KR20020037882A - System and method for detecting errors of mobile communication repeater - Google Patents

Abstract

PURPOSE: A system for detecting an error of a repeater for a mobile communication and a method therefor are provided to unifiably manage repeaters controlled by a BTS(Base Transceiver Station) at a low cost by confirming the error of the repeaters in real time by wireless. CONSTITUTION: A transmitting and receiving control unit(110) monitors and controls a transmitting and receiving state of a repeater(102) controlled by a BTS(101). An RF(Radio Frequency) data modem(120) transmits the transmitting and receiving state of the repeater(102) detected by the transmitting and receiving control unit(110) to the BTS(101). A repeating controller(130) informs the transmitting and receiving state of the repeater(102) received from the RF data modem(120) through the BTS(101) to a user in real time. A data matching device(140) matches an RF signal received from the RF data modem(120) to the BTS(101) to the repeating controller(130).

Description

System and method for detecting errors of mobile communication repeater}

The present invention relates to an error detection system and method for a mobile communication repeater, and more particularly, to a system and an error detection method capable of wirelessly real-time checking of an error of a repeater in a mobile communication system.

In general, cellular, PCS, and IMT-2000 systems, which are mobile communication systems, provide communication services to a plurality of mobile communication terminals by base stations installed one by one in a cell unit. At this time, each base station is fixedly installed, but the mobile communication terminal is changed in position according to the movement of the user, it may be located in the radio wave shadow area. Such a shaded area may be an interior of a building, an interior of an underground building such as a subway station or an underground shopping mall, or an enclosed place such as an elevator. In such a shaded area, a large path loss occurs even when the radio wave transmitted from the base station is transmitted to the inside of the building, and the propagation property inside the building is characterized by multipath fading having a very short delay. Therefore, when the radio wave of the base station is introduced into the building, the performance of the radio frequency signal is degraded. In addition, when the radio wave of the base station is transmitted to the back of a wall, an elevator, or the like, a shadow phenomenon is caused and the performance of the radio frequency signal is degraded. As such, when the mobile communication terminal is located in the radio wave shadow area, it is impossible to provide a high quality communication service due to deterioration of radio frequency signals.

Therefore, in order to provide a high quality communication service wherever a mobile communication terminal is located, techniques for extending a communication service area have been proposed. For example, it was invented by Klein S. Gilbusen et al., "US Patent No. 5, 280, 472 CDMA MICROCELLULAR TELEPHONE SYSTEM AND DISTRIBUTED ANTENNA SYSTEM THEREOR", invented by Mr. Chang-Heon Oh et al. Patent Application No. 96-15231, and the like. In the CDMA mobile communication system, delay relays CDMA communication signals between a plurality of distributed antennas and a base station transceiver, and a plurality of repeaters each communicate with a mobile communication terminal through an antenna. The distributed antenna system improves system performance by providing a communication service to a mobile communication terminal located in a radio shadow area by providing multipath signals for facilitating signal diversity.

In addition, the repeater in the mobile communication system as described above is not only remotely located from the base station but also operates unattended. Therefore, in the case of a failure in the repeater, in order to check this in the base station, conventionally used a wired method using a telephone line and a wireless method using a mobile communication terminal.

However, in the case of the conventional wired method of checking the failure of a repeater using a telephone line, there is a problem in that a telephone line must be installed for each repeater, thereby paying an installation fee and a fixed fee for the telephone.

In addition, in the case of the conventional wireless method of checking the failure of the repeater using a mobile communication terminal, each carrier or its own network can reduce the fixed cost of using the wired method, but each of the repeater equipment Since only good conditions can be monitored, there was a problem that can not be urgently responded in an emergency.

Accordingly, the present invention has been made to solve the above problems, by enabling wireless real-time check of the error of the repeater in the mobile communication system, it is possible to integrate and manage the repeaters controlled by the base station at a relatively low cost It is an object of the present invention to provide a repeater error detection system and method thereof.

In addition, the present invention provides a repeater error detection system and method that can significantly improve the reliability of the communication service to the user by allowing the mobile communication system to wirelessly check the error of the repeater in real time and quickly repair it. Has a different purpose.

1 is a block diagram of an error detection system of a mobile communication repeater according to an embodiment of the present invention.

2A and 2B are flowcharts illustrating an error detection method of a repeater for mobile communication according to one embodiment of the present invention;

FIG. 3 is an exemplary view illustrating error detection of a mobile communication repeater located in a shaded area in FIG. 1. FIG.

