GB2476379A - Measuring a radio wave reception environment using RSSI values - Google Patents

Measuring a radio wave reception environment using RSSI values Download PDF

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Publication number
GB2476379A
GB2476379A GB1021276A GB201021276A GB2476379A GB 2476379 A GB2476379 A GB 2476379A GB 1021276 A GB1021276 A GB 1021276A GB 201021276 A GB201021276 A GB 201021276A GB 2476379 A GB2476379 A GB 2476379A
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GB
United Kingdom
Prior art keywords
rssi
test
test signal
radio wave
wave reception
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1021276A
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GB201021276D0 (en
Inventor
Ju Hyung Kim
Chang Soo Lim
Hak Sun Kim
Hyun Hak Kim
Jeong Sik Seo
Jae Chan Lee
Song On Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electro Mechanics Co Ltd
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Samsung Electro Mechanics Co Ltd
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Filing date
Publication date
Application filed by Samsung Electro Mechanics Co Ltd filed Critical Samsung Electro Mechanics Co Ltd
Publication of GB201021276D0 publication Critical patent/GB201021276D0/en
Publication of GB2476379A publication Critical patent/GB2476379A/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/06—Testing, supervising or monitoring using simulated traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/10—Radiation diagrams of antennas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H04W16/20—Network planning tools for indoor coverage or short range network deployment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04B17/0057—
    • 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
    • H04B17/318—Received signal strength

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

Abstract

A system for measuring a radio wave reception environment includes a test signal transmission unit 11 for transmitting a test signal having a predetermined power to a field "F" in which radio reception is to be measured, one or more test modules 12 disposed in the measurement field, each test module receiving the test signal and transmitting a received signal strength indicator (RSSI), an RSSI reception unit 13 for receiving the RSSIs, and a data analysis unit 14 for analyzing the RSSIs and determining the radio environment for the measurement field. The invention is able to measure an indoor radio reception environment without the drawbacks associated with a spectrum or network analyzer. The test signal transmission unit, test module and RSSI reception unit may communicate through wireless LAN (WLAN), Bluetooth (RTM) or ZigBee. The test module(s) may be installed in the same ground condition as a wireless transmitter/receiver of a communication network which is to be applied to the measurement field.

