的路由器请求报文，并记录移动终端设备101的移动通信网源地址，然后，通过Teredo中继103和移动通信网向移动终端设备101发送携带来源的路由器通告报文，移动终端设备101接收到该携带来源的路由器通告报文完成通信初始化设置；At step 203, Teredo The server 102 receives the router request message carrying the source sent by the mobile terminal device 101, and records the mobile communication network source address of the mobile terminal device 101, and then transmits the source of the mobile terminal device 101 to the mobile terminal device 101 through the Teredo relay 103 and the mobile communication network. The router advertises the message, and the mobile terminal device 101 receives the router advertisement message carrying the source to complete the communication initialization setting;
图4为根据本发明的携带来源的路由器通告报文构成示意图，如图4所示，携带来源的路由器通告报文包括IPv4报头、UDP报头、来源以及Teredo冒泡信息。4 is a schematic diagram of a router advertisement message carrying a source according to the present invention. As shown in FIG. 4, a router advertisement message carrying a source includes an IPv4 header, a UDP header, a source, and Teredo bubbling information.
在步骤204，当IPv6主机106要发送Teredo数据到移动终端设备101时，Teredo中继103通过移动通信网109发送“发送请求控制报文”到移动终端设备101。该“发送请求控制报文”格式如图6所示；At step 204, when the IPv6 host 106 is to send Teredo data to the mobile terminal device 101, the Teredo relay 103 transmits a "send request control message" to the mobile terminal device 101 via the mobile communication network 109. The format of the "send request control message" is as shown in FIG. 6;
图6为根据本发明的发送请求控制报文构成示意图，如图6所示，该“发送请求控制报文”包括IPv4报头、UDP报头、验证码、来源以及发送请求控制报文信息。6 is a schematic diagram showing the structure of a transmission request control message according to the present invention. As shown in FIG. 6, the "transmission request control message" includes an IPv4 header, a UDP header, a verification code, a source, and a transmission request control message information.
在步骤205，移动终端设备101通过移动通信网109接收Teredo中继103发送的“发送请求控制报文”，并通过无线局域网110、对等NAT105发送“请求触发控制报文”到Teredo中继103。该“请求触发控制报文”格式如图7所示；In step 205, the mobile terminal device 101 receives the "transmission request control message" sent by the Teredo relay 103 through the mobile communication network 109, and transmits a "request trigger control message" to the Teredo relay 103 through the wireless local area network 110 and the peer NAT 105. . The format of the "request trigger control message" is as shown in FIG. 7;
图7为根据本发明的请求触发控制报文构成示意图，如图7所示，该“请求触发控制报文”包括IPv4报头、UDP报头、来源以及请求触发控制报文信息。FIG. 7 is a schematic diagram of a request trigger control message according to the present invention. As shown in FIG. 7, the “request trigger control message” includes an IPv4 header, a UDP header, a source, and a request trigger control message information.
在步骤206，Teredo中继103将Teredo数据经过对等NAT105、无线局域网110发送到移动终端设备101，完成数据报文的传输。In step 206, the Teredo relay 103 transmits the Teredo data to the mobile terminal device 101 via the peer NAT 105 and the wireless local area network 110 to complete the transmission of the data message.
本发明的技术方案利用支持WLAN移动通信终端，可以基于Teredo协议访问IPv6网络时穿越对等NAT，增强了Teredo协议部署时对不同网络环境的支持。在本发明中，采用无线局域网和移动通信网协同工作的方式，利用各自的网络特点和优势，解决在单一网络环境中写有技术和协议的缺陷及问题。The technical solution of the present invention utilizes the support WLAN mobile communication terminal, and can traverse peer-to-peer NAT when accessing the IPv6 network based on the Teredo protocol, and enhances support for different network environments when the Teredo protocol is deployed. In the present invention, the wireless local area network and the mobile communication network work together to utilize the respective network characteristics and advantages to solve the defects and problems of writing technologies and protocols in a single network environment.
