WO2009065335A1 - Procédé et système de sélection de passerelle d'accès et nœud mettant en œuvre la sélection de passerelle de domaine de groupe mobile - Google Patents

Procédé et système de sélection de passerelle d'accès et nœud mettant en œuvre la sélection de passerelle de domaine de groupe mobile Download PDF

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Publication number
WO2009065335A1
WO2009065335A1 PCT/CN2008/072753 CN2008072753W WO2009065335A1 WO 2009065335 A1 WO2009065335 A1 WO 2009065335A1 CN 2008072753 W CN2008072753 W CN 2008072753W WO 2009065335 A1 WO2009065335 A1 WO 2009065335A1
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WIPO (PCT)
Prior art keywords
gateway
domain name
operator
dns
execution node
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PCT/CN2008/072753
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English (en)
French (fr)
Inventor
Hong Liu
Original Assignee
China Mobile Communications Corporation
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.)
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40631289&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009065335(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by China Mobile Communications Corporation filed Critical China Mobile Communications Corporation
Priority to US12/681,321 priority Critical patent/US8995334B2/en
Priority to EP08851242.1A priority patent/EP2205040B1/en
Priority to KR1020107008484A priority patent/KR101111153B1/ko
Priority to BRPI0819467 priority patent/BRPI0819467A2/pt
Priority to JP2010528266A priority patent/JP5068855B2/ja
Publication of WO2009065335A1 publication Critical patent/WO2009065335A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/17Selecting a data network PoA [Point of Attachment]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/45Network directories; Name-to-address mapping
    • H04L61/4505Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
    • H04L61/4511Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/45Network directories; Name-to-address mapping
    • H04L61/4588Network directories; Name-to-address mapping containing mobile subscriber information, e.g. home subscriber server [HSS]

Definitions

  • the present invention relates to a method, system and gateway selection node for selecting an access gateway, and more particularly to a method, system and gateway selection node for selecting an access gateway in a mobile packet domain.
  • the structure of the mobile packet domain network is as shown in Figure 1.
  • the GGSN (Gateway GPRS Supporting Node) is the gateway of the mobile communication network and the IP network. It is responsible for assigning IP addresses to the User Equipment (User Equipment). The UE can access the IP network.
  • the SGSN is responsible for resource management and control, and selects a suitable GGSN for the user to provide a channel for communication between the UE and the GGSN; HLR/HSS (Home Location Register, Home Location Storage, High Speed Switch) is responsible for user subscription data. storage.
  • 3GPP R7 allows user plane data to be transmitted directly between the wireless network and the GGSN, while the signaling plane is still connected to the wireless network through the SGSN (GPRS Service Support Node), which is called the One Tunnel architecture.
  • SGSN GPRS Service Support Node
  • FIG. 3GPP is working to simplify the standardization of mobile packet domain network structure.
  • Figure 3 and Figure 4 are two possible future mobile packet domain network structures, among which PDN GW (Message Data Network Gateway) and Serving GW (Serving Gateway) It is evolved from the GGSN.
  • PDN GW Message Data Network Gateway
  • Serving GW Serving Gateway
  • the P ⁇ GW is responsible for allocating IP addresses to the UE, and the presence of the Serving GW is beneficial to the user to perform large-scale mobility while maintaining the PDN GW unchanged.
  • Solid E Mobility Management Entity evolved from the SGSN and is responsible for resource management and control, selecting the appropriate P ⁇ GW for the user.
  • a gateway node As can be seen from the above description, whether it is the current mobile packet domain network architecture, the mobile packet domain network architecture defined by 3GPP R7, or the possible mobile packet domain network architecture in the future, there are three logical nodes: a gateway node, a gateway selection execution node, The user subscribes to the data storage node, and the relationship is also shown in FIG. 5.
  • the subscriber's subscription data will be delivered to the gateway through the user subscription data storage node when the user attaches to the network. If the user is selected, the subscription data of the gateway selection node user will be sent to the new gateway selection execution node through the user subscription data storage node. When the user subscription data changes, the new user subscription data will also pass the user. The contracted data storage node is delivered to the new gateway to select the execution node. The process that is issued is shown in Figure 6.
  • the selection of the packet domain gateway is completed by the gateway selecting the execution node, and the process is as shown in FIG. , mainly includes the following steps:
  • Step 1 The user equipment selects an execution node to send a bearer setup request to the gateway.
  • Step 2 The gateway selects an execution node configuration ⁇ S (Doma in Name Server, DNS server) request message;
  • Step 3 The gateway selects an execution node to send a DNS resolution request to the DNS server.
  • Step 4 After the DNS server parses, return the DNS resolution result to the gateway execution node.
  • Step 5 The gateway selects the execution node to select a gateway node from the DNS resolution result as the access gateway that establishes the request.
  • the gateway selection execution node generally attaches the user's country number and network number contained in the IMS I field in the user subscription data to the APN ((Acces s Po int Name) name indicated by the user.
  • the APN is used to determine the DNS resolution. Therefore, even if the roaming user is the same as the APN used by the local user, the roaming user can locate the appropriate gateway node according to the country number and the network number (the operator generally wants to roam to other carriers' own own). User traffic can be returned to its own gateway node for processing).
  • an operator's DNS server needs to configure all the combinations of the APN that another operator needs to roam and the country number and network number owned by that carrier to support roaming users from that carrier.
  • step 1 if the user terminal does not explicitly give the APN indicated by the user in the bearer setup request message, it actually indicates that the user wishes to use the default APN, so in step 2 the gateway selects the execution node to be configured for The APSN parsed by APS will use the default APN configured in the user subscription data as the APN indicated by the user.
  • the gateway selection execution node may select the gateway node according to the field included in some user subscription data and the field included in the bearer setup request message sent by the user. In this case, steps 2 and 3 may not be performed. 4, 5. For example, if the bearer setup request message sent by the user includes the IP address of the gateway node that the user wants to use and the user subscription data also allows the user to use the gateway node, the gateway selection execution node can use the gateway node to provide services for the user.
  • the gateway selection execution node may attach other information when constructing the APM for DNS resolution according to the operator's configuration, for example, the IMS I (International User Identification Number) except the country number. And some content other than the network number and so on.
  • IMS I International User Identification Number
  • the gateway Selecting the execution node may reject the user's bearer setup request, or select a gateway node (such as the default gateway node) according to the operator's configuration, or select a gateway node according to the information in the user subscription data (such as the default configured in the user subscription information). Gateway node), or reconfigure APNX for DNS resolution Repeat steps 3, 4, 5 to resolve the address of the gateway node.
  • the DNS server of the roaming operator needs to configure the APN of the home operator (Aces s Po int Name, the name of the access point) The name and the country number, the network number, and the corresponding gateway address, so that in the process of DNS resolution, the gateway of the roaming operator selects the execution node to obtain the address of the gateway node of the home operator, if the operation of the roaming place.
  • the address information of the access gateway node of the home operator is not configured in the ⁇ S server of the MME, or the same APN (Aces s Po int Name) of the home access gateway exists in the ⁇ S server of the roaming place.
  • the name of the name, but the country number and network number of the home operator are not stored. In this case, the gateway of the home operator cannot be selected for the user terminal.
  • the gateway selection scheme of the prior art requires more configuration of the DNS server of each operator.
  • the APN and the country number, the network number, and the corresponding gateway address corresponding to one operator need to be configured in multiple carriers.
  • the DNS server of other operators needs to be modified, and the data update is extremely inconvenient.
  • a carrier's DNS server For a carrier's DNS server, you need to store at least the APN and country number, network number, and corresponding gateway address corresponding to the carrier. Since the country number and network number do not uniquely correspond to one carrier, one carrier. There may be multiple network numbers, so that the operator's DNS server needs to be stored separately according to the country number and network number, which greatly wastes the storage cost of the operator's DNS server.
  • An object of the present invention is to provide a gateway selection method and system for a mobile packet domain, and a gateway selection execution node, which reduces the limitation of gateway selection by the roaming DNS resolution server and according to the country number and network when performing the gateway selection operation in a roaming manner. No. The limitation imposed by gateway address resolution.
  • the present invention provides a method for selecting an access gateway of a mobile packet domain, including:
  • the gateway selection execution node After the gateway selection execution node receives the bearer setup request sent by the user terminal, the gateway selects the execution node to encapsulate the carrier domain name corresponding to the bearer setup request into the DNS resolution request, and sends the request to the DNS server. ;
  • ⁇ S server performs address resolution of the access gateway
  • the S server selects an execution node to return a DNS resolution result to the gateway, and the DNS resolution result includes address information of the access gateway corresponding to the carrier domain name;
  • the gateway selection execution node selects, according to the address information, an access gateway corresponding to the operator domain name as an access gateway corresponding to the bearer setup request.
  • the present invention also provides a selection system for an access gateway of a mobile packet domain, including a gateway selection execution node and a first UI server for parsing a resolution request sent by the gateway selection execution node, the gateway selecting an execution node
  • a first module is further configured to encapsulate the carrier domain name corresponding to the bearer setup request into the DNS resolution request when constructing the ⁇ S parsing request.
  • the present invention further provides a gateway selection execution node, which is provided with a first module, configured to encapsulate the carrier domain name corresponding to the bearer setup request into a DNS resolution request when constructing a DNS resolution request.
  • the present invention introduces the operator domain name resolution mechanism when selecting the corresponding operator's access gateway for the user terminal, and has the following beneficial effects:
  • FIG. 1 is a schematic structural diagram of a mobile packet domain network used in the prior art
  • 2 is a schematic diagram of a mobile packet domain network structure defined by 3GPP R7 in the prior art
  • FIG. 3 is a schematic diagram of a possible future mobile packet domain network structure described in the prior art
  • FIG. 4 is a possible future recorded in the prior art.
  • FIG. 5 is a schematic diagram of the relationship between the abstracted mobile packet domain network element nodes in the prior art
  • FIG. 6 is a flow chart of the user subscription data transmission in the prior art;
  • FIG. 7 is a flow chart of selecting an access gateway node in a mobile packet domain
  • FIG. 8 is a flowchart of Embodiment 1 of a gateway selection method for a mobile packet domain according to the present invention
  • FIG. 9 is a flowchart of Embodiment 2 of a gateway selection method for a mobile packet domain according to the present invention
  • FIG. 10 is a mobile packet domain of the present invention
  • FIG. 1 is a schematic structural diagram 1 of a first embodiment of a gateway selection system for a mobile packet domain according to the present invention
  • FIG. 12 is a schematic structural diagram 2 of a gateway selection system for a mobile packet domain according to the present invention
  • FIG. 8 is a flowchart of Embodiment 1 of a method for selecting a gateway of a mobile packet domain according to the present invention
  • the present invention introduces a domain name resolution mechanism for an operator when selecting an access gateway of a corresponding operator for a user terminal.
  • the specific process is as follows:
  • Step 1 01 The user terminal selects an execution node to send a bearer setup request to the gateway.
  • Step 1 02 When constructing the DNS resolution request, the gateway selection execution node encapsulates the operator domain name corresponding to the user terminal into the ⁇ S resolution request; the step may be specifically as follows: the gateway selects the execution node to use the attribution carrier domain name feature. And the access point name constructs a carrier domain name corresponding to the bearer establishment request; the gateway selection execution node adds a field to the user data stored by the user subscription data storage node to store the operation corresponding to the user terminal before performing the APN resolution by using the ⁇ S server A domain name is used as an APN to be added to the APN. The specific suffix is attached to the APN carried in the bearer request sent by the user terminal to form an APN for DNS resolution.
  • Step 103 The gateway selects the execution node. Send a DNS resolution request containing the carrier domain name to the DNS server;
  • Step 1 04 The DNS server performs address resolution of the access gateway.
  • Step 1 05 The DNS server selects an execution node to return a parsing result to the gateway, where the parsing result includes address information of the access gateway corresponding to the operator domain name;
  • Step 1 06 The gateway selects an execution node to select an access corresponding to the carrier domain name according to the address information.
  • the gateway acts as an access gateway corresponding to the bearer setup request.
  • the gateway selection execution node may acquire the carrier domain name corresponding to the user terminal from the user subscription data storage node.
  • the subscriber subscription data storage node stores the user subscription data corresponding to the domain name of the operator of the user, and sends the home operator domain name feature to the gateway selection execution node by selecting the execution node to send the user subscription data to the gateway.
  • a field may be added to the user data stored by the user subscription data storage node to store the operator domain name corresponding to the user terminal, which is an operator-specific suffix that needs to be added as an APN resolution, and the specific suffix is utilized by the gateway selection node.
  • the ⁇ S server needs to be attached before performing APN resolution.
  • the specific suffix can be a variable-length string (the maximum length of the string may be specified in normalization to avoid loss of control over the size of the message). Operators can use similar
  • the string "chinamobi le. com" (the domain name owned by the operator) is used as the value of this field.
