KR101600746B1 - Analysis method for quality of indoor signal propagation using variable signature sequence in construction and location determination system for placing apparatus using wireless communication in construction - Google Patents
Analysis method for quality of indoor signal propagation using variable signature sequence in construction and location determination system for placing apparatus using wireless communication in construction Download PDFInfo
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- KR101600746B1 KR101600746B1 KR1020150048277A KR20150048277A KR101600746B1 KR 101600746 B1 KR101600746 B1 KR 101600746B1 KR 1020150048277 A KR1020150048277 A KR 1020150048277A KR 20150048277 A KR20150048277 A KR 20150048277A KR 101600746 B1 KR101600746 B1 KR 101600746B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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Abstract
A method of analyzing propagation quality in a structure using a variable sequence comprises the steps of: transmitting a first test packet, the first test packet being a digital signal having a first length at a first location in the structure, Transmitting a second test packet having a second length greater than the first length when it fails to receive a response signal for the first test packet from a second measurement device within the structure, The measuring device receiving the second test packet and transmitting an echo back packet, which is a digital signal in response to the second test packet, and the first measuring device receiving the echo back packet, And measuring the quality.
Description
The techniques described below relate to techniques for analyzing propagation quality between specific locations within a structure and for placing wireless communication devices within the structure.
Recently, smart buildings equipped with various sensors are becoming an issue. In smart buildings, various sensors that acquire certain information are used.
Smart buildings are typically large buildings, and a large number of sensors are placed in large internal spaces. Therefore, in consideration of the cost burden due to the wired line, the damage of the structure, and the difficulty of design, the smart building minimizes the section connecting the wired sensor and wirelessly performs the communication between the sensors or between the sensor and the AP.
The arrangement of the sensors in the structure is generally based on the experience of the installer or is arranged in a zone of a certain size. However, depending on the structure of the actual structure, the signal transmission may not be smooth regardless of the distance between the transmitting apparatus and the receiving apparatus.
The technique described below attempts to determine in advance whether a communication is smoothly performed at a location where the sensor is disposed in a structure such as a smart building, to determine the position where the sensor is disposed.
The technique described below seeks to determine the point at which the sensor is to be placed by analyzing the characteristics of propagation of the propagation between two points in the structure using packets having sequences of different lengths.
The solutions to the technical problems described below are not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.
A method for analyzing propagation quality in a structure using a variable sequence rule comprises the steps of: transmitting a first test packet at a first location in a structure, the first measurement device being a digital signal having a first length; Transmitting a second test packet having a second length greater than the first length when the second measurement device fails to receive a response signal for the first test packet from the second measurement device, Receiving a second test packet, transmitting an echo back packet as a digital signal in response to the second test packet, and measuring a channel quality of a current communication channel based on the echo back packet from the first measurement device do.
A positioning system for placement of a device for performing wireless communication in a structure transmits a digitally modulated test packet located at a first location in a building and to a specific channel, A first measurement device that transmits a second test packet having a second length that is longer than the first length and that receives the echo back packet from the second measurement device and measures the channel quality of the specific channel when the echo back packet is not received, And a second measuring device located at a second location in the building and receiving a second test packet and transmitting an echo back packet having a second length.
The techniques described below can measure the quality of a radio wave without wasting energy using a sequence of appropriate lengths depending on the distance between the two points and / or the available power, which are located at two points in the structure.
The effects of the techniques described below are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an example of a block diagram showing the configuration of a positioning system of an apparatus for performing wireless communication in a structure. Fig.
Figure 2 is an example of a flowchart for a method of analyzing radio wave quality within a structure using a variable sequence.
3 shows an example of the configuration of a packet used for radio wave quality measurement.
4 is another example of a flowchart for a method of analyzing radio wave quality in a structure using a variable sequence.
5 is an example of a flow chart of the operation of the first measurement device for transmitting test packets.
6 is an example of a flow chart of the operation of the second measurement apparatus for transmitting an echo back packet.
The following description is intended to illustrate and describe specific embodiments in the drawings, since various changes may be made and the embodiments may have various embodiments. However, it should be understood that the following description does not limit the specific embodiments, but includes all changes, equivalents, and alternatives falling within the spirit and scope of the following description.
The terms first, second, A, B, etc., may be used to describe various components, but the components are not limited by the terms, but may be used to distinguish one component from another . For example, without departing from the scope of the following description, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.
As used herein, the singular " include "should be understood to include a plurality of representations unless the context clearly dictates otherwise, and the terms" comprises & , Parts or combinations thereof, and does not preclude the presence or addition of one or more other features, integers, steps, components, components, or combinations thereof.
Before describing the drawings in detail, it is to be clarified that the division of constituent parts in this specification is merely a division by main functions of each constituent part. That is, two or more constituent parts to be described below may be combined into one constituent part, or one constituent part may be divided into two or more functions according to functions that are more subdivided. In addition, each of the constituent units described below may additionally perform some or all of the functions of other constituent units in addition to the main functions of the constituent units themselves, and that some of the main functions, And may be carried out in a dedicated manner. Therefore, the existence of the respective components described in this specification will be functionally interpreted, and for this reason, the configuration of the components according to the positioning system 100 of the apparatus for performing wireless communication in the structure described below is not limited to the following It should be clear that it can be different from the corresponding drawings to the extent that the object of the described technique can be achieved.
Also, in performing a method or an operation method, each of the processes constituting the method may take place differently from the stated order unless clearly specified in the context. That is, each process may occur in the same order as described, may be performed substantially concurrently, or may be performed in the opposite order.
A structure means an object or a building made of a certain material, but in the following description, the structure means an architectural structure.
The technique described below is for determining the position of a sensor device installed in a structure. That is, whether or not communication is smoothly performed between a point at which the first measuring apparatus is located and a point at which the second measuring apparatus is located using the first measuring apparatus and the second measuring apparatus described below before setting the sensor apparatus in the structure In advance. The person who wants to verify the position determines the optimal position by changing the positions of the first measuring device and the second measuring device. The measuring device is preferably a portable device that can be carried by a person.
The first measurement device is a device that transmits an initial signal for communication quality measurement, and the second measurement device is an device that receives an initial signal and transmits an echo back packet. The hardware configuration of the first measuring device and the second measuring device may be the same. Or a device having a different hardware structure.
The sensor device transmits data collected by itself based on various wireless communication techniques or transmits data transmitted by another device. The sensor device includes various devices such as a temperature sensing sensor, a humidity sensing sensor, a light sensing sensor, a motion detection sensