JPH04156028A - Radio type data transmission equipment - Google Patents

Abstract

PURPOSE:To obtain superior transmission efficiency and reliability by radio- transmitting the output data of information processing equipment converted to compression data by a data compressing means to data reception equipment in a short time. CONSTITUTION:This equipment is constituted of a radio type data transmission equipment provided with the data compressing means 2 which converts the output data of the information processing equipment PC to the compression data and outputs it to a radio type transmission means 11, and a radio type data reception equipment provided with a data expansion means 7 which converts the compression data from a radio type reception means 12 to data before compression and outputs it to a wire type transmission means 6. Thereby, it is possible to enhance the transmission efficiency by transmitting the data even when it is radio transmission data having a large capacity, and to shorten transmission time, therefore, the occurrence probability of a transmission error can be reduced, as well.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wireless data transmission device that wirelessly transmits output data from an information processing device to another information processing device, such as a wireless data transmission device that wirelessly transmits output data from a personal computer. The present invention relates to a wireless data transmission device for transmitting data to a printer.

[Conventional technology]

Conventionally, this type of wireless data transmission device includes a wired receiving means for receiving output data from an information processing device via a transmission line, and a wireless transmitting means for wirelessly transmitting the output data of the wired receiving means. a wireless data transmitting device, a wireless receiving means for receiving wirelessly transmitted data, and a wired transmitting means for transmitting output data of the wireless receiving means to an information processing device via a transmission line. The wireless data transmitting apparatus transmits the output data of the information processing device to the wireless data receiving apparatus without being processed.

[Problem to be solved by the invention]

However, the above-mentioned conventional technology has the drawback that the larger the capacity of the output data of the information processing device, the longer the time taken to transmit the output data by the wireless data transmitter, and the higher the probability of occurrence of a transmission error. there were.

The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks,
The object of the present invention is to provide a wireless data transmission device with excellent transmission efficiency and reliability.

[Means to solve the problem]

In order to achieve this object, the wireless data transmission device according to the present invention has a wireless data transmission device equipped with data compression means for converting the output data of the information processing device into compressed data and outputting the compressed data to the wireless transmission means. and a wireless data receiving device provided with data decompression means for converting compressed data from the wireless receiving means into uncompressed data and outputting the converted data to the wired transmitting means. There is something about it.

Preferably, the data compression means converts the output data into compressed data consisting of the output data of the information processing device and consecutive number of times instruction data indicating the number of consecutive times of the output data.

Preferably, the data decompression means converts compressed data consisting of output data of the information processing device and consecutive number instruction data indicating the number of consecutive times of the output data into uncompressed data.

Preferably, the data compression means converts specific data out of the output data of the information processing device into compressed data.

[For production]

The wireless data transmitting device wirelessly transmits the output data of the information processing device, which has been converted into compressed data by the data compression means, to the wireless data receiving device in a short time. The output data converted into previous data is transmitted to another information processing device.

〔Effect of the invention〕

Therefore, according to the wireless data transmission device of the present invention, even a large amount of wireless transmission data can be transmitted in a short time, and transmission efficiency can be improved. Furthermore, since the transmission time can be shortened, the probability of occurrence of transmission errors can also be reduced.

Furthermore, the data compressed by the data compression means is limited to specific data that is frequently continuous among the output data of the information processing equipment, thereby making it possible to improve the data compression efficiency.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Figures 1 and 3, a wireless data transmission device is connected to the data input/output terminal of a personal computer (PC) via a transmission line (L1), while an impact dot printer (P1), a laser type Various printers (such as page printers (R2) and electrostatic plotters (R3))
Similarly, the transmission line (L2
) to connect each separate wireless data transmission device.

Output data from a personal computer (PC) is wirelessly transmitted to an appropriate printer (PRT) via the wireless data transmission device depending on its content (for example, character data, image data, or drawing data). .

The wireless data transmission device includes a wireless data transmission device and a wireless data reception device.

The wireless data transmission device is a personal computer (P
C) or wired receiving means (1) for receiving output data from the printer (PRT), and data compression means (2) for converting part of the output data of the wired receiving means (1) into compressed data; Storage means (3) for storing a set capacity of output data from the data compression means (2);
The radio transmission control means (4) converts the data read from the radio transmission control means (4) into radio transmission data, and the modulation means (5) superimposes the output data of the radio transmission control means (4) on a carrier wave and transmits the superimposed data.

The wireless transmission control means (4) and the modulation means (5) constitute a wireless transmission means (11).

