WO2013170562A1 - 一种自动选择IPv6地址传输方式的方法、设备和系统 - Google Patents

一种自动选择IPv6地址传输方式的方法、设备和系统 Download PDF

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Publication number
WO2013170562A1
WO2013170562A1 PCT/CN2012/081726 CN2012081726W WO2013170562A1 WO 2013170562 A1 WO2013170562 A1 WO 2013170562A1 CN 2012081726 W CN2012081726 W CN 2012081726W WO 2013170562 A1 WO2013170562 A1 WO 2013170562A1
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WIPO (PCT)
Prior art keywords
address
mobile terminal
ipv6
ggsn
terminal device
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PCT/CN2012/081726
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English (en)
French (fr)
Inventor
刘伟鹏
赵永刚
温海龙
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/401,991 priority Critical patent/US9344402B2/en
Priority to EP12876914.8A priority patent/EP2852111B1/en
Publication of WO2013170562A1 publication Critical patent/WO2013170562A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5007Internet protocol [IP] addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00Indexing scheme associated with group H04L61/00
    • H04L2101/60Types of network addresses
    • H04L2101/618Details of network addresses
    • H04L2101/659Internet protocol version 6 [IPv6] addresses

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, device, and system for automatically selecting an IPv6 address transmission method. Background technique
  • IPv4 address of the Internet Protocol (IP) available on the Internet (Internet) faces a serious shortage.
  • IPv4 addresses have been delivered to all continents' address agencies, which means that IPv4 addresses are exhausted and no address allocation is available.
  • IPv6 officially went to the center of the stage.
  • IPv6 has become the shared basic protocol for the Internet and mobile communication networks.
  • Mobile IPv6 enables the integration of the Internet and mobile communication networks, providing a ubiquitous and "always on" connection. If a mobile terminal device such as a mobile phone or a data card needs to access the Internet through IPv6, the IPv6 address-based packet data protocol context (PDP Context) bearer between the UE and the GGSN needs to be established by dialing.
  • PDP Context packet data protocol context
  • the Internet can only be accessed after the wireless device obtains the IPv6 address and the Domain Name System (DNS) address, and the 3GPP protocol establishes relevant standards and procedures for the process of terminal dialing to obtain an IPv6 address.
  • DNS Domain Name System
  • the 3GPP protocol states that an IPv6 address is composed of a prefix and an interface identifier, where the upper 64 bits are prefixes and the lower 64 bits are interface identifiers.
  • the IPv6 address allocation process is slightly different from IPv4 and is done using the Stateless Address Auto configuration (Stateless Address Auto configuration).
  • Stateless Address Auto configuration Stateless Address Auto configuration
  • the interface identifier and prefix are all allocated by the network in two phases.
  • the first phase of the mobile phone or data card is obtained from the Gateway General Packet Radio Service (GPRS) Support Node (GGSN). Its interface identification, this phase is achieved through the process of PDP context activation.
  • GPRS Gateway General Packet Radio Service
  • a mobile terminal device such as a mobile phone or a data card obtains an address prefix required for a global IPv6 address from the GGSN by using a route request (RS) and a route advertisement (RA) message.
  • RS route request
  • RA route advertisement
  • the mobile terminal such as the mobile phone or the data card uses the prefix carried by the router advertisement message and the previously received interface identifier to form its own global IPv6 unicast address, and the mobile terminal can also generate the prefix and local generation carried by the router advertisement message.
  • the interface identifier builds its own global IPv6 unicast address. In this way, the mobile terminal can communicate with other hosts in the external data network using the global IPv6 address.
  • such devices For terminal devices that can support multiple users (such as ZTE's UI, CPE), such devices generally have a wireless wide area port (WAN port) and a LAN port (LAN port), where the WAN port
  • the wireless technology such as 2G/3G is connected to the Internet
  • the LAN port provides network access for the access users of the terminal device through wired or wireless means.
  • the address of the WAN port is generally the address assigned by the GGSN
  • the address of the LAN port is generally a local area address of the LAN (such as 192.168.0.1).
  • the IP address of the access user terminal is on the same network segment as the LAN port.
  • the network address translation is used to convert the internal network IP to the external network IP to ensure access to the user.
  • the terminal device can normally access the IPv4 network.
  • IPv6 mode the address of the WAN port is still the address allocated by the GGSN.
  • the NAT end-to-end communication model is broken due to NAT, and a single point of failure is easy to occur.
  • the route forwarding mode is preferred. This method requires special processing on the addresses of the WAN port and the LAN port. For details, refer to the "Method and Wireless Device for Implementing Route Transmission Based on a Single IPv6 Address Prefix" (201110313190.9). The method is to allocate 64 bits from the GGSN.
  • the IPv6 address of the prefix length is divided into a 126-bit IPv6 address prefix, and then one of the 126-bit prefixes is assigned to the WAN port, and the WAN port address prefix is set to 126; and then the remaining 64-bit prefix length is IPv6.
  • An address different from the WAN port is assigned to the LAN port, and the 64-bit IPv6 prefix of the LAN port is notified to the terminal of the accessed user by means of a route advertisement (RA) by means of stateless address configuration.
  • RA route advertisement
  • EUI-64 a complete IPv6 global unicast address is constructed, and IPv6 data between the LAN port and the WAN port is routed and forwarded, so that the terminal device of the access user can normally access the IPv6 network.
  • the GGSN device is required to assign a unique identifier to the terminal device.
  • the terminal device must use the unique identifier sent by the GGSN in the IPv6 address configuration process.
  • the prefix of the IP address is obtained through RA.
  • the GGSN device is required to assign a unique prefix to the terminal device.
  • the terminal device must use the unique prefix sent by the GGSN during the IP address configuration process.
  • the IP address can be identified by the GGSN.
  • the sending or terminal device itself is obtained in the manner of EUI-64.
  • EUI-64 is a 64-bit extended unique identifier (64-bit extended unique identifier), which is generated by a specific algorithm conversion of the MAC address.
  • the GGSN device uses the method of assigning a unique prefix
  • the address of the IPv6 packet sent by the mobile terminal device must use the prefix information allocated by the GGSN, otherwise the network cannot be accessed normally.
  • the mobile terminal device only needs to advertise the 64-bit prefix information allocated by the GGSN to the access user terminal device in the RA mode by using the stateless address configuration technology, and at the same time, the route between the LAN port and the WAN port is used. The method of forwarding, so in this case, the access user terminal device can normally access the IPv6 network.
  • the address of the IPv6 address sent by the mobile terminal device must use the identifier information allocated by the GGSN, otherwise the normal access cannot be performed.
  • a traditional or driver-free data card, etc. can be installed on an access user terminal device by using a specific client, through an interface command between the data terminal device (DTE) and the data communication device (DCE) (ATtention Command, AT) or Qualcomm.
  • the QoS interface assigned by the GGSN is obtained by the Qualcomm Messaging Interface (QMI) between the platform and the terminal device, and then the IP address of the device is set to the same address.
  • QMI Qualcomm Messaging Interface
  • the modem uses the data bridging method.
  • the transparent transmission of IPv6 data sent by the access user ensures the access of the IPv6 network.
  • terminal devices that allow multiple IPv6 users to access, such as portable broadband wireless access devices (UFI or MIFI, ie mini wifi), and Customer Premise Equipment (CPE), etc.
  • UFI or MIFI, ie mini wifi portable broadband wireless access devices
  • CPE Customer Premise Equipment
  • the IPv6 address of the user equipment is not the same as that of the GGSN. Therefore, the IPv6 address identifier sent by the mobile terminal device to the GGSN packet is the same as that sent by the GGSN. In this case, the mobile terminal devices such as UFI and CPE cannot work normally.
  • the mobile terminal device needs to first confirm the mode of the operator's IPV6 address allocation before development and production, and use different IPv6 address transmission modes for different allocation methods; After the allocation mode of the GGSN device is changed, the terminal device needs to be upgraded and replaced.
  • the terminal device For a terminal device that can support multiple users, such as UFI and CPE, when the GGSN is assigned a unique identifier, the terminal device cannot support multiple users to access and perform IPv6 network access at the same time.
  • the present invention provides a method, device, and system for automatically selecting an IPv6 address transmission mode, which can automatically identify an IPv6 address allocation mode currently supported by the GGSN device.
  • the method for automatically selecting an IPv6 address transmission method of the present invention includes:
  • the GPRS support node GGSN device of the GGSN device is configured to increase the identifier of the currently used address allocation mode and notify the mobile terminal. After completing the packet data protocol PDP context activation, the mobile terminal device obtains the IPv6 delivered by the GGSN device. Address identification information;
  • the mobile terminal device sends a standard routing request RS message to the GGSN device, where the GGSN device is Responding to the allocated IPv6 address prefix information to the mobile terminal device, and attaching the currently used address allocation mode;
  • the mobile terminal device parses the current address allocation manner sent by the GGSN device, and determines whether the current address allocation mode is a unique identifier or a unique prefix, and then performs corresponding processing.
  • the GGSN device adds an identifier of the currently used address allocation manner to the route advertisement RA message.
  • the GGSN device responds to the allocated IPv6 address prefix information by means of a route advertisement message, and adds a field of the current address allocation mode to the route advertisement message.
  • the corresponding processing is performed, including: the mobile terminal device configures a site local address for the local area network port, and informs the access user terminal of the local area network terminal of the prefix information of the local address of the station;
  • the access user terminal device After obtaining the prefix information, the access user terminal device constructs an IPv6 site local address and performs IPv6 communication;
  • the mobile terminal device converts the site-local address into the global unicast address allocated by the GGSN by using the NAT66 and forwards the packet to the wireless wide area port to implement normal communication between the local message and the external network message.
  • the mobile terminal device notifies the access user terminal of the local area network port of the prefix information of the local address of the station in the manner of the route advertisement RA.
  • the method when determining that the current address allocation mode is a unique prefix, performing corresponding processing, includes: the mobile terminal device notifying the access user terminal of the IPv6 global unicast address obtained by the GGSN device to the access user terminal of the local area network port, and according to the prefix The division mode is to set the corresponding IPv6 unicast address for the LAN port and the wireless WAN port;
  • the access user terminal device After obtaining the prefix information, the access user terminal device constructs an IPv6 global unicast address and performs IPv6 communication;
  • the mobile terminal device forwards the IPv6 packet of the local area network to the wireless wide area port by means of route forwarding, and implements normal communication between the local message and the external network message.
  • the mobile terminal device notifies the access user terminal of the local area network port of the prefix information of the IPv6 global unicast address obtained by the GGSN device in the manner of the route advertisement RA.
  • the mobile terminal device of the present invention includes a route advertisement module and an address allocation mode detection module, wherein the route advertisement module is configured to: after the PDP activation is completed, send an RS route request message to the GGSN device, and obtain a prefix allocated by the GGSN device. And the address allocation mode detecting module is configured to: parse the current address allocation manner sent by the GGSN device, and determine whether the current address allocation mode is a unique identifier or a unique prefix, and notify the determined allocation mode Route advertisement module.
  • the mobile terminal device of the present invention further includes a packet forwarding processing module, configured to: the address allocation mode detecting module of the flow through server, further configured to: notify the packet forwarding processing module of the determined allocation mode.
  • the GGSN device of the present invention is configured to: notify the mobile terminal by adding an identifier of the currently used address allocation manner by configuration; and, when responding to the mobile terminal device with the assigned IPv6 address prefix information, routing the announcement message in the RA Add a field to the currently used address allocation method.
  • the system for automatically selecting an IPv6 address transmission mode of the present invention includes a gateway general packet radio service support node GGSN device and a mobile terminal device, wherein the GGSN device is configured to: increase the currently used address allocation manner by configuration The identifier is sent to the mobile terminal; and when the mobile terminal device responds to the allocated IPv6 address prefix information, the field of the current address allocation mode is added to the RA route advertisement message; the mobile terminal device is configured to: After the PDP context activation of the packet data protocol is completed, the IPv6 address identification information sent by the GGSN device is obtained, and the standard routing request RS message is sent to the GGSN device, and the current address allocation manner sent by the GGSN device is parsed, and the current address is determined.
  • the GGSN device is configured to: increase the currently used address allocation manner by configuration The identifier is sent to the mobile terminal; and when the mobile terminal device responds to the allocated IPv6 address prefix information, the field of the current address allocation mode is added to the RA route advertisement message
  • the mobile terminal device can automatically identify the IPv6 address allocation mode currently supported by the GGSN device, and simultaneously make the mobile terminal device
  • the method for constructing an IPv6 global unicast address by itself is automatically selected according to the information; the GGSN device can be implemented by using the embodiment of the present invention.
  • the mobile terminal device can automatically recognize the change and perform the IP address allocation mode switching, and achieve a smooth upgrade without changing the version.
  • the mobile device supporting multi-user access such as UFI, CPE, etc. can be uniquely assigned in the GGSN.
  • the IPv6 address identifier can also work normally.
