WO2008138234A1

WO2008138234A1 - An implementing method for immediately displaying telephone rate, terminal, switch apparatus and application server

Info

Publication number: WO2008138234A1
Application number: PCT/CN2008/070094
Authority: WO
Inventors: Haihua Hu; Hongjin Yuan
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-05-09
Filing date: 2008-01-11
Publication date: 2008-11-20
Also published as: CN101304458A; CN101304458B

Abstract

An implementing method for immediately displaying telephone rate in communication field, includes: after a call is established in a next generation network, a terminal sending a telephone rate immediately displaying request message of the call to a soft switch, and the soft switch forwarding the telephone rate immediately displaying request message to an application server (10); after the call is end, the application server sending down the result information of accounting the call to the soft switch, and the soft switch sending down the accounting result information to the terminal (20); the terminal analyzing and displaying the received accounting result information (30). The invention can avoid additional signaling overhead between the NGN terminal and the NGN AS, and reduce processing loads of the NGN terminal and the NGN AS.

Description

Telephone fee realization method, terminal, switching device and application server

The present invention relates to the field of communications, and in particular, to a method for implementing a fee-based display, and a corresponding terminal, a switching device, and an application server. Background technique

Next Generation Network (NGN), circuit switched public switched telephone network (PSTN), public land mobile network (PLMN), circuit-switched networks, and packet-based The products of the exchanged IP network for convergence, and currently integrated services such as voice, video and data have been carried out in the NGN network. The NGN network supports a variety of services by using a unified IP/Multi-Protocol Label Switching (MPLS) bearer network with QoS (Quality of Service) capability. The core network components have packet switching control. The softswitch of capability, whose call control protocol is Session Initiation Protocol (SIP). The NGN network accesses the traditional circuit-switched network through the signaling gateway and the relay gateway to implement voice communication.

As shown in FIG. 1 , it is a structural block diagram of a network system for implementing an existing NGN terminal call fee display, wherein the NGN terminal (such as NGN terminal 1 and NGN terminal 2 in the figure) directly passes the private protocol and the NGN application server (AS, Application). Server) for message interaction. The NGN terminal needs to register with the NGN AS first before the call, and keeps the heartbeat handshake message with the NGN AS during the call setup, and needs to log out to the NGN AS after the call ends.

As shown in FIG. 2, a schematic diagram of a process for implementing NGN terminal call fee display on the network system shown in FIG. 1 , wherein after the call is established, the NGN terminal sends a call fee to the NGNAS through a communication link established based on the private protocol. a request message, where the request message carries the calling user, the called user information, and the call identification information thereof (step 1); after the call is terminated, the NGN AS performs the billing and billing process for the call call, and then passes the The communication link established between the terminals feeds back the call to the NGN terminal Qi Zhi, the feedback call log includes call identification, calling user information, called user information, call start time, call duration and call charge information (step 2); the NGN terminal will receive the call log. The included information analysis display can achieve the purpose of the call fee.

However, the inventor of the present application finds that according to the above-mentioned processing method of the NGN terminal call fee, the communication link established by the NGN terminal based on the private protocol is required to register with the NGN AS before the call, and always with the NGN AS during the call setup. The heartbeat handshake message is maintained, and the logout process is performed on the NGNAS after the call is terminated. This inevitably leads to additional overhead of the signaling link between the NGN terminal and the NGN AS, and also increases the processing load of the NGN terminal and the NGN AS. Summary of the invention

The embodiment of the present invention provides a method for implementing a call fee display to avoid additional signaling overhead between the NGN terminal and the NGN AS, and reduce the processing load of the NGN terminal and the NGN AS.

Correspondingly, an embodiment of the present invention further provides an NGN-based terminal, a switching device, and an application server thereof.

The embodiment of the present invention provides a method for implementing a call fee display, including the steps of: in a next-generation network, after the call is established, the terminal sends a call request message to the switching device, where the switching device will The billing request message is forwarded to the application server; the application server delivers the result information of the billing process to the switching device, and the switching device sends the billing result information to the terminal; The terminal parses and displays the received charging result information.

