JP2949672B2 - Group connection control method for group communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a ring logical connection to provide voice,
Related to a group communication system that simultaneously provides video, text, graphics, and other data.
The present invention relates to a group communication connection control method of a group communication system suitable for easily and efficiently performing a connection change operation to be merged into one group.

[0002]

2. Description of the Related Art Conventionally, a method of forming a physically annular communication path and performing communication is performed by a LAN (Local Area Network, LAN) such as a token ring network.
Local area network) as a basic method. On the other hand, there is a communication network (hereinafter, referred to as a logical connection) in which the form of a logical connection between computers is temporarily set instead of the permanent network. For example, the telephone network has a physically complicated connection form, but when two telephones communicate, the logical connection form is a single line connecting the two telephones.

[0003] A communication mode in which multipoint communication is performed between two or more computers is referred to as "group communication", and a group of computers performing group communication is referred to as "group". The form of the logical connection of the group communication system for performing the group communication includes a form of a "ring" connecting computers in a cascade, a form of a "tree" connecting the rings so as not to form a ring, or a logical connection in any combination. There is a form of "mesh" and the like. Here, the advantage of the method of forming an annular shape is that
Basically, the number of connections to each computer is only two. As a group communication system using such a circular logical connection, for example, ASSOCI
Material A "Information Processing Society of Japan 41st National Convention 5Q-
1 "is known. As a connection control method for a group communication system based on a ring connection, the following four groups of function operations are generally used. (1) One group is formed by a plurality of computers. (2) One computer is added to one group. (3) Remove one computer from one group. (4) Dissolve a certain group. In order to facilitate a detailed description of such a connection change operation, terms are determined as follows.

In general, when n computers are connected in a ring to form a group X, one of the computers is designated as X ₁ without loss of generality, and is directed to any direction of the ring. And each computer
X ₁ ,. . . , Xn. When the value exceeds the range of the subscript value, the modulo operation is performed modulo the total number n of the computers. For example, Xn + 1 is replaced with X _1. Also, each computer Xi has two communication channels B ₁ ,
It shall B ₂ are attached, each of the communication channels stick to Xi computer Xi (B _1), indicated as Xi (B _2). The ring connection is realized by connecting Xi (B ₂ ) and Xi + 1 (B ₁ ) to all i.

By doing so, the above-mentioned (1) to (4)
The connection change operation for realizing the above function may be specifically configured as follows. (1) Computer X ₁ ,. . . , Xn, X ₁ (B ₂ ) and X ₂ (B ₁ )
while,. . . , Xi (B ₂ ) and Xi + 1 (B ₁ ),. . . , Xn (B
₂ ) and establish a connection between X ₁ (B ₁ ), respectively. (2) Groups X ₁ ,. . . , Xn to add one computer Xadd between Xi and Xi + 1, Xi (B ₂ ) and Xi
The connection between +1 (B ₁ ) is released, and between Xi (B ₂ ) and Xadd (B ₁ ),
And establishes Xadd (B ₂₎ and Xi + ₁ (B 1) connected between each. However, because the subscripts are for convenience, additional computers can be inserted anywhere in the ring. (3) To remove one computer Xi from the group, it is necessary to remove Xi-1 (B ₂ ) and Xi (B ₁ ) and Xi (B ₂ ) and X
Open the connection between i + 1 (B ₁ ) and Xi-1 (B ₂ ) and X
Establish a connection between i + 1 (B ₁ ). (4) X ₁ (B ₂ ) and X ₂ (B ₁ )
while,. . . , Xi (B ₂ ) and Xi + 1 (B ₁ ),. . . , Xn (B
The connection between ₂ ) and X ₁ (B ₁ ), that is, all connections are released.

Hereinafter, the operations (1) and (2) will be described with reference to the drawings.

FIG. 6 is an explanatory diagram showing a group forming operation method of a conventional group communication system.

This group communication system is an ISDN
(Integrated Services Digi
tal Network, a service integrated digital communication network), which is composed of a computer device for group communication having a basic interface of a network, and performs a group formation operation as follows. Hereinafter, the respective computer devices, computer _{X 1 101, X 2 102,} X 3
103 (described as X ₁ , X ₂ , and X ₃ respectively in the figure).

