WO2012034301A1

WO2012034301A1 - Method and system for diameter routing

Info

Publication number: WO2012034301A1
Application number: PCT/CN2010/078373
Authority: WO
Inventors: 张志华; 张强; 于波; 刘智江
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-14
Filing date: 2010-11-03
Publication date: 2012-03-22
Also published as: CN101945047A; CN101945047B

Abstract

Disclosed is a method for diameter routing. The method includes: after a call between a Code Division Multiple Access (CDMA) network user and an Internet Protocol Multimedia Sub-system (IMS) user is established, in the process of sending charging information to an IMS network, the user number of the IMS user is utilized as a main keyword of a diameter message routing for seeking a route. Also disclosed are a diameter routing system and a Media Gateway Control Function (MGCF) device. The present invention does not need to set the correspondence between a user number and a Charging Gateway (CG) domain name in the IMS network element, and does not need the IMS network element to send the CG domain name obtained according to the user number to the MGCF network element during the call process, thereby reducing the message traffic.

Description

Diameter routing method and system

TECHNICAL FIELD The present invention relates to the field of mobile communications, and in particular, to a Diameter routing method and system, and an MGCF device.

Background technique

In today's universal application of communication network systems, in order to ensure the security and commercial use of communication networks, the use of various resources in the communication network requires support for authentication, authorization, and accounting functions through the communication network system. Currently, the two main communication network used by the system to identify, authorization, accounting _{(Authentication, Authorization ¾ Accounting, AAA} ) application protocol Radius and Diameter protocol. The Diameter protocol is a new generation of AAA technology that overcomes many of the drawbacks of the Radius protocol and is gaining more and more attention with its powerful scalability and security guarantees. In the International Telecommunication Union (ITU), 3rd Generation Partnership Project (3GPP) and 3GPP2 and other international standards organizations, it has been officially adopted as the Next Generation Network (Next Generation Network, The preferred AAA protocol for future communication networks such as NGN), Wideband Code Division Multiple Access (WCDMA) and CDMA2000.

In the CDMA2000 system, when the traditional CDMA network and the IP Multimedia Subsystem (IMS) network interwork, after the call is connected to the call, the Media Gateway Control Function (MGCF) network in the traditional CDMA network is required. The charging information of the call is sent to the Charging Gateway (CG) charging center in the IMS network. Currently, the Diameter protocol is used in the industry to transmit charging information. The Diameter message routing is specified in the RFC3588 Diameter protocol. Domain-based routing table approach. All domain-based route lookups rely on domain routing tables. The domain routing table entry contains the following fields:

--domain name. This field is typically used as the primary key in routing table queries. Note that some practical applications are based on the principle of "longest match from the right end" when executing a query, without requiring an exact match. - Application identifier. An application is identified by the carrier ID and the application ID. Currently the carrier ID is set to "0". A routing entry may have different destinations based on the Attribute Value Pair (AVP) in the message. The application identifier must be used as the second key field for the routing table query. - Local action. The Local Action field is used to identify how a message will be processed. The following actions are supported:

• Local (LOCAL) - Diameter messages with local actions set to LOCAL can be processed locally without being routed to other servers.

• RELAY - All Diameter messages of this type must be routed to the next hop server without modifying any non-routed AVPs.

• Proxy (PROXY) - All Diameter messages belonging to this type must be routed to the next hop server. The local server can enforce the local policy by inserting a new AVP into the message before routing.

• REDIRECT - All Diameter messages belonging to this type must be appended with the identity of the Diameter server and returned to the sender of the message. As can be seen from the above description, for the Diameter message routing domain name as the primary key, and when the MGCF sends a message to the CG charging center, the domain name of the CG is used as the primary key of the message routing. As shown in Figure 1, in order to implement different CG charging centers to manage different numbers, the IMS network elements need to be mapped to different CG domain names according to different numbers, and then delivered to the MGCF network element when the call is connected. FIG. 1 is a flow chart of charging reporting based on a domain name for Diameter routing, including:

101: Before the IMS network element is put into operation, map different numbers or number segments to different CG domain names. Such as 999900001 <-> cgl.example.com.cn, 888800001 <-> cg2.example.com.cn.