  • the DNS resolution request can be forwarded to the operator's own DNS server, so that the terminal can be finally operated.
  • the address of the provider's access gateway node For operators, there are also a wider range of extended applications.
  • multiple carrier domain names can be configured. Each domain name corresponds to its own access gateway. For example, it can be configured as "chinamobi lel. com " ,
  • the gateway selection execution node determines whether the bearer setup request includes the access point name indicated by the user terminal, and if the bearer setup request sent by the user terminal includes the access indicated by the user terminal. The point name, the gateway selects the execution node to use the access point name as the access point name to construct the operator domain name; if the bearer setup request sent by the user terminal does not include the access point name indicated by the user terminal, the gateway selects the execution node to use the user subscription data.
  • the default access point name configured in the port is used as the access point name to construct the carrier domain name.
  • the information used to construct the carrier domain name corresponding to the bearer setup request may further include: a country number and/or a network number in the international mobile subscriber identity code, Or the information other than the country number and the network number constructs the carrier domain name corresponding to the bearer establishment request.
  • the gateway selection execution node selects an execution node for the roaming or home gateway of the user terminal
  • the DNS server is a roaming or home carrier's DNS server, roaming or
  • the operator's DNS server of the home location stores the carrier domain name corresponding to the user terminal (ie, the domain name of the home operator) and the address of the access gateway corresponding to the carrier domain name.
  • the process of this embodiment is as shown in FIG. , including:
  • Step 201 The user terminal selects an execution node to send a bearer setup request to the gateway.
  • Step 202 When constructing a DNS resolution request, the gateway selects an execution node to encapsulate the domain name of the home operator corresponding to the user terminal into the ⁇ S resolution request;
  • Step 203 The gateway selection execution node sends a DNS resolution request including the operator domain name to the DNS server of the roaming operator.
  • Step 204 Query a DNS server of the roaming place or the home operator, and the DNS server searches according to the domain name of the operator, and obtains an address of the access gateway corresponding thereto.
  • Step 205 The DNS server of the roaming or the home operator selects the execution node to return the parsing result to the gateway, where the parsing result includes the address information of the access gateway corresponding to the domain name of the home operator;
  • Step 206 The gateway selection execution node selects an access gateway corresponding to the operator domain name as the access gateway corresponding to the bearer setup request according to the address information.
  • the gateway selects the execution node as the gateway of the roaming place of the user terminal, and the DNS server is the DNS server of the roaming operator, and the DNS service of the roaming operator does not exist.
  • the process of storing the domain name of the home operator and the address of the access gateway corresponding to the carrier domain name is as shown in FIG. 10, and includes:
  • Step 301 The user terminal selects an execution node to send a bearer setup request to the gateway.
  • Step 302 When constructing a DNS resolution request, the gateway selects an execution node to encapsulate the domain name of the home operator corresponding to the user terminal into the ⁇ S resolution request.
  • Step 303 The gateway selection execution node sends a DNS resolution message request including the carrier domain name to the DNS server of the roaming operator.
  • Step 304 Query the DNS server of the roaming operator, and obtain the address information of the access gateway corresponding to the domain name of the home operator (that is, the DNS entry corresponding to the APN name indicated by the user terminal in the bearer request) (DNS Ent ry) );
  • Step 305 The DNS server of the roaming operator forwards the parsing request to the DNS server of the first level, performs DNS recursive parsing according to the standard ⁇ S recursive query method, and obtains the access gateway corresponding to the domain name of the home operator. Up to the address information;
  • the parsing request can be finally forwarded to the ⁇ S server of the home operator, and the access gateway is obtained. Address), and the operator's domain name is unique in the world.
  • the operator can configure multiple domain names, and each domain name corresponds to a different access gateway, which avoids determining the access gateway node by country number and network number. defect.
  • the DNS recursion will be performed according to the standard DNS recursive query method. As a result, as long as there is a corresponding DNS Ent ry in the DNS server of the operator to which the user belongs, the correct parsing result will be sent to the gateway selection execution node, so that the gateway selection execution node can obtain the IP address of the access gateway.
  • Step 306 The DNS server of the upper level of the roaming operator's DNS server returns a DNS analysis result.
  • Step 307 After receiving the DNS resolution result returned by the upper-level DNS server, the DNS server of the roaming operator returns the analysis result to the gateway selection execution node, where the analysis result includes the domain name corresponding to the operator domain of the user terminal. Address information of the access gateway;
  • Step 308 The gateway selection execution node selects an access gateway corresponding to the operator domain name as the access gateway corresponding to the bearer setup request according to the address information.
  • the gateway selection execution node will use the default APN configured in the user subscription data as the APN indicated by the user.
  • the gateway selection execution node may still select the access gateway according to the field included in some user subscription data and the field included in the bearer setup request message sent by the user. In this case, the subsequent steps of inserting the operator domain name may not be needed. Subsequent parsing processes can be performed in full accordance with the existing gateway selection process. For example, if the bearer setup request message sent by the user terminal includes the IP address of the access gateway that the user wants to use, and the user subscription data also allows the user to use the access gateway, the gateway selection execution node may select to use the access gateway as the user. Provide services.
  • the gateway selection execution node may attach other information when constructing the APN for ⁇ S resolution according to the operator's configuration, such as part of the content of the IMS I except the country number and the network number.
  • the gateway selection execution node may reject the user's bearer setup request, or may select an access gateway according to the configuration of the roaming operator (eg, The default access gateway), or select an access gateway according to the information in the user subscription data (such as the default access gateway configured in the user subscription information), or reconstruct the APN for DNS resolution, and then perform DNS resolution to obtain Address information of the access gateway.
  • the default access gateway e.g. The default access gateway
  • the gateway selection execution node may reject the user's bearer setup request, or may select an access gateway according to the configuration of the roaming operator (eg, The default access gateway), or select an access gateway according to the information in the user subscription data (such as the default access gateway configured in the user subscription information), or reconstruct the APN for DNS resolution, and then perform DNS resolution to obtain Address information of the access gateway.
  • the gateway selection execution node may also attach the user's country number and/or network number included in the IMS I field in the user subscription data to the user using the construction method in the prior art.
  • the domain name of the operator may be constructed into the ⁇ S resolution request by the method of the embodiment of the present invention, and parsed by the DNS server.
