CN1464662A

CN1464662A - Mobile phone user authentication charging method supporting grouped data prepayment characteristic

Info

Publication number: CN1464662A
Application number: CN 02122328
Authority: CN
Inventors: 张�杰; 李益民; 赵晓东; 卢选民
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2002-06-06
Filing date: 2002-06-06
Publication date: 2003-12-31
Anticipated expiration: 2022-06-06
Also published as: CN100345411C

Abstract

The present invention discloses a mobile user authentication charging method supporting grouped data prepaying property characterized by that, the charging request responding message which AAA sending to PDSN contains dialogue activating time length sustainable information. Accordingly, the PDSN contains dialogue activating trigger and charge cycle trigger which can proceed parameter resetting based on the information that AAA has received. When the trigger condition is met, the corresponding intermediate charging request information is triggered and submitted to AAA. AAA recounts dialogue activating sustainable time length after receiving any intermediate charging request information, and sends charge request responding message to PDSN. This enables the PDSN make sectional fees application to AAA, overcoming the limitation of one-time fee, and realizing the accurate prepaying function.

Description

Support the mobile phone user authentication charging method of grouped data prepayment characteristic

Technical field:

The present invention relates to a kind of mobile phone user authentication charging method of supporting grouped data prepayment characteristic.

Background technology:

The CDMA2000 of standard (Code Division Multiple Access, CDMA(Code Division Multiple Access)) network configuration according to the traffic performance difference, can be divided into speech network and data network as shown in Figure 1.The core switching network of CDMA2000 adopts diverse equipment for speech network and data network, and the speech business signaling is by the Signaling System Number 7 network transmission, and data business signaling transmits by IP (Internet Protocol) network.Access Network then adopts in existing base station controller BSC (BaseStation Control) and goes up adding Packet Control Function (PCF, Packet Control Function) module accessing group data service node PDSN (Packet Data Serving).

Traditional voice network is undertaken alternately by moving exchanging center MSC (Mobile SwitchControl) and service control point (SCP) (Service Control Point) by the WIN agreement, MSC finishes function of exchange, SCP finishes authentication, billing function, and both are in conjunction with the expense control that realizes prepaid user's account number.

In the CDMA2000 packet data network, PDSN finishes function of exchange by packet data serving node, finishes authentication, authentication, billing function by AAA (Authentication, Authorization, and Accounting authentication, mandate, record keeping) equipment.Interface protocol between the two is standard RADIUS (the RemoteAuthentication Dial In User Service that meets CDMA2000 packet equipment standard, remote authentication subscriber dialing service) agreement, can be for the standard radius protocol referring to RFC2865, RFC2866, RFC2869, the expansion part of CDMA2000 can be referring to " 3GPP2 P.S0001-A Version 3.0.03 Wireless IPNetwork Standard ".

Mutual signaling in the once successful mobile phone user authentication charging flow between PDSN and the AAA can illustrate that its step comprises with Fig. 2:

A) mobile subscriber requires online, and PDSN sends authentication request message Access-Request to AAA; B) AAA carries out authentication to the user, confirms that the user has the right to login, and sends authentication to PDSN and accepts message Access-Accept; C) PDSN sends the beginning request message Accounting-Request (Start) that charges to AAA; D) AAA receives charging beginning request message Accounting-Request (Start), begins the mobile subscriber is chargeed, and sends to charge to PDSN and asks to receive the response Accounting-Reponse; E) after PDSN arrives the Intermediate Charging ICH report cycle, send Intermediate Charging ICH request Accounting-Request (Interim) to AAA; F) after AAA receives Intermediate Charging ICH request Accounting-Request (Interim), produce interim charging information; G) mobile subscriber finishes online, and PDSN sends charging ending request message Accounting-Request (Stop) to AAA; H) AAA finishes the mobile subscriber is chargeed, and sends to charge to PDSN and asks to receive the response Accounting-Reponse.

The mutual standard radius protocol that meets the CDMA2000 standard that is based at present between PDSN and the AAA.According to the attribute that defines in the present agreement, in the time of can only being implemented in PDSN transmission authentication request message to AAA, carry out disposable budget by AAA according to the user account number fund, the parameter accepting message as authentication of can holding time then is handed down to PDSN, and PDSN arrives the back in the time and sends charging ending request end of message session this time.

When the user opens Packet data service, probably have a plurality of users and use an account number simultaneously, for example the user downloads charged content in online, use speech business etc. in the time of online, if carry out expenses management according to above-mentioned prior art, can cause over-expense, or can cause to allow a user to use account.

Therefore, above-mentioned existing technology can not realize the pre paid functionality of Packet data service, can not control in real time customer charge, that is to say, the prepaid user of traditional voice network can't use Packet data service.

One big advantage of CDMA2000 network is the data services that can provide abundant in content, increases the usage frequency of mobile subscriber to network, improves the profitability of operator.The prepaid user occupies sizable market share in traditional speech network (CDMA-IS95), it is a loss greatly that this part user can not use data service.Especially evolve to the CDMA20001X stage when network, how allowing the prepaid user that belongs to traditional voice network also can enjoy facility that Packet data service brings just becomes the problem solving be badly in need of.

Summary of the invention:

Purpose of the present invention is exactly in order to overcome the above problems, and a kind of mobile phone user authentication charging method of supporting grouped data prepayment characteristic is provided, and realizes the pre paid functionality of Packet data service.

For achieving the above object, the mobile phone user authentication charging method of the support grouped data prepayment characteristic that the present invention proposes comprises the steps: that a) mobile subscriber requires online, and PDSN sends authentication request message (Access-Request) to AAA; B) AAA carries out authentication to the user, if confirm that the user has the right to login, sends authentication to PDSN and accepts message (Access-Accept); C) PDSN sends the beginning request message (Accounting Request (Start)) that charges to AAA; D) AAA receives charging beginning request message (Accounting-Request (Start)), begins the mobile subscriber is chargeed, and sends to charge to PDSN and asks to receive the response (Accounting Reponse); E) after PDSN arrives the Intermediate Charging ICH report cycle, send Intermediate Charging ICH request (Accounting-Request (Interim)) to PDSN; F) after AAA receives Intermediate Charging ICH request (Accounting-Request (Interim)), produce interim charging information; When g) mobile subscriber finished to surf the Net, PDSN sent charging ending request message (Accounting-Request (Stop)) to AAA; H) AAA finishes the mobile subscriber is chargeed, and sends to charge to PDSN and asks to receive the response (Accounting Reponse); It is characterized in that: AAA includes active session in (Accounting Reponse) receiveed the response in the charging request that PDSN sends can keep duration information; Correspondingly, the session activation trigger is arranged in PDSN, this trigger can be kept duration information according to the active session of receiving from AAA and carry out parameter resetting, when trigger conditions satisfies, promptly when active session can be kept duration and uses up, trigger corresponding Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)), report AAA; Also have the metering period trigger in PDSN, this trigger can trigger corresponding Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)) when metering period arrives, report AAA; AAA recomputates active session and can keep duration after receiving arbitrary Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)), and asks to receive the response (Accounting Reponse) to PDSN transmission charging.