[0009] As shown in FIG. 6 (a), first, the user of the computer X ₁ 101 is a computer X ₁ 101,
And instructs the connection request to the computer X ₂ 102, computer X ₁ 101 notifies the connection request 60 to the computer X ₂ 102 via the D channel. Then, the user of the computer X ₂ 102 knows that there was from the computer X ₁ 101 a connection request 60, and instructs the connection permission to the computer X ₂ 102. Computer X ₂ 102 communicates with computer X ₁ via the D channel.
Information exchange with 101 is performed. Then, as shown in FIG. 6B, the computers X ₁ 101 and X ₂ 102 transmit two B channels between the computers X ₁ 101 and X ₂ 102, that is, X ₁ ( B ₂ ) and X ₂ (B ₁ )
And establish a connection between X ₁ (B ₁ ) and X ₂ (B ₂ ), respectively. In this manner, computer X ₁ 101, X ₂
A group consisting of two computers 102 is formed, and communication between the _two computers X ₁ 101 and X ₂ 102 becomes possible.

[0010] In this state, the user of the computer X ₁ 101 or X ₂ 102 is Santai th computer X ₃ 1
03 is requested. Here, FIG.
(C), the assuming that the user of the computer X ₁ 101 instructs the connection request, the computer X ₁
101 is a third computer X via the D channel
_{3 A} connection request 61 is notified to 103. Computer X ₁ 1
Computer X ₃₁ that has received the connection request 61 from
03 instructs the computer X ₃ 103 to permit connection. Computer _{X 1 101, X 2 102,} X 3 1
03 exchange information with each other via the D channel, release the connection between X ₁ (B ₂ ) and X ₂ (B ₁ ), and
₁ (B ₂ ) and X ₃ (B ₁ ) connection, and X ₃ (B ₂ ) and X ₂ (B ₁ )
Establish each connection. Thus, the three computers X ₁ 101, X ₂ 102, and X ₃ 103
It is connected in a ring using the B channel of the DN, and it becomes possible to execute group communication by three units.

[0011]

With the diversification and sophistication of application programs related to group communication, the necessity of connection control for further merging existing groups into one group arises. In such a case, for example, a connection change operation for merging two groups into one
Using the above four operation groups, the above (4) and (1)
There is no other way than to regroup the group using or to combine (3) or (4) with (2) to dissolve one group and join the other. However, in such a method, there is a problem that as the number of computers forming the group increases, the trouble of setting and releasing the logical connection required for the connection change increases. SUMMARY OF THE INVENTION An object of the present invention is to provide a group communication system capable of solving these problems of the related art and performing a connection change operation for merging a plurality of groups into one group easily and efficiently in a group communication system. An object of the present invention is to provide a group connection control method.

[0012]

In order to achieve the above object, a group connection control method for a group communication system according to the present invention comprises: (1) communicating two or more computers capable of simultaneously communicating with a plurality of partner computers; In a connection control method of connecting a plurality of groups of a group communication system that performs multipoint communication between computers in the group by connecting the groups at times with a ring logical connection, Based on a request for merging the first group and the second group sent from the first computer which is one of the components of the group to the second computer which is one of the components of the second group, If the first group is composed of three or more computers, the first computer may be the first computer in the first group. Opening the connection between the adjacent third computer, when the first group consists of two computers is to open one of two of the connection between the third computer, When the second group is composed of three or more computers, the second computer releases the connection between the second computer and the fourth computer adjacent to the second computer in the second group. If your group consists of two computers,
Releasing one of the two connections to the fourth computer, and the first computer establishing a connection between the fourth computer, and the second computer
When establishing a connection between the third computer and reconfiguring all the computers constituting the first group and the second group into one group, the first computer as the merge request source
The second computer to which the merge request is made is the same group.
Judge whether the group is in the loop or not, and
Based on the determination result, the request for the merge
Sending, and a first group and a second group
From each computer in any group, including
Each merge request is given a priority and this priority
Multiple mergers that occurred within the same group based on priorities
The processing order of the request decided characterized Rukoto.

