KR20010008369A - A monitoring system of mobile communication repeaters. - Google Patents

Abstract

PURPOSE: A relay monitoring system is provided to reduce management cost by use of a remote monitoring unit installed at a base station and two remote monitor units each installed at ultra small-scale relays. CONSTITUTION: The device includes the first remote monitor unit(10) and the second remote monitor unit(26). The remote monitor unit(10) is installed at a mobile communication base station(14). Radio digital data of a transmitter(TX) of the remote monitor unit(10) is transmitted through a transfer line(34) and an antenna(16) of the base station. A digital signal is transferred to a transceiver connector of an ultra small-scale relay(20) through a transfer line(42) from a relay Yagi antenna(18). The transferred digital signal is amplified and then is detected as a signal attenuated by a radio coupler(24) between the relay and a patch antenna. The detected signal is transferred to a receiver of the remote monitor unit(26) through a transfer line(26).

Description

Repeater monitoring system device for mobile communication {A monitoring system of mobile communication repeaters.}

As consumers' demand for mobile communication service is growing, the shadow area is removed and the call quality is improved due to the distribution and installation of ultra-small repeaters.

However, most of the current ultra-small and small repeaters do not have a device that can be monitored and managed, which makes it difficult to operate, among which, the failure of the repeater is adversely affecting the operation of the base station. In order to solve the problem of the repeater provides a repeater monitoring system for mobile communication.

The present invention relates to a repeater monitoring system device for use in mobile communication, and in particular, to provide a facility operation and method as a remote control and monitoring system for ultra-small repeaters.

In the case of using a small or small repeater to solve the shadow area in mobile communication, an error may appear upon reception due to the interference of unnecessary radio waves generated directly or indirectly, which may cause a deterioration of the call quality.

It is necessary to gradually increase the management cost and increase the number of operating personnel to improve or manage the disturbance of unnecessary radio waves caused by the error of the repeater already installed. In the management of repeaters that are not equipped with remote and supervisory control devices, a lot of time is actually put into the management of the miniature repeaters, and when a problem occurs, the base station may have a great effect and thus degrade call quality.

Even if you find these technical problems in the operation of a small repeater, you need to visit the field to solve them.

An object of the present invention is shown in the examples of Figures 1, 2, 3 as a method for improving the call quality of the mobile communication to solve the above problems of the prior art. In order to operate the monitoring system without visiting the site where the repeater is installed, the operator installs the main modem transceiver connected from the base station to the repeater in each base station unit and assigns each unique code to the repeater so that the communication between the modems can wirelessly assign its own frequency. It saves the cost by reusing the frequency by using the empty channel to avoid the current channel. Remote monitoring or control, temporary interruption of each repeater, or self-diagnosis can be performed, and early restoration of such repeaters is necessary to secure call quality in mobile network operation.

1 is a basic configuration of an embodiment to which the repeater monitoring system apparatus for mobile communication of the present invention is applied.

* Description of the symbols for the main parts of the drawings *

10: Repeater monitoring system device for mobile communication (main device, Main)

12: computer device for controlling the main device

14: General Base Station

16: Outdoor type antenna of general base station

18: outdoor Yagi antenna of relay station

20: small repeater or ultra small repeater

22: small repeater or ultra small repeater antenna (indoor antenna)

24: high frequency coupler

26: remote monitoring device (type A)

28: remote monitoring device (type B)

30: indoor detection antenna

32: Cable for remote monitoring device (main device, Main, 10)

34: transmission line (coaxial cable) connecting the output (Tx) of the remote monitoring device (main unit, Main, 10) to the base station antenna (16)

36: Transmission line between the base station antenna 16 and the remote monitoring device 10 input (Rx)

38: downlink transmission channel (1845 MHz)

40: Uplink frequency transmission channel (1755 MHz)

42: transmission line between Yagi antenna (external, 18) and small repeater 20 in the room

44: transmission line between the indoor detection antenna (30) and the remote monitoring device type B (28)

46: transmission line between the receiving end of the high frequency coupler 24 and the remote monitoring device (type 26, A)

48: Transmission line between the transmitting end of the high frequency coupler 24 and the remote monitoring device (type 26, A)

50: transmission line between the small repeater 20 and the indoor antenna 22

52: data transmission line between computer 12 and central data center

Figure 2 is a basic configuration of a remote monitoring device (Remote "B" type) in the embodiment to which the repeater monitoring system apparatus for mobile communication of the present invention is applied.