  • FIG. 1 is a schematic diagram of a system for automatically selecting an IPv6 address transmission mode according to an embodiment of the present invention
  • FIG. 2 is a flow chart of a method for automatically selecting an IPv6 address transmission manner according to an embodiment of the present invention.
  • the method in the embodiment of the present invention is that in the second signaling phase of the IPv6 address acquisition in the dialing process, the mobile terminal device such as the mobile phone or the data card obtains the global IPv6 address from the GGSN by using the message of the route request RS and the route advertisement RA.
  • the mobile terminal device such as the mobile phone or the data card obtains the global IPv6 address from the GGSN by using the message of the route request RS and the route advertisement RA.
  • an extended attribute field is added to identify which address allocation mode is supported by the current GGSN device, so that the mobile terminal device receives the RA message. By reading this field, the address allocation method used by the current GGSN can be known.
  • the GGSN's address allocation mode is changed, only the configuration of the RA message sent by the GGSN device needs to be changed, and the mobile terminal device does not need to be distributed to the user for large-area version upgrade.
  • the change can be automatically identified and the manner in which the IPv6 address is constructed by itself is automatically selected.
  • the mobile terminal device may advertise the acquired 64-bit IPv6 address prefix information to the access user terminal by means of the stateless address configuration, according to the EUI- In the 64 way, an IPv6 unicast address is constructed for communication; when the mobile terminal device is a terminal device that supports multiple IPv6 users, such as UFI, PCE, etc., the prefix length division combined with the stateless address allocation may be used as the WAN port. , LAN port and access user The terminal constructs an IPv6 address, and forwards the packet between the LAN port and the WAN port by using the route forwarding mode to ensure that the access user terminal device can access the IPv6 network normally.
  • the GGSN device uses the method of assigning a unique identifier
  • the access user terminal acquires the end device to support multiple IPv6 users through AT or QMI.
  • the terminal device is added, the IPv6 address information of the access user cannot be changed in the route forwarding mode. Therefore, in order to enable the access user terminal to access normally in this mode, a certain address translation is required.
  • the present invention proposes a method of converting the IPv6 address of the access user terminal into the same IPv6 address as the GGSN using the stateful NAT66 (StateM NAT66) technique.
  • StateM NAT66 stateful NAT66
  • the mobile terminal device sets the IPv6 address of the LAN port to a fixed site-local IPv6 address according to the configuration information, and uses the stateless address configuration mode to notify the access of the site local address prefix information by means of route advertisement.
  • the user terminal constructs its own IPv6 site address in accordance with the EUI-64 method and uses the address for IPv6 communication.
  • the mobile terminal device dials the IPv6 unicast address successfully, the address of the WAN port is set to the address, and the stateful NAT66 function is enabled.
  • the NAT66 function can be used to convert the IPv6 site-local address of the access user terminal to the IPv6 global unicast address assigned by the GGSN.
  • the implementation of the NAT66 is basically the same as that of the IPv4 NAT.
  • the address and port pair use multiple IPv6 site addresses. Map to a unique external IPv6 global unicast address. Therefore, when the GGSN device uses the unique identification mode, the device such as the UFL CPE can access the IPv6 network normally.
  • Device embodiment
  • FIG. 1 is a schematic diagram of a system for automatically selecting an IPv6 address transmission mode according to an embodiment of the present invention.
  • the system includes an access user terminal device, a mobile terminal device, a GPRS service support node device (SGSN device), and a GPRS gateway. Support node device (GGSN device).
  • the access user terminal device 101 is a device connected to the mobile terminal device, and may be a personal computer (PC), a mobile phone, a tablet computer (PAD), or the like. Since the present invention relates to the content of IPv6 addresses, it is required that these connected devices must have already installed the IPv6 protocol stack, and since the system uses the stateless address configuration by default to configure the IPv6 address for the device, these devices are required.
  • a stateless address configuration related application is pre-installed in the standby.
  • the mobile terminal device 102 refers to a device such as a mobile phone or a data card that can be connected to the Internet by using a wireless protocol such as 2G/3G/4G. On the one hand, such devices can provide access to the Internet and can support access by one or more users.
  • the mobile terminal device 102 includes a route advertisement module, an address allocation mode detection module, and a message forwarding processing module.
  • the route advertisement module is configured to send an RS route request message to the GGSN device after the PDP activation is completed, obtain the prefix information and address configuration information allocated by the GGSN device, and allocate an IPv6 address prefix to the user accessing the mobile terminal. Information, by which the corresponding IPv6 address is constructed.
  • the address allocation mode detecting module is configured to detect and determine the address configuration mode obtained by the route advertisement module from the GGSN device, and notify the packet forwarding processing module and the route advertisement module to the determined allocation mode.
  • the packet forwarding processing module is configured to forward and process IPv6 packets flowing through the LAN port and the WAN port according to route forwarding or NAT66.
  • the SGSN device 103 is an important component of the WCDMA core network packet domain device, and mainly performs routing and forwarding of packet data packets, mobility management, and PDP session management.
  • the SGSN in the present invention can be implemented by using the prior art, and therefore, the present invention will not be described in detail.
  • the GGSN device 104 that is, the GPRS gateway support node, can be connected to a plurality of different data networks, mainly functions as a gateway, and can perform protocol conversion on GPRS packet data in GSM.
  • the stateless address configuration part of the GGSN device is modified to support the addition of the current address allocation mode of the GGSN device in the RA route advertisement message.
  • FIG. 2 is a flow chart of a method for automatically selecting an IPv6 address transmission method according to an embodiment of the present invention. As shown in Figure 2, the method includes the following steps:
  • Step 201 The GGSN device modifies the stateless address configuration part, and supports adding an extension field in the RA route advertisement message to identify the currently used address allocation mode, and notifying the mobile terminal of the information.
  • Step 202 The mobile terminal device performs dialing, interacts with the SGSN device, and completes the PDP. The related process is activated, and finally the IPv6 address identification information sent by the GGSN device is obtained.
  • Step 203 The route advertisement module of the mobile terminal device sends a standard RS request to the GGSN device, and the GGSN device responds the assigned IPv6 address prefix information in an RA manner, and adds a field of the currently used address allocation manner in the RA route advertisement message. .
  • Step 204 The address allocation mode detecting module of the mobile terminal device parses and determines the field of the current address allocation mode obtained from the RA route advertisement message. If the current address allocation mode is a unique identifier, step 205 is performed; When the allocation mode is a unique prefix, step 208 is performed;
  • Step 205 The route advertisement module in the mobile terminal device configures a site local address for the LAN port, and simultaneously informs the access user terminal of the LAN port that the prefix information of the site local address is advertised by the RA route.