本领域普通技术人员可以理解，以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。It will be understood by those skilled in the art that the present invention is not limited to the preferred embodiments of the present invention, and the present invention is described in detail with reference to the foregoing embodiments. It is still possible to modify the technical solutions described in the foregoing embodiments, or to replace some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims (10)

  1. 一种利用IPv6过渡协议支持对等网络地址转换的系统，包括移动终端设备，Teredo服务器，Teredo中继，移动通信网支持节点，对等NAT，IPv6主机，其特征在于， A system for supporting peer-to-peer network address translation by using an IPv6 transition protocol, including a mobile terminal device, a Teredo server, a Teredo relay, a mobile communication network support node, a peer-to-peer NAT, and an IPv6 host, wherein
    所述移动终端设备，通过无线局域网与所述对等NAT连接，通过移动通信网与所述移动通信网支持节点连接，用于访问IPv6主机；The mobile terminal device is connected to the peer-to-peer NAT through a wireless local area network, and is connected to the mobile communication network support node through a mobile communication network, and is used to access an IPv6 host;
    所述Teredo服务器，其通过IPv4网和IPv6网，帮助所述移动终端设备的地址配置,协助在所述移动终端设备之间或所述移动终端设备与IPv6 主机之间建立通信连接，并侦听 Teredo 通信；The Teredo server, which assists address configuration of the mobile terminal device through an IPv4 network and an IPv6 network, and assists between the mobile terminal devices or the mobile terminal device and IPv6 Establish a communication connection between the hosts and listen for Teredo communication;
    所述Teredo中继，其分别连接IPv4网和IPv6网，使用 Teredo 隧道接口在 IPv4 网上的所述移动终端设备之间、以及所述移动终端设备与IPv6 主机之间建立连接，并传送数据；The Teredo relay is connected to an IPv4 network and an IPv6 network, respectively, using a Teredo tunnel interface in IPv4. Establishing a connection between the mobile terminal devices on the network and the mobile terminal device and the IPv6 host, and transmitting data;
    所述移动通信网支持节点，是移动通信核心网络中支持网络应用的网络节点，为所述移动终端设备提供网关和服务支持； The mobile communication network support node is a network node supporting a network application in a mobile communication core network, and provides gateway and service support for the mobile terminal device;
    所述对等NAT，通过无线局域网连接所述移动终端设备的IPv4 路由器，其根据外部目标地址将相同的内部地址和端口号映射到不同的外部地址和端口号；The peer-to-peer NAT, connecting the IPv4 of the mobile terminal device through a wireless local area network a router that maps the same internal address and port number to different external addresses and port numbers based on an external destination address;
    所述IPv6主机，连接IPv6网，用于接受所述移动终端设备的访问。 The IPv6 host is connected to an IPv6 network and is used to accept access by the mobile terminal device.
  2. 根据权利要求1所述的利用IPv6过渡协议支持对等网络地址转换的系统，其特征在于，所述移动终端设备为具有无线局域网功能的移动通信终端。The system for supporting peer-to-peer network address translation using the IPv6 transition protocol according to claim 1, wherein the mobile terminal device is a mobile communication terminal having a wireless local area network function.
  3. 一种利用IPv6过渡协议支持对等网络地址转换的方法，该方法包括以下步骤：A method for supporting peer-to-peer network address translation by using an IPv6 transition protocol, the method comprising the following steps:
    移动终端设备检测NAT类型；The mobile terminal device detects the NAT type;
    移动终端设备进行通信初始化设置；The mobile terminal device performs communication initial setting;
    IPv6主机向移动终端设备传送Teredo协议数据报文。The IPv6 host transmits Teredo protocol data packets to the mobile terminal device.
  4. 根据权利要求3所述的利用IPv6过渡协议支持对等网络地址转换的方法，其特征在于，所述移动终端设备检测NAT类型的步骤是：移动终端设备通过无线局域网向Teredo 服务器发送路由器请求报文，并根据Teredo 服务器发送的路由器通告报文确认对等NAT。The method for supporting peer-to-peer network address translation by using an IPv6 transition protocol according to claim 3, wherein the step of detecting the NAT type by the mobile terminal device is: the mobile terminal device transmits to the Teredo through the wireless local area network. The server sends a router request message and confirms the peer NAT according to the router advertisement message sent by the Teredo server.
