JPH05110564A - Data transmission system by portable ratio terminal - Google Patents

Abstract

PURPOSE:To provide the data transmission system by the portable radio terminal, in which a user side of a radio portable terminal can operate it in the same way as an ordinary wired system terminal without caring about a tele-terminal comnunication specially, and also, a host computer side can execute a processing in the same way as a communication system of an established wired system. CONSTITUTION:In the data transmission system by the portable radio terminal, in which a host computer 11 is connected to a gate way 13 under the control of a synchronous data link through a communication controller 12, the gate way 13 is connected to a tele-terminal system 15 through a packet switching network 14, and a radio base station 15b of the tele-terminal system 15 is connected to a radio terminal 16 by a radio communication having a tele-terminal exclusive procedure, the gate way 13 is provided with a cluster processing part having a host communication function, a cluster managing function and a logical unit managing function, and the radio terminal 16 contains a tele- terminal protocol, and executes a communication with the gate way 13 in accordance with a communication procedure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission system using a portable wireless terminal in which a host computer and a portable wireless terminal are connected using a teleterminal system.

[0002]

2. Description of the Related Art In recent years, mobile communication technology for realizing communication between a mobile unit and an office or between mobile units has been dramatically improved. For example, a mobile phone, a mobile phone, or Communication by pager or the like is known. Although these are capable of two-way communication using voice as a medium, they cannot transmit and receive data and cannot transmit messages such as sentences including Kanji data and image information.

Therefore, for example, when a salesman is visiting a customer, he / she accesses his / her host computer to check the inventory in real time, takes an order, and retrieves the customer information on the spot. Or, if the customer cannot answer the question on the spot, in order to be able to answer the question on the spot by information retrieval, each salesman possesses a portable wireless terminal and a host
It is necessary to construct a data communication system that can send and receive data to and from a computer.

On the other hand, various techniques have been established for wired data communication systems, and a host computer and wired terminals can be freely connected via a network to transmit and receive a large amount of data. Is possible.

However, when a conventional wired data transmission system is used to connect to a portable wireless terminal of a teleterminal system via various networks, a wired and wireless data communication protocol is used. Since it is completely different, it was necessary to solve various problems.

[0006]

That is, in the conventional wired data communication system, the session with the host computer is disconnected in a predetermined procedure when an abnormality occurs on the line. When the wireless data communication system is processed in the same manner as the wired system, since the communication medium is wireless and the terminal is a mobile body, a problem occurs, for example, in a place where radio waves cannot reach. Further, although the terminals of the wired system have been established to occupy the line, it is not appropriate for the terminals of the wireless system to occupy the teleterminal line because it is necessary for each person to carry around. Further, since wireless packets are relatively expensive, it is necessary to suppress the transmission of unnecessary data.

Therefore, according to the present invention, the user side of the wireless portable terminal can handle it in the same manner as a normal wire-based terminal without paying special attention to teleterminal communication, and the wired connection established on the host computer side. It is an object of the present invention to provide a data transmission system using a portable wireless terminal that can be similarly processed as a mobile communication system.

[0008]

In order to achieve the above object, in a data transmission system using a portable wireless terminal of the present invention, a host computer is a gateway under the control of a synchronous data link via a communication control device. Connected to the
Data transmission by a portable wireless terminal in which the gateway is connected to a teleterminal system via a packet switching network, and a wireless base station of the teleterminal system is connected to a mobile terminal by wireless communication having a teleterminal-dedicated procedure In the system, the gateway has a cluster processing unit having a host communication function, a cluster management function, and a logical unit management function, the wireless terminal includes a teleterminal protocol, and communicates with the gateway according to a communication procedure. Is.

[0009]

According to the present invention, the gateway has the cluster processing unit having the host communication function, the cluster management function and the logical unit management function, the wireless terminal includes the teleterminal protocol, and the gateway is connected according to the communication procedure. By performing communication, the user side of the wireless mobile terminal can handle it in the same way as a normal wired system terminal without paying special attention to teleterminal communication, and the host computer side can use the established wired system. It is processed as a communication system.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to an embodiment shown in the drawings. FIG. 1 is a diagram illustrating a basic configuration of a data transmission system using a portable wireless terminal according to an embodiment of the present invention.

