CN101720076B - Charging method and system - Google Patents

Charging method and system Download PDF

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Publication number
CN101720076B
CN101720076B CN2009100873806A CN200910087380A CN101720076B CN 101720076 B CN101720076 B CN 101720076B CN 2009100873806 A CN2009100873806 A CN 2009100873806A CN 200910087380 A CN200910087380 A CN 200910087380A CN 101720076 B CN101720076 B CN 101720076B
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charging
radio access
access technology
technology types
aaa server
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CN101720076A (en
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朱春晖
郭文洁
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2009/073724 priority patent/WO2010145094A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1428—Invoice generation, e.g. customization, lay-out, database processing, algorithms for calculating the bill or formatting invoices as WWW pages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1485—Tariff-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a charging method and a charging system. According to the method and the system, an AAA server acquires a current radio access technology type of a user, and generates a CDR according to the acquired radio access technology type and charging information from an HA, and then transmits the CDR to a charging network element; and the charging network element identifies the current radio access technology type of the user according to the CDR, and charges by adopting different rates. Through the technical scheme of the invention, the CDR comprises the current radio access technology type of the user, so the charging network element charges by adopting the corresponding rates according to the radio access technology type to realize differentiated charging aiming at an I-WLAN and a GPRS.

Description

A kind of charging method and system
Technical field
The present invention relates to the billing technology among the mobile network, refer to the charging method and the system of the differentiation among a kind of mobile network especially.
Background technology
Mutual WLAN (I-WLAN, Interworking Wireless Local Area Network) is a wlan network with third generation partner program (3GPP, 3rd Generation Partnership Project) network interaction.I-WLAN mainly comprises wlan access network (WLAN AN; WLAN Access Network), WLAN IAD (WAG; WLAN Access Gateway), packet data gateway (PDG; Packet Date Gateway), authentication and authorization charging server (AAA Server, Authentication, Authorization and Accounting) and other support nodes.Mutual purpose be make the WLAN access technology can with the cooperation of 3GPP core-network infrastructure so that WLAN user can insert the 3GPP packet service through the WLAN access network.
GPRS (GPRS; General Packet Radio Service) access network mainly comprises 3GPP Radio Access Network (GERAN/UTRAN; GSM EDGE Radio AccessNetwork/UMTS Terrestrial Radio Access Network), Serving GPRS Support Node (SGSN; Serving GPRS Support Node), Gateway GPRS Support Node (GGSN, Gateway GPRSSupport Node) and other support nodes.
Fig. 1 is the Organization Chart of mobility solution between I-WLAN network and the 3GPP network (I-WLAN Mobility).As shown in Figure 1, charging network element wherein is used to collect the information that the user uses Internet resources, and these information are called charge information, can be the service time of data traffic and/or Internet resources.Charge information exists with the form of charging data record (CDR, Charging Data Record).Charging network element comprises CDF (Charging Date Function, charging data function) and CGF (Charging GatewayFunction, Charging Gateway Functionality) etc.
In the network architecture shown in Figure 1, PDG, GGSN can directly generate CDR and issue charging network element, include user identity among the CDR, charging identifier and radio access technology types information; And WLANAN and home agent (HA; Home Agent) need and/or issue AAA Server service time with the data traffic of self adding up; According to the actual deployment situation of AAA Server and charging network element, the processing of follow-up AAA Server has following two kinds of scenes:
Scenario A, AAA Server and CDF (Charging Date Function, charging data function) are separately; At this moment AAA is (like charging identifier the charging relevant information; The user uses the Internet resources situation, and the wireless access type among the present invention program) issue CDF, produce CDR by CDF.
Scenario B, AAA Server comprises the CDF function, and at this moment AAA goes up and can directly produce CDR.
The present invention mainly describes scenario B, in like manner can release scenario A.
