KR970078530A - How to make a three-way call and conference call on a digital cellular mobile telephone switch - Google Patents

Abstract

The present invention relates to a 3-man call and a conference call service method in a mobile telephone exchange in a digital cellular mobile communication network. When only two people make calls, it is possible to maximize the efficiency of the conferencing device, which is a system device of limited capacity, by disconnecting the conferencing device at the main point and changing the call path to the general switch. If the pending subscriber is disconnected while the subscriber is calling the third subscriber, the third subscriber responds and the control subscriber informs the third subscriber of the pause sound when the third subscriber starts the call so that the control subscriber does not become confused The present invention is effective in providing a three-party call and a conference call service by causing a handoff or a three-party call or a conference call service to be initiated during handoff during the processing of a three-party call or conference call service .

Description

How to make a three-way call and conference call on a digital cellular mobile telephone switch

Since this is a trivial issue, I did not include the contents of the text.

FIGS. 3A to 3B are flowcharts showing a pending subscriber disconnection process during an incoming call for three-party call and conference call service according to the present invention, and FIGS. 4A to 4C are flowcharts for a three- FIG.

Claims (4)

A method for three-party call and conference call service in a mobile telephone exchange in a CDAM digital cellular mobile communication system having a mobile terminal, a base station, a control station, a mobile switching center and a subscriber location register, If the subscriber having registered the 3-party call or the conference call service requests the service during the outgoing call or the incoming call, the control subscriber checks whether the 3-party call or conference call service is registered, and if the service registration is performed, the corresponding service process is started The control subscriber and the pending subscriber communicate with each other via the communication device, and then the original call is disconnected, so that the called subscriber is released and the control subscriber and the called subscriber communicate with each other A first process of performing the first process, A second step of performing a disconnection process for the subscriber when the uncontrolled subscriber is disconnected and disconnecting the call path according to the number of non-controlled subscribers remaining in the call; and after the first step, All non-controlled subscribers pending with the request of the control subscriber who are in charge of the control subscriber make multiple calls together, hold the non-controlled subscribers at the request of the control subscriber during the multi-call, and perform the first process of calling another called subscriber, And performing a process when the control subscriber or the non-control subscriber is disconnected. [3] The method as claimed in claim 1, The method as claimed in claim 1, wherein, in the first step, when the control subscriber presses the called subscriber number and makes a service request during a call, the subscriber checks whether the subscriber is a three- A step (1-1) of determining whether the control subscriber is able to make a call by receiving the call information of the control subscriber, and a step (1-1) of judging whether the control subscriber is capable of making a call And a second step of receiving the information from the subscriber's location register and analyzing the roaming number after the subscriber's location number is equal to or greater than the number of the subscriber's network number after analyzing the called number received from the control subscriber As a result, when the location is registered in another mobile telephone exchange, the outgoing call processing is performed, If the location registration is registered in a mobile telephone exchange such as a mobile phone or a mobile phone, the method comprising: a step 1-3 of receiving incoming information from a visitor location register and determining whether a called subscriber is capable of receiving an incoming call; And a paging request when the called subscriber is a mobile subscriber and a paging response requested in the step 1-4 are checked to determine the number of pending non-controlled subscribers, If there is at least one roaming non-controlled subscriber, the call connection between the called subscriber and the conference call device is connected. If there is no pending non-control subscriber, a general call path between the control subscriber and the called subscriber is connected, A step 1-5 of causing the control subscriber to hear a ringing tone, When the new subscriber responds, the ringing tone is cut off. If the uncontrolled subscriber is disconnected during the connection of the optical subscriber, the control subscriber is informed of the pending recovery tone. Then, the pending subscriber count , The control subscriber and the called subscriber are put in a two-party call state, the conference communication apparatus is disconnected while there is no pending subscriber, the normal call path is connected between the control subscriber and the called subscriber, The outgoing call is started through steps 1 to 6, and the outgoing call is started through the routing process to occupy the outgoing call out line and send the incoming call number to the called party. Then, the number of pending controlled non-controlled subscribers is checked, If there is more than one person, the outgoing call is connected to the call between the conference call device. If there is no pending uncontrolled subscriber, A 1-7 step of connecting the public telephone line between the outgoing call outgoing call and the outgoing call outgoing call and storing the incoming call reception information and storing the response to the incoming call in response to the incoming call answer, If the called subscriber is found to be a fixed subscriber, the called subscriber line is searched for by the called number analysis. If the called subscriber is in a pause state, the number of pending non-controlled subscribers is checked. If the number of pending non- If there is no pending uncontrolled subscriber, it connects the control channel between the control subscriber and the called subscriber, and sends a ringback tone to the control subscriber and a call signal to the called subscriber, Step 1 - 8 of cutting off the ringing tone and the call signal and making the response process of the step 1-6 be performed, If a call failure occurs during the 1-8 step process, a beep is heard and the number of pending non-control subscribers is investigated so that a multi-call state is established or a conference call device is disconnected, and a call between a control subscriber and a non- And a first step of terminating the service by terminating the control subscriber call or transferring control through the mobile subscriber control process after connecting the first subscriber terminal and the second subscriber terminal to the first subscriber terminal, . The method as claimed in claim 1, wherein, in the second step, when a pending uncontrolled subscriber is disconnected during the first procedure, the subscriber is disconnected, the number of pending uncontrolled subscribers is checked, And then returning to the process of the first process. [3] The method of claim 3, The method as claimed in claim 1, wherein the third step comprises a step of including the pending non-controlled subscribers at the request of the controlling subscriber in the call connection with the called subscriber in the first procedure, And performs the process of the first process of holding the non-controlled subscribers according to a request of the control subscriber who is in multi-call communication with all the uncontrolled subscribers through the step 3-1 and the step 3-1 and calling another called subscriber And performing a disconnection process of the control subscriber or the non-control subscriber during the multi-call. [3] The method of claim 3 or 3, ※ Note: It is disclosed by the contents of the first application.