  • Step 206 After obtaining the prefix information advertised by the RA, the access user terminal device constructs an IPv6 site local address according to the manner of EUI-64, and performs IPv6 communication.
  • Step 207 The packet forwarding processing module in the mobile terminal device converts the site local address into a global unicast address allocated by the GGSN by using the method of NAT66, and forwards the packet to the WAN port to implement the local 4 ⁇ text and the external network. The normal communication of the text.
  • Step 208 The route advertisement module in the mobile terminal device informs the access user terminal of the LAN port from the prefix information of the IPv6 global unicast address obtained by the GGSN device, and divides the prefix according to the prefix into a LAN. Set the corresponding IPv6 unicast address for the port and WAN port.
  • Step 209 After obtaining the prefix information advertised by the RA, the access user terminal device constructs an IPv6 global unicast address according to the manner of EUI-64, and performs IPv6 communication.
  • Step 210 The packet forwarding processing module in the mobile terminal device forwards the IPv6 packet route of the LAN port to the WAN port by means of route forwarding, so as to implement normal communication between the local packet and the external network packet.
  • the mobile terminal device can automatically identify the IPv6 address allocation mode currently supported by the GGSN device, and at the same time enable the mobile terminal device to automatically select itself according to the information.
  • a method for constructing an IPv6 global unicast address is allocated.
  • the present invention can be implemented when the GGSN device is upgraded and replaced with an IPv6 address allocation mode.
  • the mobile terminal device can automatically recognize the change and perform the IP address allocation mode switching, and achieve a smooth upgrade without changing the version.
  • the mobile device supporting multi-user access such as UFI, CPE, etc. can also be allocated when the GGSN is assigned a unique IPv6 address identifier. normal work.
  • the embodiments of the present invention provide a method, device, and system for automatically selecting an IPv6 address transmission method according to an embodiment of the present invention.
  • the mobile terminal device can automatically identify an IPv6 address allocation mode currently supported by the GGSN device, and simultaneously The mobile terminal device automatically selects a mode for constructing an IPv6 global unicast address according to the information.
  • the embodiment of the present invention can realize that when the GGSN device upgrades and replaces the IPv6 address allocation mode, the mobile terminal device can automatically recognize the change and perform the IP address allocation mode. Switching, smooth upgrade without changing the version; At the same time, UFI, CPE and other mobile devices supporting multi-user access can work normally even if the GGSN assigns a unique IPv6 address identifier.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

