KR20120054841A - Method of radio frequency test for wireless communication device - Google Patents

Method of radio frequency test for wireless communication device Download PDF

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Publication number
KR20120054841A
KR20120054841A KR1020100116170A KR20100116170A KR20120054841A KR 20120054841 A KR20120054841 A KR 20120054841A KR 1020100116170 A KR1020100116170 A KR 1020100116170A KR 20100116170 A KR20100116170 A KR 20100116170A KR 20120054841 A KR20120054841 A KR 20120054841A
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South Korea
Prior art keywords
wireless communication
communication device
test
packet
performance
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KR1020100116170A
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Korean (ko)
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김석경
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삼성전기주식회사
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Publication of KR20120054841A publication Critical patent/KR20120054841A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
    • H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/29—Performance testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: A wireless frequency test method of a wireless communication apparatus is provided to measure RF(Radio Frequency) performance of wireless communication apparatuses through Rx communication channel and Tx communication channels. CONSTITUTION: A measurement apparatus downloads firmware from a computer(S1). The measurement apparatus establishes a vector signal creation apparatus in order to transmit reception test packets(S2). The measurement apparatus tests the Rx performance of a wireless communication apparatus. The measurement apparatus controls a vector signal analysis apparatus in order to transmit the transmission test packets(S4). The vector signal analysis apparatus tests the Tx performance of the wireless communication apparatus by analyzing the test packets(S5).

Description

METHOOD OF RADIO FREQUENCY TEST FOR WIRELESS COMMUNICATION DEVICE}

The present invention relates to a radio frequency (RADIO FREQUENCY: RF) test method of a wireless communication device, and more particularly through the radio frequency (RF) performance of a plurality of wireless communication devices through a separate Rx communication channel and Tx communication channel It relates to an RF test method of a wireless communication device to measure.

RF characteristics of wireless communication devices such as wireless LAN cards, that is, the performance of the transmit frequency (Transmit Frequency: Tx) (Error Vector Magnitude: EVM) and the receive frequency (Receive Frequensy: Rx) (Packet Error Rate: PER) In order to measure, the radio frequency performance of the wireless communication device is directly connected to a measuring instrument that tests the performance of the frequency.

1 is an overall configuration diagram showing a test apparatus used in the RF test method of a wireless communication device according to the prior art.

Referring to FIG. 1, a test apparatus 10 used in an RF test method of a wireless communication device according to the related art is a measuring device 12 and a wireless communication device connected to one end of the measuring device 12. 13 and a computer 11 connected to the other end of the measuring instrument.

The computer 11 serves to transmit a control signal to control the instrument 12, the instrument 12 transmits a plurality of radio frequency signals and receives radio frequency signals from each radio communication device, It analyzes the received signal and measures the RF performance of the wireless communication device.

However, such a test device 10 is provided with only one port (Port) on the measuring instrument has a problem that the time required for the test is delayed when testing a plurality of wireless communication devices.

In addition, even if a plurality of wireless communication devices are connected to the measuring device through a divider presented in the prior document (Publication No. KR 2010-0037909), the frequency performance of the wireless communication device is measured. It is only connected to a wireless communication device, and still testing the frequency performance of a plurality of wireless communication devices through one communication channel, which in turn only reduces the time required for the connection process between the instrument and the wireless communication device. Since it does not have an effect of shortening the time for measuring the performance of the radio frequency itself, the time required for testing may also be delayed as the number of wireless communication devices increases.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, and provides an RF test method for a wireless communication device that separates an Rx communication channel and a Tx communication channel and tests the RF performance of the wireless communication device through the same. It is a technical problem.

In order to achieve the above object, according to an embodiment of the present invention, the radio frequency performance of a plurality of wireless communication devices using a test device including a measuring instrument, a distributor connected to one end of the measuring instrument, a computer connected to the other end of the measuring instrument A method of testing a method comprising: (a) separating a Tx communication channel and an Rx communication channel at the instrument; (b) the instrument transmitting a received test packet to the wireless communication device through the separated Rx communication channel; And (c) transmitting, by the wireless communication device, the transmission test packet to the meter through the separated Tx communication channel.

The present invention also provides an RF test method for a wireless communication device, wherein the other wireless communication device performs step (b) while the measuring device performs step (c) for one wireless communication device. .

In addition, the step (b) provides an RF test method of a wireless communication device, characterized in that made by the vector signal generator included in the measuring instrument.

In addition, the step (c) provides an RF test method of a wireless communication device, characterized in that made by the vector signal analyzer included in the measuring instrument.

According to the RF test method of the wireless communication device according to the present invention, it is possible to measure the RF performance of the plurality of wireless communication devices through the separate Rx communication channel and Tx communication channel at the same time, which is required for the RF performance test of the wireless communication device The time can be shortened, thereby improving the production efficiency of the product.