[0013]

( 2 ) In the group connection control method for a group communication system according to the above ( 1 ), the first group and the second group are determined while the first computer determines the group of the second computer. A new group merge request for at least one of
Issued from any group of computers, including the group of the second group and the second group, the computer of the new group merge request destination receives the priority given to other merge requests in the same group, and the new group merge request. The new group merge request is compared with the priority assigned to the merge request, and based on the priority, the computer that has requested the new group merge is notified of the acceptance or suspension of the connection change operation based on the new group merge request, and the same group is notified. The processing order of a plurality of connection change operations within the group is determined based on the priority order.

( 3 ) In the group connection control method for a group communication system according to the above ( 2 ), the computer of the new group merge request destination is a computer in which the new group merge request is another group merge request within the same group. If the priority is lower than the priority of the new group merge request, the new computer is immediately notified of the suspension of the connection change operation based on the new group merge request. If the priority is higher than the merge request of the same group, after the determination of the processing order of the connection change operation based on the other merge requests in the same group, the new group merge request source computer is notified of the new group merge request. It is characterized by notifying the reception of a connection change operation based on the connection change operation.

( 4 ) In the group connection control method for a group communication system according to any one of ( 1 ) to ( 3 ), the priority of the merge request is assigned based on the order of occurrence of each merge request. It is characterized by the following.

( 5 ) In the group connection control method for a group communication system according to any one of the above ( 1 ) to ( 3 ), the priority of the merge request is determined in advance by each of the merge requesting computers. It is characterized by giving based on the priority given.

[0018]

According to the present invention, for example, two groups _{(X 1,., Xi,} Xi + 1, .., Xn and Y _1, .., Yj,
Yj + 1,. . , Ym) exist, and when the groups are merged, any computer Xi requesting the merge is connected with:
The following operation is performed on each of the computer Xi + 1 adjacent to the computer Xi, any computer Yj of the merge request destination, and the computer Yj + 1 adjacent to the computer Yj. First, Xi (B ₂₎ and Xi + ₁ (B 1) between,
The connection between Yj (B ₂ ) and Yj + 1 (B ₁ ) is released, respectively, and the connection between Xi (B ₂ ) and Yj + 1 (B ₁ ) and Yj
A connection is established between (B ₂ ) and Xi + 1 (B ₁ ).
After this connection change, X ₁ ,. . . , Xi, Yj +
1,. . . , Ym, Y ₁ ,. . . , Yj, Xi + 1,. . . ,
One ring-connected group arranged in the order of Xn is reconstructed. In this way, the two groups can be merged with a small number of steps.

When a merge request is issued, prior to the connection change operation, it is checked that the two groups to be merged are not the same, and a priority is assigned to each of a plurality of merge requests generated simultaneously. Then, the execution order of each connection change operation is controlled based on the priority. That is, the sequence control is performed so that the connection change operation corresponding to one merge request is completed, and then the operation corresponding to the next request is started. As a result, it is possible to prevent the execution of an extra merge operation, and two or more groups generate two or more merge requests at the same time, and these merge requests result in the respective groups being grouped. Even if they are merged into one common group, the groups can be merged without contradiction.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1A and 1B are block diagrams showing one embodiment of a connection configuration according to the present embodiment of a group communication system using a computer device embodying the present invention.

The group communication system according to this embodiment has an IS
A group communication system using a computer device for group communication having a basic interface of a DN,
As representatively shown in the computer X ₂ 102 in FIG. 1A, each of the computers X ₁ 101~X ₃ 103, Y
₁ 111 to Y ₃ 113 include a group communication application unit 1 that implements a group communication application program and a connection control unit 2 that controls connection between computers. The group communication application unit 1 has two ISDN basic interfaces. Two B
The connection control unit 2 is connected to a communication network via channels (data communication channels) 3 and 4 and a D channel (information channel) 5. Further, the group communication application unit 1 and the connection control unit 2 are both connected to an output device 8 such as a display and an input device 9 such as a keyboard via an output control unit 6 and an input control unit 7.

