CN101621780A - Off-line roam charging method for IP multimedia subsystem - Google Patents
Off-line roam charging method for IP multimedia subsystem Download PDFInfo
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- CN101621780A CN101621780A CN200810136026A CN200810136026A CN101621780A CN 101621780 A CN101621780 A CN 101621780A CN 200810136026 A CN200810136026 A CN 200810136026A CN 200810136026 A CN200810136026 A CN 200810136026A CN 101621780 A CN101621780 A CN 101621780A
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Abstract
The invention discloses an off-line roam charging method for an IP multimedia subsystem, comprising: a home location service call session control function entity of a user or a home location charging center receives the roam information; the home location service call session control function entity or the home location charging center judges whether the user is in a roam state according to the received roam information and the home location network identification information of the user; a charging related network element of the home location network of the user and/or a charging related network element of a destination location network element of the user send a charging request containing the roam information to the respective charging data function entity; in response to the charging request, the charging data function entity generates a conversation bill and adds the roam information in the conversation bill corresponding to the designated network element; a charging gateway function body carries out storage, sorting and/or correlation of charging bills on the user according to the bills to obtain a comprehensive bill, and sends the comprehensive bill to the charging center.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of IP Multimedia System (IP Multimedia Subsystem, off-line roam charging method IMS) of being used for
Background technology
The IMS network is to insert irrelevant network, its business, control and carry separated from one another.In IMS, chain of command IMS taproot network element CSCF (Call Session ControlFunction, call conversation control function entity) is responsible for professional the triggering and route.Wherein P-CSCF (Proxy-CSCF, proxy CSCF) is the at first tie point of Access Network to IMS, is arranged in access domain; I-CSCF (Interrogating-CSCF, inquiry CSCF) is responsible for and P-CSCF, HSS (Home Subscriber Server, ownership place subscribed services device) the mutual identification authentication that carries out UE that cooperates, and further inquire about available S-CSCF (Serving-CSCF, serving CSCF) information, route SIP (Session InitializationProtocol, session initiation protocol) signaling.S-CSCF carries out authentication and mandate and carries out route and professional the triggering the user.HSS, I-CSCF and S-CSCF are positioned at home network.
In the IMS network, when the user initiates business (UE caller), the user will be routed to user's ownership place,---the direction of＞S-CSCF---＞P-CSCF---＞UE that user's business that terminates then is to follow I-CSCF after visit ground inserts by IP-CAN and P-CSCF.Under the non-roaming scene, UE is at the P-CSCF of ownership place registration ownership place, and under roaming scence, when the user initiated business, UE registered on the P-CSCF on visit ground.No matter be roaming or non-roaming scene, signaling is through behind the P-CSCF, P-CSCF adds the network identification information that P-Visited-Network-ID represents visit ground (Visit Domain), after being routed to the I-CSCF of ownership place (Home Domain), the I-CSCF of home network can pass through UAR (User Authorization Request, user-authorization-request) information query HSS, the HSS authentication confirms that this user can just allow to enter home network after Visit Domain visit.At this moment HSS returns the message of allow authorizing and gives I-CSCF, and the S-CSCF that the I-CSCF inquiry is available, and route SIP signaling is to that S-CSCF network element more than is exactly the process that user roaming scence under initiates business.
As shown in Figure 1, comprise following processing according to roam procedure in the IMS network of correlation technique:
(11) UE registers P-CSCF in accesses network, and the information of P-CSCF adding accesses network is inserted the P-Visited-Network-ID of sip message head, and for example, value is bjChinamobile.com, and the expression accesses network is Beijing China Mobile.
(12) P-CSCF route sip message is to I-CSCF;
(13) I-CSCF follows Diameter by Cx interface and sends the UAR user authorization request message to HSS, the value of the P-Visited-Network-ID of the Visited-Network-Identifier value sip message among the UAR, HSS is value and the good roaming scheme of configured in advance of this Visited-Network-Identifier relatively, determine whether allowing this accesses network P-CSCF roaming access belonging area, and return acknowledge message and give I-CSCF;
(14) if authorize permission, the S-CSCF that the I-CSCF inquiry is available, and carry the accesses network identification information in the P-Visited-Network-ID of sip message head, route sip message to an available S-CSCF.
Although at present service roaming has been proposed clear and definite processing scheme, yet, roaming not only needs the signatory user of ownership place to leave its belonging area network and enters accesses network and communicate, but further need outside call rate, collect certain roaming charges respectively to calling and called, this is because roam charge is the problem that must consider in the actual operation.But do not mention the charging processing under the roaming scence in the present 3GPP IMS Freight Basis.
Summary of the invention
Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is to provide a kind of off-line roam billing scheme that is used for IP Multimedia System, can't realize the problem that off-line roam charges to solve in the correlation technique in IP Multimedia System.