  5. 根据权利要求3所述的利用IPv6过渡协议支持对等网络地址转换的方法，其特征在于，所述移动终端设备进行通信初始化设置的步骤，进一步包括以下步骤：The method for supporting peer-to-peer network address translation by using the IPv6 transition protocol according to claim 3, wherein the step of the mobile terminal device performing communication initialization setting further comprises the following steps:
    移动终端设备通过移动通信网和Teredo中继向Teredo 服务器发送携带来源的路由器请求报文；The mobile terminal device sends a router request message carrying the source to the Teredo server through the mobile communication network and the Teredo relay;
    Teredo 服务器接收移动终端设备发送的携带来源的路由器请求报文，并记录移动终端设备的移动通信网源地址；Teredo The server receives the router request message carrying the source sent by the mobile terminal device, and records the source address of the mobile communication network of the mobile terminal device;
    Teredo 服务器通过Teredo中继和移动通信网向移动终端设备发送携带来源的路由器通告报文；移动终端设备接收携带来源的路由器通告报文，并完成通信初始化设置。Teredo The server sends the router advertisement message carrying the source to the mobile terminal device through the Teredo relay and the mobile communication network; the mobile terminal device receives the router advertisement message carrying the source, and completes the communication initialization setting.
  6. 根据权利要求3或5所述的利用IPv6过渡协议支持对等网络地址转换的方法，其特征在于，所述携带来源的路由器请求报文包括IPv4报头、UDP报头、验证码、来源以及路由器请求报文信息。The method for supporting peer-to-peer network address translation by using the IPv6 transition protocol according to claim 3 or 5, wherein the router-requesting message carrying the source includes an IPv4 header, a UDP header, a verification code, a source, and a router request report. Text information.
  7. 根据权利要求3或5所述的利用IPv6过渡协议支持对等网络地址转换的方法，其特征在于，所述携带来源的路由器通告报文包括IPv4报头、UDP报头、来源以及Teredo冒泡信息。The method for supporting peer-to-peer network address translation by using the IPv6 transition protocol according to claim 3 or 5, wherein the router advertisement message carrying the source includes an IPv4 header, a UDP header, a source, and Teredo bubbling information.
  8. 根据权利要求3所述的利用IPv6过渡协议支持对等网络地址转换的方法，其特征在于，所述IPv6主机向移动终端设备传送Teredo协议数据报文的步骤进一步包括以下步骤：The method for supporting peer-to-peer network address translation by using the IPv6 transition protocol according to claim 3, wherein the step of transmitting the Teredo protocol data packet by the IPv6 host to the mobile terminal device further comprises the following steps:
    Teredo中继通过移动通信网发送“发送请求控制报文”到移动终端设备；The Teredo relay sends a "send request control message" to the mobile terminal device through the mobile communication network;
    移动终端设备通过移动通信网接收Teredo中继发送的“发送请求控制报文”，并通过无线局域网、对等NAT发送“请求触发控制报文”到Teredo中继；The mobile terminal device receives the “send request control message” sent by the Teredo relay through the mobile communication network, and sends a “request trigger control message” to the Teredo relay through the wireless local area network and the peer NAT;
    Teredo中继将Teredo协议数据报文通过对等NAT、无线局域网发送到移动终端设备，完成数据报文的传输。The Teredo relay transmits Teredo protocol data packets to the mobile terminal device through peer-to-peer NAT and wireless LAN to complete the transmission of data packets.
  9. 根据权利要求8所述的利用IPv6过渡协议支持对等网络地址转换的方法，其特征在于，所述发送请求控制报文包括IPv4报头、UDP报头、验证码、来源以及发送请求控制报文信息；所述请求触发控制报文包括IPv4报头、UDP报头、来源以及请求触发控制报文信息。The method for supporting a peer-to-peer network address translation by using an IPv6 transition protocol according to claim 8, wherein the sending request control message includes an IPv4 header, a UDP header, a verification code, a source, and a request control message information; The request trigger control message includes an IPv4 header, a UDP header, a source, and a request trigger control message information.
  10. 根据权利要求6、7或9任意一项所述的利用IPv6过渡协议支持对等网络地址转换的方法，其特征在于，所述来源包括指示类型、端口号以及IP地址，其扩展值为1。The method for supporting peer-to-peer network address translation by using an IPv6 transition protocol according to any one of claims 6, 7 or 9, wherein the source includes an indication type, a port number, and an IP address, and the extension value is 1.
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