Correspondingly, the embodiment of the present invention provides a terminal based on a next generation network, including a request message sending unit, configured to send a call fee request message for the call to the switching device after the call is established; The unit is configured to receive the charging result information that is sent by the switching device, and the charging result analysis display unit, configured to parse and display the charging result information received by the charging result receiving unit.

Correspondingly, the embodiment of the present invention provides a switching device based on a next generation network, including a request message forwarding unit, configured to forward a call charge request message sent by the terminal to the application server; and a charging result forwarding unit, For the terminal that is sent by the application server, the fee is sent to the terminal. The request message is forwarded to the terminal by charging result information for charging the call process.

Correspondingly, an embodiment of the present invention provides an application server based on a next generation network, including a request message receiving unit, configured to receive a call charge request message sent by the switching device, and a charging unit, configured to use the request message according to the request message The billing request request message is received by the receiving unit, and the billing process is performed. The billing result sending unit is configured to send the billing result information of the billing unit to the switching device.

The embodiment of the present invention further provides a value-added service processing system based on a next-generation network, including a terminal, a switching device, and an application server, where the terminal is configured to send a value-added service processing request message to the switching device, and the receiving switch device delivers the The value-added service processing result information; the switching device, configured to forward the value-added service processing request message sent by the terminal to the application server, and forward the value-added service processing result information sent by the application server to the terminal; the application server, configured to receive the switching device The value-added service processing request message is sent, and the value-added service processing result information is processed according to the received value-added service processing request message, and the obtained value-added service processing result information is sent to the switching device.

In the NGN network, the interaction between the NGN terminal and the NGN AS is transparently transmitted by the softswitch by using the existing SIP link between the NGN terminal and the switching device, and between the switching device and the NGN AS. The request message and the call log message carrying the call charge information are displayed, so that the NGN terminal does not need to re-establish an IP link with the NGN AS, and the NGN terminal call fee can be achieved, thereby avoiding the NGN terminal and the NGN. The additional signaling overhead between the ASs also reduces the processing load on the NGN terminal and the NGN AS. DRAWINGS

The specific implementation process of the technical solution of the present invention and the corresponding beneficial effects thereof can be described in detail below with reference to the accompanying drawings, in which:

FIG. 1 is a structural block diagram of a network system for implementing an NGN terminal call fee display;

2 is a schematic diagram of a process of implementing NGN terminal call fee display on the network system shown in FIG. 1; FIG. 3 is a block diagram of a system component structure for implementing a call charge display in an embodiment of the present invention; 4 is a block diagram showing specific structures of a terminal, a switching device, and an application server in a system according to an embodiment of the present invention;

FIG. 5 is a flowchart of processing a method for implementing a fee fee display according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of a specific implementation process of an embodiment of a method for implementing a call charge. detailed description

After the NGN terminal is successfully registered on the switching device, the NGN terminal periodically sends a heartbeat message to the switching device. After the switching device returns the corresponding response result, the SIP link is maintained between the two parties, and the switching device and the switching device maintain A corresponding SIP link exists between the NGNs. The technical solution of the embodiment of the present invention is based on the feature that the switching device forwards the terminal and the NGN AS by using the established SIP link after the call is successfully established. The interaction between the request and the call result information, so as to realize the call fee display function of the NGN terminal, thereby avoiding the extra signaling link overhead between the NGN terminal and the NGN AS, and also reducing the NGN terminal and the NGN AS Processing load.

