JP2570156B2 - Wireless selective calling system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective calling system of a display system, and more particularly to a radio selective calling system for transmitting arbitrary character information to a radio selective calling receiver.

[0002]

2. Description of the Related Art In a conventional radio selective calling system, when an arbitrary sentence or a fixed sentence is sent to a radio selective calling receiver (hereinafter referred to as a receiver), a numeral corresponding to a character is entered from a numeric keypad of a push-button dial type telephone. Was sent in combination.

For example, when sending the character "A",
The numeral "11" shown in FIG. 4 was sent by pressing the numeric keypad. When sending "i", it is "12". When the answer is "a", the push button "1112" is pressed. The signal sent in this manner was sent to the transmission base station for the selective radio call via the telephone exchange, converted into a code corresponding to "1112", and sent to the receiver. In the receiver, “1” is set according to a fixed memory for conversion corresponding to this code.
The character corresponding to 112 "was displayed.

[0004]

In this conventional character transmission method, it takes a lot of time to input data using the numeric keypad of the telephone, and the telephone and the telephone line must be occupied for a long time. In addition, if they are determined uniformly as shown in FIG. 4, radio waves flying in space are captured, and character information is known from a sequence of numbers, which is a secret leak. Further, the inputting person has to store the conversion table as shown in FIG. 4 and has to carry at least the exchange table. Also,
There were also restrictions on the types of input characters.

SUMMARY OF THE INVENTION An object of the present invention is to provide a radio selective calling system which solves the above-mentioned problems. The secret of information is not leaked, the occupation time of a telephone line is short, and a conversion table is prepared. It is another object of the present invention to provide a radio selective calling system capable of inputting many characters without requiring storage.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a radio selective calling receiver, a transmitter for transmitting information to the radio selective calling receiver, a telephone set and an exchange for receiving and exchanging signals from the transmitter. In a radio selective calling system constituted by a public telephone network and a transmission base station for transmitting a selective calling signal, the transmitter is adapted to externally input correspondence information of arbitrary characters and codes and arbitrary information. An input unit, a first light receiving unit that receives external correspondence information of any character and code as an optical signal, a demodulation unit that demodulates a signal received by the first light receiving unit, A first memory for storing the corresponding information or the corresponding information demodulated by the demodulation unit; and converting any information input from the input unit into a tone signal by the corresponding information stored in the first memory. A control unit for converting and outputting, a tone generating unit for generating a tone based on a signal from the control unit, and a light emitting unit for transmitting correspondence information stored in the first memory to the outside as an optical signal, The radio selective calling receiver includes a second light receiving unit that receives the optical signal of the corresponding information sent from the light emitting unit, a demodulation unit that demodulates the signal received by the second light receiving unit, A second memory for storing correspondence information; a control unit for converting a signal transmitted from the transmitting base station via an antenna into character information by using the correspondence information stored in the second memory; A display unit for displaying character information.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the radio selective calling system according to the present invention. In this embodiment, a transmitter unit for transmitting information to a selective call receiver, a telephone set 21 for receiving a tone signal from the transmitter unit, and an exchange 2 for exchange
2, a call base station 23 comprising a selective call transmitting base station for performing selective call, and a selective call receiver (hereinafter, referred to as a receiver unit).

The transmitter section has an input section 6 for externally inputting correspondence information between arbitrary characters and codes and arbitrary information.
0, a light receiving unit 51 that receives the correspondence information of an arbitrary character and code from outside as an optical signal, a demodulation unit 52 that demodulates the signal received by the light receiving unit 51, and the correspondence information input from the input unit 60 or A memory 61 for storing the correspondence information demodulated by the demodulation unit 52, a control unit 53 for converting arbitrary information input from the input unit 60 into a tone signal based on the correspondence information stored in the memory 61, and outputting the tone signal; A tone generating unit 56 that generates a tone based on a signal from 53 is provided, and a light emitting unit 57 that sends the corresponding information stored in the memory 61 as an optical signal to the outside.

The receiver section includes a light receiving section 10 for receiving the optical signal of the corresponding information sent from the light emitting section 57, a demodulation section 11 for demodulating the signal received by the light receiving section 10, and a demodulated corresponding section. A memory 8 for storing information, a control unit 5 for converting a signal transmitted from the transmission base station 23 via an antenna into character information based on correspondence information stored in the memory 8,
A display unit 4 for displaying the converted character information.

Next, the operation of this embodiment will be described.