* Description of the symbols for the main parts of the drawings *

18: Outdoor type Yagi antenna of the remote monitoring device

56: Miniature repeater with built-in antenna

58: indoor external antenna (for detection)

60: duplexer for transmitting and receiving separation

62: transmission / reception circuit of remote monitoring device (type B)

132: Digital Board

130: FSK modem

134: power remote control (switch)

70: HPA (High Power Amplifier)

72: Band Pass Filter

74: Drive amp

136Band Pass Filter

138: Mixer, Up Converter

40 local oscillator amplifier

142: PLL (Local Oscillator)

144: Band Pass Filter

86: LNA (Low Noise Amplifier)

88: Band Pass Filter

90: RF AMP (High Frequency Amplifier)

146: Band pass filter

148 Down mixer

150: local oscillator amplifier

152: Downward Local Oscillator (PLL)

154: Band Pass Filter

102: transmission line between the duplexer and the detection antenna

104: transmission line between the duplexer and the receiving end of the transceiver circuit

106: transmission line between the duplexer and the transmitting end of the transceiver circuit

168: high frequency detection transmission line for receiving signal level measurement

164: Transmission data transmission line between FSK modem and digital board

170: Receive data transmission line between FSK modem and digital board

160: line for controlling the power remote control switch in the digital board

176: external power lead wire (AC 220 volts)

178: a power line for supplying power to the power supply of the micro repeater from the power remote control switch

Figure 3 is a basic configuration of a remote monitoring device (Remote "A" type) in the embodiment to which the repeater monitoring system apparatus for mobile communication of the present invention is applied.

* Description of the symbols for the main parts of the drawings *

18: external Yagi antenna of the remote monitoring device

20: antenna built-in micro repeater

26: transceiver circuit

134: digital board

130: FSK modem

134: power remote control (switch)

136: Band pass filter

138: Mixer, Up Converter

140: local oscillator amplifier

142 Upward Local Oscillator

146: Band pass filter

148: Mixer, Down Converter

150: local oscillator amplifier

152: downward local oscillator

154: Band pass filter of downlink intermediate frequency

46: transmission line between the high frequency coupler and the receiving end of the transmission and reception circuit 26

164: transmission data transmission line between FSK modem and digital board

166: transmission line between the high frequency coupler and the transmitting end of the transmission and reception circuit 26

168: high frequency detection transmission line for receiving signal level measurement

170: Receive data transmission line between FSK modem and digital board

160: a line for controlling the power remote control switch 134 in the digital board 132

172: a data transmission line between the FSK modem 130 and the transmission intermediate frequency end of the transmission / reception circuit 26

174: data transmission line between the FSK modem 130 and the reception intermediate frequency end of the transmission / reception circuit 26

176: external power lead wire (AC 220 volts)

178: a power line for supplying power to the power supply of the micro repeater 20 in the power remote control switch 134

For typical down frequency:

In order to achieve the above object, the present invention provides the high frequency digital data of the transmitting end TX of the remote monitoring apparatus 10 (main unit Main) installed in the mobile communication base station 14 in the example of FIG. 1 through a transmission line 34. It propagates through an antenna 16 of 38 and transmits a signal to an external Yagi antenna 18 of the repeater. The digital signal transmitted from the repeater Yagi antenna 18 to the transmission / reception connector of the micro repeater 20 through the transmission line 42 is amplified to a certain level and attenuated by the high frequency coupler 24 located between the micro repeater and the indoor patch antenna. The signal is detected and transmitted to the receiver of the remote monitoring device (Remote " B " type) 26 via the transmission line 46.