  • the operator can automatically invalidate the DNS Ent ry configured by other operators' S servers by changing the value of the "APN resolves the additional carrier-specific suffix" field, or enable another user to use another carrier when the next time the bearer is established.
  • the gateway node provides the service to the user; or refuses to provide the user with the monthly service by adding the invalid carrier domain name as a suffix.
  • the gateway selection system of the mobile packet domain of this embodiment includes: a gateway selection execution node 1 and a first DNS server 2 for parsing a resolution request sent by the gateway selection execution node, and the gateway selects the execution node 1
  • the first module 11 is further configured to encapsulate the carrier domain name corresponding to the bearer setup request into the ⁇ S resolution request when constructing the DNS resolution request.
  • the first ⁇ S server serves as a DNS server of the roaming place or the home operator. If the first S server stores the carrier domain name and the address information of the access gateway corresponding to the carrier domain name, the ⁇ S parsing is performed. The first DNS server is queried, and the address information of the corresponding access gateway is retrieved and obtained according to the operator domain name, and then returned to the gateway execution node.
  • the first DNS server serves as the DNS server of the roaming operator. If the carrier domain name and the address information of the access gateway corresponding to the carrier domain name are not stored in the first DNS server, During the DNS resolution, the DNS resolution request is sent to the second DNS server 3, and the address information of the access gateway corresponding to the carrier domain name is obtained by using a standard domain name resolution method, where the second DNS server is the upper DNS of the first DNS server.
  • the server according to the standard DNS recursive query method, may involve one or more second DNS servers.
  • the difference from the above embodiment of the gateway selection system is that (only the figure is shown in the figure).
  • the difference from FIG. 11 further includes a user subscription data storage node 4, configured to store subscription data including a home carrier domain name feature corresponding to the user terminal, and deliver the subscription data to the gateway selection execution node. .
  • the gateway selection execution node in this embodiment adds a first module to the existing gateway selection execution node, and is configured to encapsulate the carrier domain name corresponding to the bearer setup request into the DNS resolution request when constructing the ⁇ s resolution request.

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Description

移动分组域的接入网关的选择方法、 系统及网关选择节点 技术领域
本发明涉及一种接入网关的选择方法、 系统及网关选择节点, 尤其是一 种在移动分组域中的接入网关的选择方法、 系统及网关选择节点。 背景技术
