CN1980250B - Network Protocol Multimedia Subsystem and Method for Obtaining Access Point Information - Google Patents

Abstract

The present invention relates to a network protocol multimedia subsystem, including a user information management module, a call/session control module and an access network; wherein, the access network is connected to an IP address allocation module, and the call/session control function module and A user access point information verification module is connected between the access networks. The present invention also relates to a method for the network protocol multimedia subsystem to obtain access point information, including the steps: after the network protocol multimedia subsystem initiates a bottom layer connection establishment request from the user terminal, the user access point information verification module checks the information reported by the user terminal Check whether the IP address in the session initial information conforms to the preset IP address allocation rules, if the check is passed, the network service will be provided for the user terminal; if the check fails, the network service will not be provided, and this The event is logged, ending the session. The invention ensures that the terminal access point information obtained by the network protocol multimedia subsystem is true.

Description

Network Protocol Multimedia Subsystem and Method for Obtaining Access Point Information

technical field

The present invention relates to an Internet Protocol Multimedia Subsystem (IMS for short) and a method for obtaining access point information, in particular to an IMS system capable of obtaining real information of a terminal access point and a method for obtaining real information of an access point method. the

Background technique

With the gradual arrival of the 3G era, users have higher expectations for mobile communications. Users not only require stable voice communication, but also require the ability to communicate in multiple ways such as video and data. Aiming at these demands, combined with the existing technical conditions, the 3rd Generation Partnership Project (3GPP), which belongs to the leading 3G technical specification organization, formulated the IMS technical standard. It separates control and application, and is independent of network access methods and terminal equipment types; it focuses on promoting service innovation, enabling operators to quickly and efficiently deploy various forms of multimedia services. the

The current IMS system includes a user information management module, a call/session control function module and an access network, as shown in FIG. 1 . The user information management module is generally a Home Subscriber Server (HSS for short), which is responsible for storing user-related information, including the information of the call/session control function module currently providing services for the user; the call/session control function module (Call Session Control Function, referred to as CSCF) is generally a proxy call/session control function (Proxy-Call Session Control Function, referred to as P-CSCF), negotiation call session control function (Interrogating-Call Session Control Function, referred to as I-CSCF), service call session control Function (Serving-Call Session Control Function, referred to as S-CSCF), responsible for storing the access point information of the user terminal, providing the user with call/session control functions, and providing billing information for the call/session. the

A user terminal (User Equipment, referred to as UE) accesses the connectivity access network through the access point, and the connectivity access network is connected to the CSCF module of the IMS system. When the access network type supports that the user terminal in the access network can obtain the coded information of the access point, according to the requirements specified by the network operator, the terminal uploads the information to the call/session control function module through the connectivity access network Among them, it has the coded information of the access point, that is, the call/session control function module of the IMS network obtains the current location of the terminal through the P-Access-Netwrok-Info field in the Session Initiation Protocol (SIP) information reported by the terminal. access point information. The access point information refers to the type of access network where the terminal is currently located and its access point code information, such as GPRS or 3G PS domain network and the CELL-ID information of the base station therein, WLAN and the SSID information of the AP therein. the

However, the problem existing in the existing systems and methods is that the IMS system cannot guarantee the authenticity of the terminal access point information acquired by the call/session control function module. That is to say, if the terminal fills the access point information in the P-Access-Netwrok-Info field of the SIP information as false information, the current IMS network does not have a verification mechanism to detect such false information . In this way, once the user terminal access point information obtained by the network does not match the actual location of the user terminal, the following problems will arise:

1. The network cannot know the real location of the user, and cannot use the location information to carry out a series of business applications;

2. In some areas (such as offices) where communication tariffs are discounted, the terminal may intentionally tamper with access point information to obtain tariff discounts that it should not enjoy;

3. The terminal incorrectly fills in the access point information, resulting in unnecessary tariff loss, or the network cannot find the terminal and cannot provide services to users. the

Contents of the invention

The purpose of the present invention is to provide a network protocol multimedia subsystem and a method for obtaining access point information, so as to ensure the authenticity of the terminal access point information obtained by the network protocol multimedia subsystem, and the terminal cannot intentionally tamper with the access point information. And even if the terminal incorrectly fills in the access point information, the network can still find the terminal to provide services for the user.