Explanation of symbols on the main parts of the drawings

110: transmission and reception control unit 120: radio frequency data modem

130: relay controller 140: data matching device

150: interface unit

In order to achieve the above object, the present invention provides a system for detecting an error of a repeater controlled by a base station, and according to a user's instruction, controls transmission and reception of the repeater, and monitors the transmission and reception state of the repeater to detect an error. Transmission and reception control means for; Radio frequency data transmitted to the base station by transmitting the user's instruction data received through the base station to the transmission and reception control means, and converts data on the transmission and reception status of the repeater detected by the transmission and reception control means to a radio frequency Conversion means; And relay control means for informing the user of the transmission and reception status of the repeater received through the base station in real time, receiving the user's instructions for controlling the repeater and transmitting to the radio frequency data conversion means through the base station; Include.

The present invention also provides a method for detecting an error in a repeater controlled by a base station of a mobile communication system, the method comprising: checking the power output level of the repeater for relaying a radio frequency signal transmitted to the base station, and checking the power in the repeater. Adjusting amplification gain value; A second step of converting a transmission / reception state and an alarm signal of the repeater into a radio frequency signal and transmitting the alarm signal to the base station as an error is generated in the repeater; And a third step of notifying a user of a transmission / reception state and an alarm signal of the repeater received through the base station, and controlling transmission and reception of the repeater according to a user's instruction.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a block diagram of an error detection system of a mobile communication repeater according to an embodiment of the present invention, the transmission and reception control unit 110 for monitoring and controlling the transmission and reception status of the repeater 102 that is controlled by the base station 101 of the mobile communication system And the radio frequency data modem 120 for transmitting the transmission / reception state of the repeater 102 detected by the transmission / reception control unit 110 to the base station 101, and the base station 101 from the radio frequency data modem 120. Relay controller 130 for informing the user of the transmission and reception status of the relay 102 received through in real time, and the radio frequency signal received from the radio frequency data modem 120 to the base station 101 relay controller 130 Is configured as a data matching device 140 for matching.

The transmission / reception control unit 110 detects an error of the repeater 102 while continuously monitoring the transmission / reception state of the repeater 102 and transmits the error to the radio frequency data modem 120. Here, the transmission and reception control unit 110 detects an error of the repeater 102 according to a reference time and a reference value set by the user through the user port (RS-232C) 103. That is, the transmission / reception control unit 110 determines the error of the repeater 102 when it is out of the alarm state reference value range set by the user.

As such, the transmission and reception control unit 110 is installed inside the repeater 102 to monitor the transmission and reception status of the repeater 102 and to perform the transmission and reception function of the repeater 102 according to the user's instructions input through the relay controller 130. To control.

On the other hand, the radio frequency data modem 120 may be installed inside the repeater 102 together with the transmission and reception control unit 110, or may be installed outside the repeater 102.

The radio frequency data modem 120 has a phone number and a unique number (ESN: Electronic Serial Number) for identifying itself at the base station 101 and the relay controller 130, and by the phone number and the ESN. Call authority may be granted from the base station 101. Here, the position of the repeater connected to the radio frequency data modem 120 in the relay controller 130 may be identified or identified using the telephone number and the ESN of the radio frequency data modem 120. That is, the base station 101 can confirm that the signal for the transmission and reception state of the repeater transmitted from the radio frequency data modem 120 is a signal indicating the transmission and reception state of the repeater 102 monitored by the transmission and reception control unit 110. .

In addition, the transmission / reception control unit 110 and the radio frequency data modem 120 transmit a signal for the transmission / reception state of the relay 102 and the control command of the user's repeater 102 input through the relay controller 130 to the interface unit ( Exchange through 150). Here, the interface unit 150 may use various interfaces such as a UART interface, a JTAG interface, a user interface, and a 3-Wire Serial interface, an IrDA interface, and a Bluetooth interface.

The relay controller 130 displays the transmission / reception status of the relay 102 received through the base station 101 and the data matching device 140 so that the user can visually check the error, or the error of the relay 102 received. It generates an alarm signal to inform the user. In addition, the relay controller 130 receives and provides a control command of a user for a plurality of repeaters controlled by the base station 102.

The data matching device 140 is a data protocol processing device located in a mobile communication switching center. The data matching device 140 transmits data received from the base station 101 to the relay controller 130 through the internet network, and is input from the relay controller 130. The data input through the Internet network is transmitted to the base station 101. The data matching device 140 includes an IWF (Inter Working Function).