目前移动分组域网络的结构如图 1 所示, 其中 GGSN ( Gateway GPRS Supporting Node, 网关 GPRS支持节点)是移动通信网络与 IP网络的网关, 负责给 UE (User Equipment,用户终端)分配 IP地址使 UE能够访问 IP网络。 而 SGSN则负责资源管理和控制, 替用户选择合适的 GGSN, 为 UE和 GGSN之间 通信提供通道; HLR/HSS ( Home Location Register, 归属位置寄存器 /Home Subscription Storage,高速交换机) 负责用户签约数据的存储。
如图 1所示, 3GPP R7以后允许用户面数据直接在无线网络和 GGSN之间 传送, 而信令面则仍然通过 SGSN (GPRS服务支持节点)与无线网络相连, 称 为 One Tunnel架构。
3GPP正在进行简化移动分组域网络结构的标准化工作, 图 3、 图 4是可 能性较大的两种未来移动分组域网络结构, 其中 PDN GW (报文数据网网关) 和 Serving GW (服务网关)是从 GGSN演变而来, P匪 GW负责给 UE分配 IP 地址, 而 Serving GW的存在有利于在维持 PDN GW不变的情况下用户进行大 范围移动。 固 E (移动性管理实体)是从 SGSN演变而来, 负责资源管理和控 制, 替用户选择合适的 P匪 GW。
从以上描述可以看出, 无论是目前的移动分组域网络架构、 3GPPR7定义 的移动分组域网络架构还是未来可能的移动分组域网络架构, 都存在三个逻 辑节点: 网关节点、 网关选择执行节点、 用户签约数据储存节点, 其关系也 都是如图 5所示。
无论是目前的移动分组域网络架构、 3GPP R7定义的移动分组域网络架构 还是未来可能的移动分组域网络架构, 用户的签约数据都将在用户附着网络 时通过用户签约数据存储节点下发到网关选择执行节点, 用户移动时如果更 换了网关选择节点用户的签约数据也将通过用户签约数据存储节点下发到新 的网关选择执行节点, 用户签约数据发生变化时新的用户签约数据也将通过 用户签约数据存储节点下发到新的网关选择执行节点。 下发的流程如图 6 所 无论是目前的移动分组域网络架构、 3GPP R7定义的移动分组域网络架构 还是未来可能的移动分组域网络架构, 分组域网关的选择都是由网关选择执 行节点完成的, 流程如图 7所示, 主要包括如下步骤:
步骤 1、 用户设备向网关选择执行节点发送承载建立请求;
步骤 2、 网关选择执行节点构造匪 S ( Doma in Name Server , 域名服务器, 简称 DNS )请求消息;
步骤 3、 网关选择执行节点向 DNS服务器发送 DNS解析请求;
步骤 4、 DNS服务器进行解析后, 向网关执行节点返回 DNS解析结果; 步骤 5、网关选择执行节点从 DNS解析结果中选择一个网关节点为承载建 立请求的接入网关。
在步骤 2中, 网关选择执行节点一般通过将用户签约数据中 IMS I字段中 包含的用户的国家号和网络号附加到用户指示的 APN ( (Acces s Po int Name , 接入点名称)名字的后面以确定用于 DNS解析的 APN。 这样漫游用户即使和本 地用户所使用的 APN相同, 也能够根据国家号和网络号定位到合适的网关节 点 (运营商一般希望漫游到其他运营商的自己的用户流量能够回到自己的网 关节点进行处理)。
在步骤 3中, 一个运营商的 DNS服务器需要配置另一个运营商需要漫游 的 APN和那个运营商所拥有的国家号、 网络号的所有组合来支持来自那个运 营商的漫游用户。
在步骤 1 中, 如果用户终端没有显式的在承载建立请求消息中给出用户 指示的 APN , 则实际上表示用户希望使用缺省的 APN , 这样在步骤 2中网关选 择执行节点在构造用于匪 S解析的 APNX时将使用在用户签约数据中配置的缺 省 APN作为用户指示的 APN。
在步骤 2之前, 网关选择执行节点可能根据一些用户签约数据中包含的 字段和用户发送的承载建立请求消息中包含的字段进行网关节点的选择, 这 种情况下可能不需要执行步骤 2、 3、 4、 5。 例如用户发送的承载建立请求消 息中包含了用户希望使用的网关节点的 IP地址并且用户签约数据中也允许用 户使用该网关节点, 那么网关选择执行节点可以使用选择使用该网关节点为 用户提供服务。
在步骤 2之中,网关选择执行节点可能根据运营商的配置在构造用于 DNS 解析的 APM时附加上其他信息, 例如 IMS I (国际用户识别码)中除了国家号 和网络号之外的部分内容等等。
在步骤 5之后,如果由于 DNS解析结果中没有提供网关节点的 IP地址或 者 IP地址列表而无法在步骤 5中选择一个网关节点, 或者由于步骤 5中选择 的网关节点的 IP地址不可达时, 网关选择执行节点可以拒绝用户的承载建立 请求, 也可以根据运营商的配置选择一个网关节点(如默认网关节点), 或者 根据用户签约数据中的信息选择一个网关节点 (如用户签约信息中配置的默 认网关节点 ), 或者重新构造用于 DNS解析的 APNX重复步骤 3、 4、 5来解析 网关节点的地址。
通过分析上述现有技术可以看出, 存在如下缺陷:
1 )在现有技术中, 要实现漫游用户终端访问其归属运营商的网关节点, 漫游地的运营商的 DNS服务器需要配置归属地运营商的 APN ( Acces s Po int Name , 接入点的名称)名字和国家号、 网络号以及对应的网关地址, 这样在 DNS解析的过程中,漫游地的运营商的网关选择执行节点才可以获得归属地运 营商的网关节点的地址, 如果漫游地的运营商的 匪 S服务器中未配置归属地 运营商的接入网关节点的地址信息, 或者在漫游地的 匪 S服务器中存在与归 属地接入网关相同的 APN ( Acces s Po int Name , 接入点的名称)名字, 而未 存储归属地运营商的国家号、 网络号, 此种情况下, 无法为用户终端的选择 归属地运营商的网关。
2 )现有技术的网关选择方案对各运营商的 DNS服务器的配置要求较多, 一个运营商对应的 APN和国家号、 网络号以及对应的网关地址需要配置在多 个其他运营商的 匪 S服务器中, 当该运营商的网关地址变化, 或者增加了新 的网络号时, 需要修改其他运营商的 DNS服务器, 数据更新极为不便。
3 )对于一个运营商的 DNS服务器, 也需要至少存储运营商对应的 APN和 国家号、 网络号以及对应的网关地址等内容, 由于国家号、 网络号并不能唯 一对应一个运营商, 一个运营商可能有多个网络号, 这样在运营商的 DNS服 务器需要按照国家号、 网络号的不同进行分别存储, 极大了浪费了运营商的 DNS服务器的存储成本。
4 )现有的网关选择方案, 在进行 DNS解析的过程中, 很不灵活, 受到漫 游地运营商的 DNS服务器存储的信息的限制, 不便于归属地运营商开展漫游 业务。 发明内容 本发明的目的是提供一种移动分组域的网关选择方法、 系统及网关选择 执行节点, 在漫游地执行网关选择的操作时, 减少漫游地 DNS解析服务器对 网关选择的限制以及根据国家号、 网络号进行网关地址解析所带来的限制。
为实现上述目的, 本发明提供了一种移动分组域的接入网关的选择方法, 包括:
当网关选择执行节点收到用户终端发送的承载建立请求后, 在构造 匪 S 解析请求时, 网关选择执行节点将所述承载建立请求对应的运营商域名封装 到 DNS解析请求中, 发送给 DNS服务器;
匪 S服务器进行接入网关的地址解析;