As shown in FIG. 3, it is a block diagram of a system component structure for realizing a call fee for the embodiment of the present invention, which includes an NGN terminal (the NGN terminal 1 and the NGN terminal 2 are shown) and an NGN switching device (the NGN is shown in the figure). The switching device 1 and the NGN switching device 2) and the NGN AS, wherein the NGN terminal is configured to send a call request message corresponding to the call to the exchange through the established SIP link between the NGN switching device after the call is established. The NGN switching device forwards the call charge request message sent by the NGN terminal to the NGN AS through the SIP link established between the NGN AS and the NGN AS (the uplink processing procedure shown in the figure). The NGN AS charges the call process according to the received call charge request message, and sends the charging result information to the NGN switching device, and the NGN switching device further forwards the received charging result information to the NGN terminal. After the terminal analyzes and displays the received charging result information, the terminal can realize the purpose of the call fee display (the downlink processing process shown in the figure). The NGN AS can perform the charging process on the call process at a specified time, and send the charging result information to the NGN switching device. Of course, the NGN AS can also charge the call process after the call process ends. And sending the final charging result information to the NGN switching device. If the NGNAS sends the charging result information when the call process is not finished, the NGNAS can be directly sent based on the SIP link established during the call. If the billing result information is sent at the end of the call, the new link or other out-of-session link needs to be sent.

As shown in FIG. 4, it is a block diagram of a specific structure of a terminal, a switching device, and an application server in the system according to the embodiment of the present invention, where the NGN terminal includes a request message sending unit 101, which is used after the call is established, based on the call established. The SIP link sends a call request request message to the switching device, wherein the call charge request message sent by the request message sending unit 101 can be, but is not limited to, an in-session SIP that carries the call record identifier corresponding to the call. The INFO message, or the SIP MESSAGE message carrying the call record identifier corresponding to the call, etc.; the charging result receiving unit 102, configured to receive the charging result information delivered by the switching device; and the charging result analysis display unit 103, configured to The charging result information received by the charging result receiving unit 102 is subjected to analysis and display processing.

The NGN switching device includes a request message forwarding unit 201, configured to forward the call charge request message sent by the terminal to the NGN AS based on the SIP link that has been established for the call process, and the charging result forwarding unit 202, for The billing result message sent by the NGN AS for the billing request message is forwarded to the NGN terminal. If the NGNAS sends the charging result information when the call process is not completed, the charging result forwarding unit 202 delivers the charging result information to the NGN terminal based on the SIP link that has been established during the call process, and if the NGNAS is sent at the end of the call process For the charging result information, the charging result forwarding unit 202 needs to deliver the charging result information to the NGN terminal based on the newly established link or other out-of-session link.

The NGNAS includes a request message receiving unit 301, configured to receive a call charge request message sent by the switching device, and a charging unit 302, configured to perform the call process according to the call charge request message received by the request message receiving unit 301. The billing process, wherein the billing unit 302 can perform billing for the call process at a specified time to obtain the billing information of different time periods during the call, or perform billing processing on the call process after the call process ends. The final charging result information of the secondary call process; the charging result issuing unit 303 is configured to send the charging result information of the charging unit 302 to the switching device.

As shown in FIG. 5, it is a processing flowchart of a method for implementing a call fee display in an embodiment of the present invention. In an NGN network, after the call is established, the terminal sends a call request message to the switching device. Forwarding the call charge request message to the application server by the switching device (step 10); the application server sends the result information of the billing process to the switching device according to the received call charge request message, and the exchange is performed. The device sends the charging result information to the terminal (step 20); the terminal displays and analyzes the received charging result information (step 30).

The switching device in the NGN network is usually a softswitch device, but may also be a Call Session Control Function (CSCF) in the IP Multimedia Subsystem (IMS). The following embodiments of the present invention The principle of the present invention is described in detail by taking the switching device as a softswitch device as an example. The implementation principle of the CSCF is similar to the implementation principle of the softswitch, and no further description is given here.

