KR20020073880A - A data line repeater system for mobile data telecommunication - Google Patents

Abstract

PURPOSE: A dedicated line relay system for a wireless data communication is provided to perform a reliable data communication without generating the interference phenomenon of a radio wave in a shadow area or a suburban area. CONSTITUTION: A donor unit(5) transmits and receives an RF(Radio Frequency) signal with a wireless data base station(1). A remote unit(8) transmits and receives an RF signal with a wireless data terminal. A repeater is installed between the donor unit(5) and the remote unit(8) for transmitting data. The repeater has a master DSU(Data Service Unit)(6) for receiving the RF signal from the donor unit(5) and converting the received RF signal into an electric signal, a slave DSU(6) for receiving the electric signal, converting the received electric signal into an RF signal, and transmitting the RF signal to the remote unit(8), and a dedicated line(7) for transmitting the electric signal between the master DSU(6) and the slave DSU(6).

Description

Dedicated line relay system for wireless data communication {A data line repeater system for mobile data telecommunication}

The present invention relates to a dedicated line repeater system for wireless data communication. More specifically, unlike a conventional repeater using a spatial medium for transmitting and receiving with a base station, a conventional repeater transmits a base station, a receiving antenna and a service side. In order to prevent oscillation due to interference with the receiving antenna, DONOR UNIT receives the RF data from the base station, and a dedicated line repeater converts the RF data from the mother station into a transmission signal for transmission through a dedicated line. And a local station which receives a transmission signal from a dedicated line repeater, converts the signal into an RF signal, and communicates with a wireless terminal.

In recent years, with the rapid development of mobile communication technology capable of transmitting and receiving data regardless of time and place, wireless communication device users always want to be within the serviceable area of wireless communication service. In order to satisfy these needs of users, the base stations are widely installed in all regions to provide services, but this requires a lot of investment cost, and the number of base stations is not enough to satisfy 100% of users' needs. .

Such a conventional repeater is typically implemented as shown in FIG. 1, and will be described in more detail below.

Fig. 1 shows an environment in which a wireless mobile communication repeater is installed in a basement such as a building. The external transmission antenna 2 on the side of the wireless data base station 1 is installed in a high part such as a roof of a building. 21 is installed in the basement is connected to the external transmitting antenna (2) to make a radio wave transmission and reception between each other, a plurality of internal transmitting and receiving antennas (9) in the basement of the building each one of the repeater ( 21).

In addition, the wireless data base station 1 having the transmission and reception antenna 2 is spaced a predetermined distance from the above-mentioned building, and data transmission between the transmission and reception antenna 2 and the external transmission antenna 2 is performed on a medium such as air. It is caused by radio wave phenomenon.

At this time, if the building is generally referred to as the shaded area of the ground (where the radio waves of the base station are weakly reached) or in the suburbs (where the radio waves of the base station are not reached at all), the repeater cannot be installed and thus the user of the wireless terminal may occur. It is a cause for inhibiting their reliable use of wireless devices, for the following reasons.

In the case of the shaded area of the ground, the radio waves emitted by the internal transmission / reception antenna 9 are input to the external transmission / reception antenna 2 and cause interference with each other, so that the repeater 21 is oscillated and cannot be serviced. Due to the problem that the repeater cannot be installed and serviced because the radio wave from the wireless data base station cannot reach the external transmit / receive antenna 2, the radio wave is received from the limited area, that is, the base station, and the service area is underground. There was a problem that can only install and operate the existing repeater.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to enable reliable data communication in which radio wave interference does not occur even in a shaded or suburban area of the ground in wireless data communication. The purpose is.

Another object of the present invention is to make it possible to provide a wide range of data communication services at low cost in wireless data communication.

Another object of the present invention will be described in more detail in the configuration and operation to be described later.

1 is a block diagram showing data communication by a conventional repeater.

Figure 2 is a block diagram for showing a preferred dedicated line repeater system according to the present invention.

Figure 3 is a block diagram of a DONOR UNIT (mother station) of the dedicated line repeater according to the present invention.

4 is a block diagram of a REMOTE UNIT (own station) of a dedicated line repeater according to the present invention.

