CN106332037A - IP Multimedia Subsystem Billing Method and Device - Google Patents

Abstract

The invention discloses an IP multimedia subsystem billing method and device. The method includes the following steps that: when billing is carried out, the billing priorities of IP multimedia subsystem network elements are set; after services are initiated, IP multimedia subsystem network elements which process the services determine target IP multimedia subsystem network elements with the highest billing priorities; and billing is carried out for the services according to billing request messages sent by the determined target IP multimedia subsystem network elements. According to the method of the invention, after the after services are initiated, the IP multimedia subsystem network elements which process the services determine the network elements with the highest billing priorities according to the billing priorities of the IP multimedia subsystem network elements by means of negotiation and comparison, billing can be completed according to the billing request messages of the IP multimedia subsystem network elements with the highest priorities, and the billing request messages of all the network elements are not needed to be received, and processing such as merging is not required to be performed on the billing request messages of all the network elements, and therefore, the workload of processing can be decreased, the redundancy of information transmission can be reduced, the occupancy rate of transmission resources can be reduced, and the problem of poor real-time performance caused by the delay of other network elements can be solved.

Description

IP Multimedia Subsystem Billing Method and Device

technical field

The present invention relates to the communication field, in particular to an IP Multimedia Subsystem (IP Multimedia Subsystem, IMS for short) charging method and device.

Background technique

In the telecommunication network described by 3GPP, the charging system is one of its important functional components, and its offline charging model is shown in Figure 1. As can be seen from Figure 1, for offline charging, all IMS network elements support the offline charging interface (Figure 1 only illustrates some network elements relevant to the present invention, and does not list all network elements. Complete offline For charging model, please refer to 3GPP TS32.240). These offline charging network elements include: access gateway control function (Access Gateway Control Function, referred to as AGCF), proxy session control function (Proxy-Call Session Control Function, referred to as P-CSCF), control layer service session Server-Call Session Control Function (S-CSCF for short), Interrogation-Call Session Control Function (I-CSCF for short), Media Gateway Control Function (MGCF for short), service Layer session initialization protocol application server (Session Initial Protocol Application Server, referred to as SIP AS) and so on.

For the above-mentioned network elements, the access layer is responsible for the access of various types of users, and realizes the terminal independence of the access users; the control layer is used to control the session routing, including the selection of the next hop, which SIP AS to trigger, etc. . The business layer handles the services signed by the user, such as caller ID, call forwarding, intelligent services, and so on.

In the IMS domain, for a session (session), all network elements that have processed the session will generate accounting messages, that is, accounting request messages (Accounting Request, ACR for short). These ACRs are sent to the Charging Collecting Function (CCF for short), and the CCF generates a Call Data Record (CDR for short), which is sent to the Billing Domain (BD for short) to complete the final billing.

As for the service layer, due to the complexity and diversity of telecommunication services, multiple different SIP ASs need to be set up to realize it. For example, a SIP AS implements basic supplementary services (caller ID, call barring, etc.), a SIP AS implements virtual private network services (Centrex), and a SIP AS implements intelligent services, etc. as shown in picture 2. In FIG. 2 , the triggering sequence and flow of multiple SIP ASs are illustrated, and the triggering sequence and route selection are controlled by network elements at the control layer. In this example process, there are three SIP ASs in total, 1, 2, and 3 are the destination process of the signaling message, or called the origination process. 4, 5, and 6 are the return process, or called the receiving end process. All three SIP ASs in this example will send accounting messages to the CCF.

A detailed billing process is shown in Figure 3. From the perspective of the whole process, the whole conversation can be divided into three stages. In phase one, the user initiates a session, the network reserves resources for the user, and media negotiation is performed between terminals. In phase two, the user enters the call state, and the charging session starts. In this phase, the network element continuously sends ACRs to the CCF, namely: a Start ACR is used to identify the start of the charging session, zero or more Interim ACRs are used to identify resource changes during the session, and a Stop ACR is used to Indicates that the session is over. Phase 3, reclaiming the configured network resources, etc.