For the mobile subscriber with I-WLAN and GPRS access network access capability, it need keep business continuance when between two kinds of access networks, switching.At present, the 3GPP normal structure adopts two stack mobile Internet Protocol sixth versions (DSMIPv6, Dual-Stack Mobile Internet Protocol vetsion 6) as the mobility solution that keeps this business continuance.Mobility solution based on DSMIPv6 uses the anchor point of HA as the user mobility management.
When subscriber equipment (UE) when GPRS network inserts; At first, set up packet data protocol (PDP, Packet Data Protocol) the context connection of UE to GGSN; UE starts the DSMIPv6 protocol stack afterwards; Set up a DSMIPv6 tunnel with HA and be connected, UE is connected to HA through the PDP Context of above-mentioned GPRS, the IP operation that provides through the HA access carrier;
When UE when I-WLAN inserts; At first, set up the IP secure tunnel connection (IPSec, IP Security) of UE to PDG; UE starts the DSMIPv6 protocol stack afterwards; Set up a DSMIPv6 tunnel with HA and be connected, UE is connected to HA through the IP secure tunnel of above-mentioned I-WLAN, the IP operation that provides through the HA access carrier;
When UE switched between I-WLAN and GPRS access network, the DSMIPv6 protocol stack can make the IP address of UE remain unchanged, thereby realized continuously professional.
Fig. 2 is the flow chart of the application of DSMIPv6 protocol stack in I-WLAN Mobility framework shown in Figure 1, and is as shown in Figure 2, may further comprise the steps:
Step 200:UE and access network connect, to obtain Care-of Address.
When the access network that inserts as UE was GPRS, the PDP Context of setting up in this step of setting up between UE and the GGSN that is connected to was connected;
When the access network that inserts as UE was I-WLAN, being connected to of setting up in this step set up ipsec tunnel between UE and the PDG and is connected.
The address that step 201:UE obtains HA through mode such as name server (DNS, Domain Name Server) inquiry, and set up Security Association with HA, and acquisition home address (for not shown DNS among easy Fig. 2).
Step 202～step 203:UE sends binding update messages to HA, and HA binds Care-of Address and the home address of UE, and HA returns binding acknowledgement message to UE.
Step 204: between UE and HA, set up the DSMIPv6 tunnel.Like this, send to the external data of the home address of UE, held back by HA, HA gives the data forwarding of holding back through the DSMIPv6 tunnel Care-of Address of UE.
Fig. 3 for existing UE when I-WLAN inserts, WLANAN issues the flow chart of charging network element with charge information, and is as shown in Figure 3, may further comprise the steps:
Step 300:UE inserts the I-WLAN network, after UE is established to the wireless connections of WLAN AN, initiates to set up the ipsec tunnel request to PDG;
Step 301: receive that at PDG when setting up the ipsec tunnel request, PDG and aaa server carry subscriber identity information and charging identifier (ChargingID) alternately so that the user is carried out authentication in authentication request.Wherein, Subscriber identity information can be travelling carriage integrated services digital network number (MSISDN; Mobile Station Integrated Service Digital Network number) and/or international mobile subscriber identity (IMSI, International Mobile Subscriber Identity).
Step 302:AAA server carries out authentication to the user, passes through message to the PDG return authentication behind the authentication success; Simultaneously, aaa server respective user identity is preserved charging identifier.
Step 303: between UE and PDG, accomplish the foundation of ipsec tunnel.
Step 304:WLAN AN as data flow and/or service time etc. issuing aaa server, carries subscriber identity information such as MSISDN and/or IMSI with the charge information of self adding up simultaneously.
Step 305:AAA server is according to subscriber identity information, finds the corresponding Charging ID that preserves, and Charging ID is inserted in the charge information that WLAN AN sends, and sends to charging network element after generating CDR.
At present; When using I-WLAN Mobility framework shown in Figure 1; Use the DSMIPv6 agreement to set up the DSMIPv6 tunnel between UE and the HA and connect, the IP operation that UE provides through the HA access carrier, at this moment; HA can provide the charge information that comprises the user network operating position, and issues charging network element through aaa server.Aaa server is collected the charge information of HA, and still, aaa server is not collected the charge information of PDG or GGSN.