Owing to adopted above scheme, the employing of session activation trigger meter and expense cycle trigger make PDSN can segmentation to the AAA application expenses, so just broken through the restriction of nonrecurring charge budget, even the shared account number of a plurality of users can not cause overdraw yet, thereby has paved road for the prepaid user uses data service.Simultaneously, block meter rate can accurately be controlled the user and use the professional time, can realize accurate pre paid functionality.

Description of drawings:

Fig. 1 is the CDMA2000 schematic network structure.

Fig. 2 is a Signalling exchange schematic diagram between PDSN and the AAA.

Fig. 3 is the embodiment of the invention one (pressing duration charging, a remaining sum abundance) operation flow schematic diagram.

Fig. 4 is the embodiment of the invention two (press duration charge, a Sorry, your ticket has not enough value) operation flow schematic diagram.

Fig. 5 is the embodiment of the invention three (charge by flow, a remaining sum abundance) operation flow schematic diagram.

Fig. 6 is the embodiment of the invention four (charge by flow, a Sorry, your ticket has not enough value) operation flow schematic diagram.

Fig. 7 is the embodiment of the invention five (press duration and charge on traffic, a Sorry, your ticket has not enough value) operation flow schematic diagram.

Fig. 8 is the operation flow (charging by flow) that the embodiment of the invention six AAA initiatively cut off PDSN.

Among the figure, RN is Radio Network (wireless network); MN is Mobile Node (mobile node).

Embodiment:

Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.

Following examples can realize the following key characteristic of packet-based prepayment:

1, sectional charge application: for the CDMA mobile subscriber, the situation of the shared same account number of a plurality of users may occur.How to prevent the problem that prepaid user's expense overdraw must will be considered exactly.Realize that PDSN can reach this purpose to the application of AAA sectional charge.PDSN is at set intervals to the AAA application expenses, can prevent that a plurality of user's time useds can be with the situation of actual available duration via greater than account balance.

2, flow control: according to charge on traffic is the very possible a kind of charge mode that adopts in the data service, and the existing standard radius protocol can't allow AAA control prepaid user's residue utilizable flow.Through expansion of the present invention, can realize accurately controlling maintainable uplink traffic of user and downlink traffic.

3, rate is switched: operator probably collects customer charge to the different periods by different rates when reality is runed.The existing standard radius protocol can't make PDSN report and submit rate to switch the flow and the duration of front and back to AAA.

For realizing above several pre-payment key characteristic, need expand the standard radius protocol.Present invention is described below to divide four parts: protocol extension, PDSN/AAA/SCP handling process, typical prepaid user's agreement flow process between the expansion of radius protocol message, the AAA/SCP between the PDSN/AAA.One, PDSN/AAA support prepaid characteristic RADIUS expansion

1.1 the expansion of message identifying:

In the Access-Accept message, set up the prepayment characteristic activation marker.This attribute is whether AAA notice PDSN needs to activate the prepayment service characteristic at this user.If do not comprise this attribute, then PDSN does not activate prepayment characteristic.Its span:

1=activates prepayment characteristic

0=does not activate prepayment characteristic

1.2 the expansion of charging message:

Comprise following several altogether:

A) setting up the user in the Accounting-Response message can keep flow, active session and can keep the time interval (S) of duration, the nearest switching instant of rate next time and current time, current sessions four attributes of end mark whether.

B) in Accounting-Request (Interim-Update) message, set up and report the trigger type attribute;

Above-mentioned extended attribute is described as follows:

1) user can keep uplink traffic, the user can keep uplink traffic

Represent respectively how many kilobytes this connection can also send out or receive.If these two parameters do not occur, then PDSN can not cut off because the flow that uses is too many and connect.These two parameters appear among the Accounting-Response.Purpose is set: control the byte number that current connection can be transmitted.

2) active session can be kept duration

Represent that this is connected the duration kept that is in the session activation state in the current segmentation reservation expense, if this parameter does not occur, then PDSN can not carry out timing to the sustainable duration of session activation state.

The difference of this parameter and standard RADIUS parameter S ession-Timeout: Session-Timeout represents to be in the current segmentation reservation expense duration kept of PPP (Point-to-PointProtocol, point-to-point protocol) session status.

This parameter appears among the Accounting-Response.Purpose is set: AAA control PDSN is in the duration kept of session activation state in current segmentation reservation expense.

3) time interval of tariff switch point and current time

Rate will take place after how long representing to be switched.This duration connects the last Accounting-Request of transmission from this to begin to count.If this parameter does not occur, then PDSN thinks that rate does not take place to be switched.Purpose is set: AAA equipment notice PDSN equipment tariff switch point.

4) trigger type of Interim-Update information reporting

Represent that this value is used for the trigger type that indication reports Accounting-Request (Interim-Update).There are four types at present: metering period trigger, rate handover trigger, session activation trigger, flow trigger.Specific descriptions vide infra.

Span:

1=metering period trigger

2=rate handover trigger

3=session activation trigger

4=flow trigger

5) current sessions end mark whether

This attribute appears among the Accounting-Response, represents whether this session continues.If this property value is 0, then PDSN reports Accounting-Request (stop) at once, and stops session; Otherwise session is proceeded.If this attribute does not occur in Accounting-Response, PDSN does not stop session.

Span

0=false (termination session)

1=true (continuation session)

1.3 increase the Session-Control message of supporting that AAA initiatively cuts off connection:

In the conversation procedure, need AAA initiatively to cut off current calling sometimes.Current standard Radius agreement can't be supported these characteristics.Need newly-increased Session-Control message, send to PDSN, realize the control of business side equipment side by AAA.

Session-Control is the message that increases newly, Code=20, the same standard message of its coded system.The Session-Control message can be regarded as a kind of self-defining New Deal, only it adopted with standard Radius roughly the same seal the mode of closing, identical udp port number (authentication port); This message and Radius message send according to the order of this paper regulation together.

It is Command that a self-defining sub-attribute must be arranged in the message, and content is the integer of 4 bytes.Have only a kind of situation at present: the Terminate-Request message is used to control initiatively disconnect user connection of PDSN.If other attribute has definition in standard Radius, by the position that is placed on the Radius regulation; If expand definition, then be placed among the Vendor-Specific.

But because message is initiatively initiated by AAA, then the identifier value is invalid.PDSN can find connection according to Correlation ID; Two, AAA/SCP protocol extension

2.1 interface summary

AAA in the CDMA2000 packet data network, finish to grouping user authenticate, mandate, accounting feature, at present SCP also has the authentication, accounting feature of couple intelligent subscriber (for intelligent subscriber in CDMA circuit voice network, account information (amount of money, User Status) is deposited among the SCP, and rate, user profile file are deposited among the AAA; Deposit on the AAA for common non intelligent user account number).Packet data network equally also needs to support to deposit in the intelligent account number among the SCP, does not have the interface between AAA and the SCP at present in the standard network model, therefore need expand this interface.

By the AAA-SCP message interface, SCP can finish following function:

1, user account number state verification

2, distribute one section expense for AAA

3, handle the expense that AAA returns to SCP

4, deduction account cost of use

It comprises following message:

1, authentication request message: direction is from AAA to SCP, comprises following four fields: session identification (session of sign one-time continuous, essential), phone number (essential), the IP address (optional) of aaa server, the numbering (optional) of aaa server.