102: The CDMA network user calls the IMS user or the IMS user to call the CDMA network user, the call is established between the MGCF and the IMS network element, and the IMS network element transmits the CG domain name to the MGCF.

103: The MGCF uses the CG domain name as the primary key, finds the route record in the routing table, and obtains the local action as: RELAY, sends an Accounting Request (ACR) Message.

104: The MGCF sends the encoded ACR message to the IMS network element through the underlying link.

105: The CG charging center receives the ACR message, extracts the destination domain name AVP in the message, and searches for the routing record in the routing table as the primary key, and obtains the result local action as: LOCAL, the message is processed in the CG charging center.

106: The CG charging center processes the ACR message, and returns an Accounting Answer (ACA) message to the MGCF, and sends the message to the MGCF network element through the underlying link.釆 Use the method described in Figure 1 to implement different CG management for different number of users. The disadvantage is that the IMS network element needs to set the correspondence between the user number and the CG domain name. At the same time, the CG domain name needs to be obtained according to the user number during the call. The MGCF network element also increases the message traffic between the IMS and the MGCF network element.

Summary of the invention

The technical problem to be solved by the present invention is to propose a Diameter routing method and system and a

The MGCF device does not need to set the correspondence between the user number and the CG domain name in the IMS network element. The IMS network element does not need to obtain the CG domain name according to the user number and send it to the MGCF network element during the call, which reduces the message traffic. In order to solve the above problem, the present invention provides a Diameter routing method, including: after a CDMA network user and an IP Multimedia Subsystem (IMS) user establish a call, use the IMS user in the process of sending charging information to the IMS network. The user number is used as the primary key for the Diameter message route to find the route. The use of the IMS user's subscriber number as the primary key of the Diameter message routing includes: when the CDMA network subscriber calls the IMS subscriber, the called number is used as the primary key of the Diameter message routing; when the IMS subscriber calls the CDMA network subscriber, the IMS subscriber uses The calling number is used as the primary key for the Diameter message routing. The method further includes: a media gateway control function (MGCF) configuring and saving a mapping relationship between a user number of the IMS user and the charging gateway; when the CDMA network user calls the IMS user, using the user number of the IMS user as the primary of the Diameter message routing The step of searching for a route by the keyword includes: the MGCF extracts the called number, uses the called number as a primary key to search a routing table, and obtains a corresponding charging gateway; and uses the user number of the IMS user as a Diameter message routing. After the step of the primary key to find the route, the method further includes: the MGCF sending an accounting request message to the charging gateway, where the charging request message carries the called number information. The method further includes: MGCF configuring and saving a mapping relationship between the user number of the IMS user and the charging gateway; when the IMS user calls the CDMA network user, the step of using the user number of the IMS user as the primary key of the Diameter message routing to search for the route include:

