CN102026108A - Method and system for implementing distinctive ringing in call waiting service - Google Patents

Abstract

The invention discloses a method for implementing differential ringing in call waiting service. After a calling user terminal sends an INVITE message to an application server (AS), the AS generates corresponding call waiting differential ringing tone information according to the calling user information, and Send the corresponding call waiting distinctive ring tone information to the called user terminal through the INVITE message; the called user terminal is in a call, then the called user terminal generates a corresponding call waiting tone and provide it to the called user. The invention also correspondingly discloses a system for realizing differentiated ringing in the call waiting service. Since the called user terminal can generate the corresponding call waiting tone according to the call waiting differentiated ring tone information sent by the AS, and provide it to the called user, so the present invention can realize the differentiated ring in the call waiting service, so as to improve user experience.

Description

Method and system for implementing differentiated ringing in call waiting service

technical field

The invention relates to an Internet Protocol (IP) multimedia subsystem in the communication field, in particular to a method and a system for realizing differentiated ringing in the call waiting service of the IP multimedia subsystem.

Background technique

IP Multimedia Core Network Subsystem (IMS) is an IP-based network architecture proposed by the 3rd Generation Partnership Project (3GPP), which builds an open and flexible business environment , support multimedia applications, and provide users with rich multimedia services.

IMS is an IP-based telecommunications network architecture and has nothing to do with access technology. In addition to providing services for packet access networks such as General Packet Radio Service (GPRS) and Wireless Local Area Network (WLAN), it also provides It can provide services for mobile cellular networks such as Global System for Mobile communications (GSM) and Unified Mobile Telecommunications System (UMTS).

In the IMS service system, the control layer and the service layer are separated. Among them, the service triggering and control functions in the control layer are completed by the call session control function entity (Call Session Control Function, CSCF). There are three types of Serving; the business layer is composed of a series of application servers (Application Server, AS), which can provide specific business services. AS can be an independent entity, or exist in the Serving Call Session Control Function (Serving Call Session Control Function, S -CSCF), the S-CSCF controls service triggering according to user subscription information, invokes services on the AS, and implements service functions. The AS and the S-CSCF may be collectively referred to as Server Equipment (SE). In addition, the end-to-end device in the session is called user equipment (User Equipment, UE), which is responsible for interaction with the user. These functional entities communicate using the SIP (Session Initiation Protocol) protocol.

Figure 1 is a schematic diagram of an IMS network architecture according to the prior art. As shown in Figure 1, the IMS network architecture according to the prior art generally includes: Home Subscriber Server (HSS), CSCF, AS, Access Gateway Control Function (Access Gateway Control Function, AGCF) and user equipment UE1, UE2, . . . , UEn.

Figure 2 is a schematic diagram of the basic call flow of three UEs in the existing IMS system. For simplicity, it is assumed that there is only one AS among the three UEs, and the relevant CSCF units are omitted and replaced. As shown in Figure 2, during the call between UE1 and UE2, UE3 When initiating a call to UE1, the basic call steps are as follows:

Step 201: UE3 goes off-hook and initiates a call to the AS.

Step 202: AS sends an INVITE message to UE1.

The INVITE message carries the alert information (alert-info) to distinguish the alert unit.

Step 203: Since UE1 is talking with UE2 at this time, the call waiting process is started. At this time, the user listens to the call waiting tone, and returns a 180 response to the AS.

Step 204: AS returns a 180 response to UE3, and the subsequent steps 205 to 208 are the same as the existing call flow, that is, UE3 sends a PRACK message to AS, and AS sends a PRACK message to UE1. After UE1 responds with a 200 OK response to AS, AS sends a reply to UE3. 200 OK response.

To sum up, the existing technology can realize the call waiting service, but there are the following defects: Since the IMS-related standards only define the implementation of differentiated ringing for ordinary calls, the specific ringing mode is carried through the alert-info information unit, but it does not The implementation process of differentiated ringing for services in the call waiting process is not defined. Therefore, the IMS cannot implement the differentiated ringing service in this scenario. As a result, the called user cannot obtain information about the user on call waiting in the call waiting scenario, thereby affecting user experience.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method and system for implementing differentiated ringing in the call waiting service, which enables the called user to obtain relevant information of the user on call waiting, so as to improve user experience.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for implementing differentiated ringing in a call waiting service, comprising:

After the calling user terminal sends an INVITE message to the application server AS, the AS determines that the called user has the differentiated ringing and call waiting services, and generates corresponding call waiting differentiated ring tone information according to the calling user information, and carries it through the INVITE message and sending the corresponding call waiting distinctive ring tone information to the called user terminal;

When the called user is in a call, the called user terminal generates a corresponding call waiting tone according to the call waiting distinctive ring tone information issued by the AS, and provides it to the called user.

The AS carries the call waiting distinctive ring tone information through the SIP header field or the SIP message body in the INVITE message.

The network element associated with the called user judges whether the called user is in a call, and generates a corresponding call waiting tone according to the call waiting distinguishing ring tone information issued by the AS, and provides it to the called user.