According to an aspect of the present invention, provide a kind of off-line roam charging method that is used for IP Multimedia System.
The off-line roam charging method that is used for IP Multimedia System according to the present invention comprises:
User's ownership place service call session control function entity or ownership place charging center receive roaming information; Whether ownership place service call session control function entity or ownership place charging center are in roaming state according to the roaming information of its reception and user's belonging area network identification information judgment user; The charging related network elements of the charging related network elements of user's belonging area network and/or user's access zone network sends the charging request that comprises roaming information to the charging data function entity of place network separately; In response to the request of chargeing, the charging data function entity produces ticket, and increases roaming information corresponding to the ticket of specifying network element in ticket; Charging gateway function body is carried out storage, letter sorting and/or the association of charging bill according to ticket to the user, obtains comprehensive ticket, and comprehensive ticket is sent to the charging center.
Wherein, before ownership place service call session control function entity or ownership place charging center reception roaming information, this method further comprises: the user when access zone network is registered, user's access zone network is carried at roaming information in the field of conversation initiating protocol message of registration message, and registration message is sent to the ownership place service call session control function entity.
And, judged by the ownership place charging center whether the user is under the situation of roaming state, and this method can further comprise: the message that will be comprised roaming information by the ownership place call conversation control function entity is sent to the ownership place charging center via ownership place charging data function entity in the middle of the charging data function entity and charging gateway function body.
In addition, judging by the ownership place service call session control function entity whether the user is under the situation of roaming state, and before the ownership place service call session control function entity received roaming information, this method can further comprise:
User's visit ground proxy call conversation control function entity inserts the ownership place query call conversation control function entity that the access zone network sign sends to the user with its message that comprises roaming information that receives from the user; Signatory verification is inquired about and roamed to ownership place query call conversation control function entity at user's ownership place subscribed services device, and the message that will comprise roaming information is routed to user's ownership place service call control function entity, finishes user's registration.
In addition, ownership place service call session control function entity or charging center judge that the processing whether user is in roaming state is specially: user's belonging area network identification information and roaming information are compared, be in roaming state both sides' situation inequality relatively user that judges; Otherwise judge that the user is not in roaming state.
And, judging that the user is under the situation of roaming state, this method can further comprise: the type of the residing roaming state of determining the user according to user's belonging area network identification information and roaming information.
Preferably, roaming information in the request of chargeing and the roaming information in the ticket be integer variable, and, be under 0 the situation, to represent that the user is not in roaming state in integer variable; In integer variable is under the situation of positive integer, and the expression user is in roaming state, and utilizes different positive integer value to represent the type of different roaming states respectively.
And, judging by the ownership place service call session control function entity whether the user is under the situation of roaming state, charging gateway function body is carried out charging bill storage, letter sorting and/or the related processing that obtains comprehensive ticket and is specially: charging gateway function body sorts out the roaming ticket according to user's roaming information, and generates the comprehensive ticket that comprises roaming information in conjunction with the charging related network elements of belonging area network and/or the pairing ticket of charging related network elements of access zone network.
In addition, above-mentioned user is calling subscriber and/or called subscriber.
And, specify network element comprise following one of at least: visit ground proxy call conversation control function entity, home agent call conversation control function entity, visit ground application service network element, ownership place application service network element, ownership place service call session control function entity, ownership place query call conversation control function entity, ownership place subscribed services device.
In addition, above-mentioned roaming information is the network identification information of user's visit ground proxy call conversation control function entity.And above-mentioned belonging area network identification information is pre-configured user's a belonging area network information.
By technique scheme of the present invention, can realize in the IMS network that professional off-line roam charges, and guarantees benefits of operators.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the processing schematic diagram according to the service roaming of correlation technique;
Fig. 2 a is the flow chart that carries out the mode one that the off-line roam of IMS charges according to the method for the embodiment of the invention;
Fig. 2 b is the flow chart that carries out the mode two that the off-line roam of IMS charges according to the method for the embodiment of the invention;
Fig. 3 is the processing schematic diagram of judging according to roaming in the processing example 1 of the method for the embodiment of the invention;
Fig. 4 is the schematic diagram according to the hierarchical layout of charging center in the processing example 1 of the method for the embodiment of the invention;
Fig. 5 is the processing schematic diagram of judging according to roaming in the processing example 2 of the method for the embodiment of the invention;
Fig. 6 is the signaling process figure that handles for the irrelevant professional charging of session according in the processing example 2 of the method for the embodiment of the invention;
Fig. 7 is the signaling process figure that handles for the charging of session related service according in the processing example 2 of the method for the embodiment of the invention.
Embodiment
In embodiments of the present invention, provide a kind of off-line roam charging method that is used for IP Multimedia System (IMS).
