KR100496061B1 - Code domain analyzing system of cdma base station - Google Patents

Abstract

The present invention relates to a code region analysis system of a CDMA base station, and more particularly, a switching unit for sequentially switching a plurality of transmission signals or reception signals, and a channel and a channel signal of a CDMA code region in a transmission signal or a reception signal transmitted through the switching unit. A code region analysis unit including a code region processing unit for measuring and analyzing a transmission / reception code state, a communication unit for transmitting the analysis result of the transmission / reception code state of the code region processing unit, a switching unit, a code area processing unit, and a control unit for controlling the communication unit, and a code region And a base station monitoring device receiving the analysis result of the transmission and reception code state from the analysis unit and using the transmission and reception state information of the base station, and a base station control unit controlling the transmission processing unit or the reception processing unit by the base station monitoring apparatus. Therefore, the present invention can monitor the state of the base station by a code region analyzer for measuring the channel state of the code region through the transmission and reception signals at the transmitting and receiving end of the CDMA base station.

Description

CODE DOMAIN ANALYZING SYSTEM OF CDMA BASE STATION

The present invention relates to a CDMA base station, and more particularly, to a code region analysis system of a CDMA base station capable of monitoring and remotely controlling a state of a base station by measuring a channel state of a code region through a transmission / reception signal of a CDMA base station.

In general, CDMA is also called Code Division Multiple Access, which allows users to send and receive signals while sharing time and frequency, and has 10 times more capacity than the conventional analog mobile phone service (AMPS). The quality is also excellent. It is a kind of multiple access method using spread-spectrum communication technology. Spread-band communication is a signal spread by spreading the signal to a bandwidth much wider than the bandwidth of the signal to be transmitted, it is difficult to detect the presence or absence of the signal because the power density of the signal is lowered. In addition, the receiver must know exactly the code used to spread the original signal in the process of despreading the received signal, thereby ensuring the confidentiality of the communication. Do not disturb

1 is a block diagram showing a transceiver of a CDMA base station according to the prior art.

As shown in FIG. 1, a conventional CDMA base station includes an antenna 10, a transmit processor and a receive processor of a signal transmitted and received through a filter 12. The transmission processor includes a baseband frequency processor 24, a modulator 22, an up-converter 18, an amplifier 16, and a first combiner 14 for generating a baseband frequency. ), And the like. The reception processor includes a low noise amplifier (LNA) 34, a second combiner 32, a down converter 30, a demodulator 26, a baseband frequency processor 24, and the like. . Here, the modulator 22, the baseband frequency processor 24, and the demodulator 26 may be configured as one digital modulator / demodulator 20.

The transmission path in the transceiver of the CDMA base station configured as described above is as follows. The modulator 22 modulates using baseband quadrature (Q) and in-phase (I) signals and a carrier signal provided by the baseband frequency processor 24. The modulated signal upconverts the frequency through the upconverter 18. The amplifier 16 amplifies the signal to an output power level of a radio frequency required for cell site transmission. The amplified signal generates a copy of the radio frequency signal through the first combiner 14 and is transmitted through the filter 12 and the antenna 10.

On the other hand, the reception path is as follows. The signal received at the antenna 10 is gain adjusted by the LNA 34 via the filter 12. The second combiner 32 then captures a copy of the received radio frequency signal. The down converter 30 down-converts the frequency signal. The demodulator 26 demodulates the baseband frequency by removing the carrier from the down-converted signal.

As described above, the CDMA wireless communication apparatus of the prior art does not have a base station monitoring apparatus that measures the state (magnitude, phase difference, etc.) of the signal to be measured in the code domain and reports the state to the operator so that the operator can take action.

In other words, in a conventional wireless communication device such as FDMA or TDMA, there has been a monitoring device that is connected to an object under test and measures the magnitude and waveform of a signal in a frequency domain and reports the result to an operator. Since it is a resource of communication itself, no monitoring device is connected to the base station apparatus and measures the signal of the base station and reports it to the upper level.

On the other hand, as the number of subscribers increases in the wireless communication service, the number of base stations is increased in order to achieve better service. As the number of base stations increases, maintenance and operating costs increase. Therefore, there is a need for a technology for maintaining a base station to provide a high quality service by checking a radio frequency signal transmitted by a CDMA base station.

An object of the present invention is to provide a code region analysis unit for measuring the channel state of the code region through the transmission and reception signal of the CDMA base station to solve the problems of the prior art as described above, The present invention provides a code region analysis system of a CDMA base station that can remotely control the state of a base station through a channel measurement signal of the base station.

