JPH07105827B2 - Terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] A communication network including a channel for transmitting and receiving communication information between a plurality of terminal devices according to the present invention and a control channel for controlling communication, for example, an ISDN public network. The present invention relates to a terminal device connected to a network, and more particularly, to a terminal device that can configure a sub-network by using simple information between users on a control channel.

[Conventional technology]

ISDN (Integrated Services Digital Network) as a new telecommunications network system for the advanced information society
There is. ISDN provides a comprehensive communication service by integrating various types of communication such as telephone, facsimile, data communication network, and image communication that have been performed separately or through interconnection between networks. It is a network. And IS to provide additional services
A subnetwork may be formed in the DN public network.

FIG. 5 shows a conventional subnetwork formed in an ISDN public network by using a private exchange.

A private exchange 15 such as a private branch exchange (PBX) is connected to the ISDN public network 11 via lines 12, 13 and 14.
Subscriber terminals 17 to 22 are connected to the private exchange 15.
These subscriber terminals 17 to 22 and the private exchange form a subnetwork.

In some cases, a host station is installed on the ISDN public network, and terminals are arranged in a star pattern around this host station to form a subnetwork.

FIG. 6 shows a subnetwork formed by using such a host station.

In this sub-network, the host station 31
Is installed, and the host station 31 and subscriber terminals 32-42 are connected by subscriber lines 32a-42a, respectively.

[Problems to be Solved by the Invention]

To form a sub-network by the private exchange described above, it is necessary to prepare new software for controlling the grounding of the exchange and the sub-network. Furthermore, ISDN
Since it is necessary to connect with and through a limited line, there is a drawback that the communication amount and available services are limited.

Also, when forming a network in which terminals are arranged in a star pattern centered on the host station, all communication is performed in opposition to the host, so if a certain amount of connection is made, access from other terminals will be possible. I can not do it. Furthermore, operations such as hierarchically grouping and handling the terminals cannot be performed.

Therefore, an object of the present invention is to provide a terminal device capable of forming a sub-network in a communication network without providing a special exchange or the like.

[Means for Solving the Problems]

The terminal device of the present invention includes (i) call processing information of a control channel provided separately from a channel for transmitting / receiving communication information and additional control information for controlling communication between a plurality of terminal devices forming a communication network. And (ii) a virtual hierarchical relationship with a specific other terminal device and what kind of information each terminal device has. Storage means, (iii) information addition means for adding the information stored in this storage means to the call processing information as simple information between users of the control channel, and (iv) information addition means or information There is provided call processing requesting means for requesting call processing to the communication network based on the call processing information of the control channel analyzed by the analyzing means and the simple information between users added thereto.

That is, the terminal device of the present invention stores virtual layers between terminals and additional information such as call processing information and simple information, and transmits and receives these information as user-to-user simple information on the control channel, The sub-networks have a hierarchical structure between them.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 conceptually shows the configuration of a terminal device in one embodiment of the present invention connected to an ISDN public network as a communication network.

ISDN terminal 41 is ISDN standard user / network interface 42
, And is connected to the ISDN public network 11 by a subscriber line 43. When the ISDN public network 11 receives an incoming call from the ISDN public network 11 via the subscriber line 43, the information analysis unit 44 controls the control channel, that is, the D channel user defined by the International Telegraph and Telephone Consultative Committee (CCITT). The contents of brief information are analyzed.

The ISDN terminal device 41 includes a storage unit 45 that stores a virtual hierarchical relationship in the sub-network and what information each ISDN terminal device in each layer has. The information stored in the storage unit 45 is added to the call processing information as the D channel user-to-user simple information by the information adding unit 46 when a call is made, if necessary. Further, the ISDN terminal device 41 is provided with a call processing requesting unit 49, and is adapted to request a call processing to the ISDN public network 11 based on the information added by the information analyzing unit 44 or the information adding unit 46. There is.

These information analysis unit 44, information addition unit 46, call processing request unit 49
Is controlled by a central control unit (CPU) 50 which is usually equipped in the ISDN terminal device 41.