匪 S服务器向网关选择执行节点返回 DNS解析结果,该 DNS解析结果中包 含所述运营商域名对应的接入网关的地址信息;
所述网关选择执行节点根据所述地址信息选择与所述运营商域名对应的 接入网关作为所述承载建立请求所对应的接入网关。
本发明还提供了一种移动分组域的接入网关的选择系统, 包括网关选择 执行节点和用于对网关选择执行节点发送的解析请求进行解析的第一匪 S服 务器, 所述网关选择执行节点还设有第一模块, 用于在构造匪 S解析请求时, 将所述承载建立请求对应的运营商域名封装到 DNS解析请求中。
本发明还提供了一种网关选择执行节点, 其设置有一第一模块, 用于在 构造 DNS解析请求时, 将所述承载建立请求对应的运营商域名封装到 DNS解 析请求中。
由上述技术方案可知, 本发明在为用户终端选择所对应的运营商的接入 网关时, 引入了用运营商域名解析机制, 具有如下有益效果:
1 )减少了漫游地 DNS解析服务器的对网关选择的限制, 漫游地的运营商 的 DNS服务器即使不存储归属地运营商的接入网关的地址信息, 也同样可以 为漫游的用户终端选择到归属地的接入网关;
2 ) 当一个运营商的网关地址变化, 或者增加了新的网络号以及其他相关 信息发生变化时, 不需要修改其他运营商的匪 S服务器中的数据;
3 ) 降低了漫游地运营商的 DNS服务器的数据存储的成本。
下面通过附图和实施例, 对本发明的技术方案做进一步的详细描述。 附图说明
图 1为现有技术中所使用的移动分组域网的结构示意图; 图 2为现有技术中 3GPP R7定义的移动分组域网络结构示意图; 图 3为现有技术中记载的可能的未来移动分组域网结构示意图一; 图 4为现有技术中记载的可能的未来移动分组域网结构示意图二; 图 5为现有技术中抽象化的移动分组域网元节点间的关系示意图; 图 6为现有技术中用户签约数据下发流程图;
图 7为移动分组域中选择接入网关节点的流程图;
图 8为本发明的移动分组域的网关选择方法实施例一的流程图; 图 9为本发明的移动分组域的网关选择方法实施例二的流程图; 图 1 0为本发明的移动分组域的网关选择方法实施例三的流程图
图 1 1为本发明的移动分组域的网关选择系统实施例一的结构示意图一; 图 12为本发明的移动分组域的网关选择系统实施例一的结构示意图二; 图 1 3为本发明的移动分组域的网关选择系统实施例二的结构示意图。 具体实施方式
本发明的移动分组域的网关选择方法实施例一
参见图 8 , 其为本发明的移动分组域的网关选择方法的实施例一的流程 图, 本发明在为用户终端选择所对应的运营商的接入网关时, 引入了用运营 商域名解析机制, 具体流程如下:
步骤 1 01、 用户终端向网关选择执行节点发送承载建立请求;
步骤 1 02、在构造 DNS解析请求时, 将网关选择执行节点将该用户终端对 应的运营商域名封装到 匪 S解析请求中; 该步骤可以具体为: 网关选择执行 节点使用归属地运营商域名特征和接入点名称构造承载建立请求对应的运营 商域名; 网关选择执行节点在利用 匪 S服务器进行 APN解析之前, 在用户签 约数据存储节点存储的用户数据中增加一个字段来存储用户终端对应的运营 商域名, 其作为 APN解析需要附加的运营商特定后缀, 将该特定后缀附加到 用户终端发送的建立承载请求中携带的 APN之后, 形成用于 DNS解析的 APN; 步骤 1 03、网关选择执行节点将包含有运营商域名的 DNS解析请求发送给 DNS服务器;
步骤 1 04、 DNS服务器进行接入网关的地址解析;
步骤 1 05、 DNS服务器向网关选择执行节点返回解析结果, 该解析结果中 包含有运营商域名对应的接入网关的地址信息的;
步骤 1 06、网关选择执行节点根据地址信息选择与运营商域名对应的接入 网关作为承载建立请求所对应的接入网关。
在本实施例中, 网关选择执行节点可以从用户签约数据存储节点获取到 用户终端对应的运营商域名。 在用户签约数据存储节点存储用户终端对应归 属地运营商域名特征的用户签约数据, 通过向网关选择执行节点下发用户签 约数据的过程将归属地运营商域名特征下发到网关选择执行节点。
具体来说, 可以在用户签约数据存储节点存储的用户数据中增加一个字 段来存储用户终端对应的运营商域名, 其作为 APN解析需要附加的运营商特 定后缀, 该特定后缀是在网关选择节点利用 匪 S服务器进行 APN解析之前需 要附加的。 该特定后缀可以为一长度可变的字符串 (标准化中也许会规定该 字符串的最大长度以免相关消息的大小失去控制)。 运营商可以使用类似
"chinamobi le. com" 的字符串 (运营商自己拥有的域名 )作为该字段的值, 这样在 DNS的解析过程中, 可以将 DNS解析请求转发到运营商自己的 DNS服 务器, 从而可以最终获得运营商的接入网关节点的地址。 对于运营商来说, 也可以有更广泛的扩展应用, 对于一个运营商来说, 可以配置多个运营商域 名,每个域名对应各自的接入网关,例如:可以配置成" chinamobi lel. com" 、
"chinamobi le2. com"等, 由于将运营商域名的解析机制引入到了网关选择 执行节点选择接入网关的过程中, 通过灵活的配置运营商域名, 即可灵活的 选择接入网关节点, 使得接入网关的选择不再受漫游地的匪 S服务器的限制, 使得运营商更加灵活的开展漫游地的业务。
在本实施例中, 在构造匪 S解析请求之前, 网关选择执行节点判断承载 建立请求中是否包含用户终端指示的接入点名称, 如果用户终端发送的承载 建立请求中包含用户终端指示的接入点名称, 则网关选择执行节点将其作为 接入点名称来构造运营商域名;如果用户终端发送的承载建立请求不包含用 户终端指示的接入点名称, 则网关选择执行节点使用在用户签约数据中配置 的缺省接入点名称作为接入点名称来构造运营商域名。
在本实施例中, 网关选择执行节点在构造匪 S解析请求时, 构造承载建 立请求对应的运营商域名所使用的信息还可以包括: 国际移动用户识别码中 的国家号和 /或网络号, 或者除了国家号和网络号之外的其他信息构造承载建 立请求对应的运营商域名。
本发明的移动分组域的网关选择方法实施例二
在本实施例中, 网关选择执行节点为用户终端的漫游地或归属地的网关 选择执行节点, DNS服务器为漫游地或归属地运营商的 DNS服务器, 漫游地或 归属地的运营商的 DNS服务器中存储有用户终端对应的运营商域名 (即归属 地运营商的域名) 以及该运营商域名对应的接入网关的地址, 本实施例的流 程如图 9所示, 包括:
步骤 201、 用户终端向网关选择执行节点发送承载建立请求;
步骤 202、在构造 DNS解析请求时, 网关选择执行节点将该用户终端对应 的归属地运营商的域名封装到匪 S解析请求中;
步骤 203、网关选择执行节点将包含有运营商域名的 DNS解析请求发送给 漫游地运营商的 DNS服务器;
步骤 204、 查询漫游地或归属地运营商的 DNS服务器, DNS服务器根据运 营商域名进行检索、 并获取与其对应的接入网关的地址;
步骤 205、漫游地或归属地运营商的 DNS服务器向网关选择执行节点返回 解析结果, 该解析结果中包含有归属地运营商的域名所对应的接入网关的地 址信息的;
步骤 206、网关选择执行节点根据地址信息选择与运营商域名对应的接入 网关作为承载建立请求所对应的接入网关。