Description

SYSTEM AND METHOD FOR MEASURING RADIO WAVE RECEPTION
ENVIRONMENT
CROSS-REFERENCE TO RELATED APPLICATIONS
(0001] This application claims the priority of Korean Patent Application No. 10-2009-0125651 filed on December 16, 2009, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
Field of the Invention
(0002] The present invention relates to a system and method for measuring a radio wave reception environment, and more particularly, to a system and method for measuring a radio wave reception environment, which is capable of solving a problem of a system and method for measuring a radio wave reception environment using a spectrum analyzer or network analyzer, in which an error occurs due to an effect of other communication signals in similar frequency bands or a cable provided in analysis equipment.
Description of the Related Art
(0003] A radio wave reception environment is one of several important factors which determine a communication quality in a variety of wireless communication systems. Therefore, Page 1 measuring a radio wave reception environment with precision is a basic and essential requirement for providing a communication service having an excellent quality.
(0004] Typically, a method for measuring a radio wave reception environment is applied in various manners depending on the condition of the radio wave reception environment or the like.
A mobile communication system such as a general cellular phone adopts a method in which while the mobile communication system is moved by a vehicle for measuring a radio wave reception environment, a received signal strength indicator (RSSI) is measured to create a radio wave reception environment map. Such a method is used for measuring a wide range of outdoor radio wave reception environments, and cannot be applied to the measurement of a radio wave reception environment of a wireless network configured within a room.
(0005] In general, a method using a spectrum analyzer or a network analyzer is used as a method for measuring an indoor radio wave reception environment.
(0006] The method using a spectrum analyzer may be used to measure a radio wave reception environment with precision, using the measurement know-how of each measurer. However, when signals in similar frequency bands to that of a frequency band being measured in a reception environment are mixed in a space in which the reception environment is to be measured, it may have an effect upon the spectrum analyzer, making it impossible Page 2 to measure the reception environment with precision. In particular, since signals according to various communication schemes such as wireless LAN, Bluetooth, and ZigBee may be mixed in the 2.4 GHz band, one of the industrial, scientific, and medical (ISM) bands, the measurement precision of the spectrum analyzer may decrease.
(0007] In the method using a network analyzer, a reception antenna is installed at a position in which a reception environment is to be measured, and power for measurement is transmitted through a transmission antenna. Then, the reception antenna receiving the transmitted power measures reception power to calculate a loss. In the method using a network analyzer, however, the reception antenna, the transmission antenna, and the network analyzer should be connected via a cable. Therefore, a data error may occur due to an effect of the cable. Furthermore, the measurement should be performed while the cable or the heavy network analyzer is moved to positions in which a reception environment is to be measured. Therefore, it is not easy to measure a reception environment for various positions in a room.
[0008] In particular, the measurement method using a spectrum analyzer or a network analyzer uses a separate external antenna for measuring a reception environment. However, a monopole antenna used in a general cellular phone or electronic price tag has a feature in which a surface current is induced toward Page 3 a ground direction. Therefore, the size of a ground plane has an effect upon a bandwidth or radiation pattern. Consequently, since a very large electromagnetic feature difference exists between the antenna used in the measurement method using a spectrum analyzer or a network analyzer and an antenna applied to a system which is to be actually applied, a large difference may exist between the radio wave reception environment measured by the measurement method using a spectrum analyzer or a network analyzer and a radio wave reception environment of the communication system which is actually applied.
SUARY OF THE INVENTION
(0009] An aspect of the present invention provides a system and method for measuring a radio wave reception environment, which is capable of excluding an effect caused by other communication signals having similar frequency bands or a cable provided in analysis equipment.
[0010] According to an aspect of the present invention, there is provided a system for measuring a radio wave reception environment, including: a test signal transmission unit transmitting a test signal having a predetermined power to a field in which a radio wave reception environment is to be measured; at least one or more test modules disposed within the measurement field, receiving the test signal transmitted from the test signal transmission unit, and calculating and Page 4 transmitting a received signal strength indicator (RSSI) of the received test signal; an RSSI reception unit receiving the RSSI transmitted from the test module; and a data analysis unit analyzing the RSSI received by the RSSI reception unit and deciding the radio wave environment for the measurement field.
(0011] The test signal transmission unit, the test module, and the RSSI reception unit may communicate through wireless LAN, Bluetooth, or ZigBee.
(0012] The test module may be installed in the same ground condition as a wireless transmitter/receiver of a communication network which is to be applied to the measurement field.
(0013] According to another aspect of the present invention, there is provided a method for measuring a radio wave reception environment, including: installing a test module in a field in which a radio wave reception environment is to be measured; transmitting a test signal having a predetermined power to the measurement field; receiving, at the test module, the test signal transmitted from the test transmission unit, and calculating and transmitting an RSSI of the received test signal; receiving the RSSI transmitted from the test module; and analyzing the received RSSI to decide the radio wave
reception environment for the measurement field.
(0014] The transmission and reception of the test signal and the RSSI may be performed through wireless LAN, Bluetooth, or ZigBee.
Page 5 (0015] In the installing of the test module, the test module may be installed in the same ground condition as a wireless transmitter/receiver of a communication network which is to be
applied to the measurement field.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. lisa configuration diagram of a system for measuring a radio wave reception environment according to an embodiment of the present invention; FIG. 2 is a flow chat showing a method for measuring a radio wave reception environment according to another embodiment of the present invention; and FIG. 3 shows an example of a radio wave reception environment analysis graph of the system for measuring a radio wave reception environment according to the embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0017] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The invention may, however, be embodied in many Page 6 different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Like reference numerals in the drawings denote like elements, and thus their
description will be omitted.
(0018] FIG. 1 is a configuration diagram of a system for measuring a radio wave reception environment according to an embodiment of the present invention. Referring to FIG. 1, the system for measuring a radio wave reception environment using a wireless communication scheme according to the embodiment of the present invention may include a test signal transmission unit 11, a plurality of test modules 12, a received signal strength indicator (RSSI) reception unit 13, anda data analysis unit 14.
(0019] The test signal transmission unit 11 transmits a test signal having a predetermined power to a field F in which a radio wave reception environment is to be measured, using a preset wireless communication scheme. The test signal transmitted from the test signal transmission unit 11 may have the form of a data frame defined in the preset wireless communication scheme.
