JPH0548761A - Isdn communication channel control method - Google Patents

Abstract

PURPOSE:To make a communication using a free communication channel possible by separating a communication channel control part from a communication service function and making communication programs and communication channels correspond to each other. CONSTITUTION:When there is an incoming call from a network to an NCU, the control part 6 starts a communication program 8 by a communication program selection actuation control part in a communication control part 7. When an answer signal is sent out, task identifiers and the communication channels are made to correspond to each other and recorded in a channel control table 5, and then reported as channel identification numbers to the program 8. At the time of calling control similar to reception is performed when an answer from an opposite terminal is received and at the time of data transfer, only the channel identification number is used to send and receive data. Consequently, the communication service function which does not depend upon the details of the ISDN basic interface is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IS for accommodating a plurality of ISDN basic interfaces for data communication.
The present invention relates to a DN communication channel control method.

[0002]

2. Description of the Related Art As a communication terminal connected to a basic interface of ISDN, a general-purpose information processing device such as a personal computer or a workstation and these are combined into one IS.
A network control device connected to the DN basic interface (hereinafter,
NCU) is already realized.

In these communication terminals, one NC
Since it is premised that only U is incorporated in a general-purpose information processing device, a function (communication channel control function) for directly controlling the NCU to perform connection and data transfer by a basic interface, and processing, storage, and man-machine of data to be transferred Functions such as interface control (communication service functions) are integrated as one communication program.

[0004]

Therefore, even when a general-purpose information processing apparatus accommodates a plurality of ISDN basic interfaces and can process a plurality of communication programs in parallel, a certain communication program can operate on one basic interface. When using the above communication channel, there is a problem that even if there is an empty communication channel on the basic interface, it cannot be used from another communication program.

The present invention solves the above problem, and when a communication channel is available on any of a plurality of basic interfaces, the corresponding available communication channel is used by any of the plurality of communication programs. The purpose is to enable communication.

[0006]

In order to solve the above problems, a plurality of communication programs for executing communication service functions such as data processing, storage, man-machine interface control, etc. are used, and each of the communication programs and the programs are used. A communication channel control unit that associates the communication channels on the basic interface with each other, a channel management table that records the relationship between each communication program and each communication channel associated by the communication channel control unit, and a communication program that is executed when an incoming call is received. A communication program selection start control unit for selecting and starting is provided, and when an incoming call is received, the communication program selection start control unit starts the communication program and associates the communication program started at the time of sending a response signal with the communication channel. After recording and recording in the channel management table, attach to the communication channel. The communication program is notified of the number as a channel identification number, and at the time of transmission, the communication program and the communication channel are associated at the time of receiving the response signal from the partner terminal, and the channel identification number is recorded in the channel management table. Is notified to the communication program, and at the time of data transfer, data transmission / reception is performed using only the channel identification number.

[0007]

By separating the communication channel control unit from the communication service function, it is possible to collectively manage a plurality of basic interfaces and communication channels on the interfaces in the communication channel control unit. By associating the communication channel used by each communication program with the response signal as a trigger, each communication program can transfer data only by the logical channel identification number.

Therefore, it becomes unnecessary for the communication program to directly control the basic interface, and each communication program can use all the communication channels on the plurality of basic interfaces accommodated equally.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram of an embodiment of a communication terminal apparatus including an ISDN communication channel control method according to the present invention.

In the figure, reference numeral 1 is a network control unit (NCU1) for controlling connection with one ISDN basic interface.
Therefore, "123-4560" is used as an example of the address. Similarly, 2 and 3 are NCU2 and NCU3 for controlling connection with one basic interface,
"123-4561" and "123-4562", respectively
Is used as the address. A pair (channel identification number) of an address assigned to each NCU 1, 2, 3 and a value that does not overlap with other communication channels for the communication channel determined between the terminal and the network when the response signal is detected. Is used to select one basic interface among NCUs 1, 2, and 3 and further select one communication channel among a plurality of communication channels on the interface.

Reference numeral 4 is a multitasking operating system for processing a plurality of programs in parallel. System 4
However, by using the function call of the multi-task operating system 4, a management number (hereinafter, referred to as a task identifier) that is assigned to each program without duplication in order to manage the execution of each program is used.
It is acquired in the communication program managed and executed by.

Reference numeral 5 is a channel management table for storing the correspondence between channel identification numbers and task identifiers. 6 records the task identifier notified from the communication program and the channel identification number of the communication channel determined at the time when the response signal is detected in the channel management table 5, notifies the communication program of the channel identification number, and notifies the communication program of the channel identification number. When data is transmitted, the data is transferred to the communication channel of the NCU corresponding to the channel identification number notified together with the transmission data from the communication program, and when the data is received from the communication channel, the task identifier is set using the channel identification number of the communication channel. It is a communication channel control unit that controls the transfer of the received data to the communication program corresponding to the task identifier by searching the channel management table 5.