The current charging process sends the ACR generated by each network element to the CCF. The CCF generates different CDRs for each network element respectively. Then the CCF or BD merges the CDRs related to the same session into a comprehensive CDR for billing; this processing method involves a large workload of merging, and there is a lot of redundancy in the billing information transmitted by different network elements. Unnecessary transmission waste is caused, and the timeliness of bill merging processing is also affected when a certain network element transmits delay.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a billing method and device for an IP multimedia subsystem to solve the problems of large billing workload, large resource occupation and poor timeliness of the existing IP multimedia subsystem.

In order to solve the above-mentioned technical problem, the present invention provides a kind of IP multimedia subsystem billing method, comprising:

Set the charging priority of IP multimedia subsystem network elements;

After the service is initiated, determine the target IP multimedia subsystem network element with the highest charging priority through the network elements of the IP multimedia subsystem processing the service;

The service is charged according to the charging request message sent by the network element of the target IP multimedia subsystem.

In one embodiment of the present invention, the target IP multimedia subsystem network element with the highest charging priority determined by each IP multimedia subsystem network element processing this service includes:

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with charging priority information;

or,

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with the charging priority information.

In one embodiment of the present invention, when each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with the charging priority information, it includes:

The first IP multimedia subsystem network element that processes the service adds its own charging priority to the service request message and sends it to the next IP multimedia subsystem network element; the next IP multimedia subsystem network element judges the received Whether the charging priority in the service request message is higher than its own, if so, it will not be replaced and sent to the next IP multimedia subsystem network element, otherwise, it will be replaced and then sent to the next IP multimedia subsystem network element, so as to By analogy, when the last IP multimedia subsystem network element judges that the charging priority in the received service request message is higher than its own, it takes the charging priority in the service request message as the highest charging priority; Its own as the highest charging priority;

Notify the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element.

In one embodiment of the present invention, when each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with charging priority information, it includes:

The first IP multimedia subsystem network element that receives the service of the service request response message fed back by the opposite end adds its own charging priority to the service request response message and sends it to the next IP multimedia subsystem network element; The IP multimedia subsystem network element judges whether the charging priority in the received service request response message is higher than its own, if so, it will not replace it and send it to the next IP multimedia subsystem network element, otherwise, it will send it to the next IP multimedia subsystem network element after replacement The next IP multimedia subsystem network element, and so on, when the last IP multimedia subsystem network element judges that the charging priority in the service request response message received is higher than its own, it will use the charging priority in the service request response message charging priority as the highest charging priority, otherwise, take its own as the highest charging priority;

Notify the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element.

In an embodiment of the present invention, notifying the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element includes:

After receiving the service request response message fed back by the opposite end, the last IP multimedia subsystem network element adds the highest charging priority to the service request response message and sends it to the following IP multimedia subsystem network elements in sequence , when the following IP multimedia subsystem network element judges that the charging priority contained in the received service request response message is the same as its own charging priority, it marks itself as the target IP multimedia subsystem network element.

In an embodiment of the present invention, charging this service according to the charging request message sent by the network element of the target IP multimedia subsystem includes:

receiving a charging request message sent by a target IP multimedia subsystem network element, where the charging request message includes target IP multimedia subsystem network element identification information;

generating a charging bill according to the charging request message;

Complete charging according to the billing bill.

In order to solve the above problems, the present invention also provides an IP multimedia subsystem charging system, including: IP multimedia subsystem network elements and charging devices;

The network element of the IP multimedia subsystem is set with a charging priority;

After the service is initiated, each IP multimedia subsystem network element processing this service is used to determine the target IP multimedia subsystem network element with the highest charging priority;

The charging device is used for charging this service according to the charging request message sent by the network element of the target IP multimedia subsystem.

In one embodiment of the present invention, each IP multimedia subsystem network element processing this service determines that the target IP multimedia subsystem network element with the highest charging priority includes:

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with charging priority information;

or,

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with the charging priority information.