The off-line roam charging method that is used for IP Multimedia System according to the embodiment of the invention comprises:
The ownership place S-CSCF or ownership place charging center (BS) that carry out professional user receive roaming information (wherein, the roaming information that BS receives need arrive BS afterwards through the transparent transmission of a plurality of network elements); Whether ownership place S-CSCF or ownership place BS are in roaming state according to the roaming information of its reception and user's belonging area network identification information judgment user; (Charging Data Function CDF) sends the charging request that comprises roaming information to the charging related network elements of the charging related network elements of user's belonging area network and/or user's access zone network to the charging data function entity of place network separately; In response to the request of chargeing, CDF produces ticket, and increases roaming information corresponding to the ticket of specifying network element in ticket; Charging gateway function body (CGF) is carried out storage, letter sorting and/or the association of charging bill according to ticket to the user, obtains comprehensive ticket, and comprehensive ticket is sent to BS.
Wherein, (mode one shown in Fig. 2 a) is before ownership place S-CSCF or ownership place BS reception roaming information, this method further comprises: the user when access zone network is registered, user's access zone network is carried at roaming information in the field of conversation initiating protocol message of registration message, and registration message is sent to ownership place S-CSCF.
That is to say, in order to realize the IMS roam charge, the S-CSCF network element need pass to CDF as the part of charge information with roaming information, and generates CDR pass to CGF on CDF, is made the relevant treatment of roam charge and account sorting again by the charging center at operator place.By carrying roaming information, can solve the problem of roaming information disappearance in the present IMS ticket, be convenient to realize roam charge again.
And, judged by ownership place BS whether the user is under the situation of roaming state, and this method can further comprise: the message that will be comprised roaming information by the ownership place call conversation control function entity is sent to ownership place BS via ownership place CDF in the middle of the CDF and CGF.
In addition, judging by ownership place S-CSCF whether the user is under the situation of roaming state, and before ownership place S-CSCF received roaming information, this method can further comprise:
User's visit ground P-CSCF inserts the ownership place I-CSCF that the access zone network sign sends to the user with its message that comprises roaming information that receives from the user; Ownership place I-CSCF inquires about and roams signatory verification at user's ownership place subscribed services device, and the message that will comprise roaming information is routed to user's ownership place service call control function entity, finishes user's registration (mode two shown in Fig. 2 b).
In addition, ownership place S-CSCF or BS judge that the processing whether user is in roaming state is specially: user's belonging area network identification information and roaming information are compared, be in roaming state both sides' situation inequality relatively user that judges; Otherwise judge that the user is not in roaming state.
And, judging that the user is under the situation of roaming state, this method can further comprise: the type of the residing roaming state of determining the user according to user's belonging area network identification information and roaming information.
Preferably, roaming information in the request of chargeing and the roaming information in the ticket be integer variable, and, be under 0 the situation, to represent that the user is not in roaming state in integer variable; In integer variable is under the situation of positive integer, and the expression user is in roaming state, and utilizes different positive integer value to represent the type of different roaming states respectively.
For example, the belonging area network information that S-CSCF network element or charging center (BD) relatively configures according to the access zone network information among the signaling flow P-Visited-Network-ID, thus judge whether the contracted user roams.Further, can pass through the form of the value of stipulations P-Visited-Network-ID, compare the user and be in which kind of roaming.The form of value such as hypothesis P-Visited-Network-ID is national brevity code. operator's sign. and domestic region code is that the content of separator just compares respectively and can distinguish concrete roaming scence with the decimal point.For example: when national brevity code is identical, operator sign is identical, and domestic region code can judge that roaming is a domestic same operator roaming in other places not simultaneously.
And, judging by ownership place S-CSCF whether the user is under the situation of roaming state, CGF carries out charging bill storage, letter sorting and/or the related processing that obtains comprehensive ticket and is specially: CGF sorts out the roaming ticket according to user's roaming information, and generates the comprehensive ticket that comprises roaming information in conjunction with the charging related network elements of belonging area network and/or the pairing ticket of charging related network elements of access zone network.
In actual applications, CGF at first wants can be according to IMS charging identifier (IMS ChargingIdentifier, be called for short ICID) and the calling and called sign is (for example, the Role of Node field of CSCF side) acting in conjunction is that the calling and called side respectively goes out a comprehensive ticket that plays each network element at same business association, be convenient to follow-up calling and called lateral areas, charging center and divide charging, CGF wants to do the good comprehensive ticket of association according to roaming information the letter sorting of roaming ticket then.
In addition, above-mentioned user is calling subscriber and/or called subscriber.
And no matter the contracted user is calling party or callee, all will judge whether roaming has taken place by detecting visited network information in the IMS network.The charge information of all network elements (comprising roaming information) is to follow Diameter by the Rf mouth to transmit ACR (request of chargeing, Accounting Request) to CDF's in the IMS network.For CGF, operations such as the ticket that CDF need be produced be deposited, association, distribution.
