KR20000039765A - Information transmission system using radio paging network - Google Patents

Abstract

The present invention discloses an information transmission system having a novel configuration using a wireless call network.

In the conventional wireless calling network, a simple call is a main function, and it is difficult to transmit additional information. In the present invention, the transmitting station Ss and the mobile station Sm are provided with a file processor 10 and a file reproducing unit 20. The file information is transmitted and received in a compressed form in the free time band of the call so that the mobile station Sm can reproduce or store the information.

As a result, it is possible to directly transmit the message, play the voice, play music, and transmit various information files through the wireless call network.

Description

Information transmission system using wireless call network

The present invention relates to a wireless caller (beeper system), and more particularly to an information transmission system using the same.

Along with mobile phones, the wireless paging network, which constitutes two major mountain ranges of mobile communication, has already exceeded 10 million subscribers. However, the information provided by the wireless call network is mainly limited to the information that can be transmitted through the call and the text information of very short size.

Fig. 1 shows a general configuration of the current wireless call network.

First, referring to the transmitting station Ss, it is composed mainly of the relay unit RL which relays the call number of the DTMB signal lamp transmitted through the telephone network including the public telephone network to the transmitting unit SN. The transmitter SN wirelessly transmits this call signal to the mobile station Sm via a relay station (not shown).

On the other hand, the additional information of the current wireless call network is mainly composed of text information, which is input by the input person (IN) directly to the system and transmits the voice message to be transmitted to the mobile station (Sm). After the call is sent to the caller, the input person (IN) summarizes this message and sends the text after inputting it.

On the other hand, the configuration of the mobile station Sm includes: a receiving unit RC for receiving the transmitted information, a storage unit MEM for temporarily storing it, a display unit DISP for displaying information contents, and an alarm unit WN for alerting the arrival of the information. And a control unit (CTR) which controls these operations as a whole.

The display unit DISP is mainly composed of a flat panel display device such as an LCD or a FED of a segment type. In recent years, the size of the display unit has been expanded to 2 or 3 rows to increase the amount of information transfer. (Sm) While increasing the manufacturing cost of the terminal significantly, there is still a problem of insufficient information display.

In addition, in the existing system, all text information other than the call number is passed through the input person (IN), so only a short message in a summarized form can be delivered, and a message of a sufficient length in a natural everyday language form is impossible.

The larger problem in this type of message transmission is the confidentiality of the information. Since the message is transmitted via the input person (IN), it is impossible to transmit the secret message between the carriers at all.

As a result, in the conventional wireless calling network, the service that can be provided is mainly the transmission of the call number, and the expansion of subscribers and the sale of terminals have reached the limit.

In view of such a conventional problem, an object of the present invention is to provide a wireless call network system capable of transmitting various types of information including voice information.

1 is a block diagram showing an existing system,

2 is a block diagram showing the configuration of a transmitting station Ss according to the present invention;

3 is a block diagram showing the configuration of a mobile station Sm according to the present invention.

<Description of the code used in the main part of the drawing>

Ss: Sending station

10: file processing unit

11: encoding section

12: packet separator

Sm: Mobile station

20: file playback unit

21: packet combiner

22: decoding section

30: audio output unit

40: amplification unit

50: headphones

60: port

The information transmission system according to the present invention for achieving the above object is

The transmitting station is provided with a file processing unit for encoding the file information in a compressed form,

The transmitter of the transmitting station transmits the compressed file information through the free band between calling or text information transmission, and the receiving unit of the mobile station receives it.

And a file reproducing unit for recovering the compressed file information received by the mobile station.

According to a preferred feature of the present invention, this file information includes a voice file, and the processing and reproduction thereof are MPEG encoded and decoded, so that the type of transmitted voice file information is an MP, in particular an MP3 file, and the mobile station is provided with a voice output unit. .

According to another preferred feature of the present invention, for convenience of transmission over an empty band, a packet having a predetermined size of encoded file information is divided into packets and transmitted in a packet unit, and after reception, the packets are combined and decoded.

As described above, according to the present invention, it is possible to transmit not only conventional input molecular information but also file unit information through a wireless call network, so that a large file such as a document file can be transmitted. In particular, when the transmission file is a voice file, the sender's voice itself can be played by the mobile station as it is, and new information transmission such as transmission of music information such as MP3 files can be performed, thereby greatly improving the convenience and usability of the wireless calling network. There is.

