JPH03250929A - wireless data communication system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] A handy terminal is connected wirelessly online to a wireless controller and a host computer using an ID number, and data created by the host computer based on data manually entered on the handy terminal is transferred to the handy terminal. Regarding a wireless data communication system that can be transferred to a terminal, the purpose of the handy terminal is to enable communication with any wireless controller of the wireless data communication system, and the purpose of the handy terminal is to communicate with multiple handy terminals, multiple wireless controllers, controllers, and hosts. In a wireless data communication system consisting of computers, the ID numbers of multiple wireless controllers existing in the system are registered in advance in all handy terminals, and the ID numbers and data used by the handy terminals are wirelessly transmitted. If a response to stop communication is received from the wireless controller with the above ID number, the handy terminal
It is configured to be able to communicate with the wireless controller numbered D.

[Industrial application field]

The present invention relates to a wireless data communication system in which a handy terminal is wirelessly connected online to a wireless controller and a host computer using an ID number, and data created on the host computer based on data input on the handy terminal can be transferred to the handy terminal. It is something.

[Conventional technology]

A conventional wireless data communication system will be described with reference to FIGS. 4 to 6.

In FIG. 4, the handy terminals 23 and 24 have an ID number 1 and can communicate with a wireless controller ID=1 having the same ID number 1. Then, the handy terminals 23 and 24 and the wireless controller I
D=1, forming the subsystem 21. Similarly, the handy terminals 25 and 26 have an ID number n, and a wireless controller ID having the same ID number n.
= It is possible to communicate with n. The handy terminals 25 and 26 and the wireless controller ID=n constitute a subsystem 22. Further, the plurality of subsystems 21 and 22 are connected to a host computer 20, and the host computer 20 creates desired data based on data input from the handy terminals 23 to 26.
send it back to

FIG. 5 is an explanatory diagram of the handy terminal, in which the handy terminals 23 to 26 are shown as a handy terminal 30. And the handy terminal 30 is
It is composed of a liquid crystal display section 31, a membrane key 32, a protective sheet 33 for protecting the membrane key 32, and a scroll key 34.

FIG. 6 is a block diagram of a conventional handy terminal. In the figure, a CPU section 35 is a control section, and controls the entire handy terminal 30 according to a program in a ROM 36. Furthermore, data input from the membrane key 32 is temporarily stored in the RAM 37 via the I10 port 38, and simultaneously displayed on the liquid crystal display section 31 via the LCD controller driver.

The display contents displayed on the liquid crystal display section 31 are scrolled using the scroll key 34.

Furthermore, the initial program loading of the handy terminal 30 is performed using the optical interface 40. There is also an RF CPU section 43 for communicating between the handy terminal 30 and the wireless controller.
Under the control of the CPU 43, radio waves are emitted from the antenna 45 via the RF section 44 toward the wireless controller.

In addition, a voltage drop detection unit 46 for keeping the voltage of the handy terminal 30 constant, a DC-DC converter 47,
There is a battery 48, and a buzzer 4 that notifies the user carrying the handy terminal 30 of the presence or absence of communication, etc.
9 connects to the CPU section 35 and RF via the I10 boat 50.
It is connected to the CPU section 43.

Note that the above-mentioned handy terminal is used in a restaurant or the like to listen to various orders from customers and to notify the center of the orders.

[Problem to be solved by the invention]

However, in the above wireless data communication system, as shown in FIG. 4, in the same subsystem 21,
Communication can only be performed between the wireless controller having the same ID number and the handy terminal 23 or 24. Therefore, in frequently used subsystems, a handy terminal is made to wait for communication, and in less frequently used subsystems, idle time of the wireless controller increases. In other words, the system as a whole was operating inefficiently.

Furthermore, since there is a limit to the distance over which communications can be made, communication becomes impossible if a user carrying a handy terminal moves further than the wireless controller's limited distance.

In order to solve the above problems, the handy terminal in the wireless data communication system of the present invention is intended to enable communication with any wireless controller of the wireless data communication system.

[Means to solve the problem]

The principle of the present invention will be explained with reference to FIG. ID numbers of a plurality of wireless controllers (all wireless controllers, if necessary) existing in the system are registered in advance in the handy terminals 11, 12, . . . , 22. The wireless controller (ID=1.2...n) receives data and ID numbers from the handy terminals 11... and transfers them to the host combination coater 10. The host computer 10 creates necessary data based on the data input by the handy terminals 11... and sends it back to the handy terminals 11 via the wireless controller (ID=1.2,...). do.

[For production]

It is assumed that the handy terminal 11 has previously registered ID numbers, ID=1, ID=2, . . . in the system. A user carrying the handy terminal 11 inputs desired data and transmits the ID number 1 and data to the wireless controller (ID=1). If the wireless controller (ID=1) is communicating with another handy terminal 21, the handy terminal 11
receives a response from the wireless controller to stop communication. In this case, the handy terminal 11 starts communication with a wireless controller having another pre-registered ID number, for example, ID=2.