In one embodiment of the present invention, when each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with the charging priority information, it includes:

The first IP multimedia subsystem network element that processes the service adds its own charging priority to the service request message and sends it to the next IP multimedia subsystem network element; the next IP multimedia subsystem network element judges the received Whether the charging priority in the service request message is higher than its own, if so, it will not be replaced and sent to the next IP multimedia subsystem network element, otherwise, it will be replaced and then sent to the next IP multimedia subsystem network element, so as to By analogy, when the last IP multimedia subsystem network element judges that the charging priority in the received service request message is higher than its own, it takes the charging priority in the service request message as the highest charging priority; its own as the highest charging priority, and notify the IP Multimedia Subsystem network element corresponding to the highest charging priority as the target IP Multimedia Subsystem network element.

In one embodiment of the present invention, when each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with charging priority information, it includes:

The first IP multimedia subsystem network element that receives the service of the service request response message fed back by the opposite end adds its own charging priority to the service request response message and sends it to the next IP multimedia subsystem network element; The IP multimedia subsystem network element judges whether the charging priority in the received service request response message is higher than its own, if so, it will not replace it and send it to the next IP multimedia subsystem network element, otherwise, it will send it to the next IP multimedia subsystem network element after replacement The next IP multimedia subsystem network element, and so on, when the last IP multimedia subsystem network element judges that the charging priority in the service request response message received is higher than its own, it will use the charging priority in the service request response message If not, take its own as the highest charging priority, and notify the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element.

In an embodiment of the present invention, notifying the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element includes:

After receiving the service request response message fed back by the opposite end, the last IP multimedia subsystem network element adds the highest charging priority to the service request response message and sends it to the following IP multimedia subsystem network elements in sequence , when the following IP multimedia subsystem network element judges that the charging priority contained in the received service request response message is the same as its own charging priority, it marks itself as the target IP multimedia subsystem network element.

In an embodiment of the present invention, the billing device includes a billing collection function device and a billing domain device;

The charging collection function device receives the charging request message sent by the target IP multimedia subsystem network element, and generates a charging bill according to the charging request message; the charging request message includes the target IP multimedia subsystem network element identifier information;

The charging domain device completes charging according to the charging bill.

The beneficial effects of the present invention are:

The IP multimedia subsystem charging method and device provided by the present invention set the charging priority of IP multimedia subsystem network elements during charging; after the service is initiated, each IP multimedia subsystem network element that processes this service Determine the target IP multimedia subsystem network element with the highest charging priority, and then charge this service according to the charging request message sent by the determined target IP multimedia subsystem network element; that is, the present invention can be used in the When the service is initiated, the network elements of the IP multimedia subsystem that handle the service can negotiate and compare the network element with the highest priority according to the charging priority set by themselves, and the network element with the highest priority can be used as the service Different and dynamic changes; then complete the charging according to the charging request message of the determined network element with the highest priority, and do not need to receive the charging request messages of all network elements for merging and other processing, so the processing workload can be reduced, and at the same time It can reduce the redundancy of information transmission, reduce the occupancy rate of transmission resources, and minimize the problem of poor real-time billing caused by transmission delays of other network elements.

Description of drawings

FIG. 1 is a schematic structural diagram of an offline billing system;

Fig. 2 is a schematic diagram of the billing process when multiple session initialization protocol application servers coexist;

Fig. 3 is a schematic diagram of the billing process of the session process;

FIG. 4 is a schematic flow chart of an IP multimedia subsystem charging method provided by Embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of an IP multimedia subsystem charging system provided by Embodiment 2 of the present invention;

FIG. 6 is a schematic flowchart of a charging method for an IP multimedia subsystem provided in Embodiment 3 of the present invention.

detailed description

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

Embodiment one:

Referring to Fig. 4, the IP multimedia subsystem charging method provided in this embodiment includes:

Step 401: Set the charging priority of IP multimedia subsystem network elements; specifically, each IP multimedia subsystem network element can be numbered for charging priority, and the numbers of different IP multimedia subsystem network elements are generally different. If If they are the same, it indicates that the charging priorities of the two are the same; the priority number in this embodiment can be a number, and in order to facilitate subsequent updates, such as deletion, addition, modification, etc., the priority number can not be more continuous, such as setting in sequence 1, 2, 10, 14, 21; the larger or smaller the number, the higher the priority;

