KR101013944B1 - Method and system for hierarchical multipoint communication - Google Patents

Abstract

The present invention relates to a hierarchical multilateral communication method and system. According to one aspect of the present invention, a hierarchical multi-party communication system is provided. According to an embodiment of the present invention, in a hierarchical multi-party communication system, a connection request terminal and a connection request message that transmits a connection request message to any terminal connected to the hierarchical multi-party communication, and receives a list of connection terminals from the arbitrary terminal. When the connection request message is received from the request terminal, the connection response terminal for generating the connection terminal list and providing the connection request terminal to the connection request terminal using an average media delay value corresponding to each terminal connected to the hierarchical multilateral communication. The terminal may be provided with a hierarchical multi-party communication system comprising any terminal for receiving the connection request message.

Communication, multi-party, conference

Description

Hierarchical multi-party communication method and system {METHOD AND SYSTEM FOR HIERARCHICAL MULTIPOINT COMMUNICATION}

The present invention relates to hierarchical multi-party communication, and more specifically hierarchical conference which can configure multi-party conference to minimize conference average media delay while maintaining minimum conference time when new terminal is connected to hierarchical multi-party communication (conference). A multi-party communication method and system.

The ubiquitous environment aims to establish an environment in which communication and computing services can be provided at any time and any place without restriction of time and space. Multilateral communication technology is one of the basic technologies for various services in the ubiquitous environment.

1 and 2 are diagrams for explaining a multi-party communication method according to the prior art.

1 and 2, in the multi-party communication operating in the ubiquitous environment, most of the participants' wireless terminals are concentrated in one or two wireless networks.

In the case of using a communication server for multi-party communication in a ubiquitous environment, wireless terminals of communication participants located near each other use a relatively remote communication server.

In the ubiquitous environment, when the multi-party communication is configured in a centralized manner as shown in FIG. 1, the communication form may be inefficient because all participants' media are processed at a remote communication server.

In addition, when configuring communication in a distributed manner as shown in FIG.

Therefore, an alternative method of terminal mixing without using a communication server may be an alternative to multi-party communication using a communication server in a ubiquitous environment.

While there are many advantages in applying such a terminal blending method to a ubiquitous environment, a media delay may increase according to the connection configuration of a terminal of a communication participant.

An object of the present invention is to configure a connection to minimize average media delay time while maintaining a minimum conference time when a new terminal joins hierarchical multi-party communication.

It is also an object of the present invention to provide a new terminal with a terminal list that can minimize the average media delay time.

According to one aspect of the present invention, a hierarchical multi-party communication system is provided.

According to an embodiment of the present invention, in a hierarchical multi-party communication system, a connection request terminal and a connection request message that transmits a connection request message to any terminal connected to the hierarchical multi-party communication, and receives a list of connection terminals from the arbitrary terminal. When the connection request message is received from the request terminal, the connection response terminal for generating the connection terminal list and providing the connection request terminal to the connection request terminal using an average media delay value corresponding to each terminal connected to the hierarchical multilateral communication. The terminal may be provided with a hierarchical multi-party communication system comprising any terminal for receiving the connection request message.

The connection response terminal generates a calculation unit for calculating an average media delay value corresponding to a candidate terminal which is each terminal connected to the hierarchical multi-party communication, and generates a connection terminal list in which candidate terminals are listed in order of decreasing average media delay value. It may include a control unit for controlling to provide to the connection request terminal.

The calculator may configure a logical connection between the candidate terminal and the connection request terminal, and calculate an average media delay value by calculating an average number of hops between terminals in the configured logical connection.

The calculator may calculate an average media delay value corresponding to the candidate terminal using the following equation.

는 상기 G에 포함된 단말기의 전체 개수를 나타내고, D(i,j)는 단말기 i와 단말기 j간의 홉수를 나타낸다.Here, i and j each represent a terminal, G is a graph showing a logical connection formed by connecting the connection request terminal and the candidate terminal,

Denotes the total number of terminals included in G, and D (i, j) denotes the number of hops between terminal i and terminal j.