[0012] The transmitter section is mainly about the size of an electronic organizer. The input unit 60 is constituted by a keypad capable of inputting characters and numbers in the same manner as an electronic organizer, and can input general characters. First, in use, necessary information on correspondence between characters and codes is stored in the memory 61 via the control unit 53. For example, when registering the character "A", "A" is input from the storage pad, and then a three-digit number is input as a code number. When "135" is input as a three-digit number, "A" is associated with "135" in the memory 61. Thereafter, when "A" is input, "135" is called from the memory 61 and the control unit 5
3 is input. The code number input to the control unit 53 is converted into a tone signal, and a tone corresponding to the code is generated from the tone generation unit 56 via the drive unit 55.

On the other hand, in the memory 8 of the receiver unit, the same correspondence between characters and codes as those previously stored in the memory 61 of the transmitter unit is stored. This storage is performed by pressing the switch 59 so that the control unit 53 reads the information in the memory 61, converts the information into a light emission signal, and
The light emitting section 57 emits light via 8 and sends out an optical signal. This optical signal is received by the light receiving unit 10 of the receiver unit, demodulated by the demodulation unit 11 via the switching unit 9, and stored in the memory 8 via the control unit 5 with the same characters as those in the memory 61 of the transmitter unit. The correspondence of the code is stored.

As described above, when information is transmitted from the transmitter unit to the receiver unit in a state where the memories of the transmitter unit and the receiver unit are set, the telephone 21 calls the transmission base station 23, and then transmits the tone. The tone of the generator 56 is transmitted to the transmission base station 23 via the telephone transmitter and the exchange 22. Transmission base station 2
3 converts the signal into a selective calling signal and transmits it as a radio wave.
The transmitted radio wave is demodulated via the antenna radio section of the receiver section, becomes a digital signal, and is transmitted to the control section 5 via the decoder 1. The transmitted signal is stored in the memory 8
Are converted into character information according to the code-character correspondence stored in, and are displayed on the display unit 4 as characters.

The switching unit 9 of the receiver unit is used to switch the light receiving unit 10 between a case where ambient light is detected and a case where the light receiving unit 10 is used to receive an optical signal. When used to detect surrounding light and shade, a light receiving unit signal is sent to the control unit 5 via the switching unit 9, and when the surroundings are dark, the illumination unit 3 is turned on via the illumination driving unit 2 and the display unit is turned on. Light 4
By illuminating the display unit 4, even if the surroundings are dark, the display unit 4
You can read the characters displayed in. As described above, the switching unit 9 is provided to cause the light receiving unit 10 to perform two functions.

The light receiving section 51 and the demodulation section 52 of the transmitter section are for receiving an optical signal from another transmitter section, and are used for inputting correspondence information between characters and codes from the other transmitter section. This is the input section used.

The display section 54 is a display section for displaying the status of input, the contents of the memory 61 or information obtained from outside.

The receiver unit and the transmitter unit have the shapes shown in FIG. 2, and information received by the receiver unit is displayed on the display unit 101. The transmitter section includes an input section 104 for inputting information, and a display section 103 for displaying input information, information in the memory 61, and information received from others as necessary.

The information input from the input unit 104 can be stored in the memory of the transmitter unit in advance. The stored information is read from the memory by pressing the switch 59, and a tone signal is transmitted.

In the above embodiment, the transmitter unit and the receiver unit have been described in separate housings.
Of course, it can be used as a transceiver. In this case, the light-emitting unit and the light-receiving unit that transfer information between the transmitter unit and the receiver unit are not necessarily required. However, a light receiving section 51 for receiving information from another transmitter section and a demodulating section 52
Uses the light receiving unit 10 and the demodulation unit 11 of the receiver unit.

Next, an example of a signal form of the transmitter section will be described with reference to FIG. (A) is an example of correspondence between characters and codes. When a code 135 corresponding to “A” is input from the input unit 60 of the transmitter unit, the memory 6 of the transmitter unit is input.
“1” is stored as “135” in 1. “I” becomes “24”
6 ". Such a correspondence is formed in the memory 61. After" Ai "is input after such a correspondence is formed, a code string of" 135246 "as shown in FIG. The code is stored in the control unit 53 and the memory 61.
It is handled by being changed to a binary code as shown in (c),
The code string “13524” shown in (b) becomes the code string shown in (d). This code string further includes “0” and “1”.
Are converted into tone frequencies “F1” and “F2” corresponding to the tone signal, and are generated from the tone generator 56 of the transmitter unit.