<Brief description of the major symbols in the drawings>

1. Wireless Data Base Station 2. Base Station Transceiver Antenna

3. RF signal detection terminal 4. Wireless data terminal

5. Dedicated Line Repeater DONOR UNIT 6. DSU (Data Service Unit)

7. Data leased line 8. Leased line repeater REMOTE UNIT

9. Dedicated line repeater transmit / receive antenna 10. Bidirectional filter unit

11. Signal amplifier 12. Frequency converter

13. Detection circuit 14. Signal converter

15. MODEM 16. High Frequency Amplifier

17. Frequency converter 18. Modulation circuit

19. Signal converter 20. MODEM

21. Repeater

According to the present invention, in a data communication using an RF signal between a wireless data base station and a wireless terminal, a donor unit for transmitting and receiving an RF signal with the wireless data base station; and a wireless data terminal with an RF signal A remote unit; And a repeater disposed between the home station and the home station to transmit data.

Preferably, the repeater is a master data service device for receiving an RF signal from the mother station and converts it into an electrical signal; and a slave data service device for receiving an electrical signal and converting it into an RF signal to the local station; And a data dedicated line providing a transmission path of an electrical signal between the master data service device and the slave data service device.

Preferably, the donor unit includes a bidirectional filter unit for receiving a radio wave input from an RF signal detection terminal of a wireless data base station, and a signal amplifier for amplifying the radio wave input from the bidirectional filter unit to a predetermined level. And a frequency converter for converting a frequency of radio waves of a signal input from the signal amplifier; and a detection circuit for receiving an RF signal of radio waves inputted to the frequency converter and converting the signal into an electrical signal. A signal converter for receiving a signal and converting the signal into a digital signal; a modem for modulating a signal converted from the signal converter and demodulating a signal input from a data service device; and a signal input from the modem A signal conversion unit for converting the signal into a signal; and a modulation circuit for modulating the analog signal converted from the signal conversion unit; A frequency converter for converting a frequency of the RF signal modulated by the inquiry path; and a high frequency amplifier for receiving and amplifying the RF signal converted from the frequency converter; and a high frequency amplifier for amplifying the RF signal. It consists of a bi-directional filter unit for transmitting the RF signal to the wireless data base station.

The remote unit may include a modem for demodulating a signal input to a data service device, a signal converter for converting a digital signal input from the modem into an analog signal, and an analog signal converted from the signal converter. A modulation circuit for modulating; and a frequency converter for converting a frequency of the RF signal modulated by the modulation circuit; a high frequency amplifier for receiving and amplifying the RF signal converted from the frequency converter; and the RF signal A bidirectional filter unit for transmitting an RF signal transmitted from the high frequency amplifying unit to amplify with a wireless data terminal; and a signal amplifier for amplifying a radio wave input from the wireless data terminal to a predetermined level through the bidirectional filter unit; and to the signal amplifying unit. A frequency converter for converting the frequency of the input radio wave; and receiving an RF signal of the radio wave inputted to the frequency converter. A signal converter converting the signal into an electrical signal; and a modem for modulating the signal converted from the signal converter.

In addition, a plurality of data service devices may be configured between the DONER UNIT and the plurality of REMOTE UNITs, and may be connected to a plurality of masters (masters # 1 to masters).

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

Figure 2 shows a preferred embodiment according to the present invention.

According to FIG. 2, a wireless data base station 1 and a wireless terminal 4 are published, and a mother station 5, a station 8 and a repeater 25 for data communication therebetween are configured, and the mother station 5 and The wireless data base station 1 is configured to be connected by wire to transmit and receive data, and the local station 8 is configured to transmit and receive an RF signal with the wireless terminal 4.

The repeater 25 is arranged on both sides of the data leased line 7 and the data leased line 7 to form a data service device 6 for signal conversion between the mother station 5 and the host station 8, and the mother station 5 The data service device 6 between the network and the data leased line 7 is called a master data service device, and the slave data service device 6 dependent on the master data service device on the data service device 6 of the host station 8 side. The plurality of slave data service devices 6 may be connected to one master data service device 6, and the mother station 5, which is responsible for the plurality of local stations 8, may also be composed of a plurality of slave stations. It is configured to enable the construction of a data communication network.

FIG. 3 is a block diagram showing the configuration of the mother station 5 of FIG. 2 in more detail. According to FIG. 3, the data service apparatus in the RF signal detection terminal 3 and the repeater 25 on the base station 1 side is shown. The structure of the mother station 5 arrange | positioned between (6) is shown well.