1 is an overall configuration diagram showing a test apparatus used in the RF test method of a wireless communication device according to the prior art.
2 is an overall configuration diagram showing a test apparatus used in the RF test method of the wireless communication device according to an embodiment of the present invention.
3 is a flowchart illustrating an RF test method of a wireless communication device according to an embodiment of the present invention.
4 is a system diagram illustrating an RF test method of a wireless communication device through a separate communication channel.
Figure 5 is a graph showing the time required by the RF test method of the wireless communication device according to an embodiment of the present invention.
6 is a graph comparing the time required by the RF test method of the wireless communication device according to the prior art and the time required by the RF test method of the wireless communication device according to the present invention.

Hereinafter, the present invention will be described in detail with reference to embodiments of the present invention shown in the accompanying drawings. However, the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.

2 is an overall configuration diagram illustrating a test apparatus used in an RF test method of a wireless communication device according to an exemplary embodiment of the present invention.

Referring to FIG. 2, a test apparatus 100 used in an RF test method of a wireless communication device according to an embodiment of the present invention is a computer connected to one end of the measuring instrument 120 through a measuring instrument 120 and a LAN cable. 110, a plurality of distributors 130 connected to the other end of the measuring instrument 120 and the plurality of distributors 130 and communicating with the measuring instrument 120 through an RF cable (eg, 50 Ω coaxial cable). The wireless communication device 140 may be configured.

The computer 110 is installed with a firmware (FrmW: F / W) for testing the RF performance of the wireless communication device, if the instrument downloads the firmware (F / W) from the computer for the RF test of the wireless communication device The driving environment is loaded, and finally, the computer 110 measures the radio frequency performance of the wireless communication device by transmitting a control signal for controlling the instrument 120 and the wireless communication device 140. can do.

In addition, the measurement instrument 120 transmits a reception test packet to a plurality of wireless communication devices 140 according to a control signal transmitted from the computer 110, and transmits a test test packet transmitted from the plurality of wireless communication devices 140. Analyze this to measure the radio frequency performance of the wireless communication device.

The instrument 120 may include a vector signal generator (VSG) capable of transmitting radio frequency signals and a vector signal analyzer (VSA) capable of receiving and analyzing radio frequency signals. Can be.

3 is a flowchart illustrating an RF test method of a wireless communication device according to an embodiment of the present invention.

First, the instrument 120 downloads the firmware (F / W) from the computer 110 and loads a driving environment for testing the RF performance of the wireless communication device (step S1).

When the driving environment for the RF test is loaded, the computer 110 may transmit a control signal for controlling the instrument 120 and the wireless communication device 140 through this.

Next, in order to measure a receive frequency (Rx) performance of a wireless communication device (Packet Error Rate: PER), the measuring unit 120 sets the wireless communication device 140 in a reception standby mode. Is transmitted to the wireless communication device 140, and a vector signal generator (VSG) is set to transmit a received test packet (S2 step).

When the setting is completed, the vector signal generator VSG transmits a received test packet to the wireless communication device, where the received test packet is an entry packet indicating a start point of a test and an end of a test. An end packet may include an end packet and a plurality of test packets, and the test packet may include a header packet and a data packet including a sequence number and reception level information of the packet.

When the entry packet is transmitted at a level at which reception is guaranteed, a plurality of test packets are transmitted, wherein the plurality of test packets are transmitted while the reception level is adjusted to measure the reception sensitivity of the wireless communication device. Subsequently, when the wireless communication device receives the test packet, the content of the received packet is retransmitted as it is, and when it is not received, the Rx performance of the wireless communication device is tested by transmitting the sequence number of the unreceived packet (S3). step).

Next, in order to measure the transmit frequency (Tx) performance (Error Vector Magnitude (EVM)) of the wireless communication device, the measuring unit 120 is a wireless communication device for transmitting a random transmission test packet (Test Packet) The control signal to be transmitted is transmitted to the wireless communication device 140, and the vector signal analyzer (VSA) is set to receive the transmission test packet (step S4).

When the setting is completed, the wireless communication device 140 transmits a transmission test packet. The transmission test packet, like the reception test packet, includes an entry packet indicating a start point of a test, and An end packet and a plurality of test packets indicating a finish may be configured, and the test packet is composed of a header packet and a data packet.

When the wireless communication device 140 transmits an entry packet at a level that is guaranteed to be transmitted, a test packet for a Tx test is transmitted to the vector signal analyzer VSG, and the vector signal analyzer VSG analyzes the received packet to wirelessly. The Tx performance of the communication device is tested (step S5), and then the RF test of the wireless communication device is terminated.

Here, the instrument 120 may separate and transmit a reception test packet transmission channel (hereinafter referred to as Rx communication channel) for determining Rx performance and a transmission test packet transmission channel (hereinafter referred to as Tx communication channel) for determining Tx performance. have.

4 is a system diagram illustrating an RF test method of a wireless communication device through a separate communication channel.

In FIG. 4, the horizontal axis represents time and the vertical axis represents a channel band, and the channel is divided into an Rx communication channel (Channel A) and a Tx communication channel (Channel B).