On the other hand, the repeater 102 is installed indoors or outdoors, and is installed in the radio shadow area or non-shaded area.

The operation of the error detection system of the repeater of the present invention having the structure as described above will be described in detail. However, repeaters are installed indoors or outdoors and are installed in radio shadow areas or non-band areas.

First, in order to monitor the transmission and reception state of the repeater 102, the call right of the radio frequency data modem 120 should be given from the base station 101. For this, the process is as follows.

When the base station 101 transmits the radio number for the radio frequency data modem 120 and the radio wave requesting the ESN through the antenna 1, the repeater 102 receives the radio wave through the antenna 2 and then transmits the radio wave again through the antenna 3. do. Thus, the radio wave relayed through the repeater 102 is received by the radio frequency data modem 120 through the antenna 4.

As such, when the radio wave is transmitted from the base station 101, the radio frequency data modem 120 transmits the radio wave indicating its telephone number and the ESN through the antenna 4, and then the radio frequency data amplified through the repeater 102. The data signal of the modem 120 is transmitted to the base station 101 through the antenna 2 again.

As such, when the data signal of the radio frequency data modem 120 amplified through the repeater 102 is received at the base station, the base station 101 checks whether the call is possible using the received telephone number and the ESN, and then the radio frequency data modem. Grant the call right of (120).

After the call authority is granted to the radio frequency data modem 120 through the above process, the transmission and reception state of the repeater 102 is monitored as follows.

The transmission and reception control unit 110 continuously monitors the transmission and reception state while controlling the transmission and reception of the repeater 102 and transmits the monitoring result to the radio frequency data modem 120, where the transmission and reception control unit 110 sets the alarm state reference value set by the user. The error of the repeater 102 may be determined by comparing with an internal temperature range, an overpower state, a power state, a fan state, and a part radio frequency module state. In addition, even when the alarm itself is generated when the error of the repeater 102 occurs, the transmission and reception control unit 110 determines the occurrence of the error of the repeater 102.

At this time, if it is determined that an error occurs in the repeater 102, the transmission and reception control unit 110 transmits the specific details of the error occurred in the repeater 102 to the radio frequency data modem 120.

As such, when data on an error of the repeater 102 is input from the transmission and reception control unit 110, the radio frequency data modem 120 converts the data into radio frequency and transmits the data to the base station 101. At this time, the radio frequency signal transmitted through the antenna 4 of the radio frequency data modem 120 is received by the repeater 102 through the antenna 3, and then the repeater transmits the radio frequency signal to the base station 101 through the antenna 4. do.

If the repeater 102 cannot relay the radio waves transmitted and received between the radio frequency data modem 120 and the base station 101 due to an error, the radio waves transmitted from the base station 101 through the antenna 1 may cause the antenna 4 to fail. The radio wave is received by the radio frequency data modem 120 and the radio wave transmitted from the radio frequency data modem 120 through the antenna 4 is received by the base station 101 through the antenna 1.

When the data on the error of the repeater 102 is received by the base station 101 through the above process, the base station 101 transmits the data to the relay controller 130 through the data matching device 140. . Subsequently, the relay controller 130 displays the transmission / reception status of the relay 102 input by the base station 101 in real time so that the user can visually check or receive an error of the relay 102 received. Generates an alarm signal to notify in real time.

Therefore, the user can quickly repair the error occurring in the relay 102, or control the relay 102 remotely through the relay controller 130.

On the other hand, when the repeater that is applied to the present invention is located in the shaded area, the process of the radio frequency relay through the repeater 102 will be described in detail with reference to FIG.

In order for the radio frequency propagated from the base station 101 to be transmitted to the radio frequency data modem 120 located in the shadow area, the radio frequency propagated from the base station 101 must pass through the repeater 102 located in the shadow area. Here, the repeater 102 in the shadowed area receives the radio frequency propagated from the base station 101 through the antenna 2 in the non-shaded area, and then receives the radio frequency through the antenna 3 in the shadowed area. Transmit to 120.

On the contrary, the radio frequency transmitted from the radio frequency data modem 120 in the shaded region is received by the repeater 102 through the antenna 3 in the shaded region, and the repeater 102 then transmits the radio frequency to the antenna 2 in the non-shaded region. It transmits to the base station 101 through.

Of course, the data transmission between the repeater and the radio frequency data modem may use a wired, wireless, infrared or the like, and may be integrated or detached with the repeater.

That is, in the error detection system according to the present invention, the error of the repeater located in the shadow area is detected through the transmission path.