The MGCF extracts the calling number, uses the calling number as the primary key to search the routing table, and obtains the corresponding charging gateway. After the step of using the user number of the IMS user as the primary key of the Diameter message routing, the step of searching for the route is performed. The method further includes: the MGCF sending an accounting request message to the charging gateway, where the charging request message carries calling number information. The method further includes: after receiving the charging request message, the charging gateway extracts the called number and the calling number from the charging request message, and determines that at least one of the charging belongs to the charging At the time of the gateway, the charging request message is received and processed. In order to solve the above problem, the present invention also provides a Diameter routing system, the system comprising a media gateway control function (MGCF), the MGCF being set as: after a call is established between a CDMA network user and an IP Multimedia Subsystem (IMS) user In the process of sending the charging information to the IMS network, the user number of the IMS user is used as the primary key of the Diameter message routing to search for the route. The MGCF is set to: when the CDMA network user calls the IMS user, the called party is used. The number is used as the primary key of the Diameter message routing; when the IMS user calls the CDMA network user, the calling number is used as the primary key of the Diameter message routing. The MGCF is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway; the MGCF is configured to use the user number of the IMS user as the primary key to find the route of the Diameter message routing as follows: When the CDMA network user calls the IMS user, the called number is extracted, and the called number is used as the primary key to search the routing table to obtain the corresponding charging gateway; and the MGCF is further configured to: send the meter to the charging gateway. The fee request message, where the charging request message carries the called number information. The MGCF is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway; the MGCF is configured to use the user number of the IMS user as the primary key to find the route of the Diameter message routing as follows: When the IMS user calls the CDMA network user, the calling number is extracted, and the calling number is used as the primary key to search the routing table, and the corresponding charging gateway is obtained;

The MGCF is further configured to: send an accounting request message to the charging gateway, where the charging request message carries calling number information. The system further includes a charging gateway, and the charging gateway is configured to: after receiving the charging request message, extract the called number and the calling number from the charging request message, and determine at least one of the When the accounting gateway belongs to the charging gateway, the charging request message is received and processed. In order to solve the above problem, the present invention further provides a media gateway control function (MGCF) device, where the MGCF device is configured to: after the CDMA network user and the IP multimedia subsystem (IMS) user establish a call, send charging information. In the process of the IMS network, the user number of the IMS user is used as the primary key of the Diameter message route to find the route. The MGCF device is configured to: use when a CDMA network user calls an IMS user The called number is used as the primary key of the Diameter message routing; when the IMS user calls the CDMA network user, the calling number is used as the primary key of the Diameter message routing. The MGCF device is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway; the MGCF device is configured to use the user number of the IMS user as follows

The primary key search route of the Diameter message route: when the CDMA network user calls the IMS user, extracts the called number, uses the called number as the primary key to search the routing table, and obtains the corresponding charging gateway; and the MGCF device The method further includes: sending an accounting request message to the charging gateway, where the charging request message carries the called number information. The MGCF device is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway; the MGCF device is configured to use the user number of the IMS user as the primary key to find the route of the Diameter message routing as follows When the IMS user calls the CDMA network user, the calling number is extracted, and the calling number is used as the primary key to search the routing table to obtain the corresponding charging gateway. The MGCF device is further configured to: The charging request message is sent, and the charging request message carries the calling number information. The method of the present invention uses the calling number or the called number in the call as the primary key of the Diameter message routing, and does not need to set the correspondence between the user number and the CG domain name in the IMS network element, and does not require the IMS network element to be in the call. In the process, the CG domain name is sent to the MGCF network element according to the user number, which reduces the message traffic. In addition, since the ACR message sent by the MGCF to the CG charging center already has the calling number and the called number, no additional overhead is required.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a CG domain name charging report; FIG. 2 is a flow chart of a billing report based on a called number of the present invention; FIG. 3 is a flow chart of the charging and reporting based on the calling number of the present invention.