Example

Such specific features and advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

Figure 2 shows the configuration of the transmitting station (Ss) for the implementation of the system of the present invention, the center of the system also has a function of the relay unit (RL) for transmitting a call signal through the telephone network to the transmitting unit (SN) do.

As an additional service for this, the text information requested by the user or provided by the system as a service may be transmitted by the person in charge as in the related art.

A feature of the present invention is implemented in the file processing unit 10 for processing file information, the file processing unit 10 includes an encoding unit 11 for compressing and encoding file information. In this case, the compressed file information is transmitted through the transmitter SN. Since the transmitter SN mainly performs transmission of the call signal, the compressed file information is preferably transmitted through the free time band of the call signal transmission. something to do. In this case, if the length of the file information is excessively long, a traffic is required to transmit the call signal, so that the packet is divided into a packet having a predetermined unit length. (12) is further provided.

Accordingly, the transmission signal from the transmitter SN is composed of an identification signal for identifying the mobile station Sm, a classification signal indicating the number and order of packets, and one or a plurality of signal packets.

Here, the file information may be composed of a data file such as a document, a picture, or a voice file. The most suitable for the application of the present invention is a voice file, and a document file may be transmitted if necessary. On the other hand, a picture file of a large size can also be transferred, but if it is impossible to display it directly from the mobile station Sm due to the limitation of the display unit DIS, the mobile station Sm is used only as a data transmission device. It is somewhat low. Therefore, the following mainly describes the transmission of the voice file, and since the document file can be inferred from this description, redundant description is omitted.

Voice files that can be transmitted through a wireless call network include a message that the user wants to deliver and a music file that is a voice file itself. The most widely used voice file format in current communication is wav file which is the basic voice format of WINDOWS and MP3 format file which is compressed according to MPEG 3 standard.

First, a message that a user wants to deliver to another user is transmitted to a transmitting station Ss through a telephone network, recorded in wav format, and then encoded by the encoding unit 11 of the file processor 10 in MP3 format. Meanwhile, the MP3 music file, which is already compressed, is bypassed by the encoding unit 11 or recompressed at a low sampling rate as necessary. Thus, both the message and the music file have the same MP3 format. The packet is separated into a plurality of packets by the packet separator 12 and then sent to the transmitter SN.

Here, the process of encoding, ie, compressing or recompressing a wav file into an MP3 file is basically a conversion of a sampling rate. In general, an MP3 music file distributed in communication is sampled in 32 kHz stereo. This high sampling rate is for reproducing the excellent sound quality during playback. Since high quality sound quality is unnecessary for message delivery and mono is sufficient, for example, when a message is sampled at 8 ㎑ mono It is possible to form a file having a size of 1/8 of a 32-kHz stereo case.

On the other hand, since the general MP3 music file itself is an excessively high quality file compared to the mobile station Sm's voice reproduction capability, the sampling rate can be lowered as necessary. That is, the configuration of the audio reproduction and output unit that can be provided in the mobile station Sm carried by the user is relatively simple, as will be described later. Thus, even with the 8 GHz mono, music reproduction sufficient for the capability of the mobile station Sm is possible. It is possible.

However, if you want to use mobile station (Sm) as a data transmission device, you can also sample the message at low speed without reducing the sampling rate for music files in order to share data with other MP3 player such as computer or MP3 player. Do.

In this encoding, the sampling rate depends on the size of the file to be transmitted through the transmitting station Ss and thus the traffic occupancy of the wireless call network, and the capacity of the storage unit MEM to be provided by the mobile station Sm. This will be described later.

On the other hand, to compress message or document information (preferably TXT format), the ADPCM method can be used separately from the MP3 format, but this requires not only a separate encoder but also a very low compression rate, and the MP3 itself is a multi-media. Since the standard is established for the compression of files, it would be desirable to apply MP3 uniformly to the encoding of all file information.

There may be two sources of file information such as music files other than messages. One is a file transmitted by one user to another user, and the other is a file provided by the transmitting station Ss.

The former file is transmitted by a user through a data communication network, and the transmitting station Ss is transmitted to another user through a wireless calling network. The latter file is text information and music provided by the sending station Ss. It is a method of transmitting from a file database, and both methods become a new service that cannot be realized in the conventional radio calling network service.

On the other hand, a preferred configuration of the mobile station Sm to be used for the transmitting station Ss of FIG. 2 is shown in FIG.