Next, an ISDN subnetwork formed by using the ISDN terminal device 41 of the present embodiment having the above configuration will be described.

FIG. 2 shows a state in which the ISDN terminal device 41 of this embodiment is connected to the ISDN public network 11 to form a virtual sub-network.

The virtual sub-network 51 consists of multiple ISDN terminal devices 53.
Formed by ~ 68. These ISDN terminal devices 53-68
Are connected to the ISDN public network 11 by subscriber lines 53a to 68a, respectively. In addition, ISDN public network 11 is subnetwork 51
ISDN terminal equipment 69, 70, 71 and subscriber line 69 that do not form
They are connected by a, 70a, 71a.

The ISDN terminal devices 53 to 58 forming the sub-network 51 are
Virtual lines 53b, 53c, 53d, 53e, 54 showing virtual dependencies
b, 54c, 54d, 58b, 58c, 58d, 62b, 62c, 62d, 66b, 66
tied together at c.

FIG. 3 shows a virtual hierarchical structure within the sub-network 51 shown in FIG. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be appropriately omitted.

The ISDN terminal device 53 functions as a parent terminal in the subnetwork 51, and the ISDN terminal devices 54, 58, 62, 66 are connected as virtual child terminals by virtual lines 54b, 58b, 62b, 66b.

The ISDN terminal device 54 which is a virtual child terminal further includes ISDN terminal devices 55, 56 and 57 which are virtual grandchild terminals and virtual lines 54b and 5
They are connected by 4c and 54d to form a lower subnetwork 72. Similarly, the ISDN terminal device 58 that is a virtual child terminal, ISDN terminal device 59, 60 that is a virtual grandchild terminal,
61 and virtual lines 58b, 58c, and 58d are connected to form a lower subnetwork 73. The ISDN terminal device 62 includes ISDN terminal devices 63, 64, 65 which are virtual grandchild terminals and a virtual line 62.
b, 62c and 62d are connected to form a lower sub-network 74, and the ISDN terminal device 66 is connected to ISDN terminal devices 67 and 68 by virtual lines 66b and 66c to form a lower sub-network 75. .

Such a hierarchical relationship between the ISDN terminal devices 53 to 68 is stored in each storage unit 45.

Subnetwork 51 that is virtually layered as described above
As one business entity, with sub-networks 72 and 7 further down
It is possible to apply 3, 74, and 75 to the head office and branch offices of enterprises that are distributed in the space on the ISDN public network 11. Also, if the virtual hierarchy has two stages, star engagement is also possible.

Then such ISDN public network 11 and sub-network
The call connection between the 51 will be described.

FIG. 4 shows the call processing and the data flow in the sub-network 51 virtually hierarchized as shown in FIG.

From the ISDN terminal device of the ISDN public network 11 that does not form the subnetwork 51, for example, the ISDN terminal device 69 to the subnetwork 51
When accessing to, the representative number of the sub-network 51 is given to the ISDN terminal device 53. When the ISDN terminal device 53 that virtually functions as a parent terminal receives an incoming call, the information analysis unit 44 analyzes the calling number of the D channel and the like, and
The storage unit 45 analyzes how the received call should be processed. For example, if the received call is to be transferred to the ISDN terminal device 54 which is a child terminal, the call is transferred to the ISDN terminal device 54. When predetermined information to be added is stored in the storage unit 45 of the ISDN terminal device 53 at the time of transfer, the information addition unit adds predetermined additional information 81 to the call and transfers the call. IS
The ISDN terminal device 54 that received the call transfer from the DN terminal device 53
The information analysis unit 44 analyzes the contents of the additional information 81 and the storage unit 45,
If necessary, the additional information 82 is further added and the call is transferred to the ISDN terminal device 55, which is a virtual grandchild terminal.