Because charging network element is the access technology type (RAT Type) current according to the user: GPRS (comprising GERAN and UTRAN) or I-WLAN; Adopt different rates to charge; Therefore, in the charge information that charging network element receives, need comprise the current radio access technology types of user.
But; Present DSMIPv6 tunnel connects does not provide the user current RAT Type information; So offering in the charge information of aaa server, HA do not comprise RAT Type, therefore, and in the network based on the mobility solution of DSMIPv6 at present; The information that does not have user's current wireless access technology type among the CDR that aaa server generates; That is to say that charging network element can't combine charge information and corresponding charging rate to charge, thereby can't realize the differentiated charging to I-WLAN and GPRS.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of charging method, can carry out differentiated charging to I-WLAN and GPRS.
Another object of the present invention is to provide a kind of charge system, can carry out differentiated charging to I-WLAN and GPRS.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of charging method, this method may further comprise the steps:
The authentication and authorization charging aaa server obtains the current radio access technology types of user and from the charge information of home agent HA, and said radio access technology types and said charge information are sent to charging network element charges.
Said aaa server sends to charging network element with said radio access technology types and said charge information: said aaa server is according to the radio access technology types and the charge information of said acquisition; Generate charging data record CDR, the CDR that will include radio access technology types and charge information sends to charging network element.
Said charging network element charges and comprises:
Said charging network element identifies the current radio access technology types of user according to said CDR, and adopts corresponding rate to charge.
When the WLAN I-WLAN of the initial access interaction of subscriber equipment, said aaa server obtains the current radio access technology types of user and comprises:
In verification process, the packet data gateway PDG radio access technology types that the user is current sends to aaa server.
The current radio access technology types of said user is carried in the authentication request.
When subscriber equipment initially inserted I-WLAN, said aaa server obtained the current radio access technology types of user and comprises:
The wlan access network WLAN AN radio access technology types that the user is current sends to aaa server.
When subscriber equipment initially inserted general packet radio service (GPRS) network, said aaa server obtained the current radio access technology types of user and comprises:
Said aaa server judges that according to the radio access technology types of self not preserving said subscriber equipment the current radio access technology types of user is GPRS.
When subscriber equipment switched between I-WLAN and GPRS, said aaa server obtained the current radio access technology types of user and comprises:
After said aaa server was received the switching notice from HA, radio access technology types that will be different with the current radio access technology types of user was as the new radio access technology types of said subscriber equipment.
Carry subscriber identity information in the said switching notice and switch indication.
This method also comprises: said aaa server respective user identity information, preserve the current radio access technology types of corresponding charging identifier and user.
Said generation CDR specifically comprises: said aaa server basis is from the subscriber identity information in the charge information of HA; Find self preserve to radio access technology types and charging identifier that should the user, combine from other information generations station message recording CDR in the charge information of said HA;
When subscriber equipment when I-WLAN inserts, said charging identifier is from PDG; When subscriber equipment when GPRS network inserts, generate said charging identifier by AAA Server.
Saidly comprise data traffic and/or use duration from other information in the charge information of HA.
When subscriber equipment when I-WLAN inserts, this method also comprises:
Said charging network element is according to the charging identifier among the CDR that receives, and the CDR that related PDG provides, and the CDR that generates of the charge information that provides according to HA of aaa server form unified charging result according to preset charging regulation.
When subscriber equipment when GPRS network inserts, this method also comprises:
Said charging network element is according to subscriber identity information and radio access technology types, and the CDR that associated gateway GPRS Support Node GGSN provides, and the CDR that generates of the charge information that provides according to HA of aaa server form unified charging result according to preset charging regulation.
A kind of charge system comprises authentication and authorization charging aaa server, home agent HA, charging network element at least, wherein,
Said aaa server is used to obtain the current radio access technology types of user and from the charge information of said HA, and sends to charging network element;
Said charging network element, be used to receive from aaa server and with said radio access technology types and said charge information, and charge.