In order to achieve the above object, the present invention modulates a baseband signal of a CDMA, up-converts it, amplifies it, and outputs it as a transmission signal, and a baseband after receiving the low-noise amplification and down-converting the signal of the CDMA. A CDMA base station including a reception processing unit for demodulating a signal, comprising: a switching unit for sequentially switching a plurality of transmission signals or reception signals, and measuring a channel and a channel signal of a CDMA code region in the transmission signal or reception signal transmitted through the switching unit A code region analysis unit for analyzing the transceiving code state by performing the analysis, a code region analysis unit including a communication unit for transmitting an analysis result of the transceiving code state of the code region processing unit, a switching unit, a code region processing unit, and a control unit for controlling the communication unit, Receives analysis result of transmission / reception code status from domain analysis unit And monitoring the base station device using a transmission and reception state information of the station, and a base station control unit for controlling the transmission processing or reception processing by the base station monitor.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a diagram illustrating a base station monitoring apparatus using a code region analysis system of a CDMA base station according to the present invention.

2, a base station monitoring apparatus using a code region analysis system of a CDMA base station according to the present invention includes a CDMA base station 110 and a code domain analyzer 120 connected to the CDMA base station 110. And a base station monitoring apparatus 130, a base station controller 140, a network 150, a remote base station monitoring server 160, a database 170, and the like.

As described above, in the present invention, the code region analyzer 120 is connected to the CDMA base station 110 to measure the channel state of the transmit / receive code in the code region through the code region analyzer 120 and the operator directly measures the measurement result. It may be transmitted to the monitoring base station monitoring device 130, or may be sent to the base station monitoring server 160 in the remote place through the network 150. Then, the base station monitoring apparatus 130 or the base station monitoring server 160 receives the measurement result of the code area analyzer 120 as the transmission and reception status information of the CDMA base station 110 and documents it in the database 170. If the measured result indicates good transmission and reception state information of the CDMA base station 110, the base station 110 is operated as it is. However, if the measured result indicates the transmission and reception status information of the CDMA base station 110 is not good, the base station control unit 140 controls the transmission processing unit or the reception processing unit (Basetransceiver Station) of the CDMA base station 110 to the optimized base station state Maintain the best use of radio resources by maintaining or responding to network operations as appropriate. That is, the number of subscriber accesses and the speed of data access can be made more available.

3 is a diagram illustrating a code region analysis system of a CDMA base station according to an embodiment of the present invention. Referring to FIG. 3, the code region analysis system of the present invention includes an antenna 101, a base station 110 including a transmit processor and a receive processor of a signal transmitted and received through a filter 103; And a code region analyzer 120 connected to the base station 110 to receive a transmission signal or a reception signal, and measure a code channel state in the CDMA code region and output the result.

In the system of the present invention, the transmission processor includes a baseband frequency processor 113, a modulator 111, an up-converter 109, an amplifier 107, and a baseband frequency generator 113 for generating a baseband frequency. And one coupling portion 105. The reception processor includes a low noise amplifier (LNA) 119, a second combiner 118, a down converter 117, a demodulator 115, a baseband frequency processor 113, and the like. . Herein, the modulator 111, the baseband frequency processor 113, and the demodulator 115 may be configured as one digital modulator / demodulator 180. However, since the transmission processing unit and the reception processing unit are the same as in the prior art of FIG. 1, detailed operation processes thereof will be omitted.

The code region analysis system of the present invention configured as described above transmits a modulated signal from the baseband frequency processor 113 through the first combiner 105 to the base station 110 and the baseband frequency from the LNA 119. In the process of demodulating the received signal through the processing unit 113, the transmit signal Txn of the first combiner 105 of the transmission path or the receive signal Rxn of the second combiner 118 of the receive path is coded. The area analyzer 120 detects the activity of the code channel with respect to the transmission signal or the reception signal and transmits the measurement result to the base station monitoring apparatus 130 or the base station monitoring server 160 at a remote location.

4 is a diagram illustrating an internal configuration of the code region analysis system of FIG. 3. Referring to FIG. 4, in the system of the present invention, the code region analyzer 120 sequentially switches a plurality of transmission signals Tx1, Tx2, ... Txn or reception signals Rx1, Rx2, ... Rxn. 122, a code region processing unit 124 for analyzing a transmission / reception code state by measuring a channel and a channel signal of a CDMA code region from a transmission signal or a reception signal transmitted through the switching unit 122, and a code region processing unit 124 The communication unit 126 for transmitting the analysis result transmitted from the base station to the monitoring device, and the control unit 128 for controlling the switching unit 122, the code area processing unit 124 and the communication unit 126.