The network element associated with the called user is the user equipment or the access gateway control function AGCF.

A system for implementing differentiated ringing in a call waiting service, comprising a calling user terminal, a called user terminal and an AS, wherein,

The calling user terminal is configured to send an INVITE message to the AS when a call is initiated;

The AS is configured to determine whether the called user has the differentiated ringing and call waiting service after receiving the INVITE message sent by the calling user terminal, and when the called user has the differentiated ringing and call waiting service, according to the calling user terminal calling user information to generate corresponding call waiting distinctive ring tone information, and carrying and sending the corresponding call waiting distinctive ring tone information to the called user terminal through the INVITE message;

The called user terminal is configured to generate a corresponding call waiting tone according to the call waiting distinctive ring tone information delivered by the AS when the called user is in a call, and provide it to the called user.

The AS carries and sends the corresponding call waiting distinctive ring tone information to the called user terminal through the INVITE message as follows: the AS carries the call waiting distinctive ring tone information through the SIP header field or the SIP message body in the INVITE message.

The system also includes a network element associated with the called user,

The AS is also used to carry and send call waiting distinctive ring tone information to the network element associated with the called user through the INVITE message;

The network element associated with the called user is used to judge whether the called user is in a call, and generate a corresponding call waiting tone according to the call waiting distinguishing ring tone information issued by the AS, and provide it to the called user.

The network element associated with the called user is the user equipment or the AGCF.

The implementation method and system of the differential ringing in the call waiting service of the present invention, the AS carries and sends the call waiting differential ring tone information to the called user terminal through the INVITE message, and the called user terminal sends the call waiting differential ring tone according to the AS The information generates a corresponding call waiting tone and provides it to the called user. Therefore, the present invention can realize the differentiated ringing in the call waiting service, so that the called user can obtain relevant information of the user on call waiting, so as to improve user experience.

Description of drawings

FIG. 1 is a schematic diagram of an IMS network architecture according to the prior art;

FIG. 2 is a schematic diagram of the basic flow of three UE calls in the existing IMS system;

Fig. 3 is a schematic flow chart of a method for implementing differentiated ringing in the call waiting service of the present invention;

FIG. 4 is a schematic flow diagram of a method for implementing differentiated ringing in the call waiting service of Embodiment 1;

Fig. 5 is a schematic flowchart of a method for implementing differentiated ringing in the call waiting service in Embodiment 2.

Detailed ways

The basic idea of the present invention is: the AS carries and sends the call waiting distinguishing ring tone information to the called user terminal through the INVITE message, and the called user terminal generates a corresponding call waiting tone according to the call waiting distinguishing ring tone information issued by the AS, and provided to the called user.

The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings.

Fig. 3 is the schematic flow chart of the implementation method of the differential ringing in the call waiting service of the present invention, as shown in Fig. 3, the implementation method of the differential ringing in the call waiting service of the present invention generally comprises the following steps:

Step 301: the calling user terminal sends an INVITE message to the AS.

Step 302: The AS determines that the called user has the DSR and CW services, and generates corresponding DSR tone information for call waiting according to the information of the calling user.

Step 303: The AS carries and sends the corresponding call waiting distinctive ring tone information to the called user terminal through the INVITE message.

Specifically, the AS may carry the call waiting distinctive ring tone information through the SIP header field or the SIP message body in the INVITE message.

Step 304: the called user is in a call, the called user terminal generates a corresponding call waiting tone according to the call waiting distinctive ring tone information issued by the AS, and provides it to the called user.

Here, the network element associated with the called user may also judge whether the called user is in a call, and generate a corresponding call waiting tone according to the call waiting distinguishing ring tone information issued by the AS, and provide it to the called user. It should be noted that the network elements associated with the called user include entities such as user equipment and an access gateway control function (AGCF).

The present invention also proposes a system for implementing differentiated ringing in the call waiting service, including a calling user terminal, a called user terminal and an AS, wherein,

The calling user terminal is used to send an INVITE message to the AS when the call is initiated;

AS, used to determine whether the called user has the differentiated ringing and call waiting service after receiving the INVITE message sent by the calling user terminal, and when the called user has the differentiated ringing and call waiting service, according to the calling user generating corresponding call waiting distinctive ring tone information, and carrying and sending the corresponding call waiting distinctive ring tone information to the called user terminal through the INVITE message;

The called user terminal is configured to generate a corresponding call waiting tone according to the call waiting distinctive ring tone information issued by the AS when the called user is in a call, and provide the corresponding call waiting tone to the called user.

The AS carries and sends the corresponding call waiting distinctive ring tone information to the called user terminal through the INVITE message as follows: the AS carries the call waiting distinctive ring tone information through the SIP header field or the SIP message body in the INVITE message.

The system also includes a network element associated with the called user,

The AS is also used to carry and send call waiting distinctive ring tone information to the network element associated with the called user through the INVITE message;

The network element associated with the called user is used to judge whether the called user is in a call, and generate a corresponding call waiting tone according to the call waiting distinguishing ring tone information issued by the AS, and provide it to the called user.

