KR101009846B1 - Method for providing service charge in SIPSession Initiation Protocol terminal on real time and SIP terminal apparatus - Google Patents

Abstract

The present invention relates to a method for providing a service usage fee in real time by using a SIP server using a SUBSCRIBE message and a NOTIFY message of a SIP (Session Initiation Protocol) and a SIP terminal device.

The SIP terminal apparatus according to the present invention comprises a control unit for recognizing a variety of information used to use the service of the SIP terminal apparatus, routing the call to the proxy server, and establishes and controls a media session after call establishment; A transmission / reception unit connected to an IP network to transmit a packet to or receive a packet from a proxy server under the control of a controller; And a billing processing unit configured to receive billing information from the proxy server through a transceiver during call setup and to perform billing logic on a service to generate billing information on a service in real time. The SUBSCRIBE message is transmitted to the proxy server through the transmission and reception, and receives a NOTIFY message including the charging information from the proxy server, characterized in that to provide the service usage fee through the charging processing in real time.

Description

Method for providing service charge in Session Initiation Protocol (SIP) terminal on real time and SIP terminal apparatus

1 is a flowchart illustrating a method of establishing a 'notification request-notification' relationship when a SIP terminal apparatus and a proxy server interoperate, and an interworking method accordingly.

2 is a block diagram of a SIP terminal device capable of providing a service charge in real time according to the present invention.

3 is a flowchart of a process for providing a service usage fee in real time in a SIP terminal according to the present invention;

The present invention relates to a method for providing a service usage fee in real time in a SIP (Session Initiation Protocol) terminal device, and more particularly, to a SIP server using a SIP SUBSCRIBE message and a NOTIFY message. The present invention relates to a method for providing a service charge in real time by a SIP terminal device and an SIP terminal device.                         

In the conventional public switched telephone network (PSTN), a real-time service usage fee display function is provided centering on a public telephone limited to the remaining amount display function. In this case, the exchange determines the destination of the call at the same time as the call is attempted from the public telephone, The charging pulse is generated accordingly and transmitted to the public telephone. The public telephone receiving the charging pulse analyzes the charging pulse, recovers the appropriate fee from the user's coin or telephone card, and displays the remaining amount on the LCD screen of the public telephone.

Such a conventional method has difficulty in providing various charging methods and user-oriented real-time service fee information to users because the charging information is carried in a standardized form called charging pulses.

On the other hand, SIP terminal devices using voice over IP (Internet Protocol) technology, which has recently been in the spotlight, work in conjunction with VoIP gateways (SIP proxy server, H.323 gatekeeper, etc.) that play a role similar to that of a PSTN exchange. to provide.

FIG. 1 illustrates a method for establishing a 'notification request-notification' relationship and an interworking method according to a SIP terminal device interworking with a proxy server.

As shown, generally, the SUBSCRIBE message 2 is used to request a notification reservation function for a SIP server when a status change of a proxy server or another SIP terminal resource occurs as a notification requester, and a NOTIFY message (4). , 6, and 8) are used to notify the SIP server that the proxy server or another SIP terminal device has made a notification request when a state change of a resource that has been requested for notification occurs.                         

And the establishment of the 'request request-notification' relationship (10) is completed by the exchange of the SUBSCRIBE (2), NOTIFY message (4) between the notification requester and the notifier, the notification requester is a notification requester It is your duty to inform them.

According to Request For Comments (RFC) 3265, a notifier must inform initial status information only once upon receipt of a SUBSCRIBE message (2) via a NOTIFY message (4), after which a NOTIFY message (6 , 8). If there is no initial status information to be sent, the body should send an empty NOTIFY message (4) to indicate that a 'notification request-notification' relationship has been established (10).

When the notification requester makes a notification request request to the notifier about the state change of a resource by using the SUBSCRIBE message (2), the notification requester indicates the event package name for the notification and, if necessary, the event header field of the SUBSCRIBE message (2). Parameters for this should be clearly stated, and the Accept header field shall specify the format for this event information and notify the notifier. In response to the request of the notification requester, the notifier composes the notification information according to the format defined by the notification requester in the Accept header field in the SUBSCRIBE message (2) and places it in the body of the NOTIFY message (4). Done.