Referring to FIG. 1, the data transmission system of this embodiment includes a host computer 11 and a communication controller 1.
2, a gateway 13, a packet switching network 14, a teleterminal system 15 including a shared use center (CC) 15a and a radio base station (TT) 15b, a radio base station 1
5b and a portable wireless terminal 16 such as a personal computer for wireless communication. The host computer 11 and the gateway 13 are connected by a dedicated line via the communication control device 12,
High-level data link control (HD) in a system that provides a standardized interface for terminal users
LC) based synchronous data link control. Gateway 13 and teleterminal system 1
The connection between the shared use center 15a of No. 5 and NTT
The packet exchange service (DDX-P) provided by (Nippon Telegraph and Telephone Corporation) is used. In addition, the wireless base station 15b of the teleterminal system 15 and the wireless terminal 1
The connection with 6 is performed by wireless communication using a procedure dedicated to the teleterminal.

This embodiment is an online package that emulates the functions of a conventional kanji information display system. For example, the information sent from the host computer 11 is displayed on the display screen of the wireless terminal 16. To enter information from the keyboard,
It has an emulation function capable of printing the information sent from the host computer 11 on the printer device, and a local copy function for printing the information displayed on the display screen by the emulation function on the printer device.

In the above configuration, the hardware of the gateway 13 has, for example, a main storage capacity of 8 Mbytes or more, 1
It is composed of a workstation having an auxiliary storage capacity of 47 Mbytes and 662 Mbytes, a display device of a color display, an input device such as a keyboard and a mouse. The communication control device 12 uses the V. It consists of 24 interfaces and a full duplex 2-line communication board and communication cable. The wireless terminal 16 is a personal computer equipped with a main storage capacity of 640 Kbytes, an auxiliary storage device such as a floppy disk, a display device of a liquid crystal display, an input device of a JIS keyboard, a printer, etc. A personal computer and a communication device provided in the personal computer include a wireless modem, a charger, an RS232C conversion cable, and the like.

The software of the gateway 13 is composed of a basic OS for workstations and application software of a cluster controller which will be described later. Also, the software on the terminal side is
It is composed of basic software of MS-DOS (a disk operating system of Microsoft Corporation) and application software of a teleterminal emulator.

FIG. 2 is an overall view for explaining the system logical configuration of the embodiment of the present invention.

In the figure, the host computer 11
And a module of the gateway 13 system connected between the teleterminal system 15 and the teleterminal system 15 are a device 21, a data link control process 22, a gateway process / operation management process 23, an X. 25 processing 2
It consists of 4. The device 21 is an actual communication input / output port. The data link control processing 22 is processing of the synchronous data link control processing unit based on HDLC which is the basis of the existing network system control.
Gateway processing is synchronous data link control processing ~
X. Provides gateway services such as data conversion between 25, emulation, distribution of data to terminals,
The operation management process manages the operation of this system. X. Two
5 Processing 24 is processing of the protocol control processing unit between the packet switching network and the data terminal.

The module of the wireless terminal 16 connected to the teleterminal system 15 is a device 25,
Device processing 26 and network system control 27
And an emulation process 28. The device processing 26 controls the interface between the wireless base station 15b and the device such as asynchronous communication processing. The network system control 27 provides the services of the existing network system and also includes the teleterminal protocol. The emulation process 28 is a process of a terminal emulator.

FIG. 3 is a diagram for explaining the functional configuration of the gateway according to the embodiment of the present invention.

In the figure, the functions of the gateway are the cluster processing unit 31 and the emulation processing unit 32.
A communication frame processing unit 33, a teleterminal system processing unit 34, and an operation management processing unit 35. The cluster processing unit 31 uses the protocol of the existing network system and the host communication function for communicating with the host computer 11 according to the synchronous data link control procedure, and the data transmitted from the host computer 11. Distribute and send to each logical unit,
Further, the cluster management function for transmitting the data transmitted from each logical unit to the host computer 11, and the session state between the terminal and the host computer 11 are managed, and the line state of the host computer 11 is controlled by each terminal. It is the part that has the logical unit management function of notifying to. The emulation processing section 32 is a section having a terminal emulation function for each logical unit. The communication frame processing unit 33 is a part that converts data into a communication frame, and is a part that performs transmission suppression processing of unnecessary data in this embodiment. The tele-terminal system processing unit 34 includes an X. In this embodiment, the resending process is basically performed so that the session with the host computer 11 is not disconnected due to one abnormality on the teleterminal line. Further, the wired line between the host computer 11 and the gateway occupies the logical line during the session opening, but does not occupy the teleterminal line, and appropriately releases the line. .. The operation management processing unit 35 is a part that performs an operation management function such as a service operation status display of the physical unit, a service control function, a failure trace function, or an account function such as a communication start / end time trace and a pay wireless frame trace.

FIG. 4 is a diagram for explaining the functional configuration of the wireless terminal according to the embodiment of the present invention.