FIG. 5 is a diagram illustrating an example of the code region processor of FIG. 4. Referring to this, the code region processor 124 down-converts a transmission signal or a received signal transmitted through the switch 122. ), A demodulator 1243 that demodulates the signal of the downconversion unit 1241, a filter 1245 that filters the signal of the demodulator 1243, and a descramble that descrambles the signal of the filter 1245. Outputs the signal from the ring unit 1247, the active channel ID despreader 1248 and the active channel ID despreader 1248 to despread the signal of the descrambler 1247 for each active channel ID as an analysis result. And an output unit 1249. At this time, the control unit 128 also controls the components of the code area processing unit 124 in synchronization with the clock signal of the base station system to be monitored.

4 and 5, the code region analyzer of the present invention operates as follows.

First, the switching unit 122 switches to sequentially input at least one or more transmission signals Tx1, Tx2, ... Txn and the reception signals Rx1, Rx2, ... Rxn to sequentially transmit the code area processing unit 124 one by one. Or transmits a received signal. The code region processor 124 then down-converts the signal to an appropriate frequency (intermediate frequency or baseband frequency) through the down-conversion unit 1241.

The demodulator 1243 demodulates the signal of the downconverter 1241 according to a transmission signal modulation method such as quadrature phase shift keying (QPSK) or binary phase shift keying (BPSK). The filter 1245 filters the signal of the demodulator 1243 and sends the filtered signal to the descrambler 1247. The descrambler 1247 descrambles the filtered signal, and the active channel ID despreader 1248 despreads the descrambled signal for each active channel ID to output the magnitude of the signal for each code. do.

The output unit 1249 transmits the magnitude of the signal for each code transmitted from the active channel ID despreader 1248 from the communication unit 126 to the base station monitoring apparatus 130 or connects to the network 150 to connect with the outside. It forwards to the base station monitoring server 160.

Then, the size of the channel and channel signal for each code area output from the output unit 1249, the base station monitoring device 130 or the base station appraisal server 160 in the remote area analyzes the code state of the transmission and reception channel to properly maintain the wireless network. In order to make the best use of radio resources, it is possible to maintain and optimize base stations and networks.

As described above, the present invention further includes a code region analyzer for measuring a channel state of a code region through a transmit / receive signal at a transmitting and receiving end of a CDMA base station, thereby receiving a channel measurement signal of a code region of a transmit / receive signal measured by the code region analyzer. By monitoring and monitoring the status of the base station through the code area to observe the transmission and reception status of the base station that can be remotely controlled, the operator obtains more information, it can be applied for efficient and optimized operation for the entire wireless network.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

1 is a block diagram showing a transceiver of a CDMA base station according to the prior art;

2 is a diagram illustrating a base station monitoring apparatus using a code region analysis system of a CDMA base station according to the present invention;

3 is a diagram illustrating a code region analysis system of a CDMA base station according to an embodiment of the present invention;

4 is an internal configuration diagram of a code region analysis system of FIG. 3;

5 is a configuration diagram illustrating an example of a code region processing unit of FIG. 4.

<Description of the code | symbol about the principal part of drawing>

110: base station 120: code region analysis unit

130: base station monitoring device 140: base station control unit

150: network 160: remote base station monitoring server

170: database

Claims (6)

delete delete A transmission processor that modulates the baseband signal of the CDMA, up-converts it, amplifies it, and outputs it as a transmission signal, and a reception processor that receives the low-noise amplification signal of the CDMA signal and demodulates the baseband signal after demodulating it into a baseband signal. In a CDMA base station, A switching unit for sequentially switching a plurality of transmission signals or reception signals, a code region processing unit for analyzing a transmission / reception code state by measuring a channel and a channel signal of the CDMA code region from the transmission signal or reception signal transmitted through the switching unit; A code region analyzing unit including a communication unit which transmits an analysis result of a transceiving code state of the code region processing unit, a control unit which controls the switching unit, the code region processing unit, and the communication unit; A base station monitoring apparatus receiving the analysis result of the transmission / reception code state from the code region analyzer and using the transmission / reception state information of the base station; A base station control unit controlling the transmission processing unit or the reception processing unit by the base station monitoring apparatus Code region analysis system of a CDMA base station, comprising: a.  4. The apparatus of claim 3, wherein the code region processor is configured to down-convert a transmission signal or a received signal transmitted through the switching unit, a demodulator to demodulate a signal of the down-converter, and descramble the signal of the demodulator. And an active channel ID despreader for despreading the signal of the descrambler for each active channel ID, and an output unit for outputting a signal of the active channel ID despreader as an analysis result. Code region analysis system of a CDMA base station.  5. The code region analysis system of claim 4, wherein the code region processor further comprises a filter for filtering the demodulator signal and sending the filtered signal to the descrambler.  4. The code region analysis system of claim 3, wherein the controller operates in synchronization with a clock signal of a base station system to be monitored.