The test signal transmission unit 11 may be implemented as a transmission-dedicated communication device which does not Page 7 have a function of receiving a data frame.
[0020] The plurality of test modules 12 are disposed at positions at which radio waves are to be actually received within the measurement field, and respectively receive the test signal transmitted from the test signal transmission unit 11.
Each of the test modules 12 may be implemented in the form of a module including an antenna and a communication chipset for the preset wireless communication scheme, which is capable of communicating with the test signal transmission unit 11.
(0021] The test modules 12 may be installed in the same ground condition as a wireless transmitter/receiver of a communication network which is to be actually applied to the measurement field.
For example, when a communication network for electronic price tags installed in a large-scale store is the communication network which is to be actually applied, the test modules 12 may be installed in the same ground condition as communication modules of the electronic price tags are installed. That is, the installation is carried out, considering that the radiation characteristic of an antenna may be affected by the shape or size of a ground plane in a communication network using a monopole antenna. When the radio wave environment is measured in the same condition as the communication devices of the communication network which is to be actually applied, it is possible to minimize a difference between a radio wave reception environment measured during a test and the radio wave reception Page 8 environment of the communication network which is actually applied.
(0022] Each of the test modules 12 calculates an RSSI of the test signal received from the test signal transmission unit 11, and then transmits the calculated RSSI. When transmitting the calculated RSSI, the test module 12 combines its identifier with the calculated RSSI. Therefore, when the RSSI reception unit 13 receives the transmitted RSSI and the data analysis unit l analyzes the received RSSI, it is possible to check from which test modules 12 the RSSI was transmitted. Furthermore, since the test module 12 receives a test signal transmitted by the test signal transmission unit 11 to calculate an RSSI, signals used in other communication schemes may be prevented from having an effect upon the measurement result.
(0023] The RSSI reception unit 13 receives an RSSI transmitted from at least one or more test modules 12. Similar to the test signal transmission unit 11, the RSSI reception unit 13 may be implemented as a reception-dedicated communication device which does not have a function of transmitting a signal. As such, when the test signal transmission unit 11 is implemented as a transmission-dedicated communication device and the RSSI reception unit 13 is implemented as a reception-dedicated communication device, it is possible to prevent an error from occurring in the radio wave environment measurement due to an unnecessary transmission and reception communication trouble.
Page 9 (0024] The data analysis unit 14 may receive the RSSI of the signal transmitted from each of the test modules 12, and decide a radio wave reception environment at the position in which the test module 12 is installed, based on the RSSI.
(0025] Hereinafter, the operational effect of the system for measuring a radio wave reception environment using a wireless communication system according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
(0026] Referring to FIGS. 1 and2, thepluralityof testmodules 12 are disposed within a preset field F in which a radio wave reception environment is to be measured (Sli). In operation Sll in which the plurality of test modules 12 are disposed, the plurality of test modules 12 may be installed in the same ground condition as a wireless transmitter/receiver of a communication network which is to be actually applied, in order to minimize a difference between a radio wave reception environment measured during a test and the radio wave reception environment of the actually-applied network.
(0027] Then, the test signal transmission unit 11 transmits a test signal having a predetermined power to the measurement field F (Sl2) . The test signal transmission unit 11 may transmit the test signal through a preset transmission scheme.
For example, wireless LAN, Bluetooth, or ZigBee may be adopted as the communication scheme which may be used for the Page 10 transmission of the test signal.
(0028] subsequently, each of the test modules 12 installed in the measurement field F receives the test signal at the position in which the test module 12 is disposed (S13), and then calculates and transmits the RS5I of the received test signal (S14). The plurality of test modules 12 may adopt the same communication scheme as that applied to the test signal transmission unit 11 such that the test modules 12 may communicate with the test signal transmission unit 11. The RSSI5 calculated by the respective test modules 12 may differ from one another, depending on the radio wave reception environments of the positions in which the test modules 12 are disposed. That is, the RSSI5 may differ depending on distances from the test signal transmission unit 12 and interference by obstacles and other communication devices. For example, a test module disposed in an excellent radio wave reception environment without interference may have a high RSSI. On the other hand, a test module disposed in a poor radio wave reception environment may have a low R5SI.
(0029] Then, the RSSI reception unit 13 receives the RSSIs transmitted from the test modules 12 (S15) . At this time, a strong electric field should be maintained in the test modules 12 such that an error does not occur in the wireless communication between the test modules 12 and the RSSI reception unit 13. Therefore, although not shown, a plurality of RSSI Page 11 reception units 13 may be disposed within a distance in which
the strong electric field is maintained. The same
communication scheme as that applied to the test signal transmission unit 11 may be applied to the communication between the test modules 12 and the RSSI reception unit 13.
[0030] Meanwhile, the above-described operations gil to S15 may be repeated until the number of measurements reaches a preset number (S16).
(0031] Subsequently, the data analysis unit 14 analyzes the radio wave reception environments of the positions at which the respective test modules 12 are disposed, using the RSSIs which are measured by the respective test modules 12 and received a plurality of times. As shown in FIG. 3, the data analysis unit 14 may analyze the RSSI5 of the respective test modules 12 disposed in the measurement field into a graph form. Although not shown, a radio wave reception environment map may be created
by using a plan view of the measurement field.
(0032] According to the embodiment of the present invention, the measurement equipment is not directly connected to the test modules disposed in the measurement field via a cable.
Therefore, it is possible to remove an effect causedby the cable for the measurement equipment, which may occur depending on radio wave characteristics. Furthermore, since the RSSI of a signal received from the test signal transmission unit is used to measure a radio wave reception environment, it is possible Page 12 to exclude the interference caused by other communication devices. Furthermore, since changes in the radio wave environment are detected in real time, depending on changes in the measurement time and measurement position, the reliability of the measured data may be increased, and the measurement efficiency of a measurement system user may be improved.
Furthermore, since the test modules are installed in the same ground condition as a wireless transmitter/receiver of a communication network which is to be actually applied, it is possible to remove a difference between a radio wave reception environment during the test and a radio wave reception environment after the network is actually applied.
[0033] While the present invention has been shown and described in connection with the exemplary embodiments, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Page 13