In the figure, the functions of the wireless terminal are the device control processing unit 41, the teleterminal system processing unit 42, the network system control processing unit 43, the emulation processing unit 44, and the setup processing unit 45.
Composed of and. The device control processing unit 41 includes a keyboard control function, screen control function, printer control function, R
This is a part having an S-232C control function and the like. The tele-terminal system processing unit 42 is a unit having a tele-terminal communication function. The network system control processing unit 43 is a unit that processes the established simple network system. The emulation processing section 44 is a section having a screen emulation function, a printer emulation function, a file transfer function, and an intelligent workstation function established in the existing system. The setup processing unit 45 is a unit having functions such as line control information setup, display control information setup, printer control information setup, keyboard definition, and kanji table definition.

That is, the present system becomes a portable terminal using the teleterminal system 15 by organizing the wireless terminals 16 in the host computer 11, reducing the transmission amount in the wireless section, and the number of terminals is individual. It is configured so that the number of terminals can be defined independently of the number of host logical lines so as to conform to the basic principle of mobile communication of carrying around.

In the data transmission system using the portable radio terminal having the above-mentioned configuration, the cluster processing unit 31 of the gateway 13 performs processing according to the communication control procedure of the existing network system, and the emulation processing unit 32.
Host computer 11 by executing the processing in
From the side, it seems that a series of terminal processes is being executed on the gateway 13. Further, between the gateway 13 and the wireless terminal 16, a communication protocol considering the characteristics of teleterminal communication is adopted, and since the terminal to the user interface function as the existing established terminal, the user is a normal wired terminal. You can treat it as if you were operating. Therefore, by configuring as in the embodiment of the present invention, it becomes possible to easily incorporate an existing portable wireless terminal as a system without paying special attention to teleterminal communication.

Further, on the teleterminal line, the session with the host computer 11 is not disconnected due to one abnormality, and the retransmission processing is performed, whereby a system suitable for a wireless data transmission system is constructed. The wired line between the host computer 11 and the gateway 13 occupies the logical line during session opening, but the number of teleterminal lines is independent of the number of host lines by appropriately releasing the line on the teleterminal line. However, the wireless terminal can be personally owned. Furthermore, in teleterminal communication, the same data as the previous time on the screen is not transmitted to the terminal, compression processing is performed according to the communication data amount, and unnecessary data transmission suppression processing is performed, making wireless packets relatively expensive. Therefore, data communication can be performed at low cost. Therefore, a function equivalent to a wired terminal operation is realized on the teleterminal.

Further, in terms of operation, on the gateway 13, various service operation status display and control functions,
It is possible to implement a teleterminal failure trace function, communication start / end time trace function, and wireless frame amount count.

[0026]

As described in detail above, according to the present invention, the user side of the wireless portable terminal operates in the same manner as operating a normal wired terminal without special awareness of teleterminal communication. The host computer side can process as an established wired communication system, and the gateway side appropriately releases the line on the teleterminal line to make the connection in a short time so that the number of host lines can be increased. Therefore, the number of teleterminal lines is independent, and there is an effect that it can communicate with an extremely large number of terminals.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a basic configuration of a data transmission system using a portable wireless terminal according to an embodiment of the present invention.

FIG. 2 is an overall diagram illustrating a system logical configuration according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a functional configuration of a gateway according to the embodiment of this invention.

FIG. 4 is a diagram illustrating a functional configuration of a wireless terminal according to an embodiment of the present invention.

[Explanation of symbols]

 11 host computer 12 communication control unit (CCU) 13 gateway 14 packet switching network 15 teleterminal system 15a shared use center (CC) 15b wireless base station (TT) 16 wireless terminal 21 device 22 data link processing 23 gateway processing / operation Management processing 24 X. 25 processing 25 devices 26 device processing 27 network system control 28 emulation processing 31 cluster processing unit 32 emulation processing unit 33 communication frame processing unit 34 teleterminal system processing unit 35 operation management processing unit 41 device control processing unit 42 teleterminal system Processing unit 43 Network system processing unit 44 Emulation processing unit 45 Setup processing unit

Claims (1)

[Claims] 1. A host computer is connected to a gateway via a communication control unit under synchronous data link control, and the gateway is connected to a teleterminal system via a packet switching network. In a data transmission system by a portable wireless terminal in which a wireless base station of the system is connected to a wireless terminal by wireless communication having a procedure for exclusive use of a teleterminal, the gateway has a host communication function, a cluster management function, and a logical unit management function. A data transmission system by a portable wireless terminal, comprising a cluster processing unit, wherein the wireless terminal includes a teleterminal protocol and communicates with the gateway according to a communication procedure.