It should be noted that the IP multimedia subsystem network element in this embodiment is not limited to the SIP AS, but includes all IP multimedia subsystem network elements. In practical applications, in most cases, only the SIP AS call list may be selected as the Billing basis, but sometimes other network elements are needed, such as private branch exchange (PBX for short) peer-to-peer access, need to use MGCF bills for billing;

Step 402: after the service is initiated, determine the target IP multimedia subsystem network element with the highest charging priority through each IP multimedia subsystem network element processing this service;

Step 403: Charge this service according to the charging request message sent by the network element of the target IP multimedia subsystem.

From the above processing flow, it can be seen that when a service (including but not limited to a session) is initiated, each IP multimedia subsystem network element processing this service can negotiate and compare the priority according to the charging priority set by itself The network element with the highest priority, and the network element with the highest priority can change dynamically with different services; then complete the charging according to the charging request message of the determined network element with the highest priority, and does not need to receive all network elements Merging and other processing of the billing request messages can reduce the processing workload while reducing the redundancy of information transmission, improve resource utilization, and minimize the problem of poor real-time billing caused by transmission delays of other network elements.

In the above step 402, the target IP multimedia subsystem network element with the highest charging priority determined by each IP multimedia subsystem network element processing this service includes:

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with charging priority information;

or,

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with the charging priority information.

When each IP multimedia subsystem network element uses the service request message added with charging priority information to determine the target IP multimedia subsystem network element with the highest charging priority, it includes:

The first IP multimedia subsystem network element (that is, the first network element to send a service request message) to process the service adds its own charging priority to the service request message and sends it to the next IP multimedia subsystem network element; After receiving it, the next IP multimedia subsystem network element judges whether the charging priority in the received service request message is higher than its own charging priority, and if so, sends it to the next IP multimedia subsystem network element without replacement , otherwise, replace it and then send it to the next IP Multimedia Subsystem NE, and so on. After the last IP Multimedia Subsystem NE receives the service request message, it judges that the charging priority When the priority is higher than its own, save the charging priority in the service request message as the highest charging priority on the local end, otherwise, save its own as the highest charging priority on the local end; then notify the highest charging priority The IP multimedia subsystem network element corresponding to the priority is used as the target IP multimedia subsystem network element. The way of notification here can additionally use new messages for notification; but in order to further improve resource utilization and reduce overhead; in this embodiment, business request response messages are used for notification, specifically:

The last IP multimedia subsystem network element that receives the service request message will be the first to receive the service request response message fed back by the opposite end, and then add the highest charging priority to the service request response message, and then forward to the following IP When the multimedia subsystem network element sends it, the following IP multimedia subsystem network element judges that the charging priority contained in the received service request response message is the same as its own charging priority, indicating that its own charging priority is the highest , mark itself as the target IP multimedia subsystem network element; otherwise, indicate that the priority of itself is not the highest.

When each IP multimedia subsystem network element uses the service request response message added with charging priority information to determine the target IP multimedia subsystem network element with the highest charging priority, it includes:

The first IP multimedia subsystem network element that receives the service of the service request response message fed back by the opposite end adds its own charging priority to the service request response message and sends it to the next IP multimedia subsystem network element; The IP multimedia subsystem network element judges whether the charging priority in the received service request response message is higher than its own, if so, it will not replace it and send it to the next IP multimedia subsystem network element, otherwise, it will send it to the next IP multimedia subsystem network element after replacement The next IP multimedia subsystem network element, and so on, when the last IP multimedia subsystem network element judges that the charging priority in the service request response message received is higher than its own, it will use the charging priority in the service request response message The charging priority is taken as the highest charging priority, otherwise, it is taken as the highest charging priority; and then the IP multimedia subsystem network element corresponding to the highest charging priority is notified as the target IP multimedia subsystem network element. The way of notification can be by adding a dedicated message for notification.

