KR20010011498A - Examine Method for BTS's performance in mobile communication system - Google Patents

Abstract

PURPOSE: A method for testing the performance of a base station in a mobile communication system, is provided to have directional couplers for couple signals in each sub block of the base station, and to additionally install ports to a radio frequency(RF) transmission path and an RF receiving path. CONSTITUTION: A call is set to an optional sub block located on a radio frequency(RF) transmission/receiving path of a base station. A signal is coupled from the set sub block setting the call, and transmitted to a base station test unit(BTU). The BTU analyzes the coupled signal, to measure whether the sub block setting the call has an error. A coupling operation is performed through ports added to the sub block, by using a directional coupler. If more than one call is set, signals coupled from each sub block are mutually isolated and transmitted to the BTU.

Description

{Examine Method for BTS's performance in mobile communication system}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station of a mobile communication system, and more particularly, to a base station performance test method of a mobile communication system suitable for measuring performance of each sub block of a base station using an improved base station performance test apparatus. It is about.

In general, in a mobile communication system based on code division multiple access (CDMA), a base station test unit (hereinafter, abbreviated as BTU) is used to diagnose normal operation of a base station and call quality. Various tests are performed, and the performance of the base station is measured accordingly.

The performance test method of the conventional base station is described with reference to FIG.

In order to test the performance of the base station, the BTU 104 is connected to the RF transmission path and the RF reception path, respectively, to couple the transmission / reception signals.

That is, a directional coupler 103 is coupled between the antenna of the RF transmission path and the front-end filter 102 to couple a transmission signal, and the antenna and the front-end filter 107 of the RF reception path are similarly coupled. The directional coupler 108 is coupled between them to couple the received signal.

The signal coupled from each RF transmit path and RF receive path is input to a mobile simulator (not shown) of the BTU 104 and the mobile simulator is input to each coupled input from the directional coupler 103, 108. Through the signal level analysis, we measure the performance of the base station antenna, measure the call quality at the end of the base station, and whether the base station malfunctions.

At this time, the BTU 104 uses a mobile simulator provided therein to set up a call on a wired line with a base station, and the call setup is a directional coupler 103 or 108 between the antenna and the front-end filter 102 and 107. Is implemented using a port.

In addition, the mobile simulator is designed to transmit / receive a signal having a desired level from a path of a desired base station through a path selection function and a pathloss variable function of the BTU 104 itself.

However, in the conventional base station performance measurement method, although the directional coupler is coupled between the antenna and the front-end filter on the RF transmission path and the RF reception path to couple the signal, the base station performance test can be performed. It is not possible to test the performance and call quality in each subblock.

Considering the case where a failure occurs in the base station RF system, the conventional base station performance measurement method has a problem that can not be operated stably because the base station can not know the specific cause of the failure of the RF system.

In addition, there is a problem that the operating cost of the entire base station can be increased because it can not take a quick repair when the failure of the base station.

Accordingly, an object of the present invention has been made in view of the above-described problems of the prior art, and provides a performance test method of a base station in a mobile communication system capable of testing performance for each sub block in an RF system of the base station. will be.

According to an aspect of the present invention for achieving the above object, the performance test method of a base station in a mobile communication system in the base station performance test method for measuring whether or not the abnormal operation of the base station using a base station performance measurement apparatus, Setting up a call to any sub-block located on an RF transmission / reception path of a signal, coupling a signal from the sub-block to which the call is set, and transmitting the signal to the base station measuring device; And analyzing whether the abnormal operation of the sub-block in which the call is set is performed by analyzing the received signal.

Preferably, the coupling is performed through a port added to the sub block by using a directional coupler, and when the call is set to at least one signal coupled from each sub block is isolated from each other to the base station measuring device Is sent.

1 is a view for explaining a performance test method of a base station in a conventional mobile communication system.

2 is a view for explaining a performance test method of a base station in a mobile communication system according to the present invention.

Figure 3 is a block diagram showing a base station performance test apparatus according to the present invention.

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

200: Port 1 201: Port 2

202: Port 3 203: Port 4

205: Port 5 206: Port 6

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention provides a performance test method of a base station capable of measuring the abnormal operation for each sub-block in the base station RF system. To this end, each sub-block of the base station is provided with a directional coupler for coupling the signal, so that a plurality of ports are additionally set in the RF transmission path and the RF reception path.

In addition, the BTU further includes a path selection switch (SP4T switch) for processing a signal coupled from a port added for each sub block.

2 is a view for explaining a performance measurement method of a base station in a mobile communication system according to the present invention.

Referring to FIG. 2, performance measurement of sub-blocks for the RF transmission path and the RF reception path of the base station is performed for each path.

First, a base station performance measurement method for an RF transmission path will be described.

First, the transmission signal is coupled between the up converter and the high power amplifier (HPA) of the RF transmission path using a directional coupler, and the transmission signal is coupled between the large power amplifier and the front-end filter using the directional coupler. do. Then, the transmission signal is coupled between the front-end filter and the antenna in the same manner as the conventional method.

Thus, in order to couple the transmission signal for each subblock of the RF transmission path, between the up converter and the high power amplifier, and between the high power amplifier and the front-end filter, port 1 (Port 1) 200 and port 2 (201). Are added respectively.

Then, the signal coupled from each sub block of the RF transmission path is input to a movement simulator (not shown) in the BTU to test whether or not an abnormal operation of each sub block located on the RF transmission path is performed.