The network element associated with the called user is the user equipment or the AGCF.

Example 1

This embodiment involves three user equipments UE1, UE2 and UE3 in the IMS domain, where UE1 and UE2 are talking, and UE3 initiates a call to UE1 at this time, there is only one AS among the three user equipments, and the relevant CSCF unit is omitted replace. Fig. 4 is the schematic flow diagram of the implementation method of the differential ringing in the call waiting service of embodiment 1, as shown in Fig. 4, the implementation method of the differential ringing in the call waiting service of embodiment 1 comprises the following steps:

Step 401: UE3 goes off-hook and initiates a call to the AS.

Step 402: AS sends an INVITE message to UE1.

The INVITE message carries call waiting distinctive ringing information, such as call waiting information (call-waiting-info).

Step 403: UE1 is talking with UE2 at this time, then UE1 uses the call waiting to distinguish the ringing information, plays the corresponding call waiting tone to the user, and returns a 180 response to the AS.

Step 404: AS returns a 180 response to UE3.

Steps 405 to 408 are the same as the existing call flow.

Example 2

This embodiment involves three user equipments UE1, UE2 and UE3 in the IMS domain, wherein UE1 and UE2 are talking, and UE3 initiates a call to UE1 at this time, and UE1 needs to interact with AS through AGCF. Figure 5 is a schematic flow chart of a method for implementing differentiated ringing in the call waiting service in Embodiment 2. As shown in Figure 5, the method for implementing differentiated ringing in the call waiting service in Embodiment 2 includes the following steps:

Step 501: UE3 goes off-hook and initiates a call to the AS.

Step 502: the AS sends an INVITE message to the AGCF.

The INVITE message carries call waiting distinctive ringing information, such as call-waiting-info.

Step 503: AGCF determines that UE1 is in a call, and its service needs to be realized by AGCF, then AGCF converts the call waiting differentiated ringing information into a corresponding message and sends it to UE1.

Step 504: AGCF returns a 180 response to AS.

Step 505: AS returns a 180 response to UE3.

Steps 506 to 509 are the same as the existing call flow.

According to the basic principles of the present invention, the call waiting distinctive ringing information can be carried by the SIP INVITE message, such as carried in the SIP message header field or message body.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (8)

1. an implementation method of differentiated ringing in a call waiting service, it is characterized in that the method comprises: After the calling user terminal sends an INVITE message to the application server AS, the AS determines that the called user has the differentiated ringing and call waiting services, and generates corresponding call waiting differentiated ring tone information according to the calling user information, and carries it through the INVITE message and sending the corresponding call waiting distinctive ring tone information to the called user terminal; When the called user is in a call, the called user terminal generates a corresponding call waiting tone according to the call waiting distinctive ring tone information issued by the AS, and provides it to the called user. 2. The method for implementing differentiated ringing in the call waiting service according to claim 1, wherein the AS carries the call waiting differentiated ring tone information through the SIP header field or the SIP message body in the INVITE message. 3. The method for implementing differentiated ringing in the call waiting service according to claim 1, wherein the network element associated with the called user judges whether the called user is in a call, and according to the call issued by the AS The waiting distinctive ring tone information generates a corresponding call waiting tone and provides it to the called user. 4. The method for implementing differentiated ringing in the call waiting service according to claim 3, wherein the network element associated with the called user is a user equipment or an access gateway control function (AGCF). 5. A realization system of differentiated ringing in a call waiting service, characterized in that the system comprises a calling user terminal, a called user terminal and an AS, wherein, The calling user terminal is configured to send an INVITE message to the AS when a call is initiated; The AS is configured to determine whether the called user has the differentiated ringing and call waiting service after receiving the INVITE message sent by the calling user terminal, and when the called user has the differentiated ringing and call waiting service, according to the calling user terminal calling user information to generate corresponding call waiting distinctive ring tone information, and carrying and sending the corresponding call waiting distinctive ring tone information to the called user terminal through the INVITE message; The called user terminal is configured to generate a corresponding call waiting tone according to the call waiting distinctive ring tone information delivered by the AS when the called user is in a call, and provide it to the called user. 6. the realization system of the differential ringing in the call waiting service according to claim 5, it is characterized in that, described AS carries and sends described corresponding call waiting differential ringing tone information to the called user terminal by INVITE message : The AS carries the call waiting distinctive ring tone information through the SIP header field or SIP message body in the INVITE message. 7. The system for implementing differentiated ringing in the call waiting service according to claim 5, characterized in that the system also includes a network element associated with the called user, The AS is also used to carry and send call waiting distinctive ring tone information to the network element associated with the called user through the INVITE message; The network element associated with the called user is used to judge whether the called user is in a call, and generate a corresponding call waiting tone according to the call waiting distinguishing ring tone information issued by the AS, and provide it to the called user. 8. The system for implementing differentiated ringing in call waiting service according to claim 7, characterized in that, the network element associated with the called user is user equipment or AGCF.

Images