A preferred embodiment of the present invention provides a Diameter routing method, including: after a CDMA network user and an IP Multimedia Subsystem (IMS) user establish a call, in the process of transmitting charging information to the IMS network, using the IMS The user's user number is used as the primary key of the Diameter message route to find the route. When the CDMA network user calls the IMS user, the called number is used as the primary key of the Diameter message routing; when the IMS user calls the CDMA network user, the calling number is used as the primary key of the Diameter message routing. The media gateway control function (MGCF) configures and saves the mapping relationship between the user number of the IMS user and the charging gateway. When the CDMA network user calls the IMS user, the method includes: the MGCF extracts the called number, and uses the called number. The routing table is searched as a primary key, and the corresponding charging gateway is obtained, and the charging request message is sent to the charging gateway, where the charging request message carries the called number information; After the fee request message, the called number and the calling number are extracted from the charging request message, and when at least one of the charging gateways is determined to belong to the charging gateway, the charging request message is received and processed. When the IMS user calls the CDMA network user, the method includes: the MGCF extracts the calling number, uses the calling number as the primary key to search the routing table, obtains the corresponding charging gateway, and sends an accounting request message to the charging gateway. The charging request message carries the calling number information; after receiving the charging request message, the charging gateway extracts the called number and the calling number from the charging request message, and determines at least one of the When one of the charging gateways belongs to the charging gateway, the charging request message is received and processed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. Figure 2 and Figure 3 show two flow chart of charging message reporting based on the user number for Diameter routing. It can be found that the two methods are applicable to different service scenarios. When a CDMA network user calls an IMS user, the called number is used as the calling number. Query the routing table keyword. When an IMS user calls a CDMA network user, the calling number is used as the query routing table keyword. 2 is a flow chart of charging reporting of Diameter routing based on a called number when a CDMA network user calls an IMS user, including:

201: First, the MGCF network element needs to perform data configuration, and configure a mapping relationship between the IMS user number and different CGs, and save the information in the MGCF network element, for example, the 9999**** number segment user mapping CG1, 8888**** User maps CG2. 202: CDMA network user calls the user in the IMS network, through the session initiation protocol (Session

Initiation Protocol (SIP) call connection, for example, the IMS subscriber number is 99990001.

203: The MGCF network element extracts the called number 99990001 during the call, according to the data configuration performed in step 201, searches the routing table with the called number as the primary key, based on the principle of “longest matching from the right end” The result is CG1, and the local action is: RELAY; 204: The MGCF sends an ACR message to the CGI, and the message carries the called number information.

205: The CG1 receives the ACR message, and extracts the calling number and the called number from the message, respectively determining whether the number belongs to the CG. If at least one of the numbers belongs to the CG, the local processing is performed, and the called number 9990001 belongs to CG1, accepts processing of this ACR message.

206: CG1 processes the ACR message and returns an ACA message to the MGCF.

Figure 3 is a flow chart of the charging report based on the calling number for Diameter routing when the IMS user calls the CDMA network user.

301: First, the MGCF network element needs to perform data configuration, and the mapping relationship between the IMS user number and different CGs is performed, and is saved in the network element. For example, the 9999**** segment user mapping <->CGl, 8888**** segment user mapping <->CG2.

302: The user in the IMS network calls the CDMA network user to connect through the SIP call. For example, the IMS subscriber number is 9999001. 303: The MGCF network element extracts the calling number 999990001 during the calling process, and according to the data configuration performed in step 301, searches the routing table with the calling number as the primary key, based on the principle of “longest matching from the right end”, The result is CG1, and the local action is: RELAY, which sends an ACR message to CG1. 304: The MGCF sends an ACR message to the CG1, where the message carries the calling number AVP information.

305: CG1 receives the ACR message, extracts the calling number and the called number from the message, and determines whether the number belongs to the CG1 respectively. If at least one of the numbers belongs to the CG, the local processing is performed, and the calling number 999991 belongs to the CG1. , accept processing this ACR message.

306: CG1 processes the ACR message and returns an ACA message to the MGCF.