Since the link established between the NGN terminal and the NGN softswitch is based on the SIP protocol, the NGN terminal can perform registration and logout processing to the NGN softswitch and interact with the NGN softswitch through the established SIP link. And call signaling messages. The technical solution of the embodiment of the present invention considers that the protocol that can carry the body information in the SIP protocol is a SIP INFO and a SIP MESSAGE message, and the SIP INFO message has been defined in the RFC3261 standard specification, so it is recommended in the technical solution of the embodiment of the present invention. The SIP INFO message is used to implement a message transparently transmitting the interaction between the NGN terminal and the NGN AS by the softswitch. For the same reason, the SIP MESSAGE message can also serve as a bearer protocol for the NGN terminal to exchange messages between the softswitch and the NGN AS. Therefore, the SIP MESSAGE message can also be used in the technical solution of the embodiment of the present invention to implement the transparent transmission of the NGN terminal by the softswitch. A message to interact with the NGN AS.

In this way, after the NGN terminal establishes a call with the called party, the call record identifier of the current call can be carried in the SIP INFO message in the session, and sent to the NGN softswitch as a call charge request message, and the call can be made. The call record identifier is carried in the SIP MESSAGE message and sent to the NGN softswitch as a call charge request message.

Generally, the NGN AS carries the result information of the charging process in the call log message to the NGN terminal through the NGN softswitch, and the call log message delivered includes the call charge information. Information such as call record identification, calling number information, called number information, call start time, and call duration. When the NGN AS sends a call log message, the call is made. The process has ended, so the corresponding call link established between the NGN terminal and the softswitch has also been released. Therefore, the NGN AS can carry the call log message in the out-of-session SIP INFO message or in the SIP MESSAGE message. The softswitch is transparently transmitted to the NGN terminal. The NGN AS can describe the content of the call log message based on Extensible Markup Language (XML).

Based on the system architecture shown in Figure 3, the SIP INFO message protocol is used as an example to describe how the softswitch transparently transmits the message content between the NGN terminal and the NGN AS. The details are as follows:

1. The NGN terminal first registers on the softswitch and then sends the SIP INFO message to the softswitch. Accordingly, the softswitch needs to determine whether the SIP INFO message is sent from the IP address registered with the (From) number.

2. The NGN terminal only needs to configure the IP address of the softswitch, and the NGN AS does not need to know the IP address of the NGN AS. When the NGN terminal sends an INFO message to the NGNAS, it only needs to send the softswitch to the registration.

3. After receiving the SIP INFO message sent by the NGN terminal, the softswitch can determine which NGN AS to forward to according to the NGN AS access code information contained in the Request URI carried by the message.

4. When the NGN AS sends the INFO message carrying the call log message to the NGN terminal, the NGN AS sends the INFO message to the softswitch first, and the softswitch can send the INFO according to the calling number information contained in the Request URI carried by the message. The message is forwarded to the NGN terminal identified by the registered IP address of the number. In this way, the NGN AS does not need to know the registration address information of the NGN terminal. If the NGN terminal does not register on the softswitch, the softswitch can return an error code to the NGN AS after receiving the INFO message sent by the NGNAS.

The INFO message exchanged between the NGN terminal and the NGN AS that is transparently transmitted by the softswitch usually includes the following SIP elements: From, To, Content Type, Content Length, Status Code, Body, Softswitch can lose the INFO message without Body. Discard the processing.

Here, the content of the SIP INFO message exchanged between the NGN terminal and the NGN AS can be uniformly used in the UTF-8 encoding mode, and the transmission content can be encrypted by using the base64 algorithm during the transmission.

The called terminal in which the NGN calling terminal calls may be various types of terminals such as an NGN terminal, a PSTN terminal, a GSM terminal, and a CDMA terminal thereof, and is used in various types of the present invention in the embodiment of the present invention. The terminal is called, and its signaling processing flow is basically similar, and will not be described in detail here.