In this embodiment, the manner in which the network element of the IP multimedia subsystem adds its own charging priority to the service request message or the service request response message may be by extending the existing signaling parameters (such as P-Charging of SIP signaling), Or add a new signaling parameter, and for the convenience of subsequent identification and description, this parameter can be set as charging priority.

In the above step 403, charging this service according to the charging request message sent by the network element of the target IP multimedia subsystem includes:

Receive the charging request message sent by the network element of the target IP multimedia subsystem, the charging request message includes the identification information of the network element of the target IP multimedia subsystem, so as to distinguish whether it is sent by the network element of the target IP multimedia subsystem; When it is determined that only the target IP multimedia subsystem network element sends the charging request message, then the identification information may not be included; the increase of the identification information may be extended (for example, adding a new AVP, Attribute Value Pair, and attribute pair in the Diameter message) )accomplish. For convenience, it is assumed that the identification information is charging anchor; in this embodiment, the charging request message sent by other IP multimedia subsystem network elements can be discarded or performed for other backup processing, etc., but it is not transmitted downward;

Generate a charging bill according to the charging request message sent by the network element of the target IP multimedia subsystem;

In this embodiment, when the billing bills of all IP multimedia subsystem network elements are also sent to the billing center for processing, the billing bills for the target IP multimedia subsystem network elements in the embodiment may also include the target IP multimedia subsystem network element identification information for the billing center to sort out the billing bills of the target IP multimedia subsystem network elements from numerous billing bills;

Further complete charging according to the billing bill.

It can be seen that in this embodiment, the election and confirmation of charging priority can be completed through one signaling interaction, and the existing process can be used for simple expansion without adding a new message process;

The CCF can choose to only transmit the bills sent by the network element with the highest charging priority to the BD, which can effectively reduce the network load.

Embodiment two:

This embodiment provides an IP multimedia subsystem charging system, as shown in FIG. 5 , including a charging device and a plurality of IP multimedia subsystem network elements, and the IP multimedia subsystem network elements are provided with charging priorities; The IP multimedia subsystem network element in the embodiment is not limited to the SIP AS, but includes all IP multimedia subsystem network elements.

After the service is initiated, each IP multimedia subsystem network element processing this service is used to determine the target IP multimedia subsystem network element with the highest charging priority;

The charging device is used for charging this service according to the charging request message sent by the network element of the target IP multimedia subsystem.

In this embodiment, each IP multimedia subsystem network element processing this service determines that the target IP multimedia subsystem network element with the highest charging priority includes:

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with charging priority information;

or,

Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with the charging priority information.

When each IP multimedia subsystem network element uses the service request message added with charging priority information to determine the target IP multimedia subsystem network element with the highest charging priority, it includes:

The first IP multimedia subsystem network element (that is, the first network element to send a service request message) to process the service adds its own charging priority to the service request message and sends it to the next IP multimedia subsystem network element; After receiving it, the next IP multimedia subsystem network element judges whether the charging priority in the received service request message is higher than its own charging priority, and if so, sends it to the next IP multimedia subsystem network element without replacement , otherwise, replace it and then send it to the next IP Multimedia Subsystem NE, and so on. After the last IP Multimedia Subsystem NE receives the service request message, it judges that the charging priority When the priority is higher than its own, save the charging priority in the service request message as the highest charging priority on the local end, otherwise, save its own as the highest charging priority on the local end; then notify the highest charging priority The IP multimedia subsystem network element corresponding to the priority is used as the target IP multimedia subsystem network element. The way of notification here can additionally use new messages for notification; but in order to further improve resource utilization and reduce overhead; in this embodiment, business request response messages are used for notification, specifically:

The last IP multimedia subsystem network element that receives the service request message will be the first to receive the service request response message fed back by the opposite end, and then add the highest charging priority to the service request response message, and then forward to the following IP When the multimedia subsystem network element sends it, the following IP multimedia subsystem network element judges that the charging priority contained in the received service request response message is the same as its own charging priority, indicating that its own charging priority is the highest , mark itself as the target IP multimedia subsystem network element; otherwise, indicate that the priority of itself is not the highest.