Specifically, the bidirectional filter unit 10 is disposed at the rear end of the RF signal detection terminal 3 to filter and output the RF signal so that the RF signal has a predetermined direction, and outputs a high frequency amplified signal applied from the high frequency amplification unit 16 to be described later. It is configured to filter to be directed toward the RF signal detection terminal (3).

The main station 5 includes a bidirectional filter unit 10 in contact with the base station 1 side and a modem 15 in contact with the repeater 25 side, and specifically, a bidirectional filter unit 10. The circuit for the RF signal toward the modem 15 side from the side) and the circuit for the RF signal toward the bidirectional filter unit 10 side from the modem 15 side are configured.

In particular, the configuration of the circuit directed from the bidirectional filter unit 10 toward the modem 15 includes a signal amplifier 11 for amplifying the RF signal filtered and output from the bidirectional filter unit 10 to a predetermined level, and a signal amplifier ( A frequency converter 12 for converting the frequency of the radio wave of the signal amplified and output from 11), a detection circuit 13 for receiving the RF signal of the radio wave inputted to the frequency converter 12 and converting it into an electrical signal; And modulating the converted signal from the signal converting unit 14 and the signal converting unit 14 which receives the converted electrical signal from the detection circuit 13 and converts it into a digital signal, thereby providing a signal to the data service device 6. It consists of a modem 15.

The configuration of the circuit directed from the modem 15 side to the bidirectional filter unit 10 side includes a signal converter 19 for converting a signal input through the modem 15 into an analog signal, and a signal converted from the signal converter 19. Modulation circuit 18 for modulating an analog signal, a frequency converter 17 for converting the frequency of the RF signal modulated by the modulation circuit 18, and amplified RF signal received from the frequency converter 17 And a bidirectional filter unit 10 for transmitting an RF signal transmitted from the high frequency amplifier unit 16 for amplifying the RF signal to the wireless data base station 1.

The configuration of the own country is configured in the reverse order with respect to the configuration of the mother country, as shown in FIG.

Specifically, the configuration of the slave station 8 disposed between the repeater 25 and the transmit / receive antenna 9 also includes a circuit configured from the repeater side 25 to the transmit / receive antenna 9 side like the configuration of the mother station 5. It is configured to be divided into a circuit consisting of a repeater 25 side from the transmitting and receiving antenna 9 side.

In the slave station 8, the circuit configured from the repeater 25 side to the transmit / receive antenna 9 side is the same as that of the circuit from the modem 15 side to the bidirectional filter unit 10 side in the mother station 5. Specifically, a signal converter 19 for converting a signal input through the modem 15 into an analog signal, a modulation circuit 18 for modulating the analog signal converted from the signal converter 19, and a modulation circuit A frequency converter 17 for converting the frequency of the RF signal modulated in 18, a high frequency amplifier 16 for receiving and amplifying the converted RF signal from the frequency converter 17, and amplifying the RF signal. The bidirectional filter unit 10 transmits an RF signal transmitted from the high frequency amplification unit 16 to the radio data base station 1.

The circuit configured in the slave station 8 from the transmitting / receiving antenna 9 side to the repeater 25 side is the same as the configuration of the circuit from the bidirectional filter unit 10 to the modem 15 side in the mother station 5. Specifically, the signal amplification unit 11 for amplifying the RF signal filtered and output from the bidirectional filter unit 10 to a predetermined level, and converts the frequency of the radio wave of the signal amplified and output from the signal amplifier 11 A frequency converter 12, a detection circuit 13 for receiving an RF signal of a radio wave inputted to the frequency converter 12, and converting the signal into an electrical signal, and an electrical signal converted from the detection circuit 13 And a modem 15 for modulating the signal converted from the signal conversion unit 14 to provide a signal to the data service device 6.

The operation of the leased line relay system applicable to all installation environments by the configuration as described above is as follows.

The mother station 5 receives the radio wave input from the RF signal detection terminal 3 of the wireless data base station 1, filters it in the bidirectional filter unit 10, amplifies the signal in the signal amplifier unit 11 to a predetermined level, The frequency converter 12 converts the frequency of radio waves.

The frequency-converted radio wave is input to the detection circuit, converted into an electrical signal, converted into a digital signal by the signal conversion unit, and applied to a modem, and the modem modulates the signal to transmit this signal through a data-only line, thereby master data service. Applied to the device.

