CN109618293B

CN109618293B - Three-party call method based on Volte network

Info

Publication number: CN109618293B
Application number: CN201910007524.6A
Authority: CN
Inventors: 祝敬安; 顾晓东; 丁正; 王红熳; 周红敏; 韦红; 程钢; 胡菁苑; 刘君晓
Original assignee: Shanghai Xinfang Software Co ltd; Shanghai Cintel Intelligent System Co ltd
Current assignee: Shanghai Xinfang Software Co ltd; Shanghai Cintel Intelligent System Co ltd
Priority date: 2019-01-04
Filing date: 2019-01-04
Publication date: 2021-07-06
Anticipated expiration: 2039-01-04
Also published as: CN109618293A

Abstract

The invention relates to a three-party call method based on a Volte network, which adopts an intelligent network communication platform mode to analyze call of three parties, realizes conference building and charging separation statistics on the premise of not modifying a core network program and an MMTEL trigger sequence, and simultaneously meets the requirement of telephone traffic separation charging of a user and the requirement of three-party call realized by single-step operation. When the two-person extension three-party call is carried out, the third party can be directly called without repeated operation, and the call experience of the user is reserved. The invention has the beneficial effects that: 1. the technology deployment, evolution and reconstruction cost is low; 2. easy-to-use operation of a user is realized; 3. the problem that charging cannot be separated is solved; 4. media conference resources are saved; 5. the existing architecture and the triggering sequence of the telecommunication network are not changed, and the method is more practical and efficient.

Description

Three-party call method based on Volte network

Technical Field

The invention relates to the field, in particular to a three-party call method based on a Volte network.

Background

With the social development, people pay more and more attention to daily life and work efficiency, and more people carry out three-party communication in a non-traditional physical meeting mode by means of communication technologies such as mobile phones, fixed phones and networks. The application not only greatly saves the communication cost, but also brings communication convenience to a plurality of telephone users, and the users receive attention and welcome from all parties.

The user hopes to have a safe and unobstructed conversation environment, and simultaneously reduces the extra communication cost generated due to telephone traffic as much as possible; operators also hope to make traffic separation statistics and charging from the source through a technical approach, and provide a safe, reliable, convenient and easy-to-use conversation environment for the public.

The current telecommunication technology for three-party call is as follows:

creating meetings in advance based on MMTEL (Multi Media Telephony)

The MMTEL creates a conference, when calling number calls called number B, the calling number directly distributes conference resources and creates the conference through the MMTEL, meanwhile, a recording table is stored on a control point, and recorded conference information comprises a conference host, a participant and a charging party.

The above method has some disadvantages, which are as follows:

conference resource waste: for all platform calls, conference resources need to be allocated one by one, and for most telephone traffic which does not participate in three-party calls, resource waste is caused

Loss of charging scene: the calling party communicates with the user B, meeting requirements are generated in the discussion process, and the user C needs to be pulled into three parties. At the moment, the charging bills are mixed, so that the problem that the charging cannot be separated is caused.

Intelligent network platforms cannot create conferences: based on the current core network structure and the MMTEL trigger program, the conference lead is inconsistent with the intelligent network platform lead, and the demands of changing numbers and the like are generated, so that the conference pull failure is caused.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Aiming at the technical problems in the related art, the invention provides a three-party call method based on a Volte network, which can deploy a system with the minimum cost on the operator level and simultaneously solve the problem of disordered charge or poor experience that a three-party call cannot be created in user experience. The telephone system really provides a safe, reliable, convenient and easy-to-use conversation environment for telephone users.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows: a three-party call method based on a Volte network is characterized by comprising the following steps:

s1, dialing B to form a call, AGCF triggering a VPN service AS platform to generate a trigger message Invite, AGCF transmitting the call to MMTel, MMTel triggering and transmitting the call to the AS platform again, the AS platform performing number changing process on the call, and A and B communicating;

s2, A calls with B in a holding state by operating the row fork B, and A dials C to trigger the call flow of A and C, wherein A and C are in call;

s3, A listens to the hold tone through operating the clapping fork 3, B and C, and is in a hold state at the same time, A creates a conference and sends invite applying for multi-party call resources to the AS platform;

s4, the AS platform transparently transmits the application message to MMTel, and the multi-party call media applied by MMTel replies 200OK signaling message;

s5, AGCF receives the 200OK signaling message, replies ACK confirmation message, indicates to modify the media type of A, AGCF receives the response of finishing modifying the media type, then sends refer signaling message to AS, indicates to add B into the conference;

s6, MMTel carries out session association, B is pulled into a conference, AS starts to charge the conversation between A and B after receiving a NOTIFY 200OK signaling message, the conversation between A and B receives a BYE instruction message before the conference is created, and a service records a ticket of the conversation between A and B before the conference is created;

s7, the AS receives a refer signaling message sent by the AGCF to indicate that C is added into the conference, MMTel performs session association, C is pulled into the conference, the AS starts to charge the conversation between A and C after receiving the NOTIFY 200OK signaling message, the conversation between A and C receives a BYE instruction message before the conference is created, and a service records the call ticket of the conversation between A and C before the conference is created;

and S8, ending the conference, and presenting a ticket by the AS.

Further, the a is a calling subscriber, the B and C are called subscribers, and the called subscriber is a real called number in the S3.

Further, the Refer-to header field in the Refer message in S5 carries a parameter call ID carrying the session ID in the a and B trigger message Invite.

Further, when the AS sends a REFER signal to the AGCF in S5, the Replaces parameter is replaced by the AS sending the called number invite carrying session information of B of call id.