The present invention also provides a Diameter routing system, the system comprising a Media Gateway Control Function (MGCF), the MGCF being configured to: after the CDMA network user and the IP Multimedia Subsystem (IMS) user establish a call, send the charging information to In the process of the IMS network, the user number of the IMS user is used as the primary key of the Diameter message route to find the route. Wherein, when the CDMA network user calls the IMS user, the called number is used as the primary key of the Diameter message routing; when the IMS user calls the CDMA network user, the calling number is used as the primary key of the Diameter message routing. The MGCF is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway. The MGCF is configured to: when the CDMA network user calls the IMS user, extract the called number, use the called number as the primary key to search the routing table, obtain the corresponding charging gateway, and send the charging request to the charging gateway. The message, the charging request message carries the called number information. The MGCF is configured to: when the IMS user calls the CDMA network user, extract the calling number, use the calling number as the primary key to search the routing table, obtain the corresponding charging gateway, and send the charging request to the charging gateway. The message, the charging request message carries the calling number information. The system further includes a charging gateway, and the charging gateway is configured to: after receiving the charging request message, extract the called number and the calling number from the charging request message, and determine at least When one of them belongs to the charging gateway, the charging request message is received and processed. The present invention also provides a Media Gateway Control Function (MGCF) device, which is configured to: in the process of transmitting charging information to the IMS network after the CDMA network user and the IP Multimedia Subsystem (IMS) user establish a call Use the IMS user's user number as the primary key for Diameter message routing to find routes. The MGCF device is configured to: when the CDMA network user calls the IMS user, use the called number as the primary key of the Diameter message routing; when the IMS user calls the CDMA network user, the calling number is used as the primary key of the Diameter message routing. word. The MGCF device is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway; the MGCF device is configured to use the user number of the IMS user as the primary key to find the route of the Diameter message routing as follows When the CDMA network user calls the IMS user, the called number is extracted, and the called number is used as the primary key to search the routing table to obtain the corresponding charging gateway; and the MGCF device is further configured to: The gateway sends an accounting request message, where the charging request message carries the called number information. The MGCF device is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway; the MGCF device is configured to use the user number of the IMS user as the primary key to find the route of the Diameter message routing as follows When the IMS user calls the CDMA network user, the calling number is extracted, and the calling number is used as the primary key to search the routing table to obtain the corresponding charging gateway. The MGCF device is further configured to: The charging request message is sent, and the charging request message carries the calling number information.

Through the above method, the IMS does not need to send the domain name of the CG to the MGCF, and the charging message of different users is sent to the CG charging center to which it belongs. And because IMS does not need to be the domain of CG The name is sent to the MGCF to reduce the effect of message traffic. Diameter routing is performed according to the number. When network planning is performed, different CG charging centers can manage users of different numbers to facilitate network management. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial Applicability The present invention utilizes the calling number or the called number in the call as the primary key of the Diameter message routing, and does not need to set the correspondence between the user number and the CG domain name in the IMS network element, and does not require the IMS network element in the calling process. The CG domain name is obtained according to the user number and sent to the MGCF network element, which reduces message traffic. In addition, since the ACR message sent by the MGCF to the CG charging center already has the calling number and the called number, no additional overhead is required.

Claims

Claim

1. A Diameter routing method, the method comprising:

After the CDMA network user and the IP Multimedia Subsystem (IMS) user establish a call, in the process of sending the charging information to the IMS network, the user number of the IMS user is used as the primary key of the Diameter message routing to search for the route.

2. The method according to claim 1, wherein the using the user number of the IMS user as the primary key of the Diameter message routing comprises: when the CDMA network user calls the IMS user, using the called number as the primary of the Diameter message routing Keyword; When an IMS subscriber calls a CDMA network subscriber, the calling number is used as the primary key for Diameter message routing.

3. The method according to claim 2, wherein the method further comprises: a media gateway control function (MGCF) configuring and saving a mapping relationship between a user number of the IMS user and the charging gateway; when the CDMA network user calls the IMS user , using the user number of the IMS user as

The step of searching the route of the primary key of the Diameter message routing includes: the MGCF extracts the called number, uses the called number as a primary key to search the routing table, and obtains a corresponding charging gateway; and uses the user number of the IMS user. After the step of searching for the route as the primary key of the Diameter message routing, the method further includes: the MGCF sending an accounting request message to the charging gateway, where the charging request message carries the called number information.