本发明的移动分组域的网关选择方法实施例三
在本实施例中, 用户终端处于漫游状态, 网关选择执行节点为用户终端 的漫游地的网关选择执行节点, DNS服务器为所述漫游地运营商的 DNS服务器, 漫游地运营商的 DNS服务中没有存储归属地运营商的域名以及所述运营商域 名对应的接入网关的地址, 本实施例的流程如图 10所示, 包括:
步骤 301、 用户终端向网关选择执行节点发送承载建立请求;
步骤 302、在构造 DNS解析请求时, 网关选择执行节点将该用户终端对应 的归属地运营商的域名封装到匪 S解析请求中;
步骤 303、网关选择执行节点将包含有运营商域名的 DNS解析消息请求发 送给漫游地运营商的 DNS服务器;
步骤 304、 查询漫游地运营商的 DNS服务器, 未获得该归属地运营商的域 名对应的接入网关的地址信息 (即用户终端在承载请求中指示的 APN名称对 应的 DNS入口 (DNS Ent ry ) );
步骤 305、漫游地运营商的 DNS服务器将该解析请求向上一级的 DNS服务 器转发, 根据标准的匪 S递归查询方法进行 DNS递归解析, 直到获得该归属 地运营商的域名对应的接入网关的地址信息为止;
就本步骤来说, 由于釆用的是标准的域名解析, 只要该域名是合法的, 也必然可以完成解析并获取到其对应的接入网关节点的地址(无论其他 匪 S 服务器中是否能够解析, 该解析请求最终可以转发到归属的运营商的 匪 S服 务器中, 并获得接入网关的地址), 并且该运营商的域名在全球具有唯一性, 运营商可以配置多个域名, 将每个域名对应不同的接入网关, 避免了通过国 家号和网络号来确定接入网关节点的缺陷。
如果漫游地运营商的 匪 S服务器中找不到业务建立请求中用户终端指示 的 APN所对应的 DNS Ent ry (往往由于该用户是漫游用户;), 将根据标准的 DNS 递归查询方法进行 DNS递归解析, 只要该用户所归属的运营商的 DNS服务器 中有对应的 DNS Ent ry , 正确的解析结果将发送给网关选择执行节点, 从而网 关选择执行节点能够获得接入网关的 IP地址。
步骤 306、漫游地运营商的 DNS服务器的上一级的 DNS服务器返回 DNS解 析结果;
步骤 307、 漫游地运营商的 DNS服务器接受到上一级 DNS服务器返回的 DNS解析结果后, 向网关选择执行节点返回该解析结果, 该解析结果中包含有 用户终端归属地的运营商域名对应的接入网关的地址信息;
步骤 308、网关选择执行节点根据地址信息选择与运营商域名对应的接入 网关作为承载建立请求所对应的接入网关。
另外, 需要说明的是, 上述本发明实施例中的技术方案, 与现有技术中 的网关选择方案并不冲突, 可以结合现有的技术方案一起使用。
在上述实施例中, 如果用户终端没有显式的在承载建立请求消息中给出 用户指示的 APN, 则实际上表示用户希望使用缺省的 APN , 这样在网关选择执 行节点在构造用于 DNS解析的 APN时, 网关选择执行节点将使用在用户签约 数据中配置的缺省 APN作为用户指示的 APN。
网关选择执行节点仍然可以根据一些用户签约数据中包含的字段和用户 发送的承载建立请求消息中包含的字段进行接入网关的选择, 这种情况下可 能不需要后续的插入运营商域名的步骤以及后续的解析过程, 可以完全按照 现有的网关选择流程执行。 例如用户终端发送的承载建立请求消息中包含了 用户希望使用的接入网关的 IP地址并且用户签约数据中也允许用户使用该接 入网关, 那么网关选择执行节点可以选择使用该接入网关为用户提供服务。
网关选择执行节点可以根据运营商的配置在构造用于匪 S解析的 APN时 附加上其他信息, 例如 IMS I中除了国家号和网络号之外的部分内容等等。
如果由于 DNS解析结果中没有提供网关节点的 IP地址或者 IP地址列表 而无法选择一个接入网关, 或者由于选择的接入网关的 IP地址不可达时, 网 关选择执行节点可以拒绝用户的承载建立请求, 也可以根据漫游地运营商的 配置选择一个接入网关 (如默认的接入网关 ), 或者根据用户签约数据中的信 息选择一个接入网关(如用户签约信息中配置的默认接入网关), 或者重新构 造用于 DNS解析的 APN, 然后进行 DNS解析来获得接入网关的地址信息。在重 新构造用于匪 S解析的 APN时, 网关选择执行节点还可以使用现有技术中的 构造方法, 将用户签约数据中 IMS I 字段中包含的用户的国家号和 /或网络号 附加到用户指示的 APN的后面以确定用于 DNS解析的 APN,也可以用本发明实 施例的方法, 将运营商的域名构造到匪 S解析请求中去, 由 DNS服务器进行 解析。
另外, 运营商可以通过更改 "APN解析需要附加的运营商特定后缀" 字段 的值, 使得其他运营商匪 S服务器所配置的 DNS Ent ry 自动失效; 或者实现 特定用户下次建立承载时使用另一个网关节点对该用户提供服务; 或者通过 加入无效的运营商域名作为后缀来拒绝对该用户提供月良务。
本发明的移动分组域的网关选择系统实施例一
如图 11所示, 本实施例的移动分组域的网关选择系统包括: 网关选择执 行节点 1和用于对网关选择执行节点发送的解析请求进行解析的第一 DNS服 务器 2 , 网关选择执行节点 1还设有第一模块 11 , 用于在构造 DNS解析请求 时, 将承载建立请求对应的运营商域名封装到匪 S解析请求中。
本实施例的网关选择系统可以存在两种情况:
1 )第一匪 S服务器作为漫游地或归属地运营商的 DNS服务器, 如果第一 S 服务器中存储有运营商域名以及该运营商域名对应的接入网关的地址信 息, 则在进行匪 S解析时, 查询该第一 DNS服务器, 根据运营商域名检索并 获取与其对应的接入网关的地址信息, 然后返回给网关执行节点即可。
2 )如图 12所示, 第一 DNS服务器作为漫游地运营商的 DNS服务器, 如 果第一 DNS服务器中未存储有运营商域名以及该运营商域名对应的接入网关 的地址信息,则在进行 DNS解析时,将 DNS解析请求发送给第二 DNS服务器 3 , 通过标准的域名解析的方式获取运营商域名对应的接入网关的地址信息, 其 中, 第二 DNS服务器为第一 DNS服务器的上级 DNS服务器, 根据标准的 DNS 递归查询方法, 所涉及的第二 DNS服务器可能为一个或多个。
本发明的移动分组域的网关选择系统实施例二
如图 1 3所示, 与上述网关选择系统实施例一不同之处在于(图中仅示出 了与图 11所不同之处),还包括用户签约数据存储节点 4 , 用于存储包含有用 户终端对应的归属地运营商域名特征的签约数据, 并将该签约数据下发到网 关选择执行节点。
本发明的网关选择执行节点的实施例
本实施例的网关选择执行节点, 在现有的网关选择执行节点中增设一第 一模块, 用于在构造匪 s解析请求时, 将承载建立请求对应的运营商域名封 装到 DNS解析请求中。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案而非对其进 行限制, 尽管参照较佳实施例对本发明进行了详细的说明, 本领域的普通技 术人员应当理解: 其依然可以对本发明的技术方案进行修改或者等同替换, 而这些修改或者等同替换亦不能使修改后的技术方案脱离本发明技术方案的 ^"神和范围。