Further, the Refer-to header field in the Refer message in S7 carries a parameter call ID carrying the session ID in the a and C trigger message Invite.

Further, when the AS sends a REFER signal to the AGCF in S7, the Replaces parameter is replaced by the AS sending the called number invite carrying the session information of C of call id.

Further, the call tickets in S8 include call tickets a and B before the conference is created, call tickets a and C before the conference is created, call tickets a and B after the conference is joined, and call tickets a and C after the conference is joined.

The invention has the beneficial effects that: 1. the technology deployment, evolution and reconstruction cost is low; 2. easy-to-use operation of a user is realized; 3. the problem that charging cannot be separated is solved; 4. media conference resources are saved; 5. the existing architecture and the triggering sequence of the telecommunication network are not changed, and the method is more practical and efficient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a signaling interaction flowchart of a three-way call method based on a Volte network according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

As shown in fig. 1, according to the embodiment of the present invention, a three-party call method based on a Volte network includes:

s1, dialing B, AGCF (Access Gateway Control function) triggering VPN (virtual Private network) service AS (application Server) platform, wherein the triggering message Invite carries the parameter call ID of the session ID. The calling number is defined AS leg1, the AS issues the called number invite carrying call id and is defined AS leg2, the AGCF sends the call to the MMTel, and the call with the calling number changing function is triggered to the AS platform again by the MMTel to carry out the number changing process and is in AB communication;

s2, A calls C by operating the clapping fork B after keeping the call of B, and triggers the call flow of C by A, wherein the call flow is in AC call;

s3, after A crosses 3, BC listens to the hold tone, a conference is established, invite applying for the multi-party call resource is sent to AS, the called number in the message is mmtel without the real called number of the user, and the format is AS follows: mmtel @ conf-factor. ims. mnc011.mcc460.3gpp network.org SIP/2.0;

s4, AS transmits the application message to MMTel, and the multi-party call media applied by MMTel returns 200OK signaling message;

s5, after receiving the ACK message, the AGCF replies an ACK confirmation message and downwardly indicates to modify the media type of A, after receiving the media modification response, the AGCF sends a Refer signaling message to the AS, wherein the Refer signaling message carries Replaces parameters and indicates to add the user B to the conference, and a Refer-to head domain in the Refer message carries leg1 session information; (leg 1, from-tag, to-tag of AB)

S6, when the AS sends a refer message to the AGCF, the replace parameter is replaced by B number session information (call id = leg2, to-tag and from-tag) of leg2, the MMTel carries out session association, finally the B is successfully pulled into the conference, the AS starts to charge the AB after receiving NOTIFY 200OK, meanwhile, the AB session receives a BYE message, and a service records a ticket of the AB call before entering three parties;

s7, when an AS receives a message that a Refer pull C number enters a meeting, a Refer-to head domain in the Refer message carries leg1 session information (leg 1, from-tag and to-tag of an AC), when the AS sends the Refer message to the AGCF, a replace parameter is replaced by C number session information (clipped = leg2, to-tag and from-tag) of the leg2, MMTel carries out session association, the C is successfully pulled into the meeting finally, the AS starts to charge the AC after receiving NOTIFY 200OK, meanwhile, the AC session receives a BYE message before, and a service record enters a ticket of an AC call before three parties;

s8, when the three parties end, the AS will give out 4 call tickets, the call ticket includes: the method comprises the steps of A to B and A to C ticket before a conference is added, and A to B and A to C ticket after the conference is added.

The following can be achieved by the method:

on the premise of not modifying the core network program and MMTEL triggering sequence, only performing service upgrading modification on the intelligent network plane;

the MMTEL of the service side signs a contract twice, realizes call charging for the first time and solves the charging problem; the call number changing is realized for the second time;

unnecessary conference resources are not occupied, and a conference is established in real time during the call.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A three-party call method based on a Volte network is characterized by comprising the following steps:

s2, A calls with B in a hold state by operating a clapping fork B, and A dials C to trigger the call flow of A and C, wherein A and C are in call;

s3, A listens to the hold tone by operating the clapping fork C, B and C, and is in a hold state at the same time, A creates a conference and sends invite applying for multi-party call resources to the AS platform;

and S8, ending the conference, and presenting a ticket by the AS.

2. The method as claimed in claim 1, wherein a is a calling party, B and C are called parties, and the called party is a real called number in S3.

3. The three-party calling method based on the Volte network as claimed in claim 1, wherein the Refer-to header in the Refer message in S5 carries call ID parameter (call ID) in the A and B trigger message Invite.

4. The three-party calling method based on the Volte network AS claimed in claim 1, wherein when the AS sends a REFER signal to the AGCF in S5, the Replaces parameter is replaced by the AS sending session information of B with call id carried by called number invite.

5. The three-party calling method based on the Volte network as claimed in claim 1, wherein the Refer-to header in the Refer message in S7 carries call ID parameter call ID in the A and C trigger message Invite.

6. The three-party calling method based on the Volte network AS claimed in claim 1, wherein when the AS sends a REFER signal to the AGCF in S7, the Replaces parameter is replaced by the AS sending session information of a C with call id carried by called number invite.

7. The three-party calling method based on the Volte network as claimed in claim 1, wherein the phone bill in S8 includes a phone bill A and a phone bill B before the conference is created, a phone bill A and a phone bill C before the conference is created, a phone bill A and a phone bill B after the conference is joined, and a phone bill A and a phone bill C after the conference is joined.