一种自动选择IPv6地址传输方式的方法、设备及系统,包括:网关通用分组无线服务技术GPRS支持节点GGSN设备通过配置增加当前所采用的地址分配方式的标识,并告知移动终端;移动终端设备在完成分组数据协议PDP上下文激活后,获得GGSN设备下发的IPv6地址标识信息;移动终端设备向GGSN设备发送标准路由请求RS消息,GGSN设备在向移动终端设备回应分配的IPv6地址前缀信息的同时,附上当前采用的地址分配方式;移动终端设备对GGSN设备发来的当前地址分配方式进行解析,并判断当前地址分配方式为唯一标识还是唯一前缀,然后执行相应处理。上述方案可以自动识别GGSN设备当前所支持的IPv6地址分配方式。

Description

一种自动选择 IPv6地址传输方式的方法、 设备和系统
技术领域
本发明涉及通信技术领域, 特别涉及一种自动选择 IPv6地址传输方式的 方法、 设备和系统。 背景技术
随着互联网络应用的蓬勃发展和信息技术的高速发展, 人们对互联网的 依赖越来越大, 同时伴随最近几年移动通信的快速崛起, 导致接入互联网的 计算机和设备数量迅速增加, 使目前互联网 ( Internet )上可用的互联网协议 ( Internet Protocol, IP ) 的第四版 IPv4地址面临严重短缺。 全球地址分配组 织 IANA于 2011年 2月宣布所有 IPv4地址已经全部下发至各大洲地址代理 机构,这意味着 IPv4地址已经耗尽再无可用地址分配。随着 IPv4地址的耗尽, IPv6正式走到舞台中央。
为了应对 IP地址耗尽问题,世界各国积极开展了向下一代互联网过渡的 工作, 美国、 欧洲、 亚太等各个国家纷纷部署了互联网协议第六版(Internet Protocol Version 6, IPv6 )业务发展战略, 并对 IPv6网络过渡提出了具体的 要求。 而第三代合作伙伴计划 ( 3rd Generation Partnership Project, 3GPP )和 第三代合作伙伴计划 2 ( 3rd Generation Partnership Project 2, 3GPP2 )相关协 议也很早就对移动通信过程中的 IPv6技术提出相关的要求和标准, 无论是 3GPP 的通用移动通信系统 ( Universal Mobile Telecommunications System, UMTS ) , 还是 3GPP2的 CDMA2000系统, 都早已确定了 IPv6是网络承载、 业务应用的发展方向。 特别是在 3G 的互联网协议(IP ) 多媒体系统 (IP Multimedia Subsystem, IMS ) 阶段, 网络系统将全面基于或兼容 IPv6。 IPv6 已成为互联网和移动通信网的共用基本协议, 移动 IPv6使互联网和移动通信 网融合, 可以提供无处不在和 "永远在线" 的连接。 手机、 数据卡等移动终 端设备如果需要通过 IPv6 的方式访问互联网, 首先需要通过进行拨号建立 UE与 GGSN之间基于 IPv6地址的分组数据协议上下文( PDP Context )承载, 只有在无线设备获得 IPv6地址和域名系统( Domain Name System, DNS )地 址之后才可访问互联网, 而 3GPP协议为终端拨号获取 IPv6地址的这一过程 制定了相关的标准和流程。
3GPP协议中指出 IPv6地址是由前缀和接口标识组成,其中高 64位为前 缀, 低 64位为接口标识。 IPv6地址分配过程与 IPv4稍有不同, 是釆用无状 态地址自动配置方式 ( Stateless Address Auto configuration )来进行完成的。 在 3GPP规范中, 接口标识和前缀都是由网络分两个阶段完成分配的, 第一 个阶段手机或数据卡从网关通用分组无线服务技术(General Packet Radio Service, GPRS )支持节点(GGSN )获得其接口标识, 这一阶段通过 PDP上 下文激活的过程来实现。 第二个信令阶段, 手机或数据卡等移动终端设备通 过使用路由请求(RS )和路由通告(RA ) 的消息来从 GGSN获取全球 IPv6 地址所需的地址前缀, 相关过程如图 1所示。
经过以上两个过程, 手机或数据卡等移动终端利用路由器通告消息携带 的前缀与先前收到的接口标识组成自己的全局 IPv6单播地址, 移动终端也可 以利用路由器通告消息携带的前缀与本地生成的接口标识构建自己的全局 IPv6单播地址。这样移动终端就可以使用全局 IPv6地址和外部数据网中的其 他主机进行通信了。
而对于可以支持多个用户接入的终端设备(例如中兴的 U I、 CPE )来说, 该类设备一般会存在一个无线广域口(WAN口)和一个局域网口(LAN口), 其中 WAN口通过 2G/3G等无线技术连接到互联网,而 LAN口则通过有线或 无线方式为终端设备的接入用户提供网络接入功能。 在 IPv4模式下, WAN 口的地址一般为 GGSN所分配的地址, 而 LAN口的地址一般为一局域网本 地地址(如 192.168.0.1 ) , 接入用户终端的 IP地址为与 LAN口属于同一网 段的某个地址,多个用户之间使用桥设备的方式互联。设备的 LAN口和 WAN 口之间由于 IP地址不在同一个网段, 故釆用网络地址转换( Network Address Translation, NAT ) 的方式, 将内网 IP转换为外网 IP, 从而保证接入用户的 终端设备可以正常地访问 IPv4网络。
而在 IPv6模式下, WAN口的地址仍为 GGSN所分配的地址, 出于 NAT 破坏了 IP端到端通信模型并容易产生单点故障等考虑, IPv6标准协议中默认 不建议使用 NAT,因此正常情况下 LAN口和 WAN口之间不再继续釆用 NAT 的方式, 而是优先选择使用路由转发的方式。 该方式需要对 WAN口和 LAN 口的地址进行特殊的处理, 具体实现可以参考 "一种基于单个 IPv6地址前缀 实现路由传输的方法和无线设备" (201110313190.9 )专利, 方法为从 GGSN 所分配 64位前缀长度的 IPv6地址中划分出一个 126位的 IPv6地址前缀, 然 后将该 126位前缀中的一个地址分配给 WAN口, 同时 WAN口地址前缀设 置为 126; 然后从剩余的 64位前缀长度的 IPv6地址中取一个与 WAN口不同 的地址分配给 LAN口,再通过无状态地址配置的方式,将 LAN口 64位的 IPv6 前缀以路由通告(RA ) 的方式告知所接入用户的终端, 由其根据 EUI-64的 方式构造完整的 IPv6全球单播地址, LAN口与 WAN口之间的 IPv6数据进 行路由转发, 这样便可保证接入用户的终端设备可以正常地访问 IPv6网络。