As described above, since a plurality of ID numbers are registered in the handy terminals 11, it is possible to communicate using the ID number of an available wireless controller.

〔Example〕

An embodiment of the present invention will be described with reference to FIG.

In FIG. 2, handy terminals 11 and 12,
The wireless controllers (ID=1), (ID=2), and host computer 10 are the same as those shown in FIG. 1, so their explanation will be omitted. Handy terminal 11 is
While communicating with the wireless controller (ID=1) (0), the handy terminal 12 communicates with the wireless controller (ID=1).
Suppose you send an open request text to (1)
. Since the wireless controller <1D=1) is already communicating with the handy terminal 11, no response is returned to the handy terminal 12. Therefore, the handy terminal 12 uses another wireless controller (ID=2
) (2). Since the wireless controller (ID=2) is not communicating, it sends an open completion text to the handy terminal 12 (3). The handy terminal 12 learns that it can communicate with the wireless controller (ID=2), and sends information to the wireless controller (ID=2) (
4). The wireless controller (ID=2) sends the information text received from the handy terminal 12 back to the handy terminal 12. Handy terminal 12
compares the transmitted information text with the received information text to confirm that the correct information has been transferred (5). As a result, the handy terminal 12 transmits an end text to the wireless controller (ID=2) (6). The wireless controller (ID=2) transmits the information text received from the handy terminal 12 to the host computer 10 (7). The host computer 10 that has received the above information text transmits the status to the wireless controller (ID=2) (8
). The wireless controller (ID=2) transmits the status received from the host computer 10 to the handy terminal 12 (9). The handy terminal 12 returns the status received from the wireless controller (ID=2) to the wireless controller (ID=2).

The wireless controller (ID=2) compares the transmitted status and the received status and confirms that the transfer was performed correctly (10). Wireless controller (ID=
2) sends a termination text to the handy terminal 12 (11).

Figure 3 (1) is a flowchart of the above-mentioned transmission and reception exchanges between the handy terminals 11 and 12.
) and (II).

Note that the text structure used in FIGS. 2 and 3 (1) and (II) is shown in FIG. 3 (III).

First, a key on the handy terminal 11 (12) is pressed to input data (step ■).

When you have finished entering all the data, press the transfer key (
Step ■).

Processing is executed for each key until the transfer key is pressed (step ■).

When the transfer key is pressed, the wireless controller (ID=1) is selected as the transmission system (step 2).

The handy terminal 11 (12) sends the line open request text rcONJ to the wireless controller (ID=1).
(Step ■).

When the handy terminal 11 (12) receives the line open completion text "RDY" (step ■), it transmits the information to the wireless controller (ID=1) (step ■).

The handy terminal 11 (12) receives the response from the host computer 10 through the wireless controller (ID=1) (step 2).

The handy terminal 11 (12) displays the above response on the liquid crystal display screen (step 2).

If the handy terminal 11 (12) cannot obtain the line open completion text "RDY" in step (2), it checks whether the transmitting system has ID=2 (step @).

If the sending system is ID=2, step ■
Return to , select sending system ID=1, and repeat the above operation.

If the transmitting system is not ID=2, the transmitting system is set to ID=2 (step ■). Then, the line open request text “CON” is sent to the wireless controller ID=2.
Return to step ■ to send.

〔Effect of the invention〕

According to the present invention, since a variable ID is provided so that the handy terminal can communicate with any wireless controller within the system, the efficiency of data communication within the system can be improved.

[Brief explanation of drawings]

FIG. 1 is a diagram of the principle configuration of the present invention, FIG. 2 is an explanatory diagram of an embodiment of the present invention, FIG. 3 (1) and (n) are flowcharts of the present invention, and FIG. 3 (II[) is a diagram of the present invention. Text configuration diagram, Figure 4 is an explanatory diagram of the conventional example, Figure 5
The figure is an explanatory diagram of a handy terminal, and FIG. 6 is a block diagram of a conventional handy terminal. lL12...Handy terminal ID=1, ID=2...Wireless controller 10...
host computer

Claims (1)

[Claims] In a wireless data communication system consisting of a plurality of handy terminals, a plurality of wireless controllers, and a host computer, the ID numbers of the plurality of wireless controllers existing in the system are registered in the handy terminal in advance. , when the Handy Terminal wirelessly transmits the ID number and data used by the Handy Terminal, if it receives a response to stop communication from the Wireless Controller with the ID number, the Handy Terminal will communicate with the Wireless Controller with a different ID number. A wireless data communication system characterized by the ability to communicate.