In the data service device, a signal modulated by a modem is transmitted to a data dedicated line, and a signal applied through the data dedicated line is input to a slave data service device and applied to a modem of a local station.

The modem on the host side demodulates the signal and applies it to the signal conversion unit to convert the digital data into analog data. The modem modulates the signal in the modulation circuit and then applies the frequency conversion unit to convert the frequency of radio waves.

The frequency-converted radio wave is applied to the high frequency amplification unit, amplified, and then propagated to the wireless data terminal through the transmission and reception antenna through the bidirectional filter unit.

When the data is transmitted through the above process, the RF signal of the wireless data base station receives the RF signal of the base station, converts it into a signal suitable for transmission on the data dedicated line, and then transmits the data to a desired number of places using a plurality of low speed data dedicated lines. By transmitting the RF signal and converting it back to the original RF signal and firing radio waves in the service area, even in the shaded area on the ground or in the area where the radio wave of the base station does not reach at all because no interference occurs in the data communication with the user terminal. Data can be transmitted and received more stably.

Although the preferred embodiments of the present invention have been described in detail as described above, those skilled in the art will be able to modify or modify the present invention without departing from the spirit and scope of the present invention. It will be appreciated that changes can be made.

According to the present invention, unlike the conventional technology that it is difficult to apply a repeater on the ground, and the repeater can not be applied in the long distance, by using a data dedicated line in the communication method using a space (air) medium, The magnetic output is returned to the magnetic input to prevent the mutual interference (oscillation) phenomenon.

In addition, by using the data dedicated line to transmit data to an area (base station installation area) where the base station signal has not reached at all, enabling wireless data service, it is possible to use wireless data communication service more economically and effectively than base station installation cost. .

Claims (5)

In data communication using an RF signal between a wireless data base station and a wireless terminal, A mother station transmitting and receiving an RF signal with a wireless data base station; A local station transmitting and receiving an RF signal with a wireless data terminal; And And a repeater disposed between the mother station and the local station to transmit data. The method of claim 1, wherein the repeater A master data service device receiving an RF signal from the home station and converting the RF signal into an electrical signal; A slave data service device receiving an electrical signal and converting the signal into an RF signal to the local station; And And a dedicated data line for providing an electrical signal transmission path between the master data service device and the slave data service device. The method of claim 1, wherein the home country Bi-directional filter unit for receiving the radio wave input from the RF signal detection terminal of the wireless data base station; A signal amplifier for amplifying a radio wave input from the bidirectional filter unit to a predetermined level; A frequency converter for converting a frequency of radio waves of the signal input from the signal amplifier; A detection circuit for receiving an RF signal of a radio wave inputted to the frequency converter and converting the signal into an electrical signal; A signal converter configured to receive the converted electrical signal and convert it into a digital signal; A modem for modulating a signal converted from the signal conversion unit and demodulating a signal input from a data service device; A signal converter for converting a signal input from the modem into an analog signal; and a modulation circuit for modulating the analog signal converted from the signal converter; A frequency converter for converting a frequency of the RF signal modulated by the modulation circuit; A high frequency amplifying unit for receiving and amplifying the converted RF signal from the frequency converting unit; And And a bidirectional filter unit configured to transmit an RF signal transmitted from the high frequency amplifying unit for amplifying the RF signal to a wireless data base station. The method of claim 1, wherein the marks are A modem for demodulating a signal input to the data service device; A signal converter converting a digital signal input from the modem into an analog signal; A modulation circuit for modulating the analog signal converted from the signal converter; A frequency converter for converting a frequency of the RF signal modulated by the modulation circuit; A high frequency amplifier for receiving and amplifying the converted RF signal from the frequency converter; A bidirectional filter unit transmitting an RF signal transmitted from a high frequency amplifying unit amplifying the RF signal to a wireless data terminal; A signal amplifier for amplifying a radio wave input from the wireless data terminal to a predetermined level via a bidirectional filter; A frequency converter for converting a frequency of radio waves inputted into the signal amplifier; A signal converter which receives the RF signal of the radio wave inputted to the frequency converter and converts the signal into an electrical signal; And a modem for modulating the signal converted from the signal conversion unit. The method of claim 2, At least one slave data service device is connected to a master data service device.