When the instrument 120 downloads the firmware (F / W) from the computer 110 and finishes loading for the RF test driving environment of the wireless communication device, one wireless communication device 141 is Channel A. After receiving the received test packet generated in the vector signal generator (VSA) through, and transmits the transmission test packet to the vector signal analyzer (VSA) via Channel B in accordance with the control signal of the instrument 120.

Here, while the one wireless communication device 141 transmits the transmission test packet through Channel B, the other wireless communication device 142 receives the test signal generated by the vector signal generator VSG through Channel A. Receive a packet. Likewise, while the other radio communication device 142 transmits the transmission test packet to the vector signal analyzer (VSA) through Channel B, another radio communication device 143 transmits the vector signal through Channel A. The reception test packet generated by the generator VSG is received.

In this manner, while one wireless communication device transmits a transmission test packet to the vector signal analyzer (VSA) through Channel B, the other wireless communication device receives a test packet from the vector signal generator (VSG) through Channel A. When receiving the, the time (T total ) required for the RF test of the n wireless communication device consisting of the following equation (1).

Figure pat00001

Here, T loading is a time required for the instrument 120 to download firmware (F / W) from the computer 110 and finish loading for the RF test driving environment of the wireless communication device. The measure is the time required to measure the radio frequency performance of one radio communication device after loading is completed. The time when the radio communication device receives the Rx test packet from the vector signal generator (VSG) and tests the Rx performance. This is the sum of the times when the signal analyzer (VSA) receives the transmission test packet from the wireless communication device and tests the Tx performance.

That is, as shown in Equation 1, while one wireless communication device transmits a transmission test packet to the vector signal analyzer (VSA) through Channel B, the other wireless communication device transmits a vector signal through Channel A. By receiving the reception test packet from the generator VSG, it can be seen that the time T measure required to measure radio frequency performance of one radio communication device is cut in half.

5 is a graph showing the time required by the RF test method of a wireless communication device according to the present invention. T loading and T measure are assumed to be 5 seconds, and the horizontal axis represents the number of radio communication devices (n) and the vertical axis represents the time (T total ) required for the RF test of the radio communication device consisting of n devices.

As shown in Figure 5, when testing the RF performance of the wireless communication device according to the present invention, the time required for the test is 10 seconds when one wireless communication device, 12.5 seconds when two wireless communication devices, wireless communication If there are three devices, it is 15 seconds. That is, it can be seen that as the number n of wireless communication devices increases, the time T total required for the test increases in proportion to the value of T measure / 2.

On the other hand, when testing the RF performance of the wireless communication device according to the prior art, the time (T total ) required for the RF test of the wireless communication device consisting of n pieces is expressed by Equation 2 below.

Figure pat00002

That is, it can be seen that the time (T tatal ) required by the RF test method of the wireless communication device according to the related art increases in proportion to the value of (T loading + T measure ) as the number n of the wireless communication devices increases. have.

6 is a graph comparing the time required by the RF test method of the wireless communication device according to the prior art and the time required by the RF test method of the wireless communication device according to the present invention. T loading and T measure are assumed to be 5 seconds, and the horizontal axis represents the number of radio communication devices (n) and the vertical axis represents the time (T total ) required for the RF test of the radio communication device consisting of n devices.

Referring to FIG. 6, the time required for the test when the number of wireless communication devices is one is the same as that of the prior art or the case of the present invention. However, when the number of wireless communication devices is two, it takes 20 seconds and 12.5 seconds, respectively, and when the number of wireless communication devices is three, it takes 30 seconds and 15 seconds, respectively. That is, it can be seen that as the number n of wireless communication devices to be tested increases, the effect improved by the present invention also increases.

The present invention is not limited by the above-described embodiment and the accompanying drawings, but is intended to be limited by the appended claims, and various forms of substitution, modification and It will be apparent to those skilled in the art that changes are possible.

10, 100: test device
11, 110: Computer
12, 120: Instrument
130: measuring instrument
13, 140, 141, 142, 143, 14n: Wireless communication device

Claims (4)

In the method of testing the radio frequency performance of a plurality of wireless communication devices using a test device including a measuring instrument, a splitter connected to one end of the measuring instrument, a computer connected to the other end of the measuring instrument,
(a) separating a Tx communication channel and an Rx communication channel in the instrument;
(b) the instrument transmitting a received test packet to the wireless communication device through the separated Rx communication channel; And
(c) the wireless communication device transmitting a transmission test packet to the meter through the separated Tx communication channel;
RF test method of a wireless communication device comprising a.
The method of claim 1,
And the other wireless communication device proceeds to step (b) while the measuring device proceeds to step (c) for one wireless communication device.
The method of claim 1,
The step (b) is the RF test method of the wireless communication device, characterized in that made by the vector signal generator included in the measuring instrument.
The method of claim 1,
The step (c) is the RF test method of the wireless communication device, characterized in that made by the vector signal analyzer included in the measuring instrument.
KR1020100116170A 2010-11-22 2010-11-22 Method of radio frequency test for wireless communication device KR20120054841A (en)

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