In addition, above-mentioned appointment network element comprise following one of at least: visit ground P-CSCF, ownership place P-CSCF, visit ground application service network element, ownership place application service network element, ownership place S-CSCF, ownership place I-CSCF, ownership place subscribed services device.
Wherein, the roaming information field of S-CSCF and AS ticket is used for roam charge, the accounting checking when the roaming information field of P-CSCF ticket is used for roam charge branch account.The roaming information field of network element I-CSCF ticket is an Optional Field, can whether increase (Oc attribute) according to the needs decision of operator.
In addition, above-mentioned roaming information is the network identification information of user's visit ground P-CSCF.And above-mentioned belonging area network identification information is pre-configured user's a belonging area network information.
This function of roaming judgement concrete position of carrying out in network can be gone to dispose according to actual needs, and the present invention provides two kinds of concrete execution modes.
Mode one, thus the roaming decision-making function is placed on the off-line roam charging method that BS carries out IMS, shown in Fig. 2 a, concrete steps comprise: step S202a, and the ownership place S-CSCF that carries out professional user receives the network information of user's visit ground P-CSCF; Step S204a, the charging related network elements of the charging related network elements of user's belonging area network and/or user's access zone network sends the request (AccountingRequest that charges to the CDF of place network separately, ACR), comprise roaming information in the ACR record that the charging related network elements produces; Step S206a, in response to the request of chargeing, CDF produces ticket, and increases roaming information corresponding to the ticket of specifying network element in ticket, and returns the response of chargeing and give relevant network element; Step S208a, CGF store, transmit, sort and merge ticket and send BS to after related; Step S210a, ownership place BS judges that according to the network information of the user's of its reception visit ground P-CSCF and user's belonging area network information whether the user is in roaming state and is in which kind of roaming state, roams the distribution and the calculating of rate.
Mode two, thereby the roaming decision-making function is placed on the off-line roam charging that ownership place S-CSCF carries out IMS, shown in Fig. 2 b, concrete steps comprise: step S202b, and the ownership place S-CSCF that carries out professional user receives the network information of user's visit ground P-CSCF; Step S204b, ownership place S-CSCF judges according to the network information of the user's of its reception visit ground P-CSCF and user's belonging area network information whether the user is in roaming state and is in which kind of roaming state; Step S206b, the charging related network elements of the charging related network elements of user's belonging area network and/or user's access zone network sends request (the Accounting Request that charges to the CDF of place network separately, ACR), comprise roaming information in the ACR record that the charging related network elements produces; Step S208b, in response to the request of chargeing, CDF produces ticket, and increases roaming information corresponding to the ticket of specifying network element in ticket, and returns the response of chargeing and give relevant network element; Step S210b, CGF stores ticket, transmits, and letter sorting sends BS after related to and roams rate and distribute and calculate with merging.
In addition, the processing that CGF charges is specially: CGF generates the comprehensive ticket that comprises roaming information according to the charging related network elements of belonging area network and/or the pairing ticket of charging related network elements of access zone network, and comprehensive ticket is sent to the charging center.
In addition, in the IMS network, session relevant (Session-Related) the still IMS business of session irrelevant (Session-Unrelated) all might relate to roaming, for example, and roaming registration (session is irrelevant) and roaming conversation (session is relevant).So in the ACR (Event) that the relevant ACR (Start/Interim/Stop ACR) of session and session have nothing to do, all need to write down roaming information, for example, the charging value is to (Accounting Value Pair, AVP), can called after Roaming Information (this AVP also can other title of called after).
As mentioned above, can carry out the judgement whether user roams, below in conjunction with concrete case description the present invention by S-CSCF or charging center.
Example 1
In this example, roaming information is transparent to BD from network element S-CSCF, and BD roams judgement afterwards, distinguishes different roaming rate accountings;
Fig. 3 schematically shows the roam charge processing procedure of this example.
As shown in Figure 3, in this example, roaming information derives from the P-Visited-Network-ID of sip message head, each network element increases the AVP corresponding to this field value when transmission charging message ACR is to CDF, for example, can transmit roaming information by called after Visited-Network-ID, also increase corresponding field among the ticket CDR, for example, Visited Network ID is transmitted roaming information to CGF, and be transparent to BD always.
Because this roaming information is the value from sip message head P-Visited-Network-ID, and P-Visited-Network-ID is a network identity of the scope of a P-CSCF administration, its value need be distributed by the Virtual network operator unification usually, at the whole network is unique, therefore, can adopt the mode of DNS to come stipulations.
Consider different roaming scences, for example, with situation such as roaming between operator's roaming in other places, National roaming, international roaming, the different operators, with its value standard is character string type UTF8String, and definition format can be following mode: country's sign. operator's sign. and the network area sign.Like this, for example, user place access is the BeiJing, China, and operator is a China Mobile, and this moment, the value of P-Visited-Network-ID just can be: CN.Chinamobile.BJ.