Reference numeral 7 denotes a communication program management unit which receives an incoming call notification from the communication channel control unit 6 when an incoming call is received in the NCU 1, 2, 3 and controls the selection and activation of the communication program. Reference numerals 8 and 9 are communication programs to which data is transferred by being assigned task identifiers from the multitask operating system 4.

FIG. 2 is an explanatory diagram showing the structure of the channel management table. Reference numeral 10 is an area for storing a task identifier. Reference numeral 11 is an area for storing a channel identification number, and a symbol string in which addresses and communication channels to be used are arranged with the symbol # as a delimiter is used as the channel identification number. Specifically, in the first row of the channel management table 5, the task identifier 0001
And the channel identification number B1 # 1234560 correspond,
It is shown that the communication program having the task identifier 0001 uses the communication channel B1 on the basic interface having the address 123-4560. The same applies to the second row.

FIGS. 3 to 7 show an embodiment in which the control flow executed by the communication channel control unit 6 is shown by an SDL diagram. As shown in FIG. 4, when an NCU receives a call from the network, the NCU sends a call setting notification (1) to the communication channel control unit 6, and the communication channel control unit 6 selects a communication program in the communication program management unit 7. An incoming call notification (2) is given to the activation control unit 16.

Here, when the communication program selection / startup control unit 16 cannot respond to the incoming call (3), the communication channel control unit 6 receives a notification of unresponsiveness from the communication program selection / startup control unit 16, Release the NCU call (4).

When the communication program selection / startup control unit 16 can make a response (5), the communication channel control unit 6 sends a notification that the response is possible and a task identifier corresponding to the communication program to be started up, to the communication program selection / startup control unit 16 The task identifier is stored in the task identifier storage area 10 of the channel management table 5 (6), and the channel identification number of the selected communication channel is associated with the task identifier in the channel identification number storage area 11 of the channel management table 5. Store (7) and select this channel identification number for the communication program.
The activation control unit 16 is notified (8) and the NCU is notified of a response (9).

As shown in FIG. 3, when the call request is notified from the communication program selection / startup control unit 16 (10), the communication channel control unit 6 detects the presence / absence of a free communication channel (11), and the free channel is detected. If not, the communication program selection / startup control unit 16 is notified of this (12) and the process returns to the initial state. When there is a free communication channel, the task identifier received from the communication program management unit 7 is stored in the task identifier storage area 10 of the channel management table 5 (13), and the NCU is notified of the call setting (14).

Detect the response number from the NCU (15)
And the channel identification number of the communication channel determined at that time is stored in the channel identification number storage area 11 of the channel management table 5.
(16), and notifies the communication program selection / startup control unit 16 of the channel identification number (17).

When there is a communication channel release notification from the NCU (18), this is notified to the communication program selection / startup control unit 16 (19), and the task identifier storage area 10
The task identifier is deleted from (20).

As shown in FIG. 5, when there is a disconnection / release request from the communication program selection / startup control unit 16 (21), the communication channel control unit 6 indicates in the channel management table 5 of the task identifier of the communication program to be disconnected. Examine the existence (22)
If it cannot be detected, the communication program selecting / starting control unit 16 is notified that the communication program cannot be disconnected / released (23). If the task identifier can be detected, the communication channel corresponding to the task identifier is searched from the channel management table 5, the NCU is notified that the communication channel is released / disconnected (24), and the channel is released (25). At this time, the task identifier and the channel identification number corresponding to it are deleted from the channel management table (26).

Upon receiving a notification of disconnection / release from the NCU (27), the channel management table is searched for a task identifier corresponding to the channel identification number of the notified communication channel (28), and the task identifier is searched. Communication program selection / startup control unit 1 if communication channel identification number is stored
6 is notified of disconnection / release (29), and then the NCU is notified that release is complete (30). At this time, the task identifier and the channel identification number corresponding to it are deleted from the channel management table (31).

As shown in FIG. 6, when there is a data transmission request from the communication program selection / startup control unit 16 (32),
The communication channel control unit 6 checks whether the task identifier of the communication program to be transmitted exists in the channel management table 5 (3
3) If not detected, the communication program selection / startup control unit 16 is notified that data cannot be transmitted.
(34). If it can be detected, the data is transferred to the channel having the channel identification number corresponding to the task identifier (3
5).