The connection requesting terminal transmits a connection request message to a first candidate terminal using the connection terminal list, and when receiving a connection rejection message, transmits the connection request message to a candidate terminal of a next order and sends a connection permission message. When receiving, it may be connected to a hierarchical multiparty communication.

When the candidate terminal receives the connection request message from the connection request terminal, the candidate terminal may calculate its own connection margin value and transmit a connection permission message to the connection request terminal when the connection margin value is equal to or greater than a reference value.

The candidate terminal calculates a connection margin value using at least one of a performance value of the terminal and the remaining power of the terminal, and the performance value of the terminal is calculated using at least one of CPU performance and memory capacity.

According to another aspect of the present invention, a hierarchical multilateral communication method is provided.

According to an embodiment of the present invention, in a hierarchical multi-party communication method, a) a connection request terminal making a connection request to a connection response terminal, and b) each connection terminal connected to the hierarchical multi-party communication Calculating average media delay values corresponding to candidate candidates; and c) the connection response terminal generates a connection terminal list using the average media delay value, and provides the connection terminal list to the connection requesting terminal. A hierarchical multi-party communication method including the steps may be provided.

The step b) may include configuring a logical connection between the candidate terminal and the connection requesting terminal, and calculating an average media delay value by calculating an average of hop numbers between terminals in the configured logical connection. have.

The connected terminal list is a list in which candidate terminals are listed in order of decreasing average media delay value.

After step c), d) the connection request terminal making a connection request to the candidate terminal using the connection terminal list; and e) the candidate terminal calculates a connection margin to connect the connection request terminal. The method may further include determining.

In the step e), if the candidate terminal has a connection margin value greater than or equal to the reference value, the connection permission message is transmitted to the connection request terminal, and if the connection margin value is less than the reference value, the connection rejection message is sent to the connection request terminal. When the connection request terminal receives the connection rejection message, steps d) and e) may be repeated.

The connection margin value is calculated using at least one of the performance value of the terminal or the remaining power of the terminal, and the performance value of the terminal is calculated using at least one of CPU performance and memory capacity.

According to another aspect of the present invention, a program of instructions that can be executed in an electronic device is tangibly implemented to perform the hierarchical multi-party communication method according to any one of claims 8 to 13. There is provided a recording medium having recorded thereon a program which can be read.

According to the present invention, when a new terminal joins a hierarchical multi-party communication, a connection configuration can be configured to minimize an average media delay time.

In addition, the present invention has an effect that can provide a new terminal with a terminal list that can minimize the average media delay time.

In addition, the present invention is capable of real-time processing of media even when a new terminal is connected to hierarchical multi-party communication, and has an effect of ensuring a minimum conference holding time.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

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

3 is a block diagram schematically illustrating a configuration of a terminal for performing hierarchical multi-party communication according to an embodiment of the present invention. The terminal according to the present invention may be a terminal connected to a hierarchical multilateral communication or a terminal requesting a connection to be connected to a hierarchical multilateral communication. Hereinafter, a terminal requesting a connection to any terminal connected to hierarchical multi-party communication is defined as a connection request terminal, and a terminal receiving a connection request from the connection request terminal is defined as a connection response terminal. When the connection requesting terminal makes a connection request to any terminal connected to hierarchical multi-party communication, any terminal that receives the connection request uses the connection margin value of its own when the connection requesting terminal receives an introduction and attempts to connect. If it determines and attempts to connect without receiving an introduction, it functions as a connection answering terminal. This will be described in more detail with reference to the accompanying drawings below.

Referring to FIG. 3, a terminal according to an exemplary embodiment of the present invention includes a communication unit 310, an input unit 320, a calculation unit 330, a storage unit 340, and a control unit 350.

The communication unit 310 is responsible for data transmission and reception with other terminals through a communication network. That is, the communication unit 310 transmits and receives data with other terminals logically connected.

For example, when the terminal according to the present invention is a connection response terminal, the communication unit 310 may transmit a send message (send REFFER) including a connection terminal list to the connection request terminal under the control of the control unit 350. . Here, the connection request terminal is a terminal requesting a connection in order to be connected to hierarchical multi-party communication.