In FIG. 3, the signal received by the receiving unit RC is displayed on the display unit DISP and stored in the storage unit MEM under the control of the control unit CTR as in the prior art, and the alarm of the signal arrival is the conventional alarm unit WN. Instead of the voice output unit 30.

In FIG. 2 and FIG. 3, the alarm unit WN and the voice output unit 30 are represented by the same speaker-shaped symbol, and the alarm unit WN may be configured as a simple sound speaker, so that the piezoelectric output of the electronic sound is achieved. Although it is possible to configure such as a speaker, the voice output unit 30 should be configured as a voice output speaker because the actual sound must be reproducible. A general audio output speaker is composed of a resistance speaker, etc., but the voice output unit 30 is preferably composed of a thin film speaker for miniaturization of the mobile station Sm.

According to the present invention, the control unit CTR identifies the received signal and displays the general call signal or text signal directly on the display unit DISP and simultaneously stores the received signal in the storage unit MEM.

When the received signal is file information (actually, packets of compressed file information), the file information is sent to the file reproducing unit 20, the separated packets are recombined by the packet combiner 21, and then the decoder 22 Decompress).

The decompressed file information becomes an executable wav or TXT format file. In the case of document information such as TXT, this information is displayed on the display unit DISP. In this case, since the document file has a longer length than simple character information, the display unit DISP is preferably configured to display a plurality of lines, and more preferably to display a scroll.

Since the voice file decompressed by the file reproducing unit 20 is weak in strength, it is preferably amplified through the amplifying unit 40 and then output to the voice output unit 30.

However, the provision of the amplification unit 40 in the mobile station Sm carried by an individual is difficult to set the output due to the limitation of the audible range, etc., which increases the size and cost of the device, and also consumes a lot of battery, thus the continuous use time. Will shorten.

Therefore, it is preferable to listen to the voice of the mobile station (Sm) device to the user's ear or connect a separate earphone or headphone 50 without a separate amplification unit 40.

According to such a configuration, since the mobile station Sm itself is provided with a compressed file reproducing function such as MP3, it is preferable that the user inputs an MP3 file or other file directly in addition to the transmission, and stores it in the storage unit MEM. For this purpose, a port 60 for directly inputting data into the memory MEM may be provided.

The biggest factor that determines the practicality of the system of the present invention is the size of the file information. As described above, this size influences the traffic load between the transmitting station Ss and the mobile station Sm. In Sm), the capacity of the storage unit MEM is determined.

Here, a 32㎑ stereo MP3 file can store about 1 minute per 1MB of capacity. Therefore, when the memory unit MEM is configured to 8 MB, it is possible to store about 8 minutes of MP3 music files. When compressing the message at 8 ㎑ mono sampling rate, the 8 MB memory unit MEM is stored per song. Two minutes of MP3 music files and 16 minutes of messages can be stored, which will be sufficient for normal use. When a message or a music file is cred and the capacity of the MEM is saturated, information that is not protected by lock is sequentially erased by a general first-in, first-out refresh. The information is stored.

As described above, according to the present invention, it is possible to transmit data such as a voice file or a document file by using a wireless call network, which can only perform simple text transmission through text input except for a simple call function. In addition, a voice playback function is provided to the mobile station so that it can be used as a simple MP3 player.

Accordingly, the present invention has the effect of greatly improving the usability and convenience of the wireless call network.

Claims (7)

A radio call network comprising a transmitting station Ss for relaying a call signal through a telephone network and transmitting it as a radio signal, and a mobile station Sm for receiving, displaying, alarming, and storing the call signal, The transmitting station Ss is provided with a file processing unit 10 which encodes file information in a compressed form and transmits the file information to the transmitting unit SN. And a file reproducing unit (20) for reproducing the compressed file information in the mobile station (Sm). The method of claim 1, After the compressed file information is separated into a plurality of packets at the transmitting station Ss and transmitted, An information transmission system using a wireless call network, characterized in that the mobile station (Sm) is recombined and reproduced. The method of claim 1, The file information includes a voice file, and the mobile station (Sm) is provided with a voice output unit (30) for reproducing and outputting the voice file. The method according to claim 1 or 3, And the compression of the file information is performed in MP3 format. The method of claim 3, And the voice file is composed of a message transmitted from one user to another user. The method of claim 1, And the file information is file information transmitted from one user to another user or provided by the transmitting station Ss. The method of claim 1, And a port for inputting the compressed file information to the mobile station Sm.