[0022]

As described above, according to the present invention, a code corresponding to a character can be freely selected, a character corresponding code communicated only between the transmitting side and the receiving side is determined, and By storing the information in the memory, information can be transmitted and received only to a specific receiver unit and transmitter unit. This makes it possible to keep the information secret. In particular, in the case of transmission using wireless communication, eavesdropping is easy, and thus such protection means is effective.

Furthermore, since the transmitter section has a light receiving section for receiving information from another and a component attached thereto, it can receive character-to-code information from the other transmitter section, and a certain group. It becomes possible to share information only during the period. Even if important information is erroneously sent to a receiver unit that does not correspond, correct information is not displayed on the receiver unit because the correspondence between codes and characters is different. Therefore, even if the information is erroneously sent to another receiver unit, the secret of the information is not leaked.

Further, the information input from the input unit is once input to the memory of the transmitter unit, and is transmitted to the telephone at one time. This can be done in a short time, and the telephone or telephone line is not occupied for a long time, so that the call cost can be kept low.

Further, there is no need to store an exchange table for exchanging codes and characters, and to carry an exchange table. Also,
The input unit can be provided with ten or more numeric keys, and it is possible to input more input characters than the numeric keys.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a radio selective calling system according to the present invention.

FIG. 2 is an external view of a transmitter unit and a receiver unit.

FIG. 3 is a diagram illustrating a signal conversion example of a transmitter unit.

FIG. 4 is a diagram showing an example of character conversion in a conventional input method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decoder 2 Lighting drive part 3 Lighting part 4, 54, 101, 103 Display part 5, 53 Control part 6 Light emission drive part 7, 57 Light emission part 8, 61 Memory 9 Switching part 10, 51 Light receiving part 11, 52 Demodulation part 21 Telephone 22 Switch 23 Transmission base station 55,58 Driver 56 Tone generator 59 Switch 60,104 Input unit

Claims (5)

(57) [Claims] 1. A radio selective call receiver, a transmitter for transmitting information to the radio selective call receiver, a public telephone network comprising a telephone set and a switch for receiving and exchanging signals from the transmitter, and a selective call receiver. In a radio selective calling system configured by a transmission base station that transmits a signal, the transmitter includes: an input unit for externally inputting correspondence information of arbitrary characters and codes and arbitrary information; A first light receiving unit for receiving the corresponding information of the character and the code as an optical signal; a demodulating unit for demodulating a signal received by the first light receiving unit; a corresponding information input from the input unit or the demodulating unit A first memory for storing the correspondence information demodulated in step 1, a control unit for converting arbitrary information input from the input unit into a tone signal based on the correspondence information stored in the first memory, and outputting the tone signal A tone generating unit that generates a tone based on a signal from the control unit; and a light emitting unit that sends the corresponding information stored in the first memory to the outside as an optical signal. A second light receiving unit for receiving an optical signal of the corresponding information sent from the light emitting unit, a demodulating unit for demodulating a signal received by the second light receiving unit, and a second storing the demodulated corresponding information A memory, a control unit for converting a signal transmitted from the transmitting base station via an antenna into character information based on correspondence information stored in the second memory, and a display unit for displaying the converted character information A radio selective calling system comprising: 2. The radio selective calling receiver according to claim 1, further comprising: an illumination unit for illuminating the display unit; and an illumination drive unit for driving the illumination unit. The wireless selective calling system according to claim 1, wherein the lighting unit is turned on via the lighting driving unit. 3. The transmitter according to claim 1, further comprising a display unit for displaying arbitrary information input from the input unit, correspondence information stored in the first memory, and correspondence information from outside. 2. The radio selective calling system according to claim 1, wherein: 4. The transmitter has a memory in which arbitrary information input from the input unit can be stored in advance, reads out the stored information at a time, converts it into a tone signal, and outputs it. The radio selective calling system according to claim 1, wherein: 5. An input section for externally inputting correspondence information between an arbitrary character and a code and arbitrary information, a light receiving section for receiving externally the correspondence information between an arbitrary character and a code as an optical signal, A demodulation unit that demodulates a signal received by a light receiving unit; a memory that stores correspondence information input from the input unit or correspondence information demodulated by the demodulation unit; and an arbitrary information input from the input unit. A control unit that converts and outputs a tone signal based on the correspondence information stored in the memory; a tone generation unit that generates a tone based on a signal from the control unit; and transmits the correspondence information stored in the memory to the outside as an optical signal A control unit for converting a signal transmitted from the transmitting base station via the antenna into character information by using the corresponding information stored in the memory; and a display unit for displaying the converted character information. Transceiver radio paging system, comprising a display unit for.