For example, when the terminal according to the present invention is a connection request terminal, the communication unit 310 transmits a connection request message (send INVITE) to any terminal connected to the hierarchical multi-party communication under the control of the control unit 350, It may receive a send REFFER, a send OK message, or a send DECLINE.

The input unit 320 is a means for receiving various control commands for controlling the operation of the terminal from the user. For example, the input unit 320 may be implemented as a plurality of key buttons (for example, numeric / character keys, * or # symbol keys, and one or more function keys (for example, menu keys, call keys, confirmation keys, etc.). For example, when the terminal according to the present invention is a connection request terminal, the input unit 320 may receive a connection request command from a user and output the same to the controller 350. .

The calculator 330 calculates an average media delay value or a connection margin value.

For example, when the terminal according to the present invention is a connection response terminal, when the connection request message is received from the connection request terminal, the calculation unit 330 for each terminal (including the connection response terminal) connected to the hierarchical multilateral communication. Calculate the average media delay value.

Hereinafter, for convenience of understanding and explanation, a terminal which is a logical connection target of the connection request terminal is referred to as a candidate terminal in order to calculate an average media delay value. Here, the candidate terminal may be any terminal connected to hierarchical multilateral communication.

The average media delay value represents an average value of media delays between terminals when a logical connection is formed by connecting a connection request terminal to a candidate terminal. Here, the media delay represents the number of hops between terminals.

For example, the calculator 330 may calculate an average media delay value using Equation 1 below.

[Equation 1]

는 상기 G에 포함된 단말기의 전체 개수를 나타내고, D(i,j)는 단말기 i와 단말기 j간의 홉수를 나타낸다.Here, i and j each represent a terminal, G is a graph showing a logical connection formed by connecting the connection request terminal and the candidate terminal,

Denotes the total number of terminals included in G, and D (i, j) denotes the number of hops between terminal i and terminal j.

For example, when the terminal according to the present invention is a candidate terminal, the calculator 330 calculates a connection margin value when a connection request message is received from the connection request terminal. The connection margin may be calculated using the performance value of the terminal, the remaining power of the terminal, and the like.

The storage unit 340 stores algorithms, connection graph information, and the like necessary for operating a terminal according to an exemplary embodiment of the present invention. Here, the connection graph information is logical configuration information for hierarchical multi-party communication, and is updated and stored whenever any terminal releases communication or participates in new communication.

The controller 350 controls the internal components of the terminal (for example, the communication unit 310, the input unit 320, the calculation unit 330, and the storage unit 340, etc.) according to an embodiment of the present invention. Do this.

In addition, when the control unit 350 receives a connection request message through the communication unit 310, the controller 350 generates a connection terminal list according to whether the connection request terminal receives an introduction or requests a connection, or connects using a connection margin value. Determine. That is, when the connection requesting terminal receives an introduction and requests a connection, the terminal receiving the connection request may be a candidate terminal. When the connection requesting terminal requests a connection without receiving an introduction, the terminal receiving the connection request receives a connection response. It can be a terminal.

For example, when the terminal according to the present invention is a connection response terminal, the controller 350 generates a connection terminal list using the average media delay value calculated by the calculator 330. The connected terminal list is a list of candidate terminals in order, and the candidate terminals are listed in order of decreasing average media delay value. The controller 350 may generate a message for providing the connection terminal list to the connection request terminal, and control the communication unit 310 to transmit the generated message.

For example, when the terminal according to the present invention is a candidate terminal, the controller 350 determines the connection of the connection request terminal using the connection margin value calculated by the calculator 330. The controller 350 may generate a message for accepting or rejecting a connection in response to the connection request of the connection request terminal, and control the communication unit 310 to transmit the generated message.

For example, when the terminal according to the present invention is a connection request terminal, the control unit 350 connects to any terminal or candidate terminal connected to hierarchical multilateral communication when a connection request command is input from the user through the input unit 320. The control unit 310 may generate a message for requesting the request and transmit the generated message.

This will be described in more detail with reference to the accompanying drawings below.

4 is a flowchart illustrating a method in which a connection request terminal is connected to hierarchical multi-party communication according to an embodiment of the present invention. More specifically, FIG. 4 is a flowchart illustrating a method in which a connection request terminal receives a list of connection terminals from a connection response terminal and connects to hierarchical multi-party communication.