When each IP multimedia subsystem network element uses the service request response message added with charging priority information to determine the target IP multimedia subsystem network element with the highest charging priority, it includes:

The first IP multimedia subsystem network element that receives the service of the service request response message fed back by the opposite end adds its own charging priority to the service request response message and sends it to the next IP multimedia subsystem network element; The IP multimedia subsystem network element judges whether the charging priority in the received service request response message is higher than its own, if so, it will not replace it and send it to the next IP multimedia subsystem network element, otherwise, it will send it to the next IP multimedia subsystem network element after replacement The next IP multimedia subsystem network element, and so on, when the last IP multimedia subsystem network element judges that the charging priority in the service request response message received is higher than its own, it will use the charging priority in the service request response message The charging priority is taken as the highest charging priority, otherwise, it is taken as the highest charging priority; and then the IP multimedia subsystem network element corresponding to the highest charging priority is notified as the target IP multimedia subsystem network element. The way of notification can be by adding a dedicated message for notification.

In this embodiment, the manner in which the network element of the IP multimedia subsystem adds its own charging priority to the service request message or the service request response message may be by extending the existing signaling parameters (such as P-Charging of SIP signaling), Or add a new signaling parameter, and for the convenience of subsequent identification and description, this parameter can be set as charging priority.

The billing device in this embodiment may specifically include billing collection function devices and billing domain devices;

The billing collection function device receives the billing request message sent by the target IP multimedia subsystem network element, and generates a billing bill according to the billing request message; the billing request message contains the target IP multimedia subsystem network element identification information; in order to facilitate billing The collection function device distinguishes whether it is sent by the network element of the target IP multimedia subsystem; of course, when it is set that only the network element of the target IP multimedia subsystem sends the charging request message, the identification information may not be included; the increase of the identification information can be made through Extension (for example, adding a new AVP, Attribute Value Pair, attribute pair in the Diameter message) implementation. For the sake of convenience, it is assumed that the identification information is charging anchor; in this embodiment, the charging request message sent by other IP multimedia subsystem network elements can be discarded or other backup processing can be performed, but it is not transmitted downward to the charging domain device;

The billing domain device completes billing according to the billing bill obtained by the billing collection function device.

Embodiment three:

In order to better understand the present invention, the present invention will be further described by taking the conversation service as an example and the calling side as an example; the billing process of the called side is similar, and will not be repeated here. See Figure 6, including:

Step S01: A user initiates a service, and network element 1 receives a service request message (such as a SIP Invite), and adds its own charging priority parameter, charging priority, to the charging request message;

Step S02: The service request message is sent to the second network element 2, and the network element 2 compares its own priority parameters according to the charging priority parameters carried in the message, and uses its own charging priority if its own priority is higher The priority overrides the corresponding parameters in the request message. If the priority is low, it will not be processed;

Step S03: The service request message is sent to subsequent network elements. Subsequent network elements are processed in the manner of step S02; if there are multiple subsequent network elements, they are all processed in this manner;

Step S04: After processing the service request message at the local side, the request message is sent to the peer network (such as the called side). When the message is transmitted to the peer network, the final highest charging priority parameter (charging priority) is removed from the request message and cached locally (because the mobile network maintains an independent context for all parties participating in the session, it does not Interleaved with each other. It is meaningless to pass the charging priority parameters of the calling side to the called side; especially, when the opposite end is another operator, it is not necessary);

Step S05: After the service request message is processed by the peer end, the peer end sends a response message (such as SIP 183, or SIP 200OK) and enters the local network. Since the message is returned by the original route, the local end is the first to process the returned message The network element needs to find the context corresponding to this session, and add the corresponding highest charging priority parameter (charging priority) to the response message; at the same time, if the charging priority parameter is consistent with the priority configured on this node, the local The node is the highest charging priority node for this session;

Step S06: The response message is sent to the next network element node; the network element node also compares the charging priority parameter in the response message with the priority configured by the node; if the two are the same, the node is the current The highest charging priority node for the session;