Continuation is with reference to Fig. 3, roaming information is from S-CSCF network element process CDF, CGF is transparent to BD, can make comparisons to judge in the business that produces this CDR whether roaming has taken place with belonging area network information at BD, if actual operation needs to increase the granularity of roam charge, can with " country sign. operator's sign. the network area sign " roaming information of this form is that separator extracts each section and does corresponding comparison with belonging area network information respectively with the decimal point, and according to country's sign different (international roaming), operator's sign different (different operators internetwork roaming), the network area sign is different, or its combination comes corresponding different roaming scences to formulate different roaming rates.
For the account sorting, charging center, each network area (such as city-level) can (for example, be reported to provincial charging center) to the upper level charging center with the account summarizing and reporting up to the charging center (for example, national charging center) of top layer.
Fig. 4 shows the schematic diagram of the tree structure of charging center.
In Fig. 4, the account sorting of roaming charges is that top-down classification is carried out, provincial retrieval is carried out according to roaming information in charging center, the whole nation, share roaming charges to each provincial charging center, in like manner provincial charging center is carried out the retrieval of city's one-level again according to roaming information, share roaming charges to the city-level charging center, top-downly like this finish sorting.
It should be noted that, judge the mode of roaming for the charging center, the content of the roaming information of transparent transmission and formal definition originate from the value of P-Visited-Network-ID, require to keep the whole network uniqueness, except top " country's sign. operator's sign. the network area sign " also allow other selection the definition mode: for example, because the sign (Inter-OperatorIdentifier of interconnection operator, IOI) be the field that the 3GPP Freight Basis has defined in ticket, so operator's sign can be obtained by this field.The form of P-Visited-Network-ID can be changed to " country sign. the network area sign " form the visit ground information that roaming is judged jointly with the IOI field then, these concrete definition all will oneself be selected to determine by each manufacturer according to practical design.
Example 2
In this example, be by of the value relatively network information judgement contracted user's of its ownership place the roaming of S-CSCF network element according to the P-Visited-Network-ID that carries in the signaling, and (for example produce roaming identity Roaming Indicator, this roaming identity can be the integer value, and do not roam by 0 expression, roam with the strange land IMS of operator by 1 expression P-CSCF network element, and other integer value kept for all the other possible roaming modes, be convenient to expansion) transmit subsequently this roaming indication information through CDF, CGF up to BD.
Judge that below in conjunction with 5 to 7 pairs of S-CSCF network elements of accompanying drawing the mode of roaming is described in further detail.
Accompanying drawing 5 has illustrated the S-CSCF network element to judge the mode of roaming, comprises following treatment step altogether:
Step S51: the belonging area network identification information of the S-CSCF of belonging area network during according to the value of the sip message head field P-Visited-Network-ID on the registration message band with from network management configuration S-CSCF network element made comparisons, and is referred to as to roam decision-making function.When both domain names are inconsistent, can judge that the contracted user is in roaming state, setting integer intermediate variable record roaming indicated value is 1, otherwise be exactly non-roaming state, intermediate variable record roaming indicated value is 0, remaining integer value is reserved the roaming scence of corresponding different grain size roaming rate, so that expansion;
Step S52:S-CSCF will roam the result who judges, promptly, the intermediate variable of record roaming indicated value is inserted the Roaming-Indicator AVP of the increase among the ACR, and (this AVP is defined as integer, 0 expression is non-roaming, 1 expression IMS roaming, all the other integer values are kept for other roaming modes, are convenient to subsequent expansion), and transmit ACR and give CDF;
Step S53:CDF is according to the ticket CDR of the ACR structure S-CSCF of this S-CSCF that receives, comprise field Roaming Indicator, type is all consistent with the AVP:Roaming-Indicator among the step S2 with value, and value is 1 expression IMS roaming, and value is 0 to be non-roaming;
The ticket polymerization that step S54:CGF finishes each business network element with related after, form the charging center that comprehensive ticket sends operator place to and carry out follow-up accounting processing, CGF also supports the comprehensive ticket that the generates CDR sorting according to roam charge sign Roaming Indicator; BD also can carry out account sorting and roam charge as the description of example 1 after receiving the CDR that CGF transmits.
Below by a specific embodiment and in conjunction with the irrelevant two kinds of situations of (Fig. 6) relevant with session (Fig. 7) of session this example is described.
Suppose following application scenarios: user A and B are signatory in Nanjing, and A is positioned at the B in Nanjing in Beijing roaming call.