The computer X ₁ 101 having such a configuration
Based on the conventional technique described with reference to FIG. 6, two groups (X) 11 and (Y) 12 as shown in FIG. 1A are formed by .about.X ₃ 103 and Y ₁ 111 to Y ₃ 113. That is, the group (X) 11 includes the computers X ₁ 101 to
The X ₃ 103 and the group (Y) 12 are respectively composed of computers Y ₁ 111 to Y ₃ 113, and the computers X ₁ 101 to X ₃ 103 and Y _{3
The 1} 111 to Y ₃ 113 are connected in a ring using two B channels. Hereinafter, these two groups (X) 1
1 and (Y) 12, a connection control method according to the present invention, that is, as shown in FIG. 1A, two groups (X) 11 and (Y) each including three computers.
12 into one group (T) 13 as shown in FIG.
The basic process of the connection change operation merged with the above will be described.

FIG. 2 shows the first connection processing operation of the group communication system in FIGS. 1A and 1B according to the present invention.
FIG. 6 is a sequence diagram showing an example of the embodiment.

[0025] In the connected state shown in FIG. 1A, the user of the computer X ₁ 101 is, and instructs the connection request 21 to the computer Y ₁ 111, computer X ₁ 10
1 is connected to the computer Y via the D channel.
₁ 111 is notified of the connection request 14. The user of the computer Y ₁ 111 confirming the receipt of the connection request 14 by the output device instructs the connection acceptance 22 from the input device of the computer Y ₁ 111. Then, the computer X ₁ 101, the computer Y ₁ 111, and the computer X ₁ 101
, A computer X ₂ 102 adjacent thereto, and a computer Y ₁
The respective connection control units of the computer Y ₂ 112 and the adjacent computer Y ₂ 112 perform information exchange 23 to 25 via the D channel.
Perform Then, based on the exchanged information, each connection control unit releases the connection 26 between X ₁ (B ₂ ) and X ₂ (B ₁ ) and the connection between Y ₁ (B ₂ ) and Y ₂ (B ₁ ). Release 27 is performed, and further, connection establishment 2 between X ₁ (B ₂ ) and Y ₂ (B ₁ )
8, and connection establishment 29 between Y ₁ (B ₂ ) and X ₂ (B ₁ ) is performed. As a result, the group (X) 1
1 and (Y) 12, the two groups can be merged into one group (T3) 13 as shown in FIG.

Next, a connection control operation according to the present invention when a plurality of group merge requests are generated simultaneously will be described.

It should be noted that when a plurality of groups are merged into one group, a plurality of merge requests are generated, and if the above-described connection change operation is executed concurrently, the result may not be as expected. Cost. For example, there are three groups X, Y, and Z, each composed of n, m, and l computers, and merged with group X and group Y, merged with group Y and group Z, merged with group Z and group Assume that the three requests for merging X have occurred independently. Here, the first request (group X)
Xi, Xi + 1, Yg,
The connection is changed between Yg + 1, and for the second request (merging of group Y and group Z), Yj, Yj + 1, Z
h, make a connection change between Zh + 1, and for the third request (merge of group Z and group X), Zk,
It is assumed that the connection is changed between Zk + 1, Xf, and Xf + 1.
However, f + 1 <i, g + 1 <j, h + 1 <k. as a result,
The three groups are not merged into one, Xf + 1,. . . ,
Xi, Yg + 1,. . . , Yj, Zh + 1,. . . , Zk, and Xi + 1,. . . , Xn, X _1,. . . , X
f, Zk + 1,. . . , Zl, Z ₁ ,. . . , Zh, Yj +
1,. . . , Ym, Y ₁ ,. . . , Yg.

The reason is that if any two of the three merge requests are merged, the requirements are satisfied, but an extra third merge is executed. In order to solve such a problem, a priority is given to each of a plurality of merge requests generated at the same time, and the execution order of the connection change operation may be controlled based on the priority. That is, for a group of merge requests in which at least one of the groups is set as a common operation target, the connection change operation corresponding to one merge request is completed, and then the operation corresponding to the next request is started. In order to control the order as described above, and in each connection change operation performed sequentially, first, make sure that the two groups to be merged are not the same,
What is necessary is just to perform a connection change operation. Hereinafter, such a connection control method will be described.