Claims (6)

  1. What Is Claimed Is: 1. A system for measuring a radio wave reception environment, comprising: a test signal transmission unit transmitting a test signal having a predetermined power to a field in which a radio wave reception environment is to be measured; at least one or more test modules disposed within the measurement field, receiving the test signal transmitted from the test signal transmission unit, and calculating and transmitting a received signal strength indicator (RSSI) of the received test signal; an RSSI reception unit receiving the RSSI transmitted from the test module; and a data analysis unit analyzing the RSSI received by the RSSI reception unit and deciding the radio wave environment forthe measurement field.
  2. 2. The system of claim 1, wherein the test signal transmission unit, the test module, and the RSSI reception unit communicate through wireless LAN, Bluetooth, or ZigBee.
  3. 3. The system of claim 1, wherein the test module is installed in the same ground condition as a wireless transmitter/receiver of a communication network which is to beapplied to the measurement field.
    Page 14
  4. 4. A method for measuring a radio wave reception environment, comprising: installing a test module in a field in which a radio wave reception environment is to be measured; transmitting a test signal having a predetermined powerto the measurement field;receiving, at the test module, the test signal transmitted from the test transmission unit, and calculating and transmitting an RSSI of the received test signal; receiving the RSSI transmitted from the test module; and analyzing the received RSSI to decide the radio wavereception environment for the measurement field.
  5. 5. The method of claim 4, wherein the transmission and reception of the test signal and the RSSI are performed through wireless LAN, Bluetooth, or ZigBee.
  6. 6. The method of claim 4, wherein, in the installing of the test module, the test module is installed in the same ground condition as a wireless transmitter/receiver of a communication networkwhich is to be applied to the measurement field.Page 15
GB1021276A 2009-12-16 2010-12-15 Measuring a radio wave reception environment using RSSI values Withdrawn GB2476379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090125651A KR20110068609A (en) 2009-12-16 2009-12-16 System and method for measuring radio wave receiving environment

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GB2476379A true GB2476379A (en) 2011-06-22

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Cited By (2)

* Cited by examiner, † Cited by third party
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WO2014075424A1 (en) * 2012-11-16 2014-05-22 华为技术有限公司 Information processing method, apparatus and system
EP3051304A1 (en) * 2015-01-30 2016-08-03 Rohde & Schwarz GmbH & Co. KG Measuring device, system and method for wirelessly measuring radiation patterns

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
KR101443675B1 (en) * 2013-01-16 2014-09-23 인팩일렉스 주식회사 Radio Signal Measuring System for Vehicle

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US20020111772A1 (en) * 1998-12-29 2002-08-15 Skidmore Roger R. Method for creating a computer model and measurement database of a wireless communication network
US20040203436A1 (en) * 2002-11-13 2004-10-14 General Motors Corporation Radio signal strength mapping through a telematics system
US7515916B1 (en) * 2003-09-22 2009-04-07 Veriwave, Incorporated Method and apparatus for multi-dimensional channel sounding and radio frequency propagation measurements

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Publication number Priority date Publication date Assignee Title
US20020111772A1 (en) * 1998-12-29 2002-08-15 Skidmore Roger R. Method for creating a computer model and measurement database of a wireless communication network
US20040203436A1 (en) * 2002-11-13 2004-10-14 General Motors Corporation Radio signal strength mapping through a telematics system
US7515916B1 (en) * 2003-09-22 2009-04-07 Veriwave, Incorporated Method and apparatus for multi-dimensional channel sounding and radio frequency propagation measurements

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WO2014075424A1 (en) * 2012-11-16 2014-05-22 华为技术有限公司 Information processing method, apparatus and system
CN103825629A (en) * 2012-11-16 2014-05-28 华为技术有限公司 Information processing method, apparatus and system
CN103825629B (en) * 2012-11-16 2016-06-29 华为技术有限公司 A kind of method of information processing, Apparatus and system
EP3051304A1 (en) * 2015-01-30 2016-08-03 Rohde & Schwarz GmbH & Co. KG Measuring device, system and method for wirelessly measuring radiation patterns
CN105842547A (en) * 2015-01-30 2016-08-10 罗德施瓦兹两合股份有限公司 Measuring device, system and method for wirelessly measuring radiation patterns

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KR20110068609A (en) 2011-06-22

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