Said radio access technology types and said charge information are included among the CDR;
Said charging network element also is used for identifying the current radio access technology types of user, and adopting corresponding rate to charge according to the CDR that receives.
This system also comprises packet data gateway PDG, and when being used for the WLAN I-WLAN when the initial access interaction of subscriber equipment, the radio access technology types that the user is current sends to said aaa server.
This system also comprises wlan access network WLAN AN, is used for when subscriber equipment initially inserts I-WLAN, and the radio access technology types that the user is current sends to said aaa server.
When subscriber equipment initially inserted general packet radio service (GPRS) network, said aaa server also was used for, and according to the radio access technology types of self not preserving said subscriber equipment, judged that the current radio access technology types of user is GPRS.
When subscriber equipment switches between I-WLAN and GPRS; Said aaa server also is used for; Receive the switching notice from HA, radio access technology types that will be different with the current radio access technology types of user is as the new radio access technology types of said subscriber equipment.
Said aaa server also is used for, and the respective user identity information is preserved the current radio access technology types of corresponding charging identifier and user.
Can find out from the technical scheme that the invention described above provides; The present invention program comprises that aaa server obtains the current radio access technology types of user; And generate CDR, and send to charging network element according to the radio access technology types that obtains with from the charge information of HA; Charging network element is discerned the current radio access technology types of user, and is adopted corresponding rate to charge according to CDR.Visible through the present invention program; Because include the current radio access technology types of user among the CDR, therefore, charging network element is according to said radio access technology types; Adopt corresponding charging rate to charge, realized differentiated charging to I-WLAN and GPRS.
Description of drawings
Fig. 1 is the composition configuration diagram of mobility solution between I-WLAN network and the 3GPP network;
Fig. 2 is the flow chart of the application of DSMIPv6 protocol stack in I-WLAN Mobility framework shown in Figure 1;
Fig. 3 for existing UE when I-WLAN inserts, WLAN AN issues charge information the flow chart of charging network element;
The flow chart of the method that Fig. 4 realizes for the present invention chargeing;
The flow chart of first embodiment that Fig. 5 realizes for the present invention chargeing;
The flow chart of second embodiment that Fig. 6 realizes for the present invention chargeing;
The flow chart of the 3rd embodiment that Fig. 7 realizes for the present invention chargeing;
The flow chart of the 4th embodiment that Fig. 8 realizes for the present invention chargeing.
Embodiment
The flow chart of the method that Fig. 4 realizes for the present invention chargeing, as shown in Figure 4, the inventive method comprises:
Step 400:AAA server obtains the current radio access technology types of user.
When the UE initial access network; If access network is I-WLAN; In verification process, the PDG radio access technology types (being I-WLAN) that the user is current sends to aaa server, perhaps obtains the current radio access technology types of user (being I-WLAN) through WLAN AN; If access network is a GPRS network; Aaa server directly obtains charge information from HA, and at this moment, aaa server is according to the radio access technology types of self not preserving UE; Judge UE and insert from GPRS, promptly the current radio access technology types of user is GPRS (comprising GERAN and UTRAN).
When UE switches between I-WLAN and GPRS; Switch to new network and upgrade binding relationship among the HA when being the binding relationship of new Care-of Address and home address; HA judges that switching has taken place UE, then sends the user to aaa server the switching notice of switching has taken place; After receiving switching notice from HA; Aaa server can be judged the user and switch and inserted the another one access network; Because UE can only switch between GPRS and I-WLAN, thus aaa server only need will be different with the current radio access technology types of user radio access technology types get final product as the new radio access technology types of said subscriber equipment.Such as, if the current radio access technology types of user is I-WLAN, then receive switching notice from HA after, aaa server is judged UE and is switched to GPRS, that is to say that user's radio access technology types changes to GPRS; If the current radio access technology types of user is GPRS, then receive switching notice from HA after, aaa server is judged UE and is switched to I-WLAN, that is to say that user's radio access technology types changes to I-WLAN.