In addition, in FIG. 3, the antenna 4 of the radio frequency data modem 120 may be installed in a non-shaded area so that the transmission is directly performed between the antenna 4 and the antenna 1 without passing through a repeater.

Next, a process of detecting an error of the repeater through the error detection system of the repeater of the present invention as described above will be described in more detail with reference to FIGS. 2A and 2B.

When the base station 101 transmits the radio frequency signal (201), the repeater 102 receives the radio frequency signal through the antenna 2 and transmits it through the antenna 3 (202). At this time, the transmission / reception control unit 110 monitors the transmission / reception state of the repeater 102 (203), and determines whether the output power level of the repeater 102 is higher than the preset reference power level (204).

If it is determined that the transmission power is higher than the reference power, the transmission and reception control unit 110 adjusts the power amplification gain value in the repeater 102 according to the reference gain value preset by the user, and thus the transmission power of the repeater 102. After adjusting the level down to the reference power level level, the process proceeds to the transmission and reception monitoring process (203) (205). Here, the reference gain value is a gain value preset for a field environment or a gain value wirelessly set by the user through the relay controller 130.

If it is determined in step 204 that the transmission power is not higher than the reference power, the transmission / reception control unit 110 determines whether an alarm due to an error has occurred in the repeater 102 (206). , The current state of the repeater 102 is maintained.

Here, if the determination result is an alarm, the transmission and reception control unit 110 transmits the transmission and reception status and the alarm signal of the repeater 102 to the relay controller 130 through the radio frequency data modem 120 and the base station 101 ( 207). In addition, the transmission / reception control unit 110 transmits query data requesting whether the transmitted data is normally received by the relay controller 130 to the relay controller 130 (208).

In addition, the transmission / reception control unit 110 confirms whether the response to the query data is received from the relay controller 130 (209), and if not, the process proceeds to the data transmission process 207. In the confirmation process 209, if a response to the query data is received, the transmission and reception control unit 110 stores the data on the transmission and reception status of the repeater 102 transmitted to the relay controller 130 (210).

At this time, the relay controller 130 displays the alarm state of the repeater 102 and generates an alarm for notifying the occurrence of the error of the repeater 102 (211), for adjusting the transmission and reception state of the repeater 102 from the user Check whether the control command has been input (212). As a result of the check, if a control command is input, the relay controller 130 transmits the user's instruction to the radio frequency data modem 120 wirelessly through the base station 101, and then the transmission / reception control unit 110 receives the received user's instruction. In accordance with the instruction, the transmitter / receiver end control of the repeater 102 and the alarm state range are adjusted (213).

However, if the control command is not input in the confirmation process 212, the relay controller 130 transmits the error state of the repeater 102 to another user (for example, A / S personnel) to repeat the relay (102) Directly instruct to repair (214).

On the other hand, the present invention may be applied to a radio frequency modem for a vehicle-mounted highway automatic toll collection system using an optical relay system, a wireless meter reading system and a mobile communication network. This is possible because the optical relay system is very similar to the radio frequency relay system. The difference between the two systems is that the radio frequency relay system is wirelessly reversed and the optical relay system is connected by an optical cable.

Therefore, the present invention can be applied not only to the optical relay system but also to all communication systems in the usable area of the radio frequency data modem in the manner applied to the radio frequency relay system.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, the present invention has the following effects by wirelessly checking the repeaters located in the cell area controlled by a specific base station in real time.

First, by transmitting the error of the repeater wirelessly through the radio frequency data modem, it is possible to monitor the repeaters controlled by a plurality of base stations at the same time through one relay controller.

Second, it is possible to simultaneously monitor the transmission / reception status of a plurality of repeaters through one relay controller, and minimize fixed costs by using the operator's own network.

Third, by simultaneously monitoring a plurality of repeaters in real time, it is possible to efficiently manage a mobile communication network.

Fourth, since the error of the repeater in the mobile communication system in real time by wireless can be quickly repaired, the communication quality of the mobile communication can be significantly increased.