但是, 由于 IPv6相关协议本身存在一个逐步演进的过程, 因此导致不同 版本的 3GPP协议中对移动终端设备无状态 IPv6地址配置的过程的标准存在 一定的差异。 在 3GPP TS23.060 V5.0.0或较早版本中要求 GGSN设备为终端 设备分配唯一标识,同时终端设备在 IPv6地址配置过程中必须使用 GGSN所 下发的唯一标识, IP地址的前缀通过 RA方式获取; 而在 3GPP TS23.060 V5.1.0及以后版本中要求 GGSN设备为终端设备分配唯一前缀, 终端设备在 IP地址配置过程中必须使用 GGSN所下发的唯一前缀, IP地址的标识可以通 过 GGSN下发或终端设备自己按照 EUI-64的方式获得。 其中, EUI-64为 64 位的扩展唯一标识( 64-bit extended unique identifier ) , 该标识由 MAC地址 通过特定算法转换生成。
根据以上规范, 也即意味着当 GGSN设备釆用分配唯一前缀的方式时, 移动终端设备所发送的 IPv6报文的地址必须使用的 GGSN所分配的前缀信 息, 否则无法正常访问网络。 在该情况下移动终端设备仅需将 GGSN所分配 的 64位前缀信息釆用无状态地址配置技术以 RA方式通告给接入用户终端设 备即可, 同时由于 LAN口和 WAN口之间釆用路由转发的方式, 因此该情况 下接入用户终端设备可以正常访问 IPv6网络。但当 GGSN设备釆用分配唯一 标识的方式时,移动终端设备所发送的 IPv6 ^艮文的地址必须使用的 GGSN所 分配的标识信息, 否则无法正常访问。对于仅允许一个用户接入的移动设备, 如传统或免驱数据卡等, 可以釆用接入用户终端设备上安装特定客户端, 通 过数据终端设备 (DTE)和数据通信设备 (DCE)之间的接口命令 ( ATtention Command, AT )或高通平台与终端设备之间的消息接口( Qualcomm Messaging Interface, QMI )等方式获取 GGSN所分配的 IPv6地址, 然后将设备的 IP地 址设为相同的地址, 此时调制解调器 (MODEM )釆用数据桥接的方式, 对 接入用户发送的 IPv6数据进行透传,从而可以保证 IPv6网络的访问。但是对 于允许多个 IPv6用户接入的终端设备, 如便携式宽带无线接入设备(UFI或 MIFI即 mini wifi ) , 和家庭网关设备( Customer Premise Equipment, CPE ) 等,由于 LAN口和 WAN口之间釆用路由转发模式,接入用户终端设备的 IPv6 地址不管釆用静态还是动态获取的方式, 都无法保证移动终端设备发给 GGSN报文中的 IPv6地址标识与 GGSN所下发的一样,故该情况下 UFI、 CPE 等移动终端设备无法正常工作。
总之,在相关技术条件下为了支持 GGSN不同类型的 IPv6地址分配方式, 移动终端设备在开发和生产前需要先行确认运营商 IPV6地址分配的方式,针 对不同分配方式釆用不同的 IPv6地址传输方式; 当 GGSN设备的分配方式更 改后则需要对终端设备进行版本升级替换。 而对于 UFI、 CPE等可以支持多 个用户接入的终端设备来说, 在 GGSN分配唯一标识方式的情况下, 终端设 备无法支持多个用户同时接入并进行 IPv6网络访问。
发明内容
为了解决上述问题,本发明提供一种自动选择 IPv6地址传输方式的方法、 设备和系统, 能够自动识别 GGSN设备当前所支持的 IPv6地址分配方式。
本发明的自动选择 IPv6地址传输方式的方法, 包括:
网关通用分组无线服务技术 GPRS支持节点 GGSN设备通过配置增加当 前所釆用的地址分配方式的标识, 并告知移动终端; 移动终端设备在完成分组数据协议 PDP上下文激活后,获得 GGSN设备 下发的 IPv6地址标识信息;
移动终端设备向 GGSN设备发送标准路由请求 RS消息, GGSN设备在 向移动终端设备回应分配的 IPv6地址前缀信息的同时, 附上当前釆用的地址 分配方式;
移动终端设备对 GGSN设备发来的当前地址分配方式进行解析, 并判断 当前地址分配方式为唯一标识还是唯一前缀, 然后执行相应处理。
其中, 所述 GGSN设备在路由通告 RA消息中增加当前所釆用的地址分 配方式的标识。
其中, GGSN设备以路由通告消息方式回应分配的 IPv6地址前缀信息, 并在路由通告消息中增加当前釆用的地址分配方式的字段。
其中, 在判断当前地址分配方式为唯一标识时, 执行相应处理, 包括: 移动终端设备为局域网口配置一站点本地地址, 同时将该站点本地地址 的前缀信息告知局域网口的接入用户终端;
接入用户终端设备在获取到所述前缀信息后, 构造 IPv6站点本地地址, 并进行 IPv6通讯;
移动终端设备釆用 NAT66的方式将站点本地地址转换为 GGSN所分配 的全球单播地址并转发报文到无线广域口, 实现本地报文和外网报文的正常 通讯。
另外, 移动终端设备将该站点本地地址的前缀信息以路由通告 RA的方 式告知局域网口的接入用户终端。
另外, 在判断当前地址分配方式为唯一前缀时, 执行相应处理, 包括: 移动终端设备将从 GGSN设备所获取到的 IPv6全球单播地址的前缀信息 告知局域网口的接入用户终端, 同时按照前缀划分的方式为局域网口和无线 广域口设置相应的 IPv6单播地址;
接入用户终端设备在获取到所述前缀信息后, 构造 IPv6全球单播地址, 并进行 IPv6通讯;
移动终端设备釆用路由转发的方式将局域网口的 IPv6报文路由转发到无 线广域口, 实现本地报文和外网报文的正常通讯。 其中,移动终端设备将从 GGSN设备所获取到的 IPv6全球单播地址的前 缀信息以路由通告 RA的方式告知局域网口的接入用户终端。 本发明的移动终端设备, 包括路由通告模块和地址分配方式检测模块, 其中, 所述路由通告模块, 设置为: 在 PDP激活完成后向 GGSN设备发送 RS路由请求报文,获取 GGSN设备分配的前缀信息和地址配置信息; 所述地 址分配方式检测模块, 设置为: 对 GGSN设备发来的当前地址分配方式进行 解析, 并判断当前地址分配方式为唯一标识还是唯一前缀, 将判断后的分配 模式告知路由通告模块。
本发明的移动终端设备, 还包括报文转发处理模块, 设置为: 对流经局 所述地址分配方式检测模块, 还设置为: 将判断后的分配模式告知报文转发 处理模块。
本发明的 GGSN设备, 设置为: 通过配置增加当前所釆用的地址分配方 式的标识, 将该信息告知移动终端; 以及在向移动终端设备回应分配的 IPv6 地址前缀信息时, 在 RA路由通告消息中增加当前釆用的地址分配方式的字 段。
本发明的自动选择 IPv6地址传输方式的系统, 包括网关通用分组无线服 务技术支持节点 GGSN设备和移动终端设备, 其中, 所述 GGSN设备, 设置 为: 通过配置增加当前所釆用的地址分配方式的标识, 将该信息告知移动终 端; 以及在向移动终端设备回应分配的 IPv6地址前缀信息时, 在 RA路由通 告消息中增加当前釆用的地址分配方式的字段; 所述移动终端设备,设置为: 在完成分组数据协议 PDP上下文激活后, 获得 GGSN设备下发的 IPv6地址 标识信息, 以及向 GGSN设备发送标准路由请求 RS消息, 并对 GGSN设备 发来的当前地址分配方式进行解析, 并判断当前地址分配方式为唯一标识还 是唯一前缀, 然后执行相应处理。 本发明实施例的有益效果是: 依照本发明实施例的自动选择 IPv6地址传 输方式的方法、 设备和系统, 移动终端设备可以自动识别 GGSN设备当前所 支持的 IPv6地址分配方式, 同时使移动终端设备根据该信息自动选择自身分 配构造 IPv6全球单播地址的方式;借助本发明实施例可以实现当 GGSN设备 升级更换 IPv6地址分配方式时, 移动终端设备可以自动识别变化并进行 IP 地址分配模式切换, 无需更换版本而实现平稳升级; 同时使 UFI、 CPE等支 持多用户接入的移动设备可以在 GGSN分配唯一 IPv6地址标识的情况下也可 正常工作。