In aaa server, the respective user identity information is preserved the current radio access technology types of corresponding charging identifier and user.
Step 401:AAA server generates CDR according to the radio access technology types that obtains with from the charge information of HA, and sends to charging network element.
This step specifically comprises: the aaa server basis is from the subscriber identity information in the charge information of HA; Find self preserve to radio access technology types and charging identifier that should the user; Other charge informations sent in conjunction with HA such as data flow and/or use duration etc.; Generate station message recording CDR, and send to charging network element.Wherein, when subscriber equipment when I-WLAN inserts, said charging identifier is from PDG; When subscriber equipment when GPRS network inserts, generate said charging identifier by AAA Server.
Need to prove; How to generate CDR and belong to those skilled in the art's conventional techniques means; Its concrete implementation method also is not used in qualification protection scope of the present invention; What this step was stressed is, in the network based on the mobility solution of DSMIPv6, the CDR that aaa server generates has considered the radio access technology types that the user is current.
Step 402: charging network element identifies the current radio access technology types of user, and adopts corresponding rate to charge according to the CDR that obtains.
Owing to include the current radio access technology types of user among the CDR; Therefore; Charging network element adopts the charging rate corresponding with radio access technology types to charge according to said radio access technology types, has realized the differentiated charging to I-WLAN and GPRS.
Further; When subscriber equipment when I-WLAN inserts, charging network element can also be further according to the charging identifier among the CDR that receives, the CDR that related PDG provides; And the CDR that generates of the charge information that provides by HA received of aaa server, form unified charging result according to charging regulation; When subscriber equipment when GPRS network inserts; Charging network element is according to subscriber identity information and radio access technology types; The CDR that associated gateway GPRS Support Node GGSN provides; And the CDR that generates of the charge information that provides according to HA of aaa server, form unified charging result according to preset charging regulation.Charging regulation is to be provided with in advance in the charging network element, does not belong to protection range of the present invention, and what stress here is; Charging network element is when chargeing; Be according to said radio access technology types, adopt corresponding charging rate to charge, realized differentiated charging to I-WLAN and GPRS.
Below in conjunction with several embodiment the inventive method is described in detail.
Charging method when the flow chart of first embodiment that Fig. 5 realizes for the present invention chargeing, first embodiment initially insert I-WLAN for UE, as shown in Figure 5, comprising:
Step 500:UE inserts the I-WLAN network, after UE is established to the wireless connections of WLAN AN, initiates to set up the ipsec tunnel request to PDG.
Step 501: receive when setting up the ipsec tunnel request at PDG; PDG and aaa server are alternately to carry out authentication to the user; Except carrying subscriber identity information and Charging ID, also carrying the current radio access technology types of user is I-WLAN in authentication request.Wherein, subscriber identity information can be MSISDN and/or IMSI.
Aaa server obtains the current radio access technology types of UE from PDG.
Step 502:AAA server carries out authentication to the user, passes through message to the PDG return authentication behind the authentication success; Simultaneously, aaa server respective user identity is preserved charging identifier and radio access technology types.
Step 503: between UE and PDG, accomplish the foundation of ipsec tunnel, PDG is that UE distribution Access Network address is the Care-of Address among the DSMIPv6.
Set up the DSMIPv6 tunnel between step 504:UE and the HA.Roughly comprise: UE initiates the Security Association between foundation and the HA, and HA is that UE distributes home address, and UE initiates Binding Update to HA, in HA, sets up the Care-of Address of UE and the binding relationship of home address, accomplishes the foundation in DSMIPv6 tunnel between UE and the HA.
In this step, HA is initial promptly not switching of setting up according to this binding relationship, therefore can not notify aaa server.
Step 505: when the charge information that begins to have UE on the HA (like the data flow and/or use duration), HA sends above-mentioned charge information to aaa server, also comprises subscriber identity information (such as MSISDN and/or IMSI) simultaneously.