FIG. 3 is a flowchart showing a first embodiment of the connection processing operation according to the present invention of the computer device in FIG. 1A.

Particularly, the processing operation when a merge request is issued is shown.
When issuing a merge request, the merge requesting computer first determines the group of merge request destination computers (step 301). If the merge requesting computer is in the same group as the merge requesting computer (step 302), the issue of the merge request is canceled (step 303). In step 302, if the merge request destination computer is in a different group from the merge request source computer, a merge request is issued (step 304). The computer that has received the merge request issued in this way performs the following processing.

FIG. 4 is a flowchart showing a second embodiment of the connection processing operation according to the present invention of the computer device in FIG. 1A.

In particular, FIG. 3 shows the processing operation of the merge request destination computer that has received the issued merge request. When the merge request destination computer receives the merge request (step 401), all the computers in its own group are received. The computer is notified of the reception of the merge request (step 402). The computer in the group waits for a response indicating the presence or absence of another merge request (step 403). If a response indicating that there is no other merge request is obtained (step 404), the merge request source computer receives the merge request. (Step 40)
5). In step 404, if a response indicating that there is another merge request is obtained, the priority assigned to each merge request is compared (step 406). If the priority of the other merge request is high (step 407), the merge requesting computer is immediately notified of the suspension of the merge request (step 408), and the connection change operation based on the other merge request is completed. (Step 409). If the connection change operation based on another merge request is completed (step 41)
0), returning to step 402, and confirming again the acceptance state of the merge request within the group. On the other hand, if the priority of the other merge request is low in step 407, the process waits for a processing result such as acceptance or suspension of another merge request (step 411), and if the result is input (step 41).
2) Notifying the computer that issued the merge request that the merge request has been received (step 405).

As described above, by controlling the processing order of the connection change operation for a plurality of merge requests based on the priority given to each merge request, a plurality of groups can be correctly merged into one group. it can.

FIG. 5 is an explanatory diagram showing a specific example of the second embodiment of the connection control processing according to the present invention of the computer device in FIG. 1A.

Based on the processing operations shown in FIGS. 3 and 4, five computers X ₁ 101 to X ₃ 10
5, three groups (X) 51, (Y) 52, and (Z) 5 consisting of Y ₁ 111 to Y ₃ 115 and Z ₁ 121 to Z ₃ 125
3 are group (X) 51 and group (Y), respectively.
Merging 52, group (Y) 52 and group (Z) 53
And group (Z) 53 and group (X)
51 shows a processing procedure when three independent requests for the merger 51 are made.

[0036] In FIG. 5 (a), the computer X ₁ 1
It is assumed that 01 sends a connection request to the computer Y ₃ 113, the computer Y ₁ 111 sends a connection request to the computer Z ₃ 123, and the computer Z ₁ 121 sends a connection request to the computer X ₃ 103 via the D channel.
For simplicity, these connection requests will be referred to as a first request, a second request, and a third request, respectively. In addition, the priority is obtained based on, for example, the generation time of each connection request so that the order of each request can be controlled. Here, it is assumed that each computer has a unique number.
₁ The number of 101 is (1), the number of Y ₁ 111 is (2), Z
_It is assumed that the number of ₁ 121 is (3), and the lower the number, the higher the priority.

First, the connection control unit of each computer receiving the connection request notifies the connection control unit of each computer in the group of the connection request using the D channel (or B) The notification is placed on the ring communication path of the channel). The connection control unit of each computer that has received the notification replies whether there is a connection request that is currently being issued. Each computer X that received the merge request
₃ 103, Y ₃ 113, the connection control unit of the Z ₃ 123, based on the reply, respectively performs the following determination.