Meanwhile, a method of measuring the performance of the RF reception path is as follows.

Receiving the coupled signal from each subblock of the RF transmission path, the BTU transmits the received signal to each subblock of the corresponding RF reception path that matches the RF transmission path.

That is, the BTU couples and transmits a transmission signal between the up converter and the high power amplifier of the RF transmission path, and transmits the received signal to the input terminal of the down converter of the RF reception path. In a similar manner, the transmission signal is coupled between the high power amplifier and the front-end filter of the RF transmission path, and the received signal is transmitted to the input terminal of the low noise amplifier of the RF reception path. In addition, performance measurement of the front-end filter stage of the RF reception path is performed according to the same method as in the related art.

As such, port 4 203 is added between the down converter and the low power amplifier and port 5 204 is added between the low power amplifier and the front-end filter to couple the received signal to each sub block of the RF receive path. .

Therefore, port 1 (200), port 2 (201) of the RF transmission path, port 4 (203), and port 5 (204) of the RF reception path may be considered as pairs with each other for the RF transmission and RF reception paths. Each path is isolated using a switch or filter with good isolation so that performance is not affected by each other.

The following describes in more detail the performance measurement method for the RF transmit path and the RF receive path configured as described.

First, in order to measure the performance of each sub-block of the base station, the call setup path between the base station and the mobile simulator in the BTU is set to the up converter output terminal of the RF transmission path and the down converter input terminal of the RF reception path, and the signal received through the remaining paths. Shut off using switches or filters with good isolation.

Subsequently, the BTU analyzes a signal transmitted / received through a call established between the port 1 200 of the RF transmission path and the port 4 203 of the RF reception path and analyzes a signal of the base station subblock from the up converter to the down converter. Test for abnormal operation.

Then, a call is established between the output of the high power amplifier of the RF transmission path and the input of the low noise amplifier of the RF receiving path, and the signal received through the remaining path is blocked using a switch or a filter having excellent isolation specificity.

Subsequently, the BTU analyzes signals coupled and transmitted / received through a call established between port 2 201 of the RF transmission path and port 5 204 of the RF reception path, thereby analyzing a base station subblock from the high power amplifier to the low noise amplifier. Is tested for abnormal operation.

At this time, the performance measurement results of the base station sub-blocks through the port 2 201 and the port 5 204 are compared with the performance measurement results of the base station sub-blocks previously measured through the port 1 200 and the port 4 203. It is only used as a performance diagnosis result of the high power amplifier located on the RF transmit path of port 2 201 and the low noise amplifier located on the RF receive path of port 5 204.

On the other hand, performance measurement between the front-end filter stage and the antenna located at the end of the base station is performed in the same manner as in the prior art.

In this case, a signal or a switch having excellent isolation may be used to block all signals other than the signals coupled through the port 3 202 and the port 6 205.

In addition, the base station performance measurement results through the port 3 202 and the port 6 205 are compared to the performance measurement results of the base station subblocks through the previous port 2 201 and the port 5 204. It should be used only as a result of measuring the performance of the subblock of.

As described above, in the present invention, in order to measure performance for each subblock, a call is set for each subblock of the RF transmission path and the RF reception path, and accordingly, a plurality of coupling signals from ports additionally provided for each subblock. Is received, a path selection switch is added to the BTU to handle multiple signals coupled on each path.

This BTU is shown in FIG. 3.

Referring to FIG. 3, the BTU may include a path selection switch 1 (path selection switch 1) for setting a path of a signal additionally coupled and received from port 1, port 2, port 4, and port 5 in addition to the signal coupled from port 3 and port 6. 300 and path selection switch 2 301 are added.

As described above, the operation of the BTU to which the path selection switches 300 and 301 are added is as follows.

First, path select switch 1 300 is set to receive a signal coupled from port 1, and path select switch 2 301 is set to transmit a signal to port 4.

Then, the BTU analyzes the signals transmitted and received from each port (port 1, port 4) to measure the performance of the base station sub-blocks up to the up converter and down converter.

Then, the path selection switch 1 is set to receive a signal coupled from the port 2, and the path selection switch 2 301 is set to transmit a signal to the port 5.

Then, the BTU analyzes the signals transmitted and received from each port (port 2, port 5) to measure the performance of the base station subblocks up to the large power amplifier and the low noise amplifier.

As described in the above description, the performance can be measured for each subblock of the base station using the improved base station performance measurement apparatus, so that an accurate error detection can be performed for each subblock during abnormal operation of the base station.

In addition, the operation and maintenance time of the base station is low, there is an effect that can provide a stable communication service to the subscriber.

Claims (3)

In the base station performance test method for measuring the abnormal operation of the base station using the base station performance tester, Setting up a call to any sub-block located on an RF transmission / reception path of the base station; Coupling a signal from the sub-block to which the call is set and transmitting the signal to the base station measuring apparatus; And analyzing, by the base station measuring device, the coupled signal to measure whether or not an abnormal operation of the sub block in which the call is set is performed. The method of claim 1, wherein in the coupling step, The coupling is performed through a port added to the sub block using a directional coupler (Directional Coupler) characterized in that the performance test method of the base station in a mobile communication system. 2. The method of claim 1, wherein the signals coupled from each sub-block are transmitted to the base station measurement apparatus in isolation when the call is set up.