Here; It should be noted that; HA send to aaa server subscriber identity information should to send to the subscriber identity information of aaa server consistent with PDG; Specifically can be: the subscriber identity information in step 501 and the step 505 comprises MSISDN and IMSI simultaneously, perhaps is MSISDN simultaneously, perhaps is IMSI simultaneously.
Step 506: combining wireless access technology type generates CDR; Specifically comprise: the aaa server basis is from the subscriber identity information in the charge information of HA; Find self preserve to radio access technology types and charging identifier that should the user; And other charge informations sent of HA such as data flow and/or use duration etc., generate station message recording CDR.
Step 507:AAA server sends to charging network element with the CDR that generates, and charging network element is discerned the current radio access technology types of user, and adopted different rates to charge according to CDR.Among first embodiment, charging network element employing radio access technology types is that the rate of I-WLAN is chargeed.
Further; In this step; Charging network element can also be further according to the user identity among the CDR that receives, wireless access type I-WLAN and/or charging identifier, the CDR that related PDG provides; And the CDR that generates of the charge information that provides according to HA of aaa server, form unified charging result according to charging regulation.Charging regulation is to be provided with in advance in the charging network element, does not belong to protection range of the present invention, and what stress here is; Charging network element is when chargeing; Be according to said radio access technology types, adopt corresponding charging rate to charge, realized differentiated charging to I-WLAN and GPRS.
Charging method when the flow chart of second embodiment that Fig. 6 realizes for the present invention chargeing, second embodiment initially insert GPRS network for UE, as shown in Figure 6, comprising:
Step 600:UE initially inserts GPRS network, set up with GGSN between PDP Context is connected, GGSN is UE distribution Access Network address, this Access Network address is the Care-of Address that UE uses in the DSMIPv6 agreement.
Set up the DSMIPv6 tunnel between step 601:UE and the HA.Roughly comprise: set up Security Association between UE and the HA, and obtain home address, UE sends binding update messages to HA, and HA binds Care-of Address and the home address of UE, and returns binding acknowledgement message to UE; Between UE and HA, set up the DSMIPv6 tunnel.
In this step, HA is initial promptly not switching of setting up according to this binding relationship, therefore can not notify aaa server.
Step 602:HA sends to aaa server with charge information (like data flow and/or use duration) and subscriber identity information (like MSISDN and/or IMSI); Aaa server is according to self not preserving the corresponding radio access technology types of this user identity; Judge that the active user inserts from GPRS, the current radio access technology types of user is set to GPRS.
Step 603:AAA server is according to the charge information from HA, and combining wireless access technology type GPRS generates CDR.
Step 604:AAA server sends to charging network element with the CDR that generates, and charging network element is discerned the current radio access technology types of user, and adopted different rates to charge according to CDR.Among first embodiment, charging network element employing radio access technology types is that the rate of GPRS is chargeed.
Further; Charging network element is through radio access technology types GPRS and subscriber identity information; The CDR that can obtain from GGSN, and the CDR that the charge information that provides according to HA of aaa server generates associates is that GPRS this time of this user inserts and forms unified charging result.
The flow chart of the 3rd embodiment that Fig. 7 realizes for the present invention chargeing, the 3rd embodiment has inserted I-WLAN (or GPRS) network for UE, and the charging method of decision when GPRS (or I-WLAN) network switches is as shown in Figure 7, comprising:
Step 700: suppose that UE has inserted I-WLAN (or GPRS) network, hypothesis is owing to reasons such as wireless signals in the present embodiment, and decision is switched to GPRS (or I-WLAN) network.
Step 701:UE initiate to set up with GGSN between PDP Context is connected, GGSN is the new Access Network address of UE distribution; Perhaps, UE initiate to set up with PDG between ipsec tunnel is connected, PDG is the new Access Network address of UE distribution.
Above-mentioned Access Network address is UE new Care-of Address under the DSMIPv6 agreement.