Call transfer from the ISDN terminal device 53 to the ISDN terminal device 54 is performed by the subscriber lines 53a, 5 connected to the ISDN public network 11 shown in FIG.
Done through 4a. Similarly, from ISDN terminal equipment 54 to ISDN
The call is transferred to the terminal device 55 via the subscriber lines 54a and 55a. This transfer is virtually carried out via the virtual lines 53b and 54b which are hierarchically connected as shown in FIG. The additional information 81 and 82 are added to the call processing information of the D channel of the ISDN public network 11.

Next, communication between the sub-networks 51 will be described. For example, when the ISDN terminal device 56, which is a grandchild terminal, wants to use a specific database existing in the sub-network 51, the information adding unit 46 adds the request information 83 to the call processing information of the D channel to be a child terminal. The ISDN terminal device 54 is called. The ISDN terminal device 54 receiving the call analyzes the request information 83 and the contents of the storage unit 44. ISDN terminal equipment
54 is a virtual circuit 53b, 54b or 54 to the upper layer ISDN terminal device 53 or the lower layer ISDN terminal devices 55 and 57 as required.
Transfer the call via d. For example, the upper layer ISDN terminal equipment 5
If the call is transferred to 3, after doing the same analysis,
The request information 84 is added and the call is transferred to the ISDN terminal device 58, 62 or 66 which is another call terminal.

After the call processing is completed, data transmission / reception or a call is executed according to the request information 83. Transmission and reception of this data may be performed by D channel by packet switching,
It may also be performed by circuit switching or packet switching of the B channel.

The upper parent terminal ISDN terminal device 53 or the child terminal ISDN terminal devices 54, 58, 62, 66 are provided with their respective processing software. Services such as displaying the department or individual name on the ISDN terminal device are possible. In addition, ISDN which is the parent terminal
The terminal device 53 or ISDN terminal devices 54, 58 which are child terminals,
It is also possible to search the information by placing databases in 62 and 66. Further, it is possible to have a database in each layer and obtain detailed data from the ISDN terminal device in the lower layer. When receiving a service in the sub-network 51, it is not always necessary to make a call to the upper layer, and if an ISDN terminal device that can receive the service is known in advance, the call is made directly to that ISDN terminal device. It is possible to call.

〔The invention's effect〕

As described above, according to the present invention, the virtual hierarchical relationship is defined between the terminal devices connected to the communication network, and the sub network can be configured by using the simple additional information of the control channel. Not only is it unnecessary to install a switchboard, but also a sub-network can be configured without being restricted by communication volume or service. Further, it is possible to flexibly configure a sub-network by hierarchically grouping the terminal devices or by expanding the terminal devices in a plane to perform star coupling.

[Brief description of drawings]

1 to 4 are for explaining one embodiment of the present invention, in which FIG. 1 is a block diagram showing the configuration of a terminal device, and FIG. 2 is a terminal device for an ISDN public network. A state diagram showing a state in which virtual sub-networks are connected to each other, a configuration diagram showing a virtual hierarchical structure in the sub-network shown in FIG. 3, a call processing and data in the sub-network shown in FIG. FIG. 5 is a state diagram showing a flow, FIG. 5 is a state diagram of a conventional subnetwork formed in an ISDN public network using a private exchange, and FIG. 6 is a state of a conventional subnetwork formed using a host station. It is a figure. 41 …… Terminal device, 44 …… Information analysis unit, 45 …… Storage unit, 46 …… Information addition unit, 47 …… Call processing request unit, 53 to 68 …… ISDN terminal device.

Claims (1)

[Claims] 1. Call processing information of a control channel provided separately from a channel for transmitting and receiving communication information for controlling communication between a plurality of terminal devices constituting a communication network, and between users added to the call processing information. Information analysis means for analyzing the contents of simple information, storage means for storing a virtual hierarchical relationship with a specific other terminal device and what information each terminal device in each hierarchy has, and this storage means Information adding means for adding the information stored in the call processing information to the call processing information as user-to-user simplified information of the control channel, and the call processing of the control channel added by the information adding means or analyzed by the information analyzing means. A terminal device comprising: call processing requesting means for requesting call processing to the communication network based on information and simple information between users added to the information.