To achieve the above object, the present invention provides a network protocol multimedia subsystem, including a user information management module, a call/session control module and an access network, and the access network is connected to an IP address allocation module, and the IP The address assignment module is used to assign an IP address to the terminal; a user access point information verification module is connected between the call/session control module and the access network, and the user access point information verification module is obtained from The IP address allocation module obtains the IP address allocation rules, and verifies the IP address of the user terminal according to the access network type and the IP address allocation rules;

The network protocol multimedia subsystem fills the access point information into the charging information provided for the call/session, and then performs partition charging or time-related partition charging according to the access point information in the charging information. fee. the

The present invention also provides a method for obtaining access point information, comprising the following steps:

Step 11: After the user terminal initiates the establishment of the underlying connection request, the network protocol multimedia subsystem assigns an IP address to the user terminal according to a preset IP address allocation rule; the IP address allocation rule is based on the access network type and network topology to define;

Step 12: The user access point information verification module obtains the IP address assignment rule from the IP address assignment module, and judges whether the IP address in the session initiation message reported by the user terminal conforms to the preset IP address assignment rule, and if so , then provide network services for the user terminal; if not, do not provide network services, record this event, and end the session;

Wherein, after the step 2, it also includes: the network protocol multimedia subsystem fills the access point information into the charging information provided for the call/session, and then performs partition calculation according to the access point information in the charging information. fee or time-related partition billing. the

In the above solution, the step 2 further includes sending a message containing content of refusing to provide the service to the user terminal. the

Through the above technical solution, it is ensured that the information of the current access point obtained by the IP multimedia subsystem is true, the terminal cannot intentionally tamper with the access point information, and even if the terminal fills in the access point information incorrectly, the network can still find the terminal as the user Provide services. the

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. the

Description of drawings

FIG. 1 is a network structure diagram of an existing network protocol multimedia subsystem. the

Fig. 2 is a network structure diagram of the network protocol multimedia subsystem of the present invention. the

Fig. 3 is a flow chart of an embodiment of a method for obtaining access point information in the present invention. the

Detailed ways

The present invention takes the Universal Mobile Telecommunication System (UMTS for short) in the access network type that supports the user terminal in the access network to obtain the coded information of the access point as the implementation environment, and can also be used in this access network type other network as the implementation environment. the

Fig. 2 is a network structural diagram of the IP multimedia subsystem of the present invention, including a user information management module, a call/session control module and an access network, and the access network is connected with an IP address assignment module for assigning IP addresses to user terminals IP address, that is, responsible for assigning IP addresses to terminals according to the rules set by the operator; a user access point information verification module is connected between the call/session control function module and the access network, and the user access The point information module verifies the IP address reported by the user terminal through the access network according to the access network type and IP address allocation rules, thus providing an effective platform for obtaining the real information of the access point. the

Fig. 3 is the flowchart of the method for obtaining access point information by the network protocol multimedia subsystem of the present invention, specifically comprising the following steps:

Step 101: After the user terminal initiates a bottom layer connection establishment request, that is, a PDP context establishment request, the network protocol multimedia subsystem assigns an IP address to the user terminal according to the preset IP address allocation rules defined according to the access network type and network topology , the allocation rule is defined by the IP address allocation module of the network protocol multimedia subsystem according to the access network type and network topology after the user terminal accesses the access network, and notifies the user access point information verification module of the allocation rule ;

Step 102: the user access point information verification module waits for the user terminal to report the IP address through the access point information in the session initial information P-Access-Netwrok-Info field, and after obtaining the IP address reported by the session initial message, Judging whether the IP address of the user terminal complies with the preset IP address allocation rules, if so, providing network services for the user terminal; if not, sending a message containing the content of refusing to provide services to the user terminal, rejecting Provide network services, record this event, and then end the session; or directly end the session after recording this event. the

The above embodiments ensure that the network protocol multimedia subsystem can obtain real access point information by verifying the access point information of the user terminal, and the terminal cannot intentionally tamper with the access point information, and even if the terminal incorrectly fills in the access point information, The network can also find terminals to provide services for users. the

In addition, after obtaining the access point information, the access point information can also be filled into the billing information provided for the call/session, and then the camping system of the network protocol multimedia subsystem can access Point information can be used for partition billing or time-related partition billing. the