2, authentication request is receiveed the response: direction is from SCP to AAA, comprise following six fields: (essential) responded in the IP address (optional) of session identification (essential), phone number (essential), aaa server, the numbering (optional) of aaa server, the expense (essential) of applying for, authentication, and wherein the value responded of authentication comprises: the 0=authentication by, 1=user data do not exist, the 2=stored value card lost efficacy, the 3=user balance is not more than zero, 4=user blocks, mistake appears in the 5=system.

3, fee request message: direction is from AAA to SCP, comprise following eight fields: the IP address (optional) of session identification (essential), phone number (essential), aaa server, the numbering (optional) of aaa server, action type (essential, 1=application form for cash advances message, 2=expense are returned message), application expenses (action type be essential), remaining cost (action type be optional), return expense (action type be optional) at 1 o'clock at 1 o'clock at 2 o'clock.

4, fee request is receiveed the response: direction is from SCP to AAA, comprise following six fields: the IP address (optional) of session identification (essential), phone number (essential), aaa server, the numbering (optional) of aaa server, action type (essential, the 1=application form for cash advances is receiveed the response, 2=expense return acknowledge message), the expense (action type be essential) of applying at 1 o'clock.Three, PDSN/AAA/SCP processing method

3.1 handling process summary

The segment assignments expense is to support a key property of packet-based prepayment, and for the prepaid user, AAA needs segment assignments PDSN expense, to prevent the shared overdraw that account number may occur of a plurality of users.

For supporting to press the packet-based prepayment characteristic of duration charge on traffic, PDSN need support four kinds of triggers to report Accounting-Request (Interim-Update), tabulates as shown in Table 1: the list of triggers of table one: Accounting-Request (Interim-Update)

The trigger title	Value	Explanation	Applicable situation
The trigger title	Value	Explanation	Applicable situation	The metering period trigger	????1	Be used for reporting when metering period arrives AAA	Press duration/charge on traffic
The session activation trigger	????2	After being used for segmentation and reserving expense CDMA2000 session activation available duration via uses up in can holding time,	Pressing duration charges	The metering period trigger	????1	Be used for reporting when metering period arrives AAA	Press duration/charge on traffic

		Report AAA
		Report AAA		The rate handover trigger	????3	Be used for reporting when tariff switch point arrives AAA	Press duration/charge on traffic
The flow trigger	????4	After being used for segmentation and reserving expense utilizable flow uses up in can holding time, report AAA	Charge by flow	The rate handover trigger	????3	Be used for reporting when tariff switch point arrives AAA	Press duration/charge on traffic

3.1.1 AAA/SCP handles summary

There is following three phases in message flow between AAA and the SCP:

One: authorization phase

AAA receives the Access-Request message that PDSN reports, part as the authentication process flow process sends Auth-Request message to SCP, after the SCP authentication is passed through, returns Fee-Response message, AuthResult=0, FeeApplied are one section expense that SCP distributes to AAA.

Two: the application expenses stage

AAA receives the Accounting-Request (Interim-Update) that PDSN reports, AAA calculated the user according to the time that reports in the message and flow and current rate and use expense in this segmentation time, with this segmentation application to expense deduct the remaining cost that obtains this segmentation with expense, (threshold values is determined by AAA the application expenses threshold values that this remaining cost and AAA are preserved, configurable) relatively, if less than this threshold values, then AAA need apply for sectional charge to SCP, and transmission Fee-Request message, SCP returns Fee-Response message, and FeeApplied is one section expense that SCP distributes to AAA; If be greater than or equal to this threshold values, then AAA is to SCP application sectional charge, calculates maintainable duration of remaining cost or flow according to the remaining cost and the rate of this segmentation.

More than describe and be called AAA application form for cash advances strategy

Three: conversation end stage A AA receives the Account-Request (Stop) that PDSN reports, AAA calculates this segmentation of user and has used expense, this Duan Wei is used up expense return to SCP by Fee-Request message, OperationType parameter=3, for expense is returned message, the expense of FeeReturn parameter for returning.

3.1.2 PDSN/AAA handles summary

For PDSN, need to safeguard four kinds of triggers above-mentioned, the satisfied corresponding Accounting-Request (Interim-Update) that then triggers of any one trigger conditions, and have the ability according to the Accounting-Response message replacement session activation trigger, rate handover trigger, the flow trigger that return.

When having a plurality of expense budget project simultaneously, for example the duration of budget simultaneously, uplink traffic, downlink traffic need to determine a budget amount allocation strategy, and this strategy determines by AAA, and principle is to guarantee that operator do not suffer a loss.Suggestion in every budget (duration, uplink traffic, downlink traffic), can guarantee that the user can not overdraw with the sectional charge mean allocation like this.

For AAA, according to the charging way difference, be divided into multiple occasion, below at only chargeing, only charge by flow, discuss respectively by three kinds of situations of duration charge on traffic simultaneously by duration:

(1) only pressing duration charges:

AAA determines the segmentation application expenses amount of money according to collocation strategy, after PDSN reports Accounting-Request (Start), calculate active session according to active session charging rate up-to-date in next metering period and can keep duration, inserting the active session of Accounting-Response message can keep duration parameters and determine the nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, Accounting-Response message is handed down to PDSN.It is divided into again:

Situation one: the Accounting-Request (Interim-Update) that reports for metering period trigger and rate handover trigger, AAA can keep duration parameters (Acct-Session-Time) according to active session and draw the active session duration, and then draw that the user has used expense in this segmentation, under the situation that this segmentation expense does not use, (belong to most situations, lucky this segmentation expense was used up when exception was reporting message, this moment need be to SCP application expenses again, processing is with situation two), AAA does not need to apply for again sectional charge, only needing that segmentation reservation expense is deducted the user recomputates the active session that active session in this segmentation reservation expense can keep duration and insert Accounting-Response message again with expense and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, Accounting-Response message is handed down to PDSN.

Situation two: the Accounting-Request (Interim-Update) that reports for the session activation trigger, AAA needs again to SCP application sectional charge, calculate active session according to segmentation reservation expense then and can keep duration, insert the active session of Accounting-Response message and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN.

(2) only charge by flow:

AAA determines the segmentation application expenses amount of money according to collocation strategy, after PDSN reports Accounting-Request (Start), according to the expense that is identified for budget uplink traffic and downlink traffic according to the budget amount allocation strategy, calculate the user according to uplink traffic rate downlink traffic rate respectively and can keep uplink traffic and downlink traffic, insert the uplink traffic kept of Accounting-Response message, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, can keep duration parameters to active session and not process, then Accounting-Response message is handed down to PDSN.

Situation one: for metering period trigger and rate handover trigger report Accounting-Request (Interim-Update), AAA is according to account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) parameter draws user's use traffic, and then draw that the user has used expense in this segmentation, under the situation that this segmentation expense does not use, (belong to most situations, lucky this segmentation expense was used up when exception was reporting message, this moment need be to SCP application expenses again, processing is with situation two), AAA does not need to apply for again sectional charge, segmentation reservation expense need be deducted the user and recomputate the flow kept in this segmentation reservation expense again with expense, insert the flow parameter kept of Accounting-Response message, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, Accounting-Response message is handed down to PDSN; Can keep duration parameters to active session and not process, Accounting-Response message is handed down to PDSN.