Claims (13)

A system for detecting an error in a repeater controlled by a base station, Transmission and reception control means for controlling transmission and reception of the repeater according to a user's instruction, and detecting an error by monitoring the transmission and reception status of the repeater; Radio frequency data transmitted to the base station by transmitting the user's instruction data received through the base station to the transmission and reception control means, and converts data on the transmission and reception status of the repeater detected by the transmission and reception control means to a radio frequency Conversion means; And Relay control means for informing the user of the state of transmission and reception of the repeater received through the base station in real time, receiving the user's instruction for controlling the repeater and transmitting the received instructions to the radio frequency data converting means through the base station. Error detection system of a repeater comprising a. The method of claim 1, And the base station and the relay control means exchange data through a data matching device installed in a mobile communication switching center. The method of claim 2, And said data matching device and said relay control means exchange data via an internet network. The method of claim 1, The transmission and reception control means, The error detection system of the repeater, characterized in that for controlling the transmission and reception function of the repeater in accordance with the user's instructions input through the relay control means. A system for detecting an error in a repeater controlled by a base station, Transmission and reception control means for controlling transmission and reception of the repeater according to a user's instruction, and detecting an error by monitoring the transmission and reception status of the repeater; And Radio frequency data transmitted to the base station by transmitting the user's instruction data received through the base station to the transmission and reception control means, and converts data on the transmission and reception status of the repeater detected by the transmission and reception control means to a radio frequency Means of conversion Error detection system of a repeater comprising a. The method according to claim 4 or 5, The transmission and reception control means, The error detection system of the repeater, characterized in that installed in the repeater. The method according to claim 4 or 5, The transmission and reception control means, Error detection system of the repeater, characterized in that installed in the outside of the repeater. The method according to any one of claims 1 to 5, The transmission and reception control means, According to a predetermined reference time and reference power to determine the error of the radio frequency transmission power of the repeater, And the predetermined reference time and reference power are set by a user through a user port connected to the transmission and reception control means. A method for detecting an error in a repeater which is controlled by a base station of a mobile communication system, A first step of checking a power output level of the repeater for relaying a radio frequency signal transmitted to the base station, and adjusting a power amplification gain value in the repeater; A second step of converting a transmission / reception state and an alarm signal of the repeater into a radio frequency signal and transmitting the alarm signal to the base station as an error is generated in the repeater; And A third step of informing a user of a transmission / reception state and an alarm signal of the repeater received through the base station and controlling transmission and reception of the repeater according to a user's instruction; Error detection method of the repeater comprising a. The method of claim 9, The first step is, A step 1-1 in which the repeater repeats a radio frequency signal transmitted from the base station; A first and second steps, by a transmission / reception control unit monitoring the transmission / reception state of the repeater and determining whether the transmission power level of the repeater is higher than a predetermined reference power level; If it is determined that the output power of the repeater is higher than the predetermined reference power, the transmission / reception control unit adjusts the power amplification gain value in the repeater according to a predetermined reference gain value to determine the output power level of the repeater. A first step 1-3, after adjusting to a predetermined reference power level level, the process proceeds to the first and second steps; If it is determined that the transmission power of the repeater is not higher than the predetermined reference power, step 1-4 to go to the second step Error detection method of the repeater comprising a. The method of claim 9, The second step, A step 2-1 of the transmitting and receiving control unit determining whether an alarm due to an error has occurred in the repeater; A second step of maintaining the current state of the repeater if the alarm is not generated from the repeater as a result of the determination; And If the alarm is generated from the repeater as a result of the determination, the transmission and reception state of the repeater and the alarm signal are converted into a radio frequency signal, and transmitted to the relay controller through the base station, and wirelessly transmits query data for requesting reception of the radio frequency signal. Step 2-3 of converting the frequency signal to the relay controller Error detection method of the repeater comprising a. The method of claim 9, The third step, The transmission and reception control unit checks whether a response to the query data is received from the relay controller in step 3-1; Step 3-2, if the response is not received, the process proceeds to the second step; If the response is received as a result of the determination, the transmission / reception control unit storing step 3-3 of the transmission / reception state of the repeater transmitted to the relay controller; Step 3-4, wherein the relay controller displays the transmission / reception status of the repeater and generates an alarm for notifying the occurrence of an error of the repeater; The repeater controller checks whether a control command for adjusting a transmission / reception state of the repeater has been input from a user; If the control command is inputted as a result of the checking, the relay controller transmits an instruction of a user to the transmission / reception control unit wirelessly through the base station; Step 3-7, wherein the transmission and reception control unit controls transmission and reception of the repeater according to a user's instruction transmitted from the relay controller; And If the control command is not inputted as a result of the checking, the relay controller directly transmits an error state of the repeater to another user to directly instruct the repairer of the repeater; Error detection method of the repeater comprising a. The method according to any one of claims 9 to 12, And said predetermined reference power level and said predetermined reference gain value are set by a user, respectively.