After obtaining the access point information, the call/session control module can perform routing connection according to the access point information of these terminals and the pre-configured routing rules. Specifically, it includes the following three applications. the

When the user dials an emergency call, the execution steps are as follows: After the network protocol multimedia subsystem receives the emergency call request of the user terminal, it queries the information of the user access point, and connects the emergency call of the user terminal to the nearest emergency call platform to improve the emergency call. The response time of the calling platform. the

Users can pre-set their own call/session priority connection strategy through the customer service system. For example, if you are in a certain place, you will preferentially connect the call/session to one of your own terminals (generally a non-handheld terminal or a terminal F without automatic roaming capability), and the network expansion operator will set the place required by the user. The corresponding relationship between the location and the access point information of several access network types. When there is a call/session going to the user, according to the current access point of the user's mobile terminal, the call/session control function module first checks whether the user is on the access point corresponding to the declared place, and if so, set it by the user According to the policy, the call/session is connected to the user's terminal F first. When the terminal cannot be connected, the call/session control function module then connects the call/session to the user's mobile terminal. The specific steps include: after the network protocol multimedia subsystem receives a call request from a user to call another user, it queries the multi-terminal routing and connection rules defined by the called user, and combines the information of the user terminal access point to proceed according to the defined routing rules. continue. the

When two users are talking, the system automatically finds the nearest terminal for connection according to the access point information of the calling party and the called party, saving routing time and cost. Concrete steps include: after the network protocol multimedia subsystem receives a call request from a user to call another user, it queries the access point information of the calling terminal and the multiple access point information of the called terminal, and then, the call control module compares the two The access point information of each user is routed to the called terminal according to the nearest access point. the

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be The scheme shall be modified or equivalently replaced without departing from the spirit and scope of the technical scheme of the present invention. the

Claims (6)

1. a network protocol multi-media sub-system comprises subscriber information management module, call/session control module and Access Network; It is characterized in that: said Access Network is connected with the IP address assignment module, and said IP address assignment module is used for to user terminal distributing IP address; Be connected with user access point information checking module between said call/session control module and the said Access Network; Said user access point information checking module secondary IP address distribution module is obtained the IP address assignment rule, according to access network type and IP address assignment rule verification is carried out in the IP address of said user terminal;

Said network protocol multi-media sub-system also is used for being filled into the charge information that provides for call/session to access-in point information, then according to the access-in point information in the said charge information do zone registration or with the zone registration of time correlation.

2. method of obtaining access-in point information is characterized in that comprising:

Step 1. network protocol multi-media sub-system is user terminal distributing IP address by pre-set IP address assignment rule after user terminal initiates to set up the bottom connection requests; Said IP address assignment rule defines according to access network type and network topology structure;

Step 2. user access point information checking module secondary IP address distribution module is obtained the IP address assignment rule; Judge whether the IP address in the session initiation message of said user terminal to send up meets said predefined IP address assignment rule; If then provide services on the Internet for said user terminal; If not, then do not provide services on the Internet, and present event is carried out record, end session;

Wherein, Also comprise after the said step 2: network protocol multi-media sub-system is filled into access-in point information in the charge information that provides for call/session, then according to the access-in point information in the said charge information do zone registration or with the zone registration of time correlation.

3. method according to claim 2 is characterized in that also further comprising in the said step 2 to said user terminal transmission including the message that refusal provides service content.

4. according to claim 2 or 3 described methods; It is characterized in that also comprising after the said step 2: after network protocol multi-media sub-system is received the subscriber terminal emergently call request; The inquiring user access-in point information of terminal is linked into nearest urgent call platform with said subscriber terminal emergently calling.

5. according to claim 2 or 3 described methods; It is characterized in that also comprising after the said step 2: after network protocol multi-media sub-system is received call request; Inquire about the multiple terminals route connection rules of terminal called definition, and continue according to the user terminal access-in point information.

6. according to claim 2 or 3 described methods; It is characterized in that also comprising after the said step 2: after network protocol multi-media sub-system is received call request; A plurality of access-in point informations of the access-in point information at inquiring calling terminal and terminal called; And further contrast the access-in point information of calling terminal and terminal called, the calling of calling terminal is routed to nearest terminal called access point.

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