Situation two: the Accounting-Request (Interim-Update) that reports for the flow trigger, AAA needs again to SCP application sectional charge, recomputate uplink traffic kept and downlink traffic in this segmentation reservation expense with the expense of applying for or remaining cost according to the budget amount allocation strategy then, insert the uplink traffic kept of Accounting-Response message and can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, can keep duration parameters to active session and not process, then Accounting-Response message is handed down to PDSN.

(3) press duration and charge on traffic:

AAA determines the segmentation reservation expense allocation amount of money according to collocation strategy, after PDSN reports Accounting-Request (Start), according to the expense that is identified for budget duration and uplink traffic downlink traffic according to the budget amount allocation strategy, respectively according to the duration rate, the uplink traffic rate, the downlink traffic rate determines that the user can hold time, can keep uplink traffic, can keep uplink traffic, insert the active session of Accounting-Response message and can keep duration, can keep uplink traffic, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, then Accounting-Response message is handed down to PDSN.

Situation one: for metering period trigger and rate handover trigger report Accounting-Request (Interim-Update), AAA is according to Acct-Session-Time and can keep flow parameter and draw user's active session duration and flow, and then draw that the user has used expense in this segmentation, under the situation that this segmentation expense does not use (most situation), AAA does not need to apply for again sectional charge, segmentation reservation expense need be deducted the user and recomputate the duration kept in this segmentation reservation expense with expense and according to the budget amount allocation strategy, can keep uplink traffic, can keep downlink traffic, insert the active session of Accounting-Response message and can keep duration, can keep uplink traffic, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN.

Situation two: the Accounting-Request (Interim-Update) that reports for the session activation trigger, AAA is according to Acct-Session-Time, Acct-Input-Octets, the current sectional charge of having used of Acct-Output-Octets calculation of parameter, with should be higher than certain threshold values by sectional charge (threshold values should be determined by AAA when the user is current, and configurable) time, handle with situation one.When the current sectional charge of user is lower than certain threshold values, AAA needs again to SCP application sectional charge, recomputate the duration kept in this segmentation reservation expense with the expense of applying for or remaining cost according to the budget amount allocation strategy then, can keep uplink traffic, can keep downlink traffic, insert the active session of Accounting-Response message and can keep duration, can keep uplink traffic, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN.

Situation three: the Accounting-Request (Interim-Update) that reports for the flow trigger, AAA is according to Acct-Session-Time, Acct-Input-Octets, the current sectional charge of having used of Acct-Output-Octets calculation of parameter, when the user is higher than certain threshold values with sectional charge, handle with situation one.When the current sectional charge of user is lower than certain threshold values, AAA need be to SCP mail sending charge per message request message, wherein comprise and do not use up sectional charge parameter F eeLeft, the parameter application expenses are for needing the sectional charge of application, recomputate the duration kept in this segmentation reservation expense with the expense of applying for or remaining cost according to the budget amount allocation strategy then, can keep uplink traffic, can keep downlink traffic, insert the active session of Accounting-Response message and can keep duration, can keep uplink traffic, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, Accounting-Response message is handed down to PDSN.

3.1.2 AAA/SCP handles summary

There are following three class situations in message between AAA and the SCP:

1, AAA receives the Access-Request message that PDSN reports, and sends authentication request message as the part of authentication process flow process to SCP, after the SCP authentication is passed through, returns authentication response message, and returns one section expense of applying for of AAA.

2, the Accounting-Request (Interim-Update) that reports of PDSN and AAA calculate this section of user expense and all use, AAA need apply for sectional charge to SCP, mail sending charge per message request message, SCP return application form for cash advances receives the response, and returns one section expense of applying for of AAA.

3, AAA receives the Account-Request (Stop) that PDSN reports, and AAA calculates this section of user and used expense, and this Duan Wei expense that uses is returned to SCP by application form for cash advances message (class of operation=2).

3.2 trigger handling process

3.2.1 metering period trigger handling process

1, PDSN reports Access-Request message and by receiving Access-Accept message after the aaa authentication, determines the cycle that the metering period trigger reports according to the Acct-Interim-Interval parameter in the Access-Accept message.As option, PDSN also can report Accounting-Request (Interim-Update) midway at a metering period according to the situation of this locality configuration;

2, metering period trigger trigger condition satisfies, and PDSN triggers Accounting-Request (Interim-Update), and trigger type is 1;

3, AAA receives Accounting-Request (Interim-Update) (Trigger class=1), according on the button that calls time in this segmentation reservation expense go to charge the time started to the expense that calls time from segmentation reservation expense, reserve expense remainder replacement active session in Accounting-Response message according to segmentation then and can keep duration parameters, rate switching interval parameter;

4, after PDSN receives Accounting-Response message, can keep duration parameters, rate switching interval parameter resetting session activation trigger, rate handover trigger according to active session.

3.2.2 rate handover trigger handling process

1, PSDN receives Accounting-Response message after reporting Accounting-Request (Start) or Accounting-Request (Interim-Update) (Trigger class=1), according to rate switching interval parameter the rate handover trigger is set;

2, rate handover trigger trigger condition satisfies, and PDSN triggers Accounting-Request (Interim-Update), and trigger type is 2;

3, AAA receives Accounting-Request (Interim-Update) (Trigger class=2), according on the button that calls time in this segmentation reservation expense go to charge the time started to the expense that calls time from segmentation reservation expense, if charged according to time then reserve expense remainder replacement active session in Accounting-Response message according to segmentation and can keep duration parameters, rate switching interval parameter; If charge by flow then segmentation reserve the expense remainder and in Accounting-Response message, reset and can keep flow parameter;

3.2.3 the session activation trigger triggers handling process (only pressing duration charges)

1, PSDN receives Accounting-Response message after reporting Accounting-Request (Start) or Accounting-Request (Interim-Update) (Trigger class=1), can keep duration parameters according to active session the session activation trigger is set;

2, session activation trigger trigger condition satisfies, and PDSN triggers Accounting-Request (Interim-Update), and trigger type is 3;

3, AAA receives Accounting-Request (Interim-Update) (Trigger class=3), confirm to need application expenses again, to the SCP mail sending charge per message with request message application sectional charge;

4, SCP is receiveed the response to AAA transmission application form for cash advances according to AAA application amount and user's current residual expense, indicates the expense that AAA applies for;

5, PDSN can keep duration parameters, rate switching interval parameter according to the expense of applying for replacement active session in Accounting-Response message;

6, after PDSN receives Accounting-Response message, can keep duration parameters, rate switching interval parameter, replacement session activation trigger, rate handover trigger according to active session.

3.2.4 flow trigger handling process (only charging by flow)

1, PSDN receives Accounting-Response message after reporting Accounting-Request (Start) or Accounting-Request (Interim-Update) (Trigger class=1), according to keeping flow parameter the flow trigger is set;

2, the flow trigger condition satisfies, and PDSN triggers Accounting-Request (Interim-Update), and trigger type is 4;

3, AAA receives Accounting-Request (Interim-Update) (Trigger class=4), confirm to need application expenses again, to the SCP mail sending charge per message with request message application sectional charge;

4, SCP is receiveed the response to AAA transmission application form for cash advances according to AAA application amount and user's current residual expense, and parameter indicates the expense that AAA applies for;

5, after PDSN receives Accounting-Response message, according to keeping flow parameter replacement flow trigger.