In step S410, the connection request terminal requests a connection to the connection response terminal. Here, the connection answering terminal may be any terminal among terminals connected to hierarchical multi-party communication. The connection request terminal is a terminal to be connected to hierarchical multi-party communication.

In step S420, the connection response terminal calculates an average media delay value corresponding to each terminal (including the connection response terminal) connected to the hierarchical multi-party communication. Here, each terminal may be a candidate terminal. That is, the connection response terminal calculates an average media delay value assuming that a connection request terminal is connected to each candidate terminal. Since the method for calculating the average media delay value for each candidate terminal is the same as described above, duplicate description thereof will be omitted.

In step S430, the connection response terminal generates a connection terminal list using the calculated average media delay value, and provides the generated connection terminal list to the connection request terminal. The connected terminal list is a list of candidate terminals in order of decreasing average media delay value. If the average media delay value of the connection response terminal is minimum, the terminal calculates its connection margin value and determines whether the connection margin value is equal to or greater than a preset reference value (eg, 0). If the connection margin value of the connection response terminal is greater than or equal to the reference value, the connection request terminal is allowed to connect. When the connection margin value of the connection response terminal is less than or equal to the reference value, the list is provided to the connection request terminal except for the connection response terminal in the connection terminal list.

For example, the connection response terminal provides the connection terminal list to the connection requesting terminal by using a preset send message.

In step S440, the connection request terminal requests a connection to the candidate terminal using the provided connection terminal list. That is, the connection request terminal requests a connection to the candidate terminal in the order shown in the connection terminal list.

For example, the connection request terminal transmits a connection request message (send INVITE) to the candidate terminal.

In operation S450, the candidate terminal receiving the connection request calculates its own connection margin value and determines whether the connection margin value is equal to or greater than a preset reference value (eg, 0).

In order to facilitate understanding and explanation, a method of calculating a connection margin value in a candidate terminal that has received a connection request will first be briefly described. As described above, the present invention presupposes a hierarchical multi-party communication in a ubiquitous environment. Accordingly, the candidate terminal receiving the connection request may calculate a connection margin value by using the performance value (eg, CPU performance, memory capacity, etc.) of the terminal and the remaining power of the terminal. In addition, the connection margin value should be determined in consideration of the minimum conference holding time. The minimum meeting maintenance time is the minimum time required to proceed with the meeting and is related to the remaining power of the terminal.

For example, when a new terminal is connected to the terminal, the connection margin value may be calculated in consideration of whether the terminal can perform real-time processing of audio or video data according to a request of the new terminal. In addition, when a new terminal is connected to the terminal, the power consumption of the terminal increases, and since the usage time of the terminal differs according to the remaining power of the terminal, the minimum conference time for multi-party communication calculated as the remaining power of the terminal is maintained. The connection margin can be calculated in consideration of the possibility.

In the present specification, since it is assumed that the wireless environment, the remaining power of the terminal is considered when calculating the connection margin value, but it is natural that the power may be excluded from consideration when the environment of the terminal is a wired environment.

The candidate terminal receiving the connection request may calculate the connection margin value by various methods.

As a result of the determination in step S450, if the connection margin value of the candidate terminal is greater than or equal to the reference value, the candidate terminal receiving the connection request in step S470 allows the connection.

For example, the candidate terminal sends a connection OK message (send OK) to the connection request terminal. Accordingly, the connection request terminal is connected to the candidate terminal, thereby connecting to hierarchical multi-party communication with a newly subscribed terminal.

As a result of the determination in step S450, if the connection margin value of the candidate terminal is not equal to or greater than the reference value, the candidate terminal that receives the connection request in step S470 rejects the connection. Then, step S440 and step S450 are repeated.

For example, the candidate terminal transmits a connection DECLINE to the connection request terminal. Accordingly, the connection request terminal deletes the candidate terminal information for rejecting the connection from the connection terminal list. In addition, the connection request terminal may request a connection to a candidate terminal of a next rank.

5A through 5P are diagrams for explaining a communication connection of a hierarchical multi-party communication system according to an embodiment of the present invention.