附图概述
图 1为本发明实施例的自动选择 IPv6地址传输方式的系统的示意图; 图 2为本发明实施例涉及到的自动选择 IPv6地址传输方式的方法流程 图。
本发明的较佳实施方式
以下, 参考附图 1~2详细描述本发明的自动选择 IPv6地址传输方式的方 法、 设备和系统。
本发明实施例的方法为拨号过程中在 IPv6 地址获取的第二个信令阶段 中, 手机或数据卡等移动终端设备通过使用路由请求 RS和路由通告 RA的 消息来从 GGSN获取全球 IPv6地址所需的地址前缀的过程中, 在 GGSN设 备回应给移动终端的 RA路由通告消息中, 增加一扩展属性字段, 标识当前 GGSN设备所支持哪种地址分配方式, 这样移动终端设备在收到 RA消息之 后通过读取该字段即可获知当前 GGSN所釆用的地址分配方式。 当 GGSN的 地址分配方式进行变化时, 仅需更改 GGSN设备中下发 RA消息的相关配置 即可, 而无需分发到用户的移动终端设备进行大面积版本升级。
进一步地, 当移动终端设备获取到 GGSN设备的地址分配方式之后, 便 可以据此自动识别变化并自动选择本身分配构造 IPv6地址的方式。
当 GGSN设备釆用分配唯一前缀的方式时, 移动终端设备可以釆用无状 态地址配置的方法将所获取的 64位 IPv6地址前缀信息以 RA的方式通告给接 入用户终端, 由其按照 EUI-64的方式构造 IPv6单播地址进行通讯; 当移动 终端设备为支持多个 IPv6用户接入的终端设备时, 如 UFI、 PCE等, 可以釆 用前缀长度划分结合无状态地址分配的方式为 WAN口、 LAN口和接入用户 终端构造 IPv6地址, 并釆用路由转发方式在 LAN口和 WAN口之间进行报 文转发, 保证接入用户终端设备可正常访问 IPv6网络。
当 GGSN设备釆用分配唯一标识的方式时, 移动终端设备为仅支持一个 IPv6用户接入的终端设备时, 釆用接入用户终端通过 AT或 QMI等方式获取 端设备为支持多个 IPv6用户接入的终端设备时, 由于路由转发模式下无法更 改接入用户的 IPv6地址信息, 因此为使接入用户终端在该方式下也可以正常 访问, 需要进行一定的地址转换。为此本发明提出使用有状态 NAT66(StateM NAT66)的技术对接入用户终端的 IPv6 地址进行转换成与 GGSN所分相同 IPv6地址的方法。
另外, 移动终端设备根据配置信息将 LAN口的 IPv6地址设置为一固定 的站点本地 IPv6地址, 同时釆用无状态地址配置的方式, 将该站点本地地址 的前缀信息以路由通告的方式告知接入用户终端,由其按照 EUI-64方式构造 其自身的 IPv6站点地址,并使用该地址进行 IPv6通讯。 当移动终端设备拨号 成功获取 IPv6单播地址后, 将 WAN口的地址设置为该地址, 同时开启有状 态 NAT66功能。通过 NAT66功能可以将接入用户终端的 IPv6站点本地地址 转换为 GGSN所分配的 IPv6全球单播地址, NAT66的实现思路与 IPv4 NAT 的实现思路基本一样, 使用地址、 端口对将多个 IPv6站点地址映射到唯一的 外网 IPv6全球单播地址。 从而实现当 GGSN设备釆用分配唯一标识方式时, UFL CPE等设备可以正常访问 IPv6网络的目的。 装置实施例
图 1为本发明实施例的自动选择 IPv6地址传输方式的系统的示意图, 如 图 1 所示, 该系统包括接入用户终端设备、 移动终端设备、 GPRS服务支持 节点设备 ( SGSN设备 )和 GPRS网关支持节点设备 ( GGSN设备) 。 其中, 接入用户终端设备 101 为连接到移动终端设备的设备, 可以为个人计算机 ( ersonal computer, PC )、手机、平板电脑( PAD )等。 由于本发明涉及 IPv6 地址的相关内容, 因此要求这些连接设备必须已经安装 IPv6协议栈, 同时由 于系统中默认釆用无状态地址配置来为设备配置 IPv6地址, 因此要求这些设 备中已预装无状态地址配置相关应用。
移动终端设备 102, 指手机、数据卡等可移动并釆用 2G/3G/4G等无线协 议接入到互联网的设备。 这类设备一方面可以提供互联网的接入功能, 同时 可以支持一个或多个用户接入访问。 在本发明中, 移动终端设备 102, 包括 路由通告模块、 地址分配方式检测模块和报文转发处理模块。
其中, 路由通告模块, 用于在 PDP激活完成后向 GGSN设备发送 RS路 由请求报文, 获取 GGSN设备所分配的前缀信息和地址配置信息; 以及用于 为接入移动终端的用户分配 IPv6地址前缀信息, 由其根据构造相应的 IPv6 地址。
地址分配方式检测模块, 用于对路由通告模块从 GGSN设备获取到的地 址配置方式进行检测判断, 并将判断后的分配模式告知报文转发处理模块和 路由通告模块。
报文转发处理模块, 用于对流经 LAN口和 WAN口的 IPv6报文按照路 由转发或 NAT66等方式进行转发处理。
SGSN设备 103 , 为 WCDMA核心网分组域设备重要组成部分, 主要完 成分组数据包的路由转发、移动性管理、 PDP会话管理等。本发明中的 SGSN 可以釆用现有技术来实现, 因此, 本发明不再进行详细描述。
GGSN设备 104, 即 GPRS网关支持节点, 可以和多种不同的数据网络 连接, 主要起网关作用, 可以把 GSM中的 GPRS分组数据进行协议转换。 本 发明中需要 GGSN设备中的无状态地址配置部分进行修改, 让其支持将 GGSN设备当前的地址分配方式在 RA路由通告报文中添加。 方法实施例:
图 2为本发明实施例涉及到的自动选择 IPv6地址传输方式的方法流程 图。 如图 2所示, 该方法包括下列步骤:
步骤 201 : GGSN设备对无状态地址配置部分进行修改, 支持可通过配 置在 RA路由通告消息中增加一扩展字段, 标识当前所釆用的地址分配方式, 将该信息告知移动终端。
步骤 202: 移动终端设备进行拨号, 与 SGSN设备进行交互, 完成 PDP 激活相关过程, 并最终获得 GGSN设备所下发的 IPv6地址标识信息。
步骤 203:移动终端设备的路由通告模块向 GGSN设备发送标准 RS请求, GGSN设备将分配的 IPv6地址前缀信息以 RA方式给予回应, 并在 RA路由 通告消息中增加当前釆用的地址分配方式的字段。
步骤 204:移动终端设备的地址分配方式检测模块对从 RA路由通告消息 中获得的当前地址分配方式的字段进行解析、 判断, 如果当前地址分配方式 为唯一标识时, 则执行步骤 205; 如果当前地址分配方式为唯一前缀时, 则 执行步骤 208;
步骤 205: 移动终端设备中的路由通告模块为 LAN口配置一站点本地地 址, 同时将该站点本地地址的前缀信息以 RA路由通告的方式告知 LAN口的 接入用户终端。