Step 702:UE initiates the DSMIPv6 tunnel between foundation and the HA, and wherein UE carries new Care-of Address and issues HA in binding update messages, and HA binds the home address of UE with this new Care-of Address.
Care-of Address in new Care-of Address that carries in step 703～step 704:HA comparison binding update messages and this user's who self has preserved the binding relationship; Find when inequality; Judge that the access network switching has taken place UE; Send switching notice to aaa server, in switching notice, carry and switch indication and subscriber identity information; After aaa server is received switching notice,, this user's existing radio access technology types I-WLAN (or GPRS) is changed to GPRS (or I-WLAN) according to subscriber identity information.
It should be noted that when the radio access technology types after the renewal is GPRS aaa server is also further deleted the charging identifier of preserving from PDG.Further, can generate new charging identifier.
Step 705: charge information (like data flow and/or use duration) and subscriber identity information (like MSISDN and/or IMSI) are sent to aaa server.
User identity in the charge information that step 706:AAA server is sent according to HA; Find this user's who self preserves radio access technology types GPRS (or IWLAN) and charging identifier, other parts in the charge information that combining wireless access technology type and HA send generate CDR.
Step 707:AAA server sends to charging network element with the CDR that generates; Charging network element is according to the radio access technology types in the charge information of receiving; The current radio access technology types of identification user is GPRS (or IWLAN), takes corresponding rate to charge.
When wireless radio access technology types is GPRS; Charging network element can also be according to user identity and radio access technology types GPRS; Related CDR from GGSN; And, be this user's the unified charging result of the access formation of GPRS this time from the CDR that the charge information that is provided by HA that aaa server is received generates;
When radio access technology types is I-WLAN; Charging network element can be according to user identity; Wireless access type I-WLAN and/or charging identifier; Related CDR from PDG, and the CDR that generates of the charge information that provides according to HA of aaa server are that IWLAN this time of this user inserts and forms unified charging result.
When the flow chart of the 4th embodiment that Fig. 8 realizes for the present invention chargeing, the 4th embodiment initially insert I-WLAN for UE, the charging method of related a plurality of charge informations, as shown in Figure 8, comprising:
Step 800:UE initially inserts I-WLAN, after UE is established to the wireless connections of WLAN AN, sends the ipsec tunnel request of setting up to PDG.
Step 801: between UE and PDG, set up ipsec tunnel.PDG can be with issuing aaa server from this time inserting the Charging ID that generates as this user, and aaa server is preserved this Charging ID and subscriber identity information.
Step 802:WLAN AN issues aaa server with this user identity (can be to comprise MSISDN and IMSI simultaneously), radio access technology types I-WLAN and charge information (like data flow and/or use duration).
Aaa server obtains the current radio access technology types of UE from WLAN AN.
Step 803:AAA server utilizes to find corresponding radio access technology types, charge information according to the subscriber identity information of receiving, and the charging identifier of preserving in the step 801, generates CDR.
Step 804:AAA server sends to charging network element with the CDR that generates, and it is I-WLAN that the while aaa server is provided with the current wireless access type of user.
The concrete realization and the step 504～step 507 of step 805～step 808 are in full accord, repeat no more here.
In sum; Adopt charging method of the present invention; The CDR that aaa server generates has considered the radio access technology types that the user is current; Guaranteed that charging network element can adopt corresponding charging rate to charge according to the current radio access technology types of CDR identification user that obtains, and has realized the differentiated charging to I-WLAN and GPRS.
Further, charging method of the present invention can also associate a plurality of charge informations of user, to form unified charge information.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (14)

1. a charging method is characterized in that, this method may further comprise the steps:
When the WLAN I-WLAN of the initial access interaction of subscriber equipment, packet data gateway PDG or the wlan access network WLAN AN radio access technology types that the user is current send to the authentication and authorization charging aaa server;
When subscriber equipment initially inserted general packet radio service (GPRS) network, said aaa server judged that according to the radio access technology types of self not preserving said subscriber equipment the current radio access technology types of user is GPRS;
When subscriber equipment switches between I-WLAN and GPRS; After said aaa server was received the switching notice from home agent HA, radio access technology types that will be different with the current radio access technology types of user was as the new radio access technology types of said subscriber equipment;
Said aaa server obtains the charge information from HA, and said radio access technology types and said charge information are sent to the charging network element charging.