Step S07: The response messages are processed sequentially until the last network element 1 on the local side; in this way, after the interaction of a request message and a response message, the node with the highest charging priority among the local network elements can be decided;

Step S08: The user enters the call state; all relevant network elements at the local end send the charging ACR to the charging collection function device CCF. Only the charging message sent by the node with the highest charging priority carries the charginganchor parameter;

Step S09: CCF processes the billing ACR; for the ACR that carries the charging anchor parameter, it is normally constructed as a CDR; for the ACR that does not carry the parameter, it is specially processed, discarded or stored in a special directory for future checking; of course, it can also be Construct the bills of all network elements as CDRs, regardless of whether they carry charging anchors;

Step S10: CCF sends the completed CDR to the billing domain device BD for subsequent processing; if all bills are constructed into CDRs in step S09, then BD needs to sort out the bills that need to be billed according to charginganchor, and other Save the call list for future reference.

In summary, with the method of the present invention, when there are multiple SIP ASs in the IMS network, the charging network element can be automatically and accurately determined according to the priority, and when the SIP AS is added, deleted or adjusted, it can learn independently and adapt to the new priority. level, simplify the billing process, greatly improve billing efficiency, and provide guarantee for the rapid deployment of new services. Thus, operators can quickly launch new services and occupy new markets.

The above content is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (12)