2 of the remote monitoring device (Remote "A" type) 26

Description of operation of internal receiving circuit:

The high frequency digital signal received at the receiver of the remote monitoring device 26 is transmitted to the downlink mixer 148 through the band filter 146. The local oscillator 152 oscillates the 1579 MHz frequency and amplifies the frequency to a predetermined level required by the frequency mixer 148 through the amplifier 150 to make the intermediate frequency 266 MHz, and receives the FSK modem 130 through the band filter 154. Is passed to 174. The digital signal from which the high frequency component is removed from the FSK modem 130 is transmitted to the digital board 132 through the digital receiving transmission line 170, and the digital board equipped with the central processing unit 132 detects whether there is an abnormality in the repeater. Then, the level of the received signal is detected and the detection signal is input to the digital board 132 through the detection line 168. In this way, by receiving the high frequency digital signal 1845 MHz (38) received through the micro repeater 20 normally, it is possible to monitor the presence or absence of an abnormality in the receiver of the micro repeater 20, and the reception level can be measured.

Of the remote monitoring device (Remote " B " type) 62 in FIG.

Description of operation of internal receiving circuit:

The signal 1845 MHz 38 received at the external Yagi antenna 18 propagates into space through the internal antenna of the micro repeater 56 via the transmission line 42.

The detection antenna 58 of the monitoring apparatus adjacent to the built-in antenna detects the indoor radio signal 1845 MHz of the repeater and is transmitted to the transmission line 104 through the duplexer 60. The high frequency digital signal received at the receiver of the remote monitoring device 62 is amplified by the low noise amplifier (LNA) 86 and amplified to a predetermined level through the high frequency amplifier (RF AMP) 90 through the band filter BPF (88). . Passed through the band filter 146 to the downlink mixer 148. The local oscillator 152 oscillates the 1579 MHz frequency and amplifies the frequency to a predetermined level required by the frequency mixer 148 through the amplifier 150 to make the intermediate frequency 266 MHz, and receives the FSK modem 130 through the band filter 154. Is passed to 174. The digital signal from which the high frequency component is removed from the FSK modem 130 is transmitted to the digital board 132 through the digital receiving transmission line 170, and the digital board equipped with the central processing unit 132 detects the presence or absence of a repeater. Then, the level of the received signal is detected and the detected signal is input to the digital board 132 through the detection line 168. In this way, by receiving the high frequency digital signal 1845MHz (38) received through the antenna-integrated miniature repeater 56 normally, it is possible to monitor the presence or absence of an abnormality in the receiver of the miniature repeater 56, and the reception level can be measured.

For typical upstream frequencies:

3 of the remote monitoring device (Remote "B" type) 62

Description of operation of internal transmission circuit:

The digital board 132 equipped with the central processing unit detects whether there is an abnormality in the repeater and responds according to the instruction of the remote monitoring apparatus (Main) of the base station. The transmission data signal of the digital board 132 is modulated and output to 249.5 MHz of intermediate frequency digital data to the transmitting end 172 of the FSK modem 130 through the digital transmission transmission line 164 and upward through the band filter 144. Input to frequency mixer 138. The local oscillator 142 frequency oscillates 1505.5 MHz to amplify to a predetermined level required by the frequency mixer 138 through the amplifier 140 to select a high frequency uplink frequency 1755 MHz through the band filter 136. The selected 1755 MHz uplink transmit signal is amplified to a certain level by an amplifier 74 (Drive amp), amplified to a predetermined level by a band filter 72 and a power amplifier (HPA) 70, and then duplexed through the transmission line 106 (60). Is applied to 1755 MHz. It is transmitted to the built-in antenna of the micro repeater 56 through the detection antenna 58. The miniature repeater 56 amplifies the 1755 MHz signal at a constant level up to 1755 MHz to the remote monitoring device 10 of the base station 14 through the transmission line 42 through the Yagi antenna 18 at the uplink frequency 1755 MHz (40). Transmit high frequency digital data.

2 of the remote monitoring device (Remote "A" type) 26

Description of operation of internal transmission circuit:

The digital board 132 equipped with the central processing unit detects whether there is an abnormality in the repeater and responds according to the instruction of the remote monitoring apparatus (Main) of the base station. The transmission data signal of the digital board 132 is modulated and output to 249.5 MHz of intermediate frequency digital data through the digital transmission line 164 to the transmitting end 172 of the FSK modem 130 and the uplink frequency through the band filter 144. Input to mixer 138. The local oscillator 142 frequency oscillates 1505.5 MHz to amplify to a predetermined level level required by the frequency mixer 138 through the amplifier 140 to select a high frequency uplink frequency 1755 MHz through the band filter 136. The selected 1755 MHz uplink frequency transmission signal is applied to the coupler 24 via the transmission line 48. The micro repeater 20 amplifies the 1755 MHz signal upward by a certain level, and transmits the high frequency to the remote monitoring device 10 of the base station 14 at the uplink frequency 1755 MHz (40) through the external Yagi antenna 18 through the transmission line 42. Send digital data.