The event package name and format of event information between the notification requester and the notifier used in this mutual 'notification request-notification' relationship are different depending on the type of service provided, and various standards for the present presence service and conference service are available. The group is rushing to standardize.                         

For example, in the presence service represented by the buddy list of the Internet messenger, when the notification requester (user terminal device) requests the notifier (presence server) to notify the status information of the buddy lists registered to the user, The notifier receives the status change information from the user terminal device registered in the buddy list and notifies the notification requester, and the notification requester updates the status information of the members registered in the buddy list of the Internet messenger on the terminal device. In this case, the event package is named 'presence' and the event information format is 'application / cpim-pidf + xml'.

However, in the case of providing a service to the SIP terminal device, most of them cannot support the real-time service usage fee function due to the functional limitation of the proxy server.

In order to solve the above problems, an object of the present invention is to display the service charge in real time by the SIP terminal device interworking with the proxy server using the SIP message.

Another object of the present invention is to provide billing information for using a corresponding service to a SIP terminal device when a charging signal is generated due to a call setup of the SIP terminal device in a proxy server.

To this end, the SIP terminal device according to the present invention includes a control unit for recognizing a variety of information used to use the service of the SIP terminal device, routing the call to the proxy server, and establishes and controls a media session after call establishment; A transmission / reception unit connected to an IP network to transmit a packet to a proxy server or to receive a packet from a proxy server under control of a controller; And a billing processing unit configured to receive billing information from the proxy server through a transceiver during call setup and to perform billing logic on a service to generate billing information on a service in real time. The SUBSCRIBE message is transmitted to the proxy server through the transmission and reception, and receives a NOTIFY message including the charging information from the proxy server, characterized in that to provide the service usage fee through the charging processing in real time.

According to the present invention, a method for displaying a service charge in real time in a SIP terminal interworking with a proxy server includes: a SUBSCRIBE message for transmitting a real-time billing information notification request according to service use from a SIP terminal to a proxy server; process; Transmitting a NOTIFY message from the proxy server to the SIP terminal in response to the SUBSCRIBE message; A third step of, if the SIP terminal requests a call connection, the proxy server checks the destination of the call and transmits charging information about the call to the SIP terminal; And a fourth process of calculating the service usage fee using the billing information and the call information in the SIP terminal and displaying and providing the calculated service usage fee in real time.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a SIP terminal device capable of displaying service charges in real time according to the present invention.                     

The SIP terminal device according to the present invention includes an operation unit 26, a control unit 27, a charging processing unit 24, a display unit 25, a codec processing unit 22, an input / output unit 23, and a transmission / reception unit 21. The operation unit 26 performs a function of inputting various characters and numbers, and the control unit 27 is connected to the operation unit 26 to recognize various characters and numbers, and controls peripheral devices to call specific proxy servers. Routing, open a media session after setting up a call with a destination server or other terminal device, and control it. The billing processing unit 24 receives the billing information from the proxy server when setting up a call and performs a billing service logic to generate real-time service charge information, and the display unit 25 generates a real-time service generated from the billing processing unit 24. The billing information is received and displayed on the display device. The codec processor 22 stores and processes codec information related to a media session, and the input / output unit 23 receives or outputs voice and multimedia information to the outside, and the transceiver 21 is directly connected to the IP network to receive a packet. Send or receive

During call setup, a general call control-related SIP message is directly involved in the transceiver 21 and the controller 27. That is, when the SIP terminal device transmits a SIP message for call setup, the control unit 27 generates a corresponding SIP message and transmits it to the transceiver unit 21. In contrast, when the SIP terminal apparatus receives the SIP message, the control unit 21 receives the SIP message. ) Knows that it is a SIP message and informs the control unit 27 of information extracted from the SIP message.

And when the call is set up, the billing information for the call is transferred from the proxy server to the SIP terminal through the NOTIFY message, and the transceiver 21 of the SIP terminal separates the NOTIFY message from other call-related SIP messages in its application protocol layer. And the body part of the message including the charging information is directly transmitted to the charging processing unit 24.