3.3 abnormal conditions are handled

3.3.1 AAA does not receive the processing that the SCP fee request is receiveed the response

3.3.1.1 AAA does not receive that authentication request receives the response

AAA is to the SCP authentication request message, do not receive and thinks under the situation of response that the SCP authentication do not pass through, and sends Access-Reject message to PDSN.

3.3.1.2 AAA does not receive that the fee request of class of operation=1 receives the response

AAA is to the fee request message of SCP transmit operation classification=1, do not receive under the situation of response and thinks to the failure of SCP application expenses, sends Account-Response message, Session-Cont=0 to PDSN.

3.3.1.3 AAA does not receive that the fee request of class of operation=2 receives the response

AAA is to the fee request message of SCP transmit operation classification=2, do not receive to think the failure of expense rollback under the situation of response, and AAA keeps this section and do not use up the next session that expense is used for this user.Four, below the typical protocol flow instance of several support prepaid characteristics.

Following flow process supposes that all AAA notice PDSN activates prepayment characteristic (pre-payment activation marker attribute is changed to 1).

Embodiment one: the operation flow when user balance is sufficient (chargeing, comprise tariff switch point by duration), as shown in Figure 3, it comprises the steps:

A. the mobile subscriber asks to insert, and PDSN sends the Access-Request request authentication to AAA;

B.AAA confirms that caller is the prepaid user, sends the authentication request message fee request to SCP;

C.SCP, returns authentication to AAA and receives the response according to authentication request message application expenses parameter and one section expense of the current remaining sum distributing user of user by subscription authentication, is indicated as being the expense of distributing user;

The d.AAA checking is passed through, and returns authentication request to PDSN and responds Access-Accept message;

E.PDSN reports Accounting-Request (Start) to AAA;

F. the mobile subscriber is the prepaid user and presses duration and charge, AAA is according to distributing the expense computing activation session of gained to hold time by SCP, insert the active session of Accounting-Response message and can keep duration parameters (active session duration), and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN;

G. the metering period trigger arrives, and PDSN triggers Accounting-Request (Interim-Update), Trigger class=1 to AAA, and message comprises that active session can keep duration parameters (Acct-Session-Time);

H.AAA can keep duration parameters (Acct-Session-Time) according to active session and draw the active session duration and draw that the user has used expense in this segmentation, AAA need deduct current sectional charge the user and recomputate active session in this segmentation reservation expense again with expense and can keep duration and insert the active session of Accounting-Response message and can keep duration parameters (active session duration), and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN;

I. the rate handover trigger arrives, and PDSN triggers Accounting-Request (Interim-Update), Trigger class=2 to AAA;

J.AAA can keep duration parameters (Acct-Session-Time) according to active session and draw the active session duration and draw that the user has used expense in this segmentation, AAA need deduct current sectional charge the user and recomputate active session in this segmentation reservation expense again with expense and can keep duration and insert the active session of Accounting-Response message and can keep duration parameters (active session duration), and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), indicate the continuation session, Accounting-Response message is handed down to PDSN;

K. the active session trigger arrives, and PDSN triggers Accounting-Request (Interim-Update), Trigger class=3 to AAA;

L.AAA confirms that the current sectional charge of user uses up, to SCP mail sending charge per message request message fee request, class of operation=1 (application form for cash advances);

M.SCP is according to fee request message application expenses parameter and one section expense of the current remaining sum distributing user of user and return fee request to AAA and respond, class of operation=1 (application form for cash advances response), be indicated as being the expense of distributing user;

N.AAA is according to distributing the expense computing activation session of gained to hold time by SCP, insert the active session of Accounting-Response message and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

O. user's end of packet business;

P.PDSN reports Accounting-Request (Stop) to AAA, comprises that active session can keep duration parameters (Acct-Session-Time);

Q.AAA can keep duration parameters (Acct-Session-Time) according to active session and draw the active session duration and then draw in this segmentation the user with expense with apply for not using in the sectional charge part.AAA confirms to need the return expense, to SCP mail sending charge per message request message, class of operation=2 (expense return);

It is that customer data base adds expense that r.SCP returns the expense parameter according to fee request message, and SCP returns application form for cash advances to AAA receives the response, class of operation=2 (expense is returned and confirmed);

S.AAA returns to keep accounts to PDSN and asks to receive the response Account-Response, indicates end session.

Annotate: above operation flow can be reduced according to actual conditions, for example, can not comprise regularly triggering part of rate switching timing triggering part and active session

Embodiment two: the operation flow when user balance is not enough (chargeing, comprise tariff switch point by duration), as shown in Figure 4, it comprises the steps:

B.AAA confirms that caller is the prepaid user, to SCP mail sending charge per message request message authentication request;

C.SCP, returns authentication to AAA and receives the response according to authentication request message application expenses parameter and one section expense of the current remaining sum distributing user of user by subscription authentication, is the expense of distributing user;

E.PDSN reports Accounting-Request (Start) to AAA;

J.AAA can keep duration parameters (Acct-Session-Time) according to active session and draw the active session duration and draw that the user has used expense in this segmentation, AAA need deduct current sectional charge the user and recomputate active session in this segmentation reservation expense again with expense and can keep duration and insert the active session of Accounting-Response message and can keep duration parameters (active session duration), and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN;

M.SCP affirmation user balance is used up, returns application form for cash advances to AAA and receives the response, class of operation=1 (application form for cash advances is receiveed the response), the expense of applying for=0;

N.AAA does not apply for expense from SCP, sends Accounting-Reponse message to PDSN, and wherein active session conversation end flags parameters=0 indicates end session;

O.PDSN is according to conversation end flags parameters end user business;

The q.AAA accumulation draws the total cost that user conversation uses, and returns Accounting-Reponse message, indicates end session.

Annotate: above operation flow can be reduced according to actual conditions, for example, can not comprise regularly triggering part of rate switching timing triggering part and active session.

Embodiment three: the operation flow (charging by flow, comprise tariff switch point) when user balance is sufficient, as shown in Figure 5, it comprises the steps:

C.SCP, returns authentication to AAA and receives the response according to fee request message application expenses parameter and one section expense of the current remaining sum distributing user of user by subscription authentication, is indicated as being the expense of distributing user;

E.PDSN reports Accounting-Request (Start) to AAA;

F. the mobile subscriber is the prepaid user and charges by flow, AAA calculates according to the expense of being distributed gained by SCP can keep flow, insert the flow parameter kept of Accounting-Response message, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

H.AAA is according to account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) is calculated and currently to be drawn the active session duration with the sectional charge parameter and draw the interior user of this segmentation and used expense, AAA need deduct current sectional charge the flow parameter kept that the user has recomputated the flow kept in this segmentation expense again with expense and inserted Accounting-Response message, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

J.AAA is according to account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) parametric user has used this segmentation expense, AAA need deduct current sectional charge with expense and recomputate the flow parameter kept that the flow kept in this segmentation expense is inserted Accounting-Response message again, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), indicate the continuation session, Accounting-Response message is handed down to PDSN;