4. The method according to claim 2, wherein the method further comprises: configuring, by the MGCF, a mapping relationship between the user number of the IMS user and the charging gateway; and when the IMS user calls the CDMA network user, using the user of the IMS user Number as The main keyword search route of the Diameter message route includes:

The MGCF extracts the calling number, uses the calling number as the primary key to search the routing table, and obtains the corresponding charging gateway. After the step of using the user number of the IMS user as the primary key of the Diameter message routing, the step of searching for the route is performed. The method further includes: the MGCF sending an accounting request message to the charging gateway, where the charging request message carries calling number information.

The method according to claim 3 or 4, the method further comprising: after receiving the charging request message, the charging gateway extracts the called number and the master from the charging request message The calling number, when determining that at least one of the charging gateways belongs to the charging gateway, receives and processes the charging request message.

6. A Diameter routing system, the system comprising a Media Gateway Control Function (MGCF), the MGCF being configured to: after the CDMA network user and the IP Multimedia Subsystem (IMS) user establish a call, send charging information to the IMS In the process of the network, the user number of the IMS user is used as the primary key of the Diameter message route to find the route.

7. The system according to claim 6, wherein the MGCF is configured to: when the CDMA network user calls the IMS user, use the called number as the primary key of the Diameter message routing; when the IMS user calls the CDMA network user , using the calling number as the primary key for Diameter message routing.

8. The system according to claim 7, wherein the MGCF is further configured to: configure and save a mapping relationship between a user number of the IMS user and the charging gateway; the MGCF is a user configured to use the IMS user as follows: The number is used as the primary key search route of the Diameter message route: when the CDMA network user calls the IMS user, the called number is extracted, and the called number is used as the primary key to search the routing table to obtain the corresponding charging gateway; The MGCF is further configured to: send an accounting request message to the charging gateway, where the charging request message carries the called number information.

The system of claim 7, wherein the MGCF is further configured to: configure and save a mapping relationship between a user number of the IMS user and the charging gateway; and the MGCF is a user configured to use the IMS user as follows: The number is used as the primary key of the Diameter message route to find the route: When the IMS user calls the CDMA network user, the calling number is extracted, and the calling number is used as the primary key to search the routing table to obtain the corresponding charging gateway;

The MGCF is further configured to: send an accounting request message to the charging gateway, where the charging request message carries calling number information.

The system of claim 8 or 9, wherein the system further comprises a charging gateway, and the charging gateway is configured to: after receiving the charging request message, from the charging request message The called number and the calling number are extracted, and when at least one of the charging gateways is determined to belong to the charging gateway, the charging request message is received and processed.

11. A media gateway control function (MGCF) device, wherein the MGCF device is configured to: after a call is established between a CDMA network user and an IP Multimedia Subsystem (IMS) user, in the process of sending charging information to the IMS network, The user number of the IMS user is used as the primary key of the Diameter message route to find the route.

12. The MGCF device according to claim 11, wherein the MGCF device is configured to: when a CDMA network user calls an IMS user, use the called number as a primary key of Diameter message routing; when the IMS user calls a CDMA network When the user is using the calling number as the primary key of the Diameter message routing.

13. The MGCF device according to claim 12, wherein The MGCF device is further configured to: configure and save a mapping relationship between the user number of the IMS user and the charging gateway; the MGCF device is configured to use the user number of the IMS user as the primary key to find the route of the Diameter message routing as follows When the CDMA network user calls the IMS user, the called number is extracted, and the called number is used as the primary key to search the routing table to obtain the corresponding charging gateway; and the MGCF device is further configured to: The gateway sends an accounting request message, where the charging request message carries the called number information.

The MGCF device according to claim 12, wherein the MGCF device is further configured to: configure and save a mapping relationship between a user number of the IMS user and the charging gateway; the MGCF device is configured to use the IMS as follows The user's user number is used as the primary key of the Diameter message routing. When the IMS user calls the CDMA network user, the calling number is extracted, and the calling number is used as the primary key to search the routing table to obtain the corresponding charging gateway. The MGCF device is further configured to: send an accounting request message to the charging gateway, where the charging request message carries calling number information.