Wherein, the network identity in belonging area network Nanjing is NJChinamobile.com, has some CSCF network elements, be numbered PCSCF1, SCSCF1, ICSCF1, PCSCF2, SCSCF2, ICSCF2, wherein, for simple and clear purpose, only show SCSCF1, ICSCF1 and HSS among the figure, omit all the other network elements.
And visited network Pekinese network identity is that BJChinamobile.com exists some CSCF network elements, is numbered PCSCF1, SCSCF1, ICSCF1, PCSCF2, SCSCF2, ICSCF2, wherein,, only show SCSCF1, ICSCF1 and HSS among the figure, omit all the other network elements for simple and clear purpose.
Before chargeing, the purpose of registration process is to set up a logical path between UE, visited network, home network, and this path can be used for transmitting the relevant signaling of follow-up IMS.Before initiating register requirement, must set up the IMS signaling bear of IP-CAN, and determine an available P-CSCF.The user is visible as Fig. 5 in the processing of IMS system registry for the first time.
As shown in Figure 6, irrelevant professional for session, the process that roam charge is handled according to the present invention is as follows:
601, after UE has obtained the IP connection, can carry out the IM registration, for this reason, UE sends log-on message to acting on behalf of Proxy (the IP address that has public identify, privately owned sign, home network domain name, UE in this information);
602, receive after the Register information flow, P-CSCF must check belonging area network name " home domain name ", thereby the entrance of discovery home network (promptly, I-CSCF), the agency must send Register information and flow to I-CSCF (carrying P-CSCF address, public identify, privately owned sign, P-CSCF network identity, UE IP address in this information), and the name-address resolution mechanism that sets in advance is used for determining from " home domain name " address of home network.The P-CSCF network identity is a word string, is used for the network at home network sign P-CSCF place, and there be (for example, the P-CSCF network identity may be the domain name of P-CSCF network) among the sip message head P-Visited-Network-ID in its information;
603, I-CSCF must send Cx-Query/Cx-Select-Pull information and flow to HSS (this information flow comprises public identify, privately owned sign, P-CSCF network identity).HSS must check whether the user registers.According to the signatory situation of user, and operator's restriction/constraint, HSS must be pointed out whether the user allows to register at this P-CSCF network (being identified by the P-CSCF network identity);
604, Cx-Query Resp/Cx-Select-Pull Resp sends to I-CSCF from HSS.If HSS knows, must comprise a S-CSCF name, and S-CSCF ability (can select a new S-CSCF if necessary).If in the inquiry failure of HSS, the current registration of Cx-Query Resp refusal;
605, I-CSCF uses the name of S-CSCF, by name-address resolution mechanism, and the address of decision S-CSCF.I-CSCF also may determine the name of suitable home network contact point based on the information of receiving from HSS.(comprise in this information flow and P-CSCF address/name, public identify, privately owned sign, P-CSCF network identity, UE IP address, (can comprise I-CSCF (THIG) when needing the networking configuration to hide) send to the S-CSCF that chooses, the home network contact point will be used for that signaling is initiated in session by P-CSCF and be forwarded to home network I-CSCF with register information flow subsequently;
606, S-CSCF must send Cx-Put/Cx-Pull (carrying public identify, privately owned sign, S-CSCF name) to HSS;
607, HSS is necessary for this user and preserves the S-CSCF name, and return information stream Cx-Put Resp/Cx-Pull Resp (user profile) gives S-CSCF.The user profile that is delivered to S-CSCF from HSS must comprise one or more name/address information, is used for access service controlling platform when the user is registered in this S-CSCF.The user that S-CSCF is necessary for appointment preserves information.Except name/address information, security information also can send to S-CSCF and use;
608, based on filter criteria, S-CSCF must send log-on message to professional controlling platform, and carries out the corresponding business control procedure.Simultaneously for roam charge, S-CSCF must compare according to the visited network information in the middle of the P-Visited-Network-ID of signaling flow (being BJChinamobile.com or pcscf1.BJChinamobile.com in this embodiment) and the belonging area network information (being NJChinamobile.com among this embodiment) that disposes on webmaster in advance and make roaming and judge, when both information inconsistencies, judge that the contracted user is in roaming state, setting integer intermediate variable record roaming indicated value is 1, otherwise be exactly non-roaming state, intermediate variable record roaming indicated value is 0; If operator need increase the granularity of roam charge, can select other integer value to represent different roaming scences;
609, S-CSCF must return 200 OK information flows (home network contact information) and give I-CSCF;
610, S-CSCF sends the charging request ACR of registration message to ownership place CDF, and wherein AVP can called after Roaming-Indicator, and its value is got the value of the intermediate variable of record roaming indicated value in above-mentioned 608;
611, ownership place CDF is that S-CSCF opens the irrelevant CDR of session, and its SIP Method is Register;
612, ownership place CDF returns charge response message and gives S-CSCF;
613～16.I-CSCF must send information flow 200 OK (home network contact information) and give P-CSCF, and ownership place CDF is also for I-CSCF produces a registration ticket, and I-CSCF must all log-on messages of release after sending information flow 200 OK;
617, the necessary store home network contact information of P-CSCF, concurrent carry information stream 200OK gives UE.