K. the flow trigger arrives, and PDSN triggers Accounting-Request (Interim-Update), Trigger class=4 to AAA;

L.AAA confirms that the current sectional charge of user uses up, to SCP mail sending charge per message request message fee request, class of operation=2 (application form for cash advances);

M.SCP is according to fee request message application expenses parameter and one section expense of the current remaining sum distributing user of user and return application form for cash advances to AAA and respond application form for cash advances and respond, class of operation=1 (fee request response), be indicated as being the expense of distributing user;

N.AAA calculates according to the expense of being distributed gained by SCP can keep flow, insert the flow parameter kept of Accounting-Response message, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

O. user's end of packet business;

P.PDSN reports Accounting-Request (Stop) to AAA, comprises account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) parameter;

Q.AAA draws account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) parameter with flow and then draw in this segmentation the user with expense with apply for not using in the sectional charge part according to parameter.AAA confirms to need the return expense, to SCP mail sending charge per message request message, class of operation=2 (expense return);

It is that customer data base adds expense that r.SCP returns the expense parameter according to fee request message, and SCP returns expense to AAA and returns acknowledge message, class of operation=2 (expense is returned and confirmed);

Embodiment four: the operation flow (charging by flow, comprise tariff switch point) when user balance is not enough, as shown in Figure 6, it comprises the steps:

B.AAA confirms that caller is the prepaid user, to SCP mail sending charge per message request message fee request;

C.SCP according to authentication request message application expenses parameter and one section expense of the current remaining sum distributing user of user, returns authentication request to AAA and responds, and indicate the expense of distributing user by subscription authentication;

E.PDSN reports Accounting-Request (Start) to AAA;

F. the mobile subscriber is the prepaid user and charges by flow, AAA is according to distributing the expense calculated flow rate of gained to hold time by SCP, insert the flow parameter kept of Accounting-Response message, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

H.AAA is according to account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) calculation of parameter is current to be drawn the active session duration with the sectional charge parameter and draws that the user has used expense in this segmentation, AAA need deduct current sectional charge the flow parameter kept that the user has recomputated the flow kept in this segmentation expense again with expense and inserted Accounting-Response message, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

N.AAA does not apply for expense from SCP, sends Accounting-Reponse message to PDSN, wherein can keep flow=0, indicates end session;

O.PDSN is according to conversation end flags parameters end user business;

Q.AAA returns to keep accounts to PDSN and asks to receive the response Account-Response, indicates end session.

Embodiment five: the operation flow when user balance is sufficient (by the duration charge on traffic, comprise tariff switch point), as shown in Figure 7, it comprises the steps:

C.SCP, returns authentication request to AAA and receives the response, and be indicated as being the expense of distributing user according to fee request message application expenses parameter and one section expense of the current remaining sum distributing user of user by subscription authentication;

E.PDSN reports Accounting-Request (Start) to AAA;

F. the mobile subscriber is the prepaid user and presses the duration charge on traffic, AAA is identified for the expense of budget duration and flow according to time flow amount of money allocation strategy, calculating the user according to duration rate and flow rate respectively can hold time and can keep flow, inserting the active session of Accounting-Response message respectively can keep duration parameters and can keep flow parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

H.AAA can keep duration parameters (Acct-Session-Time) and account's input word joint number (Acct-Input-Octets) according to active session, account's output word joint number (Acct-Output-Octets) parameter draws user's active session duration and flow, and then draw that the user has used expense in this segmentation, AAA deducts the user with segmentation reservation expense and recomputates the duration kept in this segmentation reservation expense again and can keep flow with expense and according to time flow amount of money allocation strategy, insert the flow parameter kept and the active session of Accounting-Response message and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

J.AAA can keep duration parameters (Acct-Session-Time) and account's input word joint number (Acct-Input-Octets) according to active session, account's output word joint number (Acct-Output-Octets) parameter draws user's active session duration and flow, and then draw that the user has used expense in this segmentation, AAA deducts the user with segmentation reservation expense and recomputates the duration kept in this segmentation reservation expense again and can keep flow with expense and according to time flow amount of money allocation strategy, insert the flow parameter kept and the active session of Accounting-Response message and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

K. the active session trigger arrives, and PDSN triggers Accounting-Request (Interim-Update), Trigger class=2 to AAA;

L.AAA can keep duration parameters (Acct-Session-Time) according to the active session of Accounting-Request (Interim-Update), account's input word joint number (Acct-Input-Octets), the current sectional charge of having used of account's output word joint number (Acct-Output-Octets) calculation of parameter, when confirming that the current sectional charge of user is lower than certain threshold values, AAA needs again to SCP application sectional charge, to SCP mail sending charge per message request message, the application expenses parameter is for needing the expense of application, recomputate the duration kept in this segmentation reservation expense again according to time flow amount of money allocation strategy then and can keep the flow segmentation and reserve expense and calculate active session respectively and can keep duration, insert the flow parameter kept and the active session of Accounting-Response message and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN;

N.AAA is identified for the expense of budget duration and flow according to time flow amount of money allocation strategy, calculating the user according to duration rate and flow rate respectively can hold time and can keep flow, inserting the active session of Accounting-Response message respectively can keep duration parameters and can keep flow parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

O. the flow trigger arrives, and PDSN triggers Accounting-Request (Interim-Update), Trigger class=2 to AAA;

P.AAA can keep duration parameters (Acct-Session-Time) according to the active session of Accounting-Request (Interim-Update), account's input word joint number (Acct-Input-Octets), the current sectional charge of having used of account's output word joint number (Acct-Output-Octets) calculation of parameter, when confirming that the current sectional charge of user is lower than certain threshold values, AAA needs again to SCP application sectional charge, recomputate the duration kept in this segmentation reservation expense again according to time flow amount of money allocation strategy then and can keep the flow segmentation and reserve expense and calculate active session respectively and can keep duration, insert the flow parameter kept and the active session of Accounting-Response message and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), Accounting-Response message is handed down to PDSN;

Q.SCP is according to fee request message application expenses parameter and one section expense of the current remaining sum distributing user of user and return application form for cash advances to AAA and respond application form for cash advances and respond, class of operation=1 (fee request response), be indicated as being the expense of distributing user;

R.AAA is identified for the expense of budget duration and flow according to time flow amount of money allocation strategy, calculating the user according to duration rate and flow rate respectively can hold time and can keep flow, inserting the active session of Accounting-Response message respectively can keep duration parameters and can keep flow parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

S. user's end of packet business;

T.PDSN reports Accounting-Request (Stop) to AAA, comprises that active session can keep duration parameters (Acct-Session-Time), account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) parameter;

U.AAA can keep duration parameters (Acct-Session-Time), account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) parameter with flow and duration and then draw in this segmentation the user with expense with apply for not using in the sectional charge part according to active session.AAA confirms to need the return expense, to SCP mail sending charge per message request message fee request, class of operation=2 (expense return);

It is that customer data base adds expense that v.SCP returns the expense parameter according to fee request message, and SCP returns fee request to AAA receives the response, class of operation=2 (expense is returned and confirmed);

W.AAA returns to keep accounts to PDSN and asks to receive the response Account-Response, indicates end session.

