JPH0657001B2 - Call connection / disconnection method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of call connection and call disconnection, for example, when a plurality of terminals at multiple points hold a conference by multipoint communication.

“Conventional technology” Conventionally, call connection between any two points in multipoint communication,
With regard to call disconnection, connection / connection / disconnection / disconnection / disconnection management was not performed, and call connection / call disconnection was possible from any of the connected terminals.

This conventional method does not manage the priority relationship of call connection / disconnection in multipoint communication, so the connection format is star type, and the connection relationship is centrally managed at the nodes, that is, the call connection direction, call There is no problem if the disconnection direction is known, but if the multipoint connection type is a mesh type, for example, as shown in FIG. 11, terminals A, B, C,
When D is in a conference call, terminal D autonomously calls 1
When disconnecting 03, 105, 106 and leaving the conference, terminals A, B, and C can recognize the disconnection between their own terminals and terminal D, respectively, but terminal D can communicate with other terminals. There was a problem that I could not grasp the fact that it ended. That is, for example, there is a problem that the terminal A cannot grasp whether the terminal D has left the conference or has disconnected only the connection with the terminal A.

An object of the present invention is to provide a call connection / disconnection method capable of grasping a connection / disconnection relation of another terminal in each terminal in multipoint communication in which the connection form is a mesh type.

[Means for Solving the Problem] According to the present invention, the priority relationship of connection / disconnection of calls among all participating terminals is managed by a specific terminal, and the specific terminal displays the same information indicating the terminal priority. Notifying all participating terminals, all participating terminals grasp the connection direction and disconnection direction of the call between all participating terminals from the received information indicating the terminal priority, and all participating terminals connect / disconnect the call from a specific terminal. In response to the disconnection notification, the call is connected / disconnected to the terminal whose terminal priority is lower than the own terminal.

[Example] Hereinafter, the method of the present invention will be specifically described with reference to the drawings. Figure 1 shows the connection status at the start of multipoint communication. Assuming that a specific terminal, that is, a terminal that manages a priority relationship regarding call connection / disconnection, terminal A first performs 201, for all terminals B, C, D to participate in order to perform multipoint communication. Call connections are made in the directions indicated by 202 and 203, respectively. Next, the connected communication paths 201, 202, 20
3, the terminal priority management table shown in FIG.
Copy and send. At this time, the terminal A also has the same terminal priority management table.

Upon receiving this management table, each terminal checks the connection status with the terminal whose priority is lower than the own terminal in the permutation of the contents of this management table, and if not connected, the call connection is established. When the disconnection request is received, the call between the terminal having a lower priority than the own terminal is disconnected based on the terminal priority management table of each terminal. Management of this management table,
Transmission is limited to specific terminals. The transmission of the management table is only triggered when the connection state of the call for multipoint communication is changed or when the terminal having the table management right is changed.

Therefore, the terminals B and C which have received the terminal priority management table shown in FIG. 2 are respectively 404 and 40 of FIG.
The call is connected in the directions indicated by 5, and 406.

Next, a call connection situation when the terminal E is added to the multipoint communication during communication will be described. After the terminal A makes a call connection with the terminal E in the direction indicated by 507, the communication path 507
For example, as shown in FIG. 5, a terminal priority management table in which E is inserted between A and B in the management table shown in FIG. 3 is created, and this is created as terminals B, C, D and E. Send to. Upon receiving this, the terminal E makes a call connection to a terminal lower than its own terminal as shown in FIG. Terminals B and C
Has already been connected to its lower terminals, there is no connection processing for the communication paths 701 to 707.

On the other hand, at the time of disconnection, for example, when only the terminal C leaves the multipoint communication, the terminal C notifies the terminal A of leaving. For example, as shown in FIG. 7, the terminal A redistributes the terminal priority management table in which C is the highest level, and then issues a disconnection request (leaving permission) to the terminal C. Terminal C
In accordance with the management table shown in FIG. 7, 902, 904, 90
The call is disconnected in the direction of 6,909. On the other hand, the terminal A redistributes the terminal priority management table shown in FIG. 9 to the terminals B, D and E.

Following this situation, when ending all communications, terminal A sends a disconnection request to terminals B, D, and E, and each terminal then follows the management table of FIG. A call having a lower priority than the own terminal is disconnected in the directions indicated by arrows 1101 to 1106 in FIG.

[Advantages of the Invention] As described above, according to the present invention, even in multipoint communication in which the connection mode is a mesh type, the priority relationship of call connection / disconnection at a specific terminal is managed, and the same terminal priority is given. The rank management table is sent to all terminals, and each terminal grasps the priority relationship of connection / disconnection related to the call between all terminals participating in communication with the same table, and connects / disconnects the call from a specific terminal. In response to the notification, by connecting / disconnecting the call to a terminal lower than the self terminal, terminal A can grasp the connection / disconnection status of all terminals, and inquire to terminal A of other terminals. Can be found by

[Brief description of drawings]

FIG. 1 is a diagram showing a call connection direction at the start of multipoint communication in an embodiment of the present invention, FIG. 2 is a diagram showing a terminal priority management table, and FIG. 3 is a call based on the management table of FIG. FIG. 4 shows a connection direction, FIG. 4 shows a call connection direction when a communication participant is added midway, FIG. 5 shows a terminal priority management table, and FIG. 6 is based on the management table of FIG. FIG. 7 is a diagram showing a call connection direction when a communication participant is added midway, FIG. 7 is a diagram showing a terminal priority management table, and FIG. 8 is a diagram showing a call disconnection direction at the time of leaving midway based on the management table of FIG. 9 is a diagram showing a terminal priority management table, FIG.
FIG. 0 is a diagram showing the call disconnection direction at the end of all communications based on the management table shown in FIG. 9, and FIG. 11 is a problem when the conventional call connection / call disconnection method is applied to mesh type multipoint communication. It is a figure which shows a point.

Claims (1)

[Claims] 1. In a multipoint communication in which a connection type is a mesh type, a specific terminal manages a priority relation of call connection / disconnection between all participating terminals of the multipoint communication, and the specific terminal is The same information indicating the terminal priority is notified to all the participating terminals, and all the participating terminals grasp the connection direction and disconnection direction of the call between all the participating terminals from the received information indicating the terminal priority, and Participating terminals connect / disconnect calls to terminals whose terminal priority is lower than their own terminal in response to a call connection / disconnection notification from the specific terminal.
Cutting method.