As shown in FIG. 6 , it is a schematic diagram of a specific implementation process of an embodiment of a method for implementing a call charge, and the specific implementation process is as follows:

After the call between the calling terminal and the called terminal is successfully established, the NGN calling terminal sends a call request message to the corresponding softswitch (SoftSwitch), where the NGN terminal can carry the call record corresponding to the call. The identified intra-session SIP INFO message is used as a call charge request message. That is, after the call between the NGN calling terminal and the called terminal is established, the NGN calling terminal sends an in-session SIP INFO message to the SoftSwitch to carry the call record identifier of the current call; the softswitch sends the SIP INFO message in the session. Forward to the NGN AS. The specific contents of the SIP INFO message sent by the NGN terminal to the SoftSwitch are as follows:

INFO sip:44182@10.75.35.161; user=phone SIP/2.0

Via: SIP/2.0 UDP 10.70.106.82:5060;branch=z9hG4bK3883054875

From: <sip:075589834250@10.75.35.161;user=phone>;tag=1451640803

To: <sip: 075589834251@10.75.35.161;user=phone>

Call-ID: 2585671374@10.70.106.82

CSeq: 38 INFO

Max-Forwards: 5

User-Agent: Flexit Softphone vl.O

Subject: Client Request

Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, REFER, SUBSCRIBE, NOTIFY, MESSAGE, INFO

Content-Type: text/xml

Content-Length: 302

<in^

<callRecordID>e9b3b880-33f8-4b0b-97cb-8a48e711266b</callRecordID> - ——call record identifier

</in^ Parameter Description:

The NGN AS receives the intra-session SIP INFO transparently transmitted by the NGN calling terminal through the SoftSwitch. After the request message is sent, the 200 OK message is sent back to the SoftSwitch, and the 200 OK message sent by the NGN AS is fed back to the NGN calling terminal by the SoftSwitch. The content of the body of the 200 OK message fed back by the NGN AS is empty, and the specific content of the feedback 200 OK message is as follows:

SIP/2.0 200 OK

From: <sip:075589834250@10.75.35.161;user=phone>;tag=1451640803

To: <sip: 075589834251 @10.75.35.161; user=phone>;tag=db2ccb77

CSeq: 38 INFO

Call-ID: 2585671374@10.70.106.82

Via: SIP/2.0 UDP 10.70.106.82:5060;branch=z9hG4bK3883054875;rport=5060

Content-Length: 0 The message content is empty

Content-Type: text/xml After the call process ends, the caller and the called terminal are disconnected. After the NGN AS bills the call, the call record identifier and the calling number are taken. The session log message consisting of the message, the called number information, the call start time, the call duration, and the charging result information is sent to the SoftSwitch through the out-of-session SIP INFO message, and the sessionless SIP INFO message sent by the NGN AS is sent by the SoftSwitch. Transparently transmitted to the NGN calling terminal, wherein the NGN AS can describe the call log message based on the XML language. The details of the out-of-session SIP INFO message sent by the NGN AS to SoftSwitch are as follows:

INFO sip:075589834250@10.70.106.82:5060;user=phone SIP/2.0

From: <sip:44182@10.70.106.82;user=phone>;tag=a942eelb

To: <sip:89834250@10.70.106.82;user=phone>

CSeq: 1 INFO

Call-ID: SBCSBC56bc3b94cb92f4a0B2d32242fd7c5b9@59.37.73.1

Via: SIP/2.0 UDP 10.75.35.161 :5060;branch=z9hG4bK3503edl8b

Max-Forwards: 70

Contact: <sip:44182@10.75.35.161 :5060;user=phone>

Content-Length: 137

Content-Type: text/xml

<in^

<callRecordID>e9b3b880-33f8-4b0b-97cb-8a48e711266b</callRecordID> one call record identifier

<caller>89834250</caller> calling number

<callee>8983425 K/callee> called number <beginTime>20061230135530</ beginTime> Call start time

<callDuration>300</> ^p f H continues B† I ' Division

<fee>150</fee> call

</in^ Parameter Description:

The SoftSwitch finds the corresponding communication link of the NGN calling terminal registered in the SoftSwitch according to the From number identifier carried in the SIP INFO message sent by the NGN AS, and passes the outbound SIP INFO message through the found communication link. Forward to the NGN calling terminal.