When there is a notification from the NCU that data has been received (36), the NCU's channel identification number is checked in the channel management table (37), and if it exists, communication of the task identifier corresponding to the channel identification number is made. Transfer the data to the program (38). If not found in the channel management table, the NCU discards the received data (39).

FIG. 7 is a diagram for explaining the meaning or operation of the symbols shown in FIGS. The meaning or action is shown below the symbol.
By referring to FIG. 7, it can be understood that step (1) shown in FIG. 4 is “notification from NCU”, for example.

FIG. 8 shows an embodiment of a communication device for selectively executing a communication program when an incoming call arrives. Reference numerals 12 and 13 denote communication program files managed by the multitasking operating system 4, respectively. 14 is file 1
The external storage device stores 2 and 13.

The communication program management unit 7 gives a unique numerical value (service identification number) to each communication program on the communication device in advance, and gives the communication program name managed by the multitasking operating system 4 and the communication program. The communication service management table 15 that records the correspondence with the service identification number that has been set, and the call identification message that includes the service identification number when receiving a call, and that corresponds to the notified service identification number that is recorded in the communication service management table 15 Communication program selection / start control unit 1 that starts the corresponding communication program by calling the function of the multitasking operating system 4 using the name of the communication program
It is composed of 6.

The communication program selection / startup control unit 16 is
By searching the file name “proc1” of the communication program 8 from the external storage device 14 by the service identification number notified using the call setting information at the time of incoming, requesting the multitasking operating system 4 to start the communication program 8, When the task identifier is notified from the communication program 8, the communication channel controller 6 is notified of the response together with the task identifier, and the communication program controller 8 is notified of the channel identification number notified from the communication channel controller 6.

After the communication program 8 is started by the multitasking operating system 4, the communication program 8 notifies the communication program selection / startup control unit 16 of the task identifier.
The channel identification number and the data notified from are transferred to the communication channel control unit 6.

FIG. 9 shows an example of the service management table. 17
Is an area for storing a service identification number, and 18 is 17
This area stores the file name of the communication program corresponding to. Specifically, in the first row of the service management table of FIG. 9, the service identification number 1 corresponds to the communication program name “proc1”. The same applies to the second row.

[0031]

According to the present invention, each communication program that accommodates a plurality of basic interfaces and is processed in parallel is
Since the data transfer is performed using only the channel identification number without directly controlling each basic interface and the communication channel, it is possible to realize the communication service function that does not depend on the details of the ISDN basic interface. In addition, by combining this control method with the selection and activation control of the communication program at the time of incoming call using the service management table, the communication program that processes the communication service function notified at the time of incoming call can be automatically used by using multiple basic interfaces at the same time. A center-type communication service to be executed can be easily realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a channel management table.

FIG. 3 is a control flow (A).

FIG. 4 is a control flow (B).

FIG. 5 is a control flow (C).

FIG. 6 is a control flow (D).

FIG. 7 is an explanatory diagram of elements in a control flow.

FIG. 8 is a configuration diagram of an embodiment of a communication device that selectively activates a communication program when an incoming call arrives.

FIG. 9 is an explanatory diagram of a service management table.

[Explanation of symbols]

 1 Network Control Device 4 Multitask Operating System 5 Channel Management Table 6 Communication Channel Control Unit 7 Communication Program Management Unit 8 Communication Program 10 Task Identifier Storage Area 11 Channel Identification Number Storage Area 12 Communication Program File 14 External Storage Device 15 Communication Service Management Table 16 Communication program selection / startup control section 17 Service identification number storage area 18 Communication program name storage area

Claims (1)

[Claims] 1. In an ISDN communication terminal capable of parallel processing of a plurality of communication programs and accommodating a plurality of ISDN basic interfaces, a communication program for executing individual communication service functions, each of the programs and the program A communication channel control unit that associates the communication channels on the basic interface to be used, a channel management table that records the relationship between each communication program and each communication channel that is associated by the communication channel control unit, and communication that is executed when an incoming call arrives. A communication program selection start control section for selecting a program and starting the program, and when a call is received, the communication program selection start control section starts the communication program, and the communication program and the communication channel started when the response signal is transmitted. Are recorded and recorded in the channel management table. Then, the number assigned to the communication channel is notified to the communication program as the channel identification number, and at the time of transmission, the communication program and the communication channel are associated at the time when the response signal from the partner terminal is received, and the channel management table is displayed. The ISDN communication channel control method, in which the channel identification number is notified to the communication program after the data is recorded, and the data can be transmitted and received using only the channel identification number at the time of data transfer.