2. method according to claim 1; It is characterized in that; Said aaa server sends to charging network element with said radio access technology types and said charge information: said aaa server is according to said radio access technology types and charge information; Generate charging data record CDR, the CDR that will include radio access technology types and charge information sends to charging network element.
3. method according to claim 2 is characterized in that, said charging network element charges and comprises:
Said charging network element identifies the current radio access technology types of user according to said CDR, and adopts corresponding rate to charge.
4. according to claim 1,2 or 3 described charging methods, it is characterized in that when the WLAN I-WLAN of the initial access interaction of subscriber equipment, the said PDG radio access technology types that the user is current sends to aaa server and comprises:
In verification process, the PDG radio access technology types that the user is current sends to aaa server.
5. charging method according to claim 4 is characterized in that, the current radio access technology types of said user is carried in the authentication request.
6. charging method according to claim 1 is characterized in that, carries subscriber identity information in the said switching notice and switches indication.
7. according to claim 2 or 3 described charging methods, it is characterized in that this method also comprises: said aaa server respective user identity information, preserve the current radio access technology types of corresponding charging identifier and user.
8. charging method according to claim 7; It is characterized in that; Said generation CDR specifically comprises: said aaa server basis is from the subscriber identity information in the charge information of HA; Find self preserve to radio access technology types and charging identifier that should the user, combine from other information generations station message recording CDR in the charge information of said HA;
When subscriber equipment when I-WLAN inserts, said charging identifier is from PDG; When subscriber equipment when GPRS network inserts, generate said charging identifier by AAA Server.
9. charging method according to claim 8 is characterized in that, saidly comprises data traffic and/or uses duration from other information in the charge information of HA.
10. according to claim 1,2 or 3 described charging methods, it is characterized in that, when subscriber equipment when I-WLAN inserts, this method also comprises:
Said charging network element is according to the charging identifier among the CDR that receives, and the CDR that related PDG provides, and the CDR that generates of the charge information that provides according to HA of aaa server form unified charging result according to preset charging regulation.
11. according to claim 1,2 or 3 described charging methods, it is characterized in that, when subscriber equipment when GPRS network inserts, this method also comprises:
Said charging network element is according to subscriber identity information and radio access technology types, and the CDR that associated gateway GPRS Support Node GGSN provides, and the CDR that generates of the charge information that provides according to HA of aaa server form unified charging result according to preset charging regulation.
12. a charge system is characterized in that, comprises packet data gateway PDG, wlan access network WLAN AN, authentication and authorization charging aaa server, home agent HA, charging network element at least, wherein,
Said aaa server is used for when subscriber equipment initially inserts I-WLAN, receives the current radio access technology types of user that PDG or WLAN AN send; When subscriber equipment initially inserts general packet radio service (GPRS) network,, judge that the current radio access technology types of user is GPRS according to the radio access technology types of self not preserving said subscriber equipment; When subscriber equipment switches between I-WLAN and GPRS, receive switching notice from HA after, radio access technology types that will be different with the current radio access technology types of user is as the new radio access technology types of said subscriber equipment; Also be used to obtain charge information, and send to charging network element from said HA;
Said charging network element is used to receive said radio access technology types and the said charge information from aaa server, and charges.
13. charge system according to claim 12 is characterized in that, said radio access technology types and said charge information are included among the CDR;
Said charging network element also is used for identifying the current radio access technology types of user, and adopting corresponding rate to charge according to the CDR that receives.
14. according to claim 12 or 13 described charge systems, it is characterized in that said aaa server also is used for, the respective user identity information is preserved the current radio access technology types of corresponding charging identifier and user.
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