Embodiment six: AAA initiatively cuts off the operation flow (charging by flow) of PDSN, sees Fig. 8, and it comprises the steps:

B.AAA confirms that caller is the prepaid user, to SCP mail sending charge per message request message Fee-Request;

C.SCP, returns authentication request to AAA and receives the response, and be indicated as being the expense of distributing user according to authentication request message application expenses parameter and one section expense of the current remaining sum distributing user of user by subscription authentication;

D.AAA passes through to checking, and PDSN returns authentication request and responds Access-Accept message;

E.PDSN reports Accounting-Request (Start) message to AAA;

F. the mobile subscriber is the prepaid user and presses the duration charge on traffic, AAA is identified for the expense of budget duration and flow according to time flow amount of money allocation strategy, calculating the user according to duration rate and flow rate respectively can hold time and can keep flow, inserting the active session of Accounting-Response message respectively can keep duration parameters and can keep the upstream and downstream flow parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

G. Accounting-Response message is handed down to PDSN;

H. the metering period trigger arrives, and PDSN triggers Accounting-Request (Interim-Update) message, trigger type=1 to AAA, and message comprises the Acct-Session-Time parameter;

I.AAA is according to Acct-Session-Time and Acct-Input-Octets, the Acct-Output-Octets parameter draws user's active session duration and flow, and then draw that the user has used expense in this segmentation, AAA deducts the user with segmentation reservation expense and recomputates the duration kept in this segmentation reservation expense again and can keep flow with expense and according to time flow amount of money allocation strategy, insert the uplink traffic kept of Accounting-Response message and downlink traffic parameter and active session and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

J. Accounting-Response message is handed down to PDSN;

K. the rate handover trigger arrives, and PDSN triggers Accounting-Request (Interim-Update) message, trigger type=2 to AAA;

L.AAA is according to Acct-Session-Time and Acct-Input-Octets, the Acct-0utput-Octets parameter draws user's active session duration and flow, and then draw that the user has used expense in this segmentation, AAA deducts the user with segmentation reservation expense and recomputates the duration kept in this segmentation reservation expense again and can keep flow with expense and according to time flow amount of money allocation strategy, insert the uplink traffic kept of Accounting-Response message and downlink traffic parameter and active session and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, indicate the continuation session, Accounting-Response message is handed down to PDSN;

M. Accounting-Response message is handed down to PDSN;

N.AAA determines terminated call, sends Session-Control message, Command parameter=Terminate-Request to PDSN;

O.PDSN end of packet business;

P.PDSN reports Accounting-Request (Stop) message to AAA, comprises Acct-Session-Time, Acct-Input-Octets, Acct-Output-Octets parameter;

Q.AAA according to Acct-Session-Time, Acct-Input-Octets, Acct-Output-Octets parameter with flow and duration and then draw in this segmentation the user with expense with apply for not using in the sectional charge part.AAA confirms to need the return expense, to SCP mail sending charge per message request message, message parameter class of operation=2 (expense return);

It is that customer data base adds expense that r.SCP returns the expense parameter according to fee request message, and SCP returns expense to AAA and returns acknowledge message, message parameter class of operation=2 (expense is returned and confirmed);

S.AAA returns to keep accounts to PDSN and asks to receive the response Account-Response, indicates end session;

As can be seen from the above description, the present invention has realized several big crux characteristic of packet-based prepayment: 1, sectional charge application, 2, flow control (distinguishing the uplink traffic downlink traffic), 3, rate are switched.By these characteristics and then realized the real-time control of customer charge.

Claims

1, a kind of mobile phone user authentication charging method of supporting grouped data prepayment characteristic comprises the steps:

A) mobile subscriber requires online, and PDSN sends authentication request message (Access-Request) to AAA;

B) AAA carries out authentication to the user, if confirm that the user has the right to login, sends authentication to PDSN and accepts message (Access-Accept);

C) PDSN sends the beginning request message (Accounting-Request (Start)) that charges to AAA;

D) AAA receives charging beginning request message (Accounting-Request (Start)), begins the mobile subscriber is chargeed, and sends to charge to PDSN and asks to receive the response (Accounting-Reponse);

E) after PDSN arrives the Intermediate Charging ICH report cycle, send Intermediate Charging ICH request (Accounting-Request (Interim)) to AAA;

F) after AAA receives Intermediate Charging ICH request (Accounting-Request (Interim)), produce interim charging information; And the transmission charging asks to receive the response Accounting-Response message;

When g) mobile subscriber finished to surf the Net, PDSN sent charging ending request message (Accounting-Request (Stop)) to AAA;

H) AAA finishes the mobile subscriber is chargeed, and sends to charge to PDSN and asks to receive the response (Accounting-Reponse);

It is characterized in that:

AAA includes active session in (Accounting-Reponse) receiveed the response in the charging request that PDSN sends can keep duration information; Correspondingly, the session activation trigger is arranged in PDSN, this trigger can be kept duration information according to the active session of receiving from AAA and carry out parameter resetting, when trigger conditions satisfies, promptly when active session can be kept duration and uses up, trigger corresponding Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)), report AAA;

Also have the metering period trigger in PDSN, this trigger can trigger corresponding Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)) when metering period arrives, report AAA;

AAA recomputates active session and can keep duration after receiving arbitrary Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)), and asks to receive the response (Accounting-Reponse) to PDSN transmission charging.

2, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 1, it is characterized in that: AAA also includes rate switching interval parameter, the promptly nearest switching instant of rate next time and the time interval of current time in (Accounting-Reponse) receiveed the response in the charging request that PDSN sends; Correspondingly, the rate handover trigger is arranged in PDSN, this trigger can carry out parameter resetting according to the rate switching interval parameter of receiving from AAA, when trigger conditions satisfies, promptly when rate switching instant arrival next time, trigger corresponding Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)), report AAA.

3, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 1 is characterized in that: AAA also includes in (Accounting-Reponse) receiveed the response in the charging request that PDSN sends can keep flow parameter; Correspondingly, the flow trigger is arranged in PDSN, this trigger can carry out parameter resetting according to the flow parameter of receiving from AAA kept, when trigger conditions satisfies, promptly reach to keep the flow parameter value time when user's data flow transmitted amount, trigger corresponding Intermediate Charging ICH solicited message (Accounting-Request (Interim-update)), report AAA.

4,, it is characterized in that in the step b) therein that the process of the user being carried out authentication is as the mobile phone user authentication charging method of claim 1 or 2 or 3 described support grouped data prepayment characteristics: b1) AAA to the SCP mail sending charge per message with request message and authentication request message; B2) if SCP by subscription authentication, then SCP returns authentication to AAA and receives the response according to the application expenses parameter in the fee request message and one section expense of the current remaining sum distributing user of user, is indicated as being the expense of distributing user.

5, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 4, it is characterized in that: when only pressing the duration charging, in step d), after AAA receives the beginning request message (Accounting-Request (Start)) that charges, calculate active session according to active session charging rate up-to-date in next metering period and can keep duration, inserting the receive the response active session of (Accounting-Response) of the request of chargeing and to keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge the request receive the response (Accounting-Response) be handed down to PDSN.

6, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 5, it is characterized in that: in step e), the Intermediate Charging ICH solicited message (Accounting-Request (Interim-Update)) that reports for metering period trigger and rate handover trigger, AAA can keep duration parameters (Acct-Session-Time) according to active session wherein and draw the active session duration, and then draw that the user has used expense in this segmentation, under the situation that this segmentation expense does not use, AAA deducts the user with segmentation reservation expense can keep duration with the active session that expense recomputates in this segmentation reservation expense more, under the situation that this segmentation expense is used up, AAA needs to apply for sectional charge to SCP again, calculates active session according to segmentation reservation expense then and can keep duration; Inserting the active session that the request of chargeing receives the response in (Accounting-Response) after the calculating and can keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge the request receive the response (Accounting-Response) be handed down to PDSN.

7, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 5, it is characterized in that: in step e), the Intermediate Charging ICH solicited message (Accounting-Request (Interim-Update)) that reports for the session activation trigger, AAA needs again to SCP application sectional charge, calculate active session according to segmentation reservation expense then and can keep duration, inserting the receive the response active session of (Accounting-Response) of the request of chargeing and to keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), will charge the request receive the response (Accounting-Response) be handed down to PDSN.

8, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 4, it is characterized in that: when only charging by flow, in step d), after AAA receives the beginning request message (Accounting-Request (Start)) that charges, according to the expense that is identified for budget uplink traffic and downlink traffic according to the budget amount allocation strategy, calculate the user according to uplink traffic rate downlink traffic rate respectively and can keep uplink traffic and downlink traffic, inserting the receive the response uplink traffic kept of (Accounting-Response) of the request of chargeing, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge then the request receive the response (Accounting-Response) be handed down to PDSN.

9, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 8, it is characterized in that: in step e), the Intermediate Charging ICH solicited message (Accounting-Request (Interim-Update)) that reports for metering period trigger and rate handover trigger, AAA is according to account's input word joint number (Acct-Input-Octets), account's output word joint number (Acct-Output-Octets) draws user's use traffic, and then draw that the user has used expense in this segmentation, under the situation that this segmentation expense does not use, AAA deducts the user with segmentation reservation expense and recomputates the flow kept in this segmentation reservation expense again with expense, under the situation that this segmentation expense is used up, AAA needs to apply for sectional charge to SCP again, calculates according to segmentation reservation expense then and can keep flow; To calculate after the calculating the flow kept insert the receive the response flow parameter kept of (Accounting-Response) of the request of chargeing, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge the request receive the response (Accounting-Response) be handed down to PDSN.

10, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 8, it is characterized in that: in step e), the Intermediate Charging ICH solicited message (Accounting-Request (Interim-Update)) that reports for the flow trigger, AAA needs again to SCP application sectional charge, calculate according to segmentation reservation expense then and can keep flow, insert the flow parameter kept of Accounting-Response message, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge then the request receive the response (Accounting-Response) be handed down to PDSN.

11, as claim 6 or 7 or the mobile phone user authentication charging method of 9 or 10 described support grouped data prepayment characteristics, it is characterized in that: use up when AAA confirms the current sectional charge of user, when the SCP mail sending charge per message is used the request message requests expense, if SCP confirms user balance and uses up, return application form for cash advances to AAA and receive the response, the expense of applying for=0; AAA does not apply for expense from SCP, sends the request of charging to PDSN and receives the response (Accounting-Reponse), and wherein conversation end sign=0 indicates end session; PDSN is according to conversation end flags parameters end user business.

12, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 4, it is characterized in that: when pressing duration and charge on traffic simultaneously, in step d), after AAA receives the beginning request message (Accounting-Request (Start)) that charges, according to the expense that is identified for budget duration and uplink traffic downlink traffic according to the budget amount allocation strategy, respectively according to the duration rate, the uplink traffic rate, the downlink traffic rate determines that the user can hold time, can keep uplink traffic, can keep uplink traffic, inserting the receive the response active session of (Accounting-Response) of the request of chargeing and to keep duration, can keep uplink traffic, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge then the request receive the response (Accounting-Response) be handed down to PDSN.

13, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 12, it is characterized in that: in step e), the Intermediate Charging ICH solicited message (Accounting-Request (Interim-Update)) that reports for metering period trigger and rate handover trigger, AAA can keep duration parameters (Acct-Session-Time) and can keep flow parameter according to active session and draw user's active session duration and flow, and then draw that the user has used expense in this segmentation, under the situation that this segmentation expense does not use, AAA deducts the user with segmentation reservation expense and recomputates the duration kept in this segmentation reservation expense with expense and according to the budget amount allocation strategy, can keep uplink traffic, can keep downlink traffic, inserting the receive the response active session of (Accounting-Response) of the request of chargeing and to keep duration, can keep uplink traffic, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval (rate switching duration), will charge the request receive the response (Accounting-Response) be handed down to PDSN.

14, mobile phone user authentication charging method as claim 12 or 13 described support grouped data prepayment characteristics, it is characterized in that: in step e), the Intermediate Charging ICH solicited message (Accounting-Request (Interim-Update)) that reports for the session activation trigger, AAA can keep duration parameters (Acct-Session-Time) according to active session, account's input word joint number (Acct-Input-Octets), the current sectional charge of having used of account's output word joint number (Acct-Output-Octets) calculation of parameter, if the current sectional charge of user is lower than predetermined threshold values, AAA is again to SCP application sectional charge, otherwise directly enter next step: recomputate the duration kept in this segmentation reservation expense with the expense of applying for or remaining cost according to the budget amount allocation strategy then, can keep uplink traffic, can keep downlink traffic, inserting the receive the response active session of (Accounting-Response) of the request of chargeing and to keep duration, can keep uplink traffic, can keep the downlink traffic parameter, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge the request receive the response (Accounting-Response) be handed down to PDSN.

15, mobile phone user authentication charging method as claim 12 or 13 described support grouped data prepayment characteristics, it is characterized in that: in step e), the Intermediate Charging ICH solicited message (Accounting-Request (Interim-Update)) that reports for the flow trigger, AAA can keep duration parameters (Acct-Session-Time) according to active session, account's input word joint number (Acct-Input-Octets), the current sectional charge of having used of account's output word joint number (Acct-Output-Octets) calculation of parameter, if the current sectional charge of user is lower than reservation threshold, AAA need be to SCP mail sending charge per message request message, comprise the sectional charge that does not use up sectional charge parameter (FeeLeft) and need application in the message, otherwise directly enter next step: recomputate the duration kept in this segmentation reservation expense again and can keep the flow segmentation and reserve expense and calculate active session respectively and can keep duration according to time flow amount of money allocation strategy, inserting the receive the response flow parameter kept and the active session of (Accounting-Response) of the request of chargeing and to keep duration parameters, and the definite nearest switching instant of rate next time and the time interval of current time, insert rate switching interval parameter, will charge the request receive the response (Accounting-Response) be handed down to PDSN.

16, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 1 is characterized in that: in step b), described authentication is accepted to include the prepayment characteristic activation marker in the message (Access-Accept).

17, the mobile phone user authentication charging method of support grouped data prepayment characteristic as claimed in claim 1, it is characterized in that: when needs AAA initiatively cuts off current calling, send one by AAA to PSDN and interrupt conversation request message (Terminate-Request), the request terminated call.