The polymerization on CGF of the ticket of each network element after the association, can form a comprehensive ticket, wherein contains roam charge identification information (Roaming Indicator), is convenient to sort the charging accounting processing with the subsequent charging center.
More than be the irrelevant roaming offline charging process of session, have more the practical application meaning of charging in the relevant situation of session, calling and called often have different roam charge rates in the actual operation.
As shown in Figure 7, under the situation of session related service, the roam charge process when A calls out B is as follows:
701 and 702, after user's registration, A calls out B, and SIP:Invite message is routed to the S-CSCF of belonging area network by the P-CSCF of visited network, (wherein, also needing through I-CSCF and HSS) also is carried at the visited network identification information and passes to S-CSCF among the P-Visited-Network-ID;
703, aforesaid with it registration scenarios is the same, S-CSCF when carrying out business control for roam charge, must be (in this example according to the visited network information in the middle of the P-Visited-Network-ID of signaling flow, according to hypothesis before, this network information is BJChinamobile.com or can be pcscf1.BJChinamobile.com) and the belonging area network information that on webmaster, disposes in advance (according to hypothesis before, this network information is NJChinamobile.com) compare and make the roaming judgement, when both information inconsistencies, judge that the contracted user is in roaming state, setting integer intermediate variable record roaming indicated value is 1, otherwise be exactly non-roaming state, intermediate variable record roaming indicated value is 0.If operator need increase the granularity of roam charge, can also further select other integer value to represent different roaming scences;
704 and 705, S-CSCF continues route Invite message and receives 200ok to respond laggard industry affair control;
706, S-CSCF send to call out the charging request ACR of Invite message to ownership place CDF, and wherein, this AVP can called after Roaming-Indicator, and its value is got the value of the intermediate variable of record roaming indicated value in above-mentioned 703;
707, ownership place CDF is the CDR that S-CSCF opens the relevant Invite of session;
708, ownership place CDF returns charge response message and gives S-CSCF;
709, S-CSCF returns the response message of 200ok to the P-CSCF of visited network;
710 to 713, P-CSCF returns the response message of 200ok to UE, and the CDF on visit ground is the CDR that P-CSCF opens the relevant Invite of a session.
It should be noted that, for the relevant IMS business of session, during conversing, because middle duration (Interim time) arrives or medium change meeting triggering for generating Interim/Stop ACR, same S-CSCF network element also will produce the Roaming-Indicator AVP of sign roaming state for Interim/Stop ACR outside Start ACR.
In sum, by means of technical scheme of the present invention, can realize in the IMS network that professional off-line roam charges, and guarantees benefits of operators; And, be used for the expression roaming by in the ACR of charging related network elements and CDR, increasing roaming information, can solve the problem of roaming information disappearance in the present IMS ticket, be convenient to realize roam charge again; In addition, the present invention is enhancement function on CGF, the comprehensive ticket after the association can be sorted according to roaming identity, satisfying the demand of operator to this part ticket special processing, and has made things convenient for the charging center to carry out the processing of roam charge and account sorting.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. an off-line roam charging method that is used for IP Multimedia System is characterized in that,
Comprise:
User's ownership place service call session control function entity or ownership place charging center receive roaming information;
Whether described ownership place service call session control function entity or described ownership place charging center are in roaming state according to the described roaming information of its reception and described user's the described user of belonging area network identification information judgment;
The charging related network elements of the charging related network elements of described user's belonging area network and/or described user's access zone network sends the charging request that comprises described roaming information to the charging data function entity of place network separately;
In response to described charging request, described charging data function entity produces ticket, and increases described roaming information corresponding to the ticket of specifying network element in described ticket; Charging gateway function body is carried out storage, letter sorting and/or the association of charging bill according to described ticket to described user, obtains comprehensive ticket, and described comprehensive ticket is sent to the charging center.
2. method according to claim 1 is characterized in that, before described ownership place service call session control function entity or described ownership place charging center receive described roaming information, further comprises:
Described user when described access zone network is registered, described user's access zone network is carried at described roaming information in the field of conversation initiating protocol message of registration message, and described registration message is sent to described ownership place service call session control function entity.
3. method according to claim 2 is characterized in that, is judging that by described ownership place charging center whether described user is under the situation of roaming state, further comprises:
The message that will be comprised described roaming information by described ownership place call conversation control function entity is sent to described ownership place charging center via ownership place charging data function entity in the middle of the described charging data function entity and described charging gateway function body.