The wireless data receiving device includes a wireless receiving means (12) that receives data wirelessly transmitted from a printer (PRT) or a personal computer (PC), and compressed data among the output data of the wireless receiving means (12). data decompression means (7) for converting data into uncompressed data; and storage means (8) for storing output data from the data decompression means (7).
and a wired transmission means (
6).

The wireless reception means (12) is composed of a demodulation means (10) for separating data from a received signal, and a wireless reception control means (9) for converting output data from the demodulation means (10) into wired transmission data. It is.

The data compression means (2) converts the output data of the information processing equipment such as the personal computer (PC) or printer (PRT) into compressed data consisting of the output data and consecutive number instruction data indicating the number of consecutive times of the output data. Convert to

To be more specific, as shown in FIG. 2, compressed data is often transmitted continuously among output data from the personal computer (PC) or printer (PRT).
FFH" and "008" are configured by concatenating consecutive number of times instruction data after the data, and the most significant bit of the consecutive number of times instruction data is the identification bit of "FFH" and "OOH", and the remaining 7 bits are is the data that indicates the number of consecutive times.

For example, when the data "FFH" is 3 consecutive bytes, it is "FFH"83H", when the data "'OOH" is 5 consecutive bytes, it is "FFH"05H", etc.
Both "FH" and "OOH" correspond to a maximum of 128 consecutive data.

When the compression is repeated 128 times or more, the same compression is repeatedly expressed within 128 times.

For example, when "OOH" is repeated 130 times,
It is expressed as “FFH”7FH”FFH”02H”.

The data decompression means (7) converts the compressed data described above into data before compression.

[Another example]

Another embodiment of the present invention will be described below.

Connection between a wireless data transmission device and a personal computer, or a wireless data transmission device and a printer may be configured using existing methods for both hardware and software, such as R3-232C, Centronics, GPIB.
Other schemes can be used.

Information processing equipment includes personal computers and
'It is not limited to links, but can be applied to any input/output device or measuring device such as a CRT or keyboard.

The modulation method used by the modulation means is arbitrary, such as a PSK modulation method or an FSK modulation method.

The data communication procedure between the wireless data transmission devices, that is, the wireless transmission control means (4) and the wireless reception control means (9).
) may be a general-purpose method, such as (JIS C6362) or (JIS C636).
3) can be used.

In the previous embodiment, the information processing device and the wireless data transmission device are connected, but the wireless data transmission device is connected to the information processing device on the data sending side, and the information processing device on the data receiving side is connected. A wireless data receiving device may be connected to the terminal.

Although the capacity of the storage means (3) and (8) is not limited, since data compressed by the data compression means is stored, the capacity can be set small.

In the previous embodiment, the information processing device and the wireless data transmission device are separate bodies, but the wireless data transmission device may be incorporated into the information processing device and integrated.

Note that although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of a wireless data transmission device according to the present invention, in which FIG. 1 is a block diagram, FIG. 2 is a diagram of the configuration of compressed data, and FIG. 3 is a schematic perspective view. (1)...Wired receiving means, (2)...
・Data compression means, (6)...Wired transmission means, (7)...Data expansion means, (11)...
...Wireless transmitting means, (I2)...Wireless receiving means, (L1), (L2)...Transmission line.

Claims (1)

[Claims] 1. A wired receiving means (1) that receives output data from an information processing device via a transmission line (L1), and a wireless device that wirelessly transmits the output data of the wired receiving means (1). A wireless data transmitting device comprising a formula transmitting means (11), the data compressing means (2) converting output data of the information processing device into compressed data and outputting the compressed data to the wireless transmitting means (11). A wireless data transmission device is provided. 2. Wireless receiving means for receiving wirelessly transmitted data (
12) and a wired transmission means (6) for transmitting the output data of the wireless reception means (12) to an information processing device via a transmission line (L2), the wireless data receiving device comprising: A wireless data receiving device comprising a data decompression means (7) for converting compressed data from a wireless receiving means (12) into uncompressed data and outputting the converted data to the wired transmitting means (6). 3. A wireless data transmission device comprising the wireless data transmission device according to claim 1 and the wireless data reception device according to claim 2. 4. The data compression means (2) converts the output data into compressed data consisting of the output data of the information processing device and consecutive number instruction data indicating the number of consecutive times of the output data. 3. The wireless data transmitting device according to 3. 5. The data decompression means (7) converts compressed data consisting of the output data of the information processing device and consecutive number instruction data indicating the number of consecutive times of the output data into uncompressed data. Or the wireless data receiving device according to 3. 6. The wireless data transmitting device according to claim 4, wherein the data compression means (2) converts specific data out of the output data of the information processing device into compressed data.