After the NGN calling terminal decodes the message content based on the XML description in the body message body in the SIP INFO message transparently transmitted by the NGN AS, the NGN AS correctly displays the detailed record information of the current call on the display interface according to the call record identifier. Thus, the function of the NGN calling terminal call fee is realized.

After receiving the call log message transmitted by the NGN AS through the SoftSwitch, the NGN calling terminal returns a 200 OK message to the SoftSwitch, and the SoftSwitch transmits the received 200 OK message to the NGNAS. The content of the message body in the 200 OK message fed back by the NGN calling terminal is empty, and the specific content of the feedback 200 OK message is as follows:

SIP/2.0 200 OK

Via: SIP/2.0 UDP 10.75.35.161 :5060;branch=z9hG4bK3503edl8b

From: <sip:44182@10.70.106.82;user=phone>;tag=a942eelb To: <sip:89834250@10.70.106.82;user=phone>;tag=3317198443

Call-ID: SBCSBC56bc3b94cb92f4a0B2d32242fd7c5b9@59.37.73.1

CSeq: 1 INFO

Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, MESSAGE, INFO

Content-Length: 00 The content of the message is empty. In the specific process of the foregoing embodiment, the message transparently transmitted between the NGN terminal and the NGN AS through the softswitch may also be based on the SIP MESSAGE message protocol, and the specific implementation process is the same as the implementation of the foregoing embodiment. The principle is similar, and will not be repeated here.

It can be seen that, by using the call fee display implementation solution proposed by the embodiment of the present invention, the following benefits are as follows:

In the embodiment of the present invention, the NGN terminal does not need to register and log out to the NGN AS, and maintains a heartbeat message with the NGN AS, and only needs to maintain the SIP protocol link established during the call and the softswitch. Therefore, the processing load of the NGNAS and the NGN terminal can be better reduced, and the system performance overhead is saved.

In the embodiment of the present invention, the NGN terminal can realize the call fee display by using the existing SIP link and the NGNAS interaction between the softswitch and the NGNAS without adding an additional IP link to the NGN AS. The phone bill is easy to implement, the system is easy to maintain, and the system's scalability and flexibility are enhanced.

In the embodiment of the present invention, the NGN terminal does not need to actively register with the NGN AS. Therefore, the change of the IP address of the NGN AS does not require changes to the configuration of the NGN terminal, so that the maintenance workload can be avoided.

In the embodiment of the present invention, the NGN AS is used as an intelligent platform of the NGN network, and only needs to maintain the existing link between the softswitch and the NGN terminal, so that it does not need to face all the NGN terminals, thereby reducing the NGNAS. The risk of being attacked increases the security of the system.

In addition, if the content of the XML-based description carried by the SIP message protocol is extended, the system embodiment of the present invention can also be applied to other value-added services, such as an NGN terminal instant messaging service, a short message service, and a PIM service thereof, and the present invention. The embodiment also proposes the following value-added service processing system based on the NGN network, including an NGN terminal, a switching device, and an NGNAS (see the above figure for the specific composition structure). 3), wherein the NGN terminal is configured to send a value-added service processing request message to the corresponding switching device, and receive the value-added service processing result information sent by the switching device; and the switching device is configured to process the value-added service sent by the NGN terminal The request message is forwarded to the NGN AS, and the value-added service processing result information sent by the NGN AS is forwarded to the corresponding NGN terminal. The NGN AS is configured to receive the value-added service processing request message sent by the softswitch device, and process the value-added service according to the received value-added service. The request message is processed to obtain the corresponding value-added service processing result information, and the obtained value-added service processing result information is sent to the switching device.

A preferred implementation aspect, in the above-mentioned extended system, the value-added service processing result information transparently transmitted by the NGNAS to the NGN terminal by the switching device may be described based on an XML language; wherein the value-added service processing request message may preferably be a phone bill The request message, the corresponding value-added service processing result information may be the charging result information.