4. method according to claim 1, it is characterized in that, judging by described ownership place service call session control function entity whether described user is under the situation of described roaming state, before described ownership place service call session control function entity receives described roaming information, further comprise:
Described user's visit ground proxy call conversation control function entity inserts the ownership place query call conversation control function entity that the access zone network sign sends to described user with its message that comprises described roaming information that receives from described user;
Signatory verification is inquired about and roamed to described ownership place query call conversation control function entity at described user's ownership place subscribed services device, the message that will comprise described roaming information is routed to described user's ownership place service call control function entity, finishes described user's registration.
5. method according to claim 1 is characterized in that, described ownership place service call session control function entity or described charging center judge that the processing whether described user is in described roaming state is specially:
Described user's belonging area network identification information and described roaming information are compared, be in described roaming state relatively both sides' situation inequality described user that judges; Otherwise judge that described user is not in described roaming state.
6. method according to claim 5 is characterized in that, is judging that described user is under the situation of described roaming state, further comprises:
The type of determining described user's residing roaming state according to described user's belonging area network identification information and described roaming information.
7. method according to claim 6 is characterized in that, roaming information in the described charging request and the roaming information in the described ticket be integer variable, and, be under 0 the situation, to represent that described user is not in roaming state in described integer variable; In described integer variable is under the situation of positive integer, represents that described user is in roaming state, and utilizes different positive integer value to represent the type of different roaming states respectively.
8. method according to claim 7, it is characterized in that, judged by described ownership place service call session control function entity whether described user is under the situation of roaming state, described charging gateway function body is carried out charging bill storage, letter sorting and/or the related processing that obtains described comprehensive ticket and is specially:
Described charging gateway function body sorts out the roaming ticket according to described user's roaming information, and generates the comprehensive ticket that comprises described roaming information in conjunction with the charging related network elements of described belonging area network and/or the pairing ticket of charging related network elements of described access zone network.
9. according to each described method in the claim 1 to 8, it is characterized in that described user is calling subscriber and/or called subscriber.
10. according to each described method in the claim 1 to 8, it is characterized in that, described appointment network element comprise following one of at least: visit ground proxy call conversation control function entity, home agent call conversation control function entity, visit ground application service network element, ownership place application service network element, ownership place service call session control function entity, ownership place query call conversation control function entity, ownership place subscribed services device.
11., it is characterized in that described roaming information is the network identification information of described user's visit ground proxy call conversation control function entity according to each described method in the claim 1 to 8.
12., it is characterized in that described belonging area network identification information is pre-configured described user's a belonging area network information according to each described method in the claim 1 to 8.
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Cited By (9)
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| CN102006575A (en) * | 2010-11-26 | 2011-04-06 | 中兴通讯股份有限公司 | Charging method and device of IP multimedia subsystem |
| CN102158837A (en) * | 2010-06-07 | 2011-08-17 | 华为技术有限公司 | Charging method and system and network system |
| CN103974227A (en) * | 2013-01-31 | 2014-08-06 | 中国电信股份有限公司 | Method, device and system for inquiring QoS (quality of service) contracting information |
| CN105306408A (en) * | 2014-05-30 | 2016-02-03 | 中国电信股份有限公司 | Proxy-call session control function and telephone bill generation method and system thereof |
| WO2017101443A1 (en) * | 2015-12-16 | 2017-06-22 | 中兴通讯股份有限公司 | Method and device for charging processing and charging system |
| CN111212394A (en) * | 2020-01-15 | 2020-05-29 | 深圳震有科技股份有限公司 | Roaming charging method, system and storage medium |
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| CN100407850C (en) * | 2004-03-24 | 2008-07-30 | 华为技术有限公司 | Method for realizing charge metering of boundary roaming |
| CN100496153C (en) * | 2004-09-09 | 2009-06-03 | 华为技术有限公司 | Roam charge method of called user by laminated type prepayment |
| US7599478B2 (en) * | 2004-11-30 | 2009-10-06 | Alcatel-Lucent Usa Inc. | IMS gateway systems and methods for online charging in IMS networks |
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| CN103974227A (en) * | 2013-01-31 | 2014-08-06 | 中国电信股份有限公司 | Method, device and system for inquiring QoS (quality of service) contracting information |
| CN105306408A (en) * | 2014-05-30 | 2016-02-03 | 中国电信股份有限公司 | Proxy-call session control function and telephone bill generation method and system thereof |
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| CN111800777A (en) * | 2019-04-08 | 2020-10-20 | 华为技术有限公司 | Roaming data processing method, device and system |
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| CN111212394A (en) * | 2020-01-15 | 2020-05-29 | 深圳震有科技股份有限公司 | Roaming charging method, system and storage medium |
| CN115086895A (en) * | 2021-03-11 | 2022-09-20 | 中国电信股份有限公司 | Method and system for distinguishing abnormal provincial call ticket and abnormal roaming call ticket |
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