The charging processing unit 24 extracts the charging information for the call from the body part of the SIP message, and then calls related information such as the calling number, the called number, the calling time, the elapsed time of the call, and the amount of packets transmitted and received currently stored in the SIP terminal device. In combination with, a new user-oriented real time service fee format is determined, and the resulting values are calculated and then transmitted to the display device of the display unit 25.

In addition, the charging processing unit 24 may execute the built-in charging additional service module according to these calculated result values. For example, if the user sets a warning sound or an announcement when the user talks over 3 minutes or charges exceeding 1,000 won for the international call, the billing processing unit 24 is reminded of these conditions. The calculated result values are compared and activated when the corresponding condition is satisfied, and the built-in billing supplementary service logic is executed.

At this time, the user setting for the built-in supplementary service may be performed through the operation unit 26 of the SIP terminal device, and the built-in supplementary service module may be downloaded in a plug-in form through the homepage of the terminal device manufacturer.

On the other hand, the path to the bearer channel in the SIP terminal device is the transceiver unit 21, the codec processing unit 22-the input and output unit 23 under the control of the control unit 27.

3 is a flowchart illustrating a process for displaying a service usage fee in real time in a SIP terminal device according to the present invention, in which case the SIP terminal device 1 30 attempts to connect a call with the SIP terminal device 2 50. For example, the process of displaying the service usage fee in real time in conjunction with the proxy server 40 will be described.

First, when the SIP terminal 1 (30) is first connected to the SIP network, the SUBSCRIBE message (41) through the SUBSCRIBE message 41 to request the notification of the real-time charging information generated when the call is set up (S31). At this time, an event package name for real time charging information must be described in the Event header field of the SUBSCRIBE message 41, and a format for real time charging information such as text and xml must be defined in the Accept header field. The event package name and format for real-time charging information may be arbitrarily determined and applied by the service provider, and thus the present invention will not be limited thereto.

In response to the SUBSCRIBE message 41, the proxy server 40 sends a NOTIFY message 42 to the SIP terminal 1 30 indicating the completion of the 'notification request-notification' relationship. After the 'notification request-notification' relationship is established, when a change occurs in the billing method or the billing system in the proxy server 40, the proxy server 40 reapplies the SIP terminal device 1 30 using a NOTIFY message in real time. You will be notified.

After establishing the 'notification request-notification' relationship as described above, the SIP terminal 1 30 sends an INVITE message 43 to the proxy server 40 to establish a call to the SIP terminal 2 50 (S33).

After receiving the call setup request, the proxy server 40 determines the destination of the call, and then checks whether the SIP terminal 1 30 has made a SUBSCRIBE message 41 to notify the call state change before routing the call. If there is a request for notification, real-time charging information is generated accordingly and loaded on the NOTIFY message 44 and sent to the SIP terminal 1 (30) (S34). At this time, the real-time charging information generated by the proxy server 40 is different depending on the charging policy of the operator, but generally includes a charging method, a fee system, and the like. Representative billing methods include time billing and packet billing. The billing system can be determined by the service usage fee per unit time for each service code for time billing and the service fee per packet for packet billing.

In addition, the proxy server 40 transmits an INVITE message 44 to the SIP terminal 2 50 for setting up a call requested from the SIP terminal 1 30 (S35). When the 200 OK message 46 is received as a confirmation of the INVITE message, the ACK message 47 indicating the completion of the INVITE transaction is transmitted, and then the charging processing unit is operated to perform real-time charging information received from the proxy server 40 and itself. Using the call information stored in the system, the caller reports the calling number, the called number, the total service using time, the total sending / receiving packet amount, the service using amount, and the accumulated service amount by period using the display device in real time (S37). ).

When the proxy server 40 receives the ACK message 47 from the SIP terminal 1 30, the proxy server 40 starts to generate the charging data. At the same time, the SIP terminal 1 30 starts a service by allocating channels such as a real-time transport protocol (RTP) and a real-time transport control protocol (RTCP) for mutual media exchange with the SIP terminal 2 (50). (S38).