First, the connection control unit of the computer X ₃ 103 sends the first request (computer X ₁₁ 1) having a higher priority than the third request (request from the computer Z ₁ 121).
01, and immediately notifies the computer Z ₁ 121 that the third request is to be suspended without waiting for the result of the first request. Computer Z ₁ 121
Notifies the computer Z ₃ 123 of this result.
In addition, the connection control unit of the computer Z ₃ 123 outputs a third request (a request from the computer Z ₁ 121) having a lower priority than the second request (a request from the computer Y ₁ 111).
And waits for the result of the third request (in this case, pending), then notifies the computer Y ₁ 111 that the second request will be accepted. Computer Y ₁ 111
The result is also notified to the computer Y ₃ 113. Then, the connection control unit of the computer Y ₃ 113 knows that there is a second request (a request from the computer Y ₁ 111) having a lower priority than the first request (a request of the computer X ₁ 101), and after waiting for the result of the second request (received), the computer X ₁ 10 to accept the first request
Notify 1. Computer X ₁ 101 also notifies computer X ₃ 103 of the result.

The computer X ₁ 10 that against this way accepted highest priority first request was implicated
Each connection control unit of 1, X ₂ 102, Y ₃ 113, and Y ₄ 114 performs a respective connection change operation. That is,
X ₁ (B ₂ ) and X ₂ (B ₁ ), and Y ₃ (B ₂ ) and Y
₄ Release the connection of (B ₁ ), respectively, and let X ₁ (B ₂ ) and Y
₄ (B ₁ ) and a connection between Y ₃ (B ₂ ) and X ₂ (B ₁ ), respectively. Next, in response to the received second request, the related computers Y ₁ 111, Y ₂ 112, Z ₃
Each connection control unit of 123 and Z ₄ 124 performs a respective connection change operation. That is, the connection between Y ₁ (B ₂ ) and Y ₂ (B ₁ ) and the connection between Z ₃ (B ₂ ) and Z ₄ (B ₁ ) are released, and the connection between Y ₁ (B ₂ ) and Z ₄ (B ₁ ) is released. ) And Z
₃ Establish a connection between (B ₂ ) and Y ₂ (B ₁ ). After receiving the notification that the first request has been completed, the connection control unit of the computer X ₃ 103 re-notifies the held third request to the group. At this point, the computer Z ₁ 121 which has issued the third request has already received the computer X ₃ 10
Computer Z ₁₁ because he is in the same group as
The connection control unit 21 knows that the third request has been achieved as a result, and withdraws the request. In this way,
The three groups (X) 51, (Y) 52, and (Z) 53 are merged into one group (T) 54, and all three merge requests are satisfied.

As described above with reference to FIGS. 1A to 5, according to the group communication connection control method of this embodiment,
When two groups are merged, the connection between two adjacent computers that are members of one group and two adjacent computers that are members of the other group are changed. You can do this by simply doing This method is effective particularly when the number of terminals is large, since the number of times the logical connection is changed does not depend on the number of terminals (computer devices) forming the group. Also, by controlling the order of connection change operations by assigning priorities to each merge request, it is checked that the two groups to be merged are not the same prior to each connection change operation. By doing so, a plurality of groups can be merged without contradiction.

[0041]

According to the present invention, in a group communication system, a connection change operation for merging a plurality of groups into one can be easily and reliably performed, and the performance of the group communication system can be improved. It is possible.

[0042]

[Brief description of the drawings]

FIG. 1A is a part of a block diagram showing one embodiment of a connection configuration according to the present embodiment of a group communication system using a computer device embodying the present invention;

FIG. 1B is a part of a block diagram showing one embodiment of a connection configuration according to the present embodiment of a group communication system using a computer device embodying the present invention;

FIG. 2 is a sequence diagram showing a first embodiment of a connection processing operation according to the present invention of the group communication system in FIGS. 1A and 1B.

FIG. 3 is a flowchart showing a first embodiment of a connection processing operation according to the present invention of the computer device in FIG. 1A.

