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 PDFInfo
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- 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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- gateway
- domain name
- operator
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/17—Selecting a data network PoA [Point of Attachment]
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- 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
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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- 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
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4588—Network 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
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/681,321 US8995334B2 (en) | 2007-10-23 | 2008-10-20 | Method and system for selecting access gateway and gateway selection execution node in mobile packet domain |
EP08851242.1A EP2205040B1 (en) | 2007-10-23 | 2008-10-20 | Method and system for selecting access gateway and gateway selection execution node in mobile packet domain |
KR1020107008484A KR101111153B1 (ko) | 2007-10-23 | 2008-10-20 | 모바일 패킷 도메인의 접속 게이트웨이 선택 방법, 시스템 및 게이트웨이 선택 노드 |
BRPI0819467 BRPI0819467A2 (pt) | 2007-10-23 | 2008-10-20 | Método de seleção de gateway de acesso, sistema e bloco de implementação de seleção de gateway no âmbito de grupos móveis |
JP2010528266A JP5068855B2 (ja) | 2007-10-23 | 2008-10-20 | モバイル・パケット・ドメインにおけるアクセスゲートウェイの選択方法、システム及びゲートウェイ選択ノード |
Applications Claiming Priority (2)
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CN200710176228.6 | 2007-10-23 | ||
CN200710176228.6A CN101420762B (zh) | 2007-10-23 | 2007-10-23 | 接入网关的选择方法、系统及网关选择执行节点 |
Publications (1)
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WO2009065335A1 true WO2009065335A1 (fr) | 2009-05-28 |
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PCT/CN2008/072753 WO2009065335A1 (fr) | 2007-10-23 | 2008-10-20 | Procédé et système de sélection de passerelle d'accès et nœud mettant en œuvre la sélection de passerelle de domaine de groupe mobile |
Country Status (8)
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US (1) | US8995334B2 (zh) |
EP (1) | EP2205040B1 (zh) |
JP (1) | JP5068855B2 (zh) |
KR (1) | KR101111153B1 (zh) |
CN (1) | CN101420762B (zh) |
BR (1) | BRPI0819467A2 (zh) |
RU (1) | RU2462840C2 (zh) |
WO (1) | WO2009065335A1 (zh) |
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EP2205040A1 (en) | 2010-07-07 |
CN101420762B (zh) | 2011-02-23 |
BRPI0819467A2 (pt) | 2015-05-05 |
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 |
KR101111153B1 (ko) | 2012-02-24 |
RU2462840C2 (ru) | 2012-09-27 |
JP2010541508A (ja) | 2010-12-24 |
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