The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for implementing a fee-based display, characterized in that it comprises the steps of:

In the next generation network, after the call is established, the terminal sends a call request request message to the switching device, and the switching device forwards the call charge request message to the application server;

Receiving, by the application server, a call charge request message sent by the switching device;

The application server sends the result information of the charging process to the switching device, and the switching device sends the charging result information to the terminal;

The terminal displays the call charge information according to the received charging result information.

2. The method according to claim 1, wherein the call charge request message is an intra-session SIP INFO message carrying a call record identifier corresponding to the call; or

A SIP MESSAGE message that identifies the call record that corresponds to the call.

3. The method according to claim 1, wherein the application server performs charging for the call process once every predetermined time, and sends the charging result information to the switching device.

The method of claim 1, wherein the application server charges the call process after the call process ends, and sends the charging result information to the switching device.

The method of claim 1, wherein the application server carries the charging result information in a call log message and sends the message to the switching device, where the switching device carries the call with the charging result. The log message is sent to the terminal.

The method of claim 5, wherein the application server carries the call log message in the out-of-session SIP INFO message and sends the message to the switching device, where the switching device will carry the call log message. The out-of-session SIP INFO message is sent to the terminal.

The method of claim 5, wherein the application server carries the call log message in the SIP MESSAGE message and sends the message to the switching device, and the switching device will carry the SIP MESSAGE of the call log message. The message is sent to the terminal.

8. The method of claim 5, wherein the application server is based on an extensible target The language describes the call log message.

9. The method of any of claims 1-8, wherein the switching device is a softswitch device; or

The functional entity device is controlled for the call session in the IP Multimedia Subsystem.

10. A terminal based on a next generation network, characterized by comprising:

a request message sending unit, configured to send a call request request message for the call to the switching device after the call is established;

The charging result receiving unit is configured to receive the charging result information sent by the switching device, and the charging result analysis display unit is configured to parse and display the charging result information received by the charging result receiving unit.

The terminal according to claim 10, wherein the call charge request message sent by the request message sending unit is an intra-session SIP INFO message or a SIP MESSAGE message carrying a call record identifier corresponding to the call.

12. A switching device based on a next generation network, comprising:

a request message forwarding unit, configured to forward the call charge request message sent by the terminal to the application server;

The billing result forwarding unit is configured to forward, to the terminal, the billing result request message sent by the application server and the billing request message sent by the terminal.

The switching device according to claim 12, wherein the switching device is a soft switching device, or is a call session control function entity device in an IP multimedia subsystem.

14. An application server based on a next generation network, comprising:

a request message receiving unit, configured to receive a call charge request message sent by the switching device, and a charging unit, configured to charge the call process according to the call charge request message received by the request message receiving unit;

The charging result sending unit is configured to send the charging result information of the charging unit to the switching device.

15. The application server according to claim 14, wherein the charging unit performs an interval Timed billing for the call process.

The application server according to claim 14, wherein the charging unit charges the call process after the call process ends.

The application server according to claim 14, wherein the charging result delivery unit carries the charging result information in a call log message and sends the information to the switching device.

The application server according to claim 17, wherein the charging result delivery unit carries the call log message in an out-of-session SIP INFO message, or is carried in a SIP MESSAGE message and sent to the exchange. device.

The application server according to claim 17, wherein the charging result delivery unit describes the call log message based on the extensible markup language.

20. A value-added service processing system based on a next-generation network, comprising: a terminal, a switching device, and an application server, wherein:

a terminal, configured to send a value-added service processing request message to the switching device, and receive the value-added service processing result information delivered by the switching device;

The switching device is configured to forward the value-added service processing request message sent by the terminal to the application server, and forward the value-added service processing result information sent by the application server to the terminal;

The application server is configured to receive the value-added service processing request message sent by the switching device, and process the value-added service processing result information according to the received value-added service processing request message, and send the obtained value-added service processing result information to the exchange. device.

The system according to claim 20, wherein the application server describes the value-added service processing result information based on the extensible markup language.