Claims

权 利 要 求
1、 一种移动分组域的接入网关的选择方法, 其特征在于, 包括: 当网关选择执行节点收到用户终端发送的承载建立请求后, 在构造匪 s 解析请求时, 网关选择执行节点将所述承载建立请求对应的运营商域名封装 到 DNS解析请求中, 发送给 DNS服务器;
匪 S服务器进行接入网关的地址解析;
匪 S服务器向网关选择执行节点返回 DNS解析结果, 该 DNS解析结果中 包含所述运营商域名对应的接入网关的地址信息;
所述网关选择执行节点根据所述地址信息选择与所述运营商域名对应的 接入网关作为所述承载建立请求所对应的接入网关。
2、根据权利要求 1所述的方法, 其特征在于, 在网关选择执行节点收到 用户终端发送的承载建立请求之前还包括: 用户签约数据存储节点将包含有 所述用户终端对应的归属地运营商域名特征的用户签约数据下发到所述网关 选择执行节点。
3、根据权利要求 1所述的方法, 其特征在于, 所述网关选择执行节点为 所述用户终端的漫游地或归属地的网关选择执行节点, 所述匪 S服务器为漫 游地或归属地运营商的 DNS服务器, 所述漫游地或归属地运营商的 DNS服务 器中存储有所述运营商域名以及所述运营商域名对应的接入网关的地址信 息;
所述进行接入网关的地址解析具体为:
查询所述漫游地或归属地运营商的 DNS服务器, 根据所述运营商域名进 行检索, 并获取与其对应的接入网关的地址信息。
4、根据权利要求 1所述的方法, 其特征在于, 所述网关选择执行节点为 所述用户终端的漫游地的网关选择执行节点, 所述 DNS服务器为漫游地运营 商的 DNS服务器, 所述漫游地运营商的 DNS服务器中没有存储所述运营商域 名以及所述运营商域名对应的接入网关的地址信息;
所述进行接入网关的地址解析具体为:
漫游地运营商的 DNS服务器将该解析请求发送给其上一级的 DNS服务器, 通过标准的域名解析的方式获取所述运营商域名对应的接入网关的地址信 息。
5、根据权利要求 2所述的方法, 其特征在于, 将所述承载建立请求对应 的运营商域名封装到匪 S解析消息中具体为:
所述网关选择执行节点使用所述归属地运营商域名特征和接入点名称构 造所述承载建立请求对应的运营商域名。
6、根据权利要求 5所述的方法,其特征在于,在构造 DNS解析请求之前, 网关选择执行节点判断所述承载建立请求中是否包含用户终端指示的接入点 名称,如果用户终端发送的承载建立请求中包含用户终端指示的接入点名称, 则网关选择执行节点将其作为接入点名称来构造所述运营商域名;如果用户 终端发送的承载建立请求不包含用户终端指示的接入点名称, 则网关选择执 行节点使用在用户签约数据中配置的缺省接入点名称作为接入点名称来构造 所述运营商域名。
7、根据权利要求 5所述的方法, 其特征在于, 所述网关选择执行节点在 构造 DNS解析请求时, 构造所述承载建立请求对应的运营商域名所使用的信 息还包括: 国际移动用户识别码中的国家号和 /或网络号, 或除了国家号和网 络号之外的其他信息。
8、根据权利要求 1所述的方法,其特征在于,在构造 DNS解析请求之前, 网关选择执行节点判断承载建立请求中是否包含用户终端希望使用的接入网 关的 IP地址,如果用户终端发送的承载建立请求中包含了用户终端希望使用 的接入网关的 IP地址,并且用户签约数据中也允许该用户终端使用该接入网 关,则网关选择执行节点直接根据承载建立请求中包含的接入网关的 IP地址 信息选择该接入网关作为承载建立请求所对应的接入网关。
9、 根据权利要求 1所述的方法, 其特征在于, 如果所述 DNS解析结果不 包含网关节点的地址信息或者所述网关节点无法连接, 则所述网关选择执行 节点拒绝用户终端的承载建立请求或根据漫游地运营商的配置策略选择默认 的接入网关作为用户终端的承载建立请求所对应的接入网关, 或者根据用户 签约数据中的信息选择一个接入网关作为所述用户终端的所述承载建立请求 所对应的接入网关, 或者重新构造解析请求, 重新执行接入网关的地址解析 的操作。
10、 根据权利要求 9 所述的方法, 其特征在于, 在所述重新构造解析请 求操作中, 网关选择执行节点将用户签约数据中国际移动用户识别码字段中 包含的用户终端的国家号和 /或网络号附加到用户终端指示的接入点名称的 后面, 重新构造一个解析请求。
11、 根据权利要求 5 所述的方法, 其特征在于, 根据不同的所述归属地 运营商域名特征分别对应归属地运营商的不同类的用户终端。
12、 一种移动分组域的接入网关的选择系统, 包括网关选择执行节点和 用于对网关选择执行节点发送的解析请求进行解析的第一 DNS服务器, 其特 征在于, 所述网关选择执行节点还设有第一模块, 用于在构造 DNS解析请求 时, 将所述承载建立请求对应的运营商域名封装到 DNS解析请求中。
1 3、 根据权利要求 12所述的系统, 其特征在于, 所述第一 DNS服务器为 漫游地或归属地运营商的 DNS服务器, 所述第一 DNS服务器中存储有所述运 营商域名以及该运营商域名对应的接入网关的地址信息。
14、 根据权利要求 12所述的系统, 其特征在于, 还包括一个或一个以上 的第二 DNS服务器, 所述第二 DNS服务器为所述第一 DNS服务器的上级 DNS 服务器;
所述第一匪 S服务器为漫游地运营商的 DNS服务器, 所述第一 DNS服务 没有存储有所述运营商域名以及该运营商域名对应的接入网关的地址信息; 所述第一 DNS服务器和第二匪 S服务器, 用于对解析请求消息中的运营 商域名执行标准的域名解析操作。
15、 根据权利要求 12或 1 3或 14所述的系统, 其特征在于, 还包括用户 签约数据存储节点, 用于存储包含有用户终端对应的归属地运营商域名特征 的签约数据, 并将该签约数据下发到所述网关选择执行节点。
16、 一种网关选择执行节点, 其特征在于, 设置有一第一模块, 用于在 构造 DNS解析请求时, 将承载建立请求对应的运营商域名封装到 DNS解析请 求中。
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CN101420762B (zh) 2011-02-23
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US20100303009A1 (en) 2010-12-02
JP5068855B2 (ja) 2012-11-07
EP2205040B1 (en) 2017-03-22
EP2205040A4 (en) 2014-03-19
US8995334B2 (en) 2015-03-31
RU2010112648A (ru) 2011-10-10
CN101420762A (zh) 2009-04-29
KR20100068457A (ko) 2010-06-23
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RU2462840C2 (ru) 2012-09-27
JP2010541508A (ja) 2010-12-24

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