After that, in order to terminate the service, the SIP terminal 1 30 transmits the BYE message 39 to the proxy server 40 (S39), and receives the BYE message through the proxy server 40 (2). 50 transmits a 200 OK message 49 in response (S40).

After receiving the 200 OK message 49, the proxy server 40 ends the generation of the charging data (S41), and then transmits the 200 OK message 50 to the SIP terminal 1 (30) to the SIP terminal 1 (30). Release the operation of the billing processing unit in operation (S42).

As described above, in the present invention, 'notification request-notification' for providing a real-time service usage fee between the SIP proxy server and the SIP terminal device before call setup using the SUBSCRIBE message and the NOTIFY message, which are SIP extension messages defined in RFC 3265. The relationship is established, and the SIP terminal device can provide the service fee in real time by analyzing the billing information for the service received from the proxy server and displaying it on the screen.

As described above, the present invention enables the user of the SIP terminal device in real time to provide the SIP terminal user in real time, so that the user can quickly notify the user of the change in the service usage amount due to the change in the billing policy of the operator In addition, it is expected to help prevent complaints caused by excessive charges for service usage in advance.

Claims (10)

In a SIP terminal device that interworks with a proxy server, A controller for routing a call to the proxy server and setting and controlling a media session after setting up the call; A transmission / reception unit connected to an IP network to transmit a packet to or receive a packet from the proxy server under the control of the controller; And And a billing processing unit for receiving billing information from the proxy server through the transceiver and performing billing logic for the service to generate billing information for the service in real time. The control unit transmits a SUBSCRIBE message for the notification request of the charging information to the proxy server through the transmission and reception unit, receives a NOTIFY message including the charging information from the proxy server, and receives the SUBSCRIBE message from the proxy server. SIP terminal for providing a service usage fee in real time, characterized in that to provide the service usage fee in real time. The method of claim 1, An operation unit which receives various letters and numbers required to use the service; An input / output unit for receiving or outputting voice and multimedia information necessary for using the service; A display unit displaying the real-time service fee information; And And a codec processing unit configured to store codec information related to the media session and process the same. The method of claim 1, The transceiver unit, SIP terminal other than the NOTIFY message including the charging information SIP terminal apparatus for providing a service charge in real time characterized in that the transfer to the control unit to process. The method of claim 1, The charging processing unit, Providing the service fee in real time by using the billing information, the call-related information including the calling number, called number, call elapsed time, transmission and reception packet amount for the call in real time SIP terminal device. The method of claim 1, The charging processing unit, Built-in billing supplementary service module to generate and provide the billing information according to the billing information setting conditions input from the user through the user interface unit, the billing supplementary service module charges the service fee, characterized in that downloaded in the form of a plug-in SIP terminal providing in real time. The method of claim 5, The charging information setting condition is to provide information on the service usage fee when a specific time point is reached according to the usage time and the usage fee of the service, and the information on the service usage fee is provided as an alarm and guide broadcast. SIP terminal for providing a real time service usage fee, characterized in that. The method of claim 1, The SUBSCRIBE message is, And an event package name for the charging information in an event header field, and a format for the charging information in an accept header field. In the method for providing a service usage fee in real time in a SIP terminal device that works with a proxy server, A first step of transmitting, by the SIP terminal device, a SUBSCRIBE message for a real-time charging information notification request according to the use of the service from the SIP server to the proxy server; Transmitting a NOTIFY message from the proxy server to the SIP terminal in response to the SUBSCRIBE message; A third step of, when the SIP terminal requests a call connection, the proxy server confirms a destination of the call and transmits charging information about the call to the SIP terminal; And And a fourth step of calculating, by the SIP terminal device, the service fee using the billing information and the call information, and displaying and providing the calculated service fee in real time. How to provide a charge in real time. The method of claim 8, The SUBSCRIBE message is, And an event package name for the charging information in an event header field, and defining a format for the charging information in an accept header field in real time. The method of claim 8, The SIP terminal device, And a fifth process of performing the alarm and announcement broadcast when the user requests the alarm and announcement broadcast for the fee at a specific time according to the service usage time and the usage fee. How to provide rates in real time.

Images