Self Diagnosis Program:

After connecting to the micro repeater, the self-diagnosis program is first operated after the initial power connection to determine whether the remote monitoring devices 26 and 62 have their own abnormalities.

Self-diagnosis frequency is used by selecting 1800MHz, which is halfway between 1845MHz and 1755MHz upward frequency. This frequency is used only for self-diagnosis in the internal circuit without transmitting to the outside, and oscillates the oscillation frequency of the local oscillator 152 to 1534 MHz initially. In addition, the oscillation frequency of the local oscillator 142 is initially oscillated to 1550.5 MHz.

A high frequency coupler 24 of FIG. 2 or a high frequency duplexer of FIG. 3 is made by mixing the upstream intermediate frequency 249.5MHz and the local oscillation frequency 1550.5 to make 1800MHz through the uplink circuit terminations 48 and 106 of the remote monitoring devices 26 and 62. Through 60, the signal is attenuated considerably into the downlink circuit inputs 46 and 104 of the remote monitoring devices 26 and 62. The self-diagnostic frequency of 1800 MHz is mixed with the frequency 1534 MHz of the local oscillator 152 to obtain an intermediate frequency 174 of 266 MHz.

As a result, the upstream intermediate frequency 172 of the FSK modem 249.5MHz returns to the downstream intermediate frequency 266MHz 174 through the transmission / reception circuit (termination, input terminal) of the remote monitoring apparatus by the operation of the local oscillation frequencies 142 and 152.

The digital board 132 of the remote monitoring devices 26 and 62 detects the self-diagnosis signal and transmits the processing result at an uplink frequency of 1755 MHz, and the remote monitoring device 26 (main, 10) to the remote monitoring device (Main, 10) of the base station 14. Report with the ID code of 62).

The existing allocated frequency can be obtained by using one remote monitoring device (10, main, main) installed in the base station and two types of remote monitoring devices (26, 62, Remote A, B type) installed in each micro repeater. Operational costs are reduced by reusing and using existing wireless networks.

In particular, since it does not use its own CDMA network, it operates without disrupting existing communication and adds to an existing facility, thereby greatly reducing facility costs.

Each unique number (ID CODE) can be assigned and monitored on a number of micro repeaters to help prevent call quality by preventing unnecessary radio waves at an early stage.

A mobile operator operator can remotely control a repeater from a base station without visiting the area where each repeater is installed.

It is possible to know whether there is a malfunction at the base station, and if necessary, the computer can be automatically cut off or supplied by operating the computer program.

Claims (6)

A connecting circuit for detecting a high frequency digital signal through a micro repeater using an attenuator including a detecting coupler between the micro repeater and the indoor antenna. In the case of a miniature repeater with a built-in antenna, a circuit for detecting a high frequency digital signal through a micro repeater by installing an attenuator including a detection antenna at a predetermined distance from the repeater instead of the coupler. A connection circuit comprising a transmission / reception frequency other than frequencies 1845 MHz and 1755 MHz, or an FSK modem frequency other than 266 MHz 249.5 MHz, as an intermediate frequency used through a micro repeater. A circuit for detecting digital signals by using a method of modifying a modulation method including an FSK method in digital modulation demodulation. The self-diagnosis program operates the frequencies of the local oscillators 142, 152 to operate at a frequency other than the 1800 MHz up and down frequencies, including the transmitter and receiver terminals 104 and 106 of the remote monitoring device or the transmitter and receiver terminals 46 of the remote monitoring device A type. 48) A connection circuit comprising a self-diagnosis program operated using the same frequency In order to cut off or supply the ultra small repeater, the power switch 134 is remotely controlled from the digital board 132, and the ultra small repeater 20, 56 is connected to the remote control switch 134 and the base station (14) a connection circuit configured to indirectly control and operate ultra-small repeaters remotely from the computer 12;