For convenience of understanding and explanation, it is assumed that the logical connection for hierarchical multi-party communication is configured in the form of a graph as shown in FIG. 5A, and it is assumed that the terminal desired for communication connection is the J terminal 555. Let's do it.

The J terminal 555 makes a connection request to the A terminal 510 as shown in FIG. 5A.

The terminal A 510 is each terminal (terminal A 510, terminal B 515, terminal C 520, terminal D 525, terminal E 530, terminal F 535 connected to the hierarchical multi-party communication). ), The G terminal 540, the H terminal 545, the I terminal 550, and the connection request terminal (the J terminal 555) are configured, and an average media delay value is calculated. For convenience of understanding and explanation, each terminal (terminal A 510, terminal B 515, terminal C 520, terminal D 525, terminal E 530) connected to hierarchical multi-party communication, Terminal F (535), terminal (G) 540, terminal H (545), and terminal I (550) are referred to as candidate terminals, and will be described later.

5B to 5J, candidate terminals (terminal A (510), terminal B (515), terminal C (520), terminal D (525), terminal E (530), terminal (530), terminal F (535), and terminal (540). An example of configuring a logical connection between the H terminal 545, the I terminal 550, and the connection request terminal (the J terminal 555) is illustrated. That is, referring to FIG. 5B, a logical connection between the terminal A 510 and the terminal J 555 is configured, and an average media delay value between the terminals is calculated. 5C to 5J, the remaining candidate terminals (B terminal 515, C terminal 520, D terminal 525, E terminal 530, F terminal 535, and G terminal ( 540, H terminal 545, and I terminal 550 are also calculated for the average media delay value between the terminals.

Referring to FIG. 5K, candidate terminals (terminal A 510, terminal B 515, terminal C 520, terminal D 525, terminal E 530, terminal F 535, and terminal 540) And median media delay values for the H terminal 545 and the I terminal 550 are calculated as 2.49, 2.58, 2.58, 2.59, 2.71, 2.71, 2.71, 2.71, and 2.74. Since the method for calculating the average media delay value has already been described above, duplicate description thereof will be omitted.

The terminal A 510 generates a connection terminal list according to the average media delay value of the candidate terminal. The connected terminal list is a list of candidate terminals in order of decreasing average media delay value. Candidate terminals having the same average media delay value may be randomly listed in the connection terminal list. For convenience of understanding and explanation, as shown in FIG. 5L, the sequence of candidate terminals shown in the connected terminal list is assumed to be “B, C, D, E, F, G, H, I”. This will be described.

The terminal A 510 transmits a message including the connection terminal list to the terminal J 555, as shown in FIG. 5L.

The J terminal 555 provided with the connection terminal list transmits a connection request message to the candidate terminals in the order shown in the connection terminal list.

As illustrated in FIG. 5M, the J terminal 555 transmits a connection request message to the B terminal 515, which is the first terminal of the connected terminal list, and receives a connection rejection message from the B terminal 515. Here, the terminal B 515 determines that its connection margin value is less than a preset reference value, and transmits a connection rejection message to the terminal J 555. For convenience of understanding and explanation, as illustrated in FIG. 5M, candidate terminals having a connection margin greater than or equal to a reference value are selected by the D terminal 525, the E terminal 530, the F terminal 535, and the I terminal 550. Assuming that the candidate terminal having a connection margin value less than the reference value is A terminal 510, B terminal 515, C terminal 520, G terminal 540, and H terminal 545, the following procedure will be described. Let's do it.

As illustrated in FIG. 5N, the J terminal 555 deletes the first terminal B, 515 from the list of connected terminals, transmits a connection request message to the next terminal C, 520, and the C terminal 520. Receive a connection rejection message.

As illustrated in FIG. 5O, the J terminal 555 deletes the second terminal C, 520, from the list of connected terminals, transmits a connection request message to the next terminal D, 525, and the D terminal 525. Receive a connection permission message. Thus, the connection request terminal (terminal J) 555 is connected to the terminal D 525 for hierarchical multi-party communication. 5P illustrates a graph in which the J terminal 555, which receives the list of the connected terminals from the A terminal 510, is connected to the D terminal 525. FIG.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 and 2 are views for explaining a multi-party communication method according to the prior art.