FIG. 4 is a flowchart showing a second embodiment of the connection processing operation of the computer device in FIG. 1A according to the present invention;

FIG. 5 is an explanatory diagram showing a specific example of a second embodiment of a connection control process of the computer device in FIG. 1A according to the present invention;

FIG. 6 is an explanatory diagram showing a group formation operation method of a conventional group communication system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Group communication application part 2 Connection control part 3-4 B channel 5 D channel 6 Output control part 7 Input control part 8 Output device 9 Input device 11 Group (X) 12 Group (Y) 13 Group (T) 14 Connection request 21 Connection request 22 Connection acceptance 23-25 Information exchange 26-27 Connection release 28-29 Connection establishment 51 Group (X) 52 Group (Y) 53 Group (Z) 54 Group (T) 60-61 Connection request 101-105 Computer X₁~ X_Five  111-115 Computer Y₁~ Y_Five  121-125 Computer Z₁~ Z₅

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-165732 (JP, A) JP-A-1-241959 (JP, A) JP-A-1-132243 (JP, A) JP-A-62-162 239642 (JP, A) JP-A-59-111498 (JP, A) JP-A-59-111497 (JP, A) JP-A-58-120359 (JP, A) JP-A-57-125547 (JP, A) Special Table 60-501534 (JP, A) Proc. Of the 1988 IEICE Autumn Meeting, Communication [Part B-2], B-212, Masafumi Shibasaki, et al. "Connection Control in Self-Developing Distributed Systems" Law ”IEICE Technical Report Vol. 88, No. 298, IN88-93, Masafumi Shibanuma, "Distributed Multipoint Connection Method", pages. 13-18 (58) Field surveyed (Int.Cl. ⁶ , DB name) H04L 12/46 H04L 12/28 H04M 3/56 JICST file (JOIS)

Claims (5)

(57) [Claims] At least two computers capable of simultaneously communicating with a plurality of other computers are connected by a circular logical connection during communication to form a group, and multi-point communication is performed between the computers in the group. In the connection control method of merging the plurality of groups into one group of the group communication system, the first computer which is one of the components of the first group is connected to the one of the components of the second group. The second
Based on the request for merging the first group and the second group sent to the first computer, the first computer, if the first group includes three or more computers, If the group releases the connection with the third computer adjacent to the first computer, and if the first group consists of two computers, the two computers between the third computer to open one of the connection, the upper Symbol second computer, the when the second group consists of three or more computers, the second adjacent to the second computer in the group of second If the second group is made up of two computers, one of the two connections to the fourth computer is opened. Releasing, the first computer establishes a connection with the fourth computer, the second computer establishes a connection with the third computer, and establishes a connection with the first group. when reconstructing all of the computer that constitutes the second group in a group, merge requesting the first computer, merge request destination
Whether the second computer is in the same group
Judge, and based on the judgment result that they are not in the same group,
Sending a merge request to the second computer and including the first group and the second group
Of merge requests from each computer in the group
An arbitrary priority is assigned to each, and based on the priority,
The processing order of multiple merge requests that occurred in the same group
Group connection control method of a group communication system, wherein Rukoto decided mechanism. 2. The group connection control method for a group communication system according to claim 1 , wherein the first computer and the second group are determined while the first computer determines the group of the second computer. When a new group merge request for at least one is issued from any group of computers including the first group and the second group, the new group merge request destination computer is included in the same group. The priority given to the other merge request is compared with the priority given to the new group merge request, and based on the priority,
Notifying the computer of the new group merge request source of acceptance or suspension of the connection change operation based on the new group merge request, and assigning the processing order of the plurality of connection change operations in the same group to the priority A group connection control method for a group communication system, wherein the group connection control method is determined on the basis of: 3. The group connection control method for a group communication system according to claim 2 , wherein the new group merge request destination computer is configured such that the new group merge request is more than another merge request in the same group. If the priority is low, the new group merge requesting computer is immediately notified of the suspension of the connection change operation based on the new group merge request, and the new group merge request is in the same group. If the priority of the new group merge request is higher than that of the other group merge request, the computer of the new group merge request source sends the new group merge request computer after determining the processing order of the connection change operation based on the other merge requests in the same group. A group connection control method for a group communication system, wherein the group connection control method notifies the reception of the connection change operation based on a group merge request. 4. A group connection control method for a group communication system as claimed in any one of claims 3, priorities of the merge request characterized in that granted under the order of generation of the respective merge request A group connection control method for a group communication system. 5. The group connection control method for a group communication system as claimed in any one of claims 3, priorities of the merge request to a predetermined priority to each of the merging requesting computer A group connection control method for a group communication system, wherein