1. A charging method for IP multimedia subsystem, characterized in that, comprising: Set the charging priority of IP multimedia subsystem network elements; After the service is initiated, determine the target IP multimedia subsystem network element with the highest charging priority through the network elements of the IP multimedia subsystem processing the service; The service is charged according to the charging request message sent by the network element of the target IP multimedia subsystem. 2. IP multimedia subsystem billing method as claimed in claim 1 is characterized in that, by processing each IP multimedia subsystem network element of this business, it is determined that the target IP multimedia subsystem network element with the highest charging priority includes : Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with charging priority information; or, Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with the charging priority information. 3. IP multimedia subsystem charging method as claimed in claim 2 is characterized in that, each IP multimedia subsystem network element utilizes the service request message that is added with charging priority information to determine the target IP address with the highest charging priority For network elements of the multimedia subsystem, it includes: The first IP multimedia subsystem network element that processes the service adds its own charging priority to the service request message and sends it to the next IP multimedia subsystem network element; the next IP multimedia subsystem network element judges the received Whether the charging priority in the service request message is higher than its own, if so, it will not be replaced and sent to the next IP multimedia subsystem network element, otherwise, it will be replaced and then sent to the next IP multimedia subsystem network element, so as to By analogy, when the last IP multimedia subsystem network element judges that the charging priority in the received service request message is higher than its own, it takes the charging priority in the service request message as the highest charging priority; Its own as the highest charging priority; Notify the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element. 4. The IP multimedia subsystem charging method according to claim 2, wherein each IP multimedia subsystem network element determines the target with the highest charging priority by using the service request response message added with the charging priority information IP multimedia subsystem network elements include: The first IP multimedia subsystem network element that receives the service of the service request response message fed back by the opposite end adds its own charging priority to the service request response message and sends it to the next IP multimedia subsystem network element; The IP multimedia subsystem network element judges whether the charging priority in the received service request response message is higher than its own, if so, it will not replace it and send it to the next IP multimedia subsystem network element, otherwise, it will send it to the next IP multimedia subsystem network element after replacement The next IP multimedia subsystem network element, and so on, when the last IP multimedia subsystem network element judges that the charging priority in the service request response message received is higher than its own, it will use the charging priority in the service request response message charging priority as the highest charging priority, otherwise, take its own as the highest charging priority; Notify the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element. 5. IP Multimedia Subsystem charging method as claimed in claim 3 is characterized in that, notifying the IP Multimedia Subsystem network element corresponding to the highest charging priority as the target IP Multimedia Subsystem network element comprises: After receiving the service request response message fed back by the opposite end, the last IP multimedia subsystem network element adds the highest charging priority to the service request response message and sends it to the following IP multimedia subsystem network elements in sequence , when the following IP multimedia subsystem network element judges that the charging priority contained in the received service request response message is the same as its own charging priority, it marks itself as the target IP multimedia subsystem network element. 6. The IP Multimedia Subsystem charging method according to any one of claims 1-5, wherein charging the service according to the charging request message sent by the target IP Multimedia Subsystem network element comprises : receiving a charging request message sent by a target IP multimedia subsystem network element, where the charging request message includes target IP multimedia subsystem network element identification information; generating a charging bill according to the charging request message; Complete charging according to the billing bill. 7. An IP multimedia subsystem billing system, characterized in that it comprises: an IP multimedia subsystem network element and a billing device; The network element of the IP multimedia subsystem is set with a charging priority; After the service is initiated, each IP multimedia subsystem network element processing this service is used to determine the target IP multimedia subsystem network element with the highest charging priority; The charging device is used for charging this service according to the charging request message sent by the network element of the target IP multimedia subsystem. 8. IP multimedia subsystem billing system as claimed in claim 7, is characterized in that, each IP multimedia subsystem network element that processes this business determines that the target IP multimedia subsystem network element with the highest charging priority includes: Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request message added with charging priority information; or, Each IP multimedia subsystem network element determines the target IP multimedia subsystem network element with the highest charging priority by using the service request response message added with the charging priority information. 9. The IP multimedia subsystem charging system as claimed in claim 8, wherein each IP multimedia subsystem network element determines the target IP address with the highest charging priority by using the service request message added with the charging priority information. For network elements of the multimedia subsystem, it includes: The first IP multimedia subsystem network element that processes the service adds its own charging priority to the service request message and sends it to the next IP multimedia subsystem network element; the next IP multimedia subsystem network element judges the received Whether the charging priority in the service request message is higher than its own, if so, it will not be replaced and sent to the next IP multimedia subsystem network element, otherwise, it will be replaced and then sent to the next IP multimedia subsystem network element, so as to By analogy, when the last IP multimedia subsystem network element judges that the charging priority in the received service request message is higher than its own, it takes the charging priority in the service request message as the highest charging priority; its own as the highest charging priority, and notify the IP Multimedia Subsystem network element corresponding to the highest charging priority as the target IP Multimedia Subsystem network element. 10. The IP multimedia subsystem charging system according to claim 8, wherein each IP multimedia subsystem network element determines the target with the highest charging priority by using the service request response message added with charging priority information IP multimedia subsystem network elements include: The first IP multimedia subsystem network element that receives the service of the service request response message fed back by the opposite end adds its own charging priority to the service request response message and sends it to the next IP multimedia subsystem network element; The IP multimedia subsystem network element judges whether the charging priority in the received service request response message is higher than its own, if so, it will not replace it and send it to the next IP multimedia subsystem network element, otherwise, it will send it to the next IP multimedia subsystem network element after replacement The next IP multimedia subsystem network element, and so on, when the last IP multimedia subsystem network element judges that the charging priority in the service request response message received is higher than its own, it will use the charging priority in the service request response message If not, take its own as the highest charging priority, and notify the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element. 11. IP multimedia subsystem billing system as claimed in claim 9 is characterized in that, notifying the IP multimedia subsystem network element corresponding to the highest charging priority as the target IP multimedia subsystem network element comprises: After receiving the service request response message fed back by the opposite end, the last IP multimedia subsystem network element adds the highest charging priority to the service request response message and sends it to the following IP multimedia subsystem network elements in sequence , when the following IP multimedia subsystem network element judges that the charging priority contained in the received service request response message is the same as its own charging priority, it marks itself as the target IP multimedia subsystem network element. 12. IP multimedia subsystem charging system as described in any one of claim 7-11, is characterized in that, described charging device comprises charging collection function equipment and charging domain equipment; The charging collection function device receives the charging request message sent by the target IP multimedia subsystem network element, and generates a charging bill according to the charging request message; the charging request message includes the target IP multimedia subsystem network element identifier information; The charging domain device completes charging according to the charging bill.