3 is a block diagram schematically illustrating a configuration of a terminal for performing hierarchical multi-party communication according to an embodiment of the present invention.

4 is a flowchart illustrating a method in which a connection request terminal is connected to hierarchical multi-party communication according to an embodiment of the present invention.

5A through 5P are diagrams for explaining a communication connection of a hierarchical multi-party communication system according to an embodiment of the present invention.

Claims (14)

In a hierarchical multi-party communication system, A connection request terminal which transmits a connection request message to any terminal connected to a hierarchical multi-party communication, and receives a connection terminal list from the arbitrary terminal; And When the connection request message is received from the connection request terminal, the connection response terminal for generating the connection terminal list using the average media delay value corresponding to each terminal connected to the hierarchical multi-party communication and providing the connection request terminal to the connection request terminal. Connection answering terminal is any terminal that receives the connection request message. The method of claim 1, The connection response terminal A calculator configured to calculate an average media delay value corresponding to the candidate terminals which are respective terminals connected to the hierarchical multi-party communication; And And a controller for generating a connection terminal list in which candidate terminals are listed in order of decreasing average media delay value and providing the connection terminal list to the connection request terminal. The method of claim 2, The calculation unit And constructing a logical connection between the candidate terminal and the connection requesting terminal, and calculating an average media delay value by calculating an average number of hops between the terminals in the configured logical connection. The method of claim 3, And the calculating unit calculates an average media delay value corresponding to the candidate terminal by using the following equation.

Here, i and j each represent a terminal, G is a graph showing a logical connection formed by connecting the connection request terminal and the candidate terminal,

Represents a total number of terminals included in the G, and D (i, j) represents the number of hops between the terminal i and the terminal j. The method of claim 1, The connection requesting terminal transmits a connection request message to a first candidate terminal using the connection terminal list, and when receiving a connection rejection message, transmits the connection request message to a candidate terminal of a next order and sends a connection permission message. And upon receipt, connected to the hierarchical multi-party communication system. The method of claim 5, When the candidate terminal receives the connection request message from the connection request terminal, it calculates its own connection margin value, and if the connection margin value is more than the reference value layer characterized in that for transmitting the connection permission message to the connection request terminal. Ever multilateral communication system. The method of claim 6, The candidate terminal calculates a connection margin value using any one or more of a performance value of the terminal or the remaining power of the terminal, and the performance value of the terminal is a value calculated using any one or more of CPU performance or memory capacity. Hierarchical multilateral communication system. In the hierarchical multilateral communication method, a) requesting a connection from the connection request terminal to the connection response terminal; b) respectively calculating, by the connection answering terminal, an average media delay value corresponding to the candidate terminal which is each terminal connected to the hierarchical multi-party communication; And c) generating, by the connection answering terminal, the connection terminal list using the average media delay value, and providing the connection terminal list to the connection requesting terminal. The method of claim 8, B), Establishing a logical connection between the candidate terminal and the connection request terminal; And And calculating an average media delay value by calculating an average number of hops between terminals in the configured logical connection. The method of claim 8, And the connection terminal list is a list in which candidate terminals are listed in order of decreasing average media delay value. The method of claim 8, After step c), d) the connection request terminal making a connection request to the candidate terminal using the connection terminal list; And e) determining, by the candidate terminal, whether to connect the connection request terminal by calculating a connection margin value. The method of claim 11, Step e), If the candidate terminal is greater than or equal to the reference value, the connection allowance message is sent to the connection request terminal, and if the connection margin is less than the reference value, a connection rejection message is sent to the connection request terminal, If the connection request terminal receives the connection rejection message, repeating steps d) and e). The method of claim 11, The connection margin value is calculated using at least one of the performance value of the terminal or the remaining power of the terminal, and the performance value of the terminal is a value calculated using at least one of CPU performance or memory capacity. Ever multilateral communication method. A program of instructions that can be executed in an electronic device is tangibly implemented to perform the hierarchical multi-party communication method according to any one of claims 8 to 13, and a program that can be read by the electronic device is recorded. Record carrier.

Images