步骤 206: 接入用户终端设备在获取到 RA通告的前缀信息后, 按照 EUI-64的方式构造 IPv6站点本地地址, 并进行 IPv6通讯。
步骤 207: 移动终端设备中的报文转发处理模块釆用 NAT66的方式将站 点本地地址转换为 GGSN所分配的全球单播地址并转发报文到 WAN口, 实 现本地 4艮文和外网 4艮文的正常通讯。
步骤 208: 移动终端设备中的路由通告模块将从 GGSN设备所获取到的 IPv6全球单播地址的前缀信息以 RA路由通告的方式告知 LAN口的接入用户 终端, 同时按照前缀划分的方式为 LAN口和 WAN口设置相应的 IPv6单播 地址。
步骤 209: 接入用户终端设备在获取到 RA通告的前缀信息后, 按照 EUI-64的方式构造 IPv6全球单播地址 , 并进行 IPv6通讯。
步骤 210: 移动终端设备中的报文转发处理模块釆用路由转发的方式将 LAN口的 IPv6报文路由转发到 WAN口, 实现本地报文和外网报文的正常通 讯。
综上所述, 依照本发明的自动选择 IPv6地址传输方式的方法、 设备和系 统,移动终端设备可以自动识别 GGSN设备当前所支持的 IPv6地址分配方式, 同时使移动终端设备根据该信息自动选择自身分配构造 IPv6全球单播地址的 方式; 借助本发明可以实现当 GGSN设备升级更换 IPv6地址分配方式时, 移 动终端设备可以自动识别变化并进行 IP地址分配模式切换, 无需更换版本而 实现平稳升级; 同时使 UFI、 CPE等支持多用户接入的移动设备可以在 GGSN 分配唯一 IPv6地址标识的情况下也可正常工作。
以上是为了使本领域普通技术人员理解本发明, 而对本发明所进行的详 细描述, 但可以想到, 在不脱离本发明的权利要求所涵盖的范围内还可以做 出其它的变化和修改, 这些变化和修改均在本发明的保护范围内。
工业实用性 本发明实施例的有益效果是: 依照本发明实施例的自动选择 IPv6地址传 输方式的方法、 设备和系统, 移动终端设备可以自动识别 GGSN设备当前所 支持的 IPv6地址分配方式, 同时使移动终端设备根据该信息自动选择自身分 配构造 IPv6全球单播地址的方式;借助本发明实施例可以实现当 GGSN设备 升级更换 IPv6地址分配方式时, 移动终端设备可以自动识别变化并进行 IP 地址分配模式切换, 无需更换版本而实现平稳升级; 同时使 UFI、 CPE等支 持多用户接入的移动设备可以在 GGSN分配唯一 IPv6地址标识的情况下也可 正常工作。

Claims

权 利 要 求 书
1. 一种自动选择互联网协议第 6版 IPv6地址传输方式的方法, 包括: 网关通用分组无线服务技术 GPRS支持节点 GGSN设备通过配置增加当 前所釆用的地址分配方式, 并将该分配方式告知移动终端;
移动终端设备在完成分组数据协议 PDP上下文激活后,获得 GGSN设备 下发的 IPv6地址标识信息;
移动终端设备向 GGSN设备发送标准路由请求 RS消息, GGSN设备在 向移动终端设备回应分配的 IPv6地址前缀信息的同时, 附上当前釆用的地址 分配方式;
移动终端设备对 GGSN设备发来的当前地址分配方式进行解析, 并判断 当前地址分配方式为唯一标识还是唯一前缀, 然后执行相应处理。
2. 如权利要求 1所述的方法, 其中, 所述 GGSN设备在路由通告 RA消 息中增加当前所釆用的地址分配方式的标识。
3. 如权利要求 1 所述的方法, 其中, GGSN设备以路由通告消息方式 回应分配的 IPv6地址前缀信息, 并在路由通告消息中增加当前釆用的地址分 配方式的字段。
4. 如权利要求 1至 3中任一项所述的方法, 其中, 在判断当前地址分配 方式为唯一标识时, 执行相应处理, 包括:
移动终端设备为局 i或网口配置一站点本地地址, 同时将该站点本地地址 的前缀信息告知局域网口的接入用户终端;
接入用户终端设备在获取到所述前缀信息后, 构造 IPv6站点本地地址, 并进行 IPv6通讯;
移动终端设备釆用 NAT66的方式将站点本地地址转换为 GGSN所分配 的全球单播地址并转发 4艮文到无线广域口, 实现本地 ^艮文和外网 ^艮文的正常 通讯。
5. 如权利要求 4中所述的方法, 其中, 移动终端设备将该站点本地地址 的前缀信息以路由通告 RA的方式告知局域网口的接入用户终端。
6. 如权利要求 1至 3中任一项所述的方法, 其中, 在判断当前地址分配 方式为唯一前缀时, 执行相应处理, 包括:
移动终端设备将从 GGSN设备所获取到的 IPv6全球单播地址的前缀信息 告知局域网口的接入用户终端, 同时按照前缀划分的方式为局域网口和无线 广域口设置相应的 IPv6单播地址;
接入用户终端设备在获取到所述前缀信息后, 构造 IPv6全球单播地址, 并进行 IPv6通讯;
移动终端设备釆用路由转发的方式将局域网口的 IPv6报文路由转发到无 线广域口, 实现本地报文和外网报文的正常通讯。
7. 如权利要求 6所述的方法, 其中, 移动终端设备将从 GGSN设备所获 取到的 IPv6全球单播地址的前缀信息以路由通告 RA的方式告知局域网口的 接入用户终端。
8. 一种移动终端设备, 包括路由通告模块和地址分配方式检测模块, 其 中,
所述路由通告模块, 设置为: 在 PDP激活完成后向 GGSN设备发送 RS 路由请求报文, 获取 GGSN设备分配的前缀信息和地址配置信息;
所述地址分配方式检测模块, 设置为: 对 GGSN设备发来的当前地址分 配方式进行解析, 并判断当前地址分配方式为唯一标识还是唯一前缀, 将判 断后的分配模式告知路由通告模块。
9. 如权利要求 8所述的移动终端设备,其中,还包括报文转发处理模块, 设置为: 对流经局域网口和无线广域口的 IPv6报文按照路由转发或 NAT66 方式进行转发处理; 所述地址分配方式检测模块, 还设置为: 将判断后的分 配模式告知报文转发处理模块。
10. 一种网关通用分组无线服务技术 GPRS支持节点 GGSN设备, 所述 GGSN设备, 设置为: 通过配置增加当前所釆用的地址分配方式, 将该分配 方式告知移动终端;以及在向移动终端设备回应分配的 IPv6地址前缀信息时, 在 RA路由通告消息中增加当前釆用的地址分配方式的字段。
11. 一种自动选择互联网协议第 6版 IPv6地址传输方式的系统, 包括网 关通用分组无线服务技术支持节点 GGSN设备和移动终端设备, 其中,
所述 GGSN设备, 设置为: 通过配置增加当前所釆用的地址分配方式, 将该分配方式告知移动终端; 以及在向移动终端设备回应分配的 IPv6地址前 缀信息时, 在 RA路由通告消息中增加当前釆用的地址分配方式的字段; 所述移动终端设备, 设置为: 在完成分组数据协议 PDP上下文激活后, 获得 GGSN设备下发的 IPv6地址标识信息, 以及向 GGSN设备发送标准路 由请求 RS消息, 并对 GGSN设备发来的当前地址分配方式进行解析, 并判 断当前地址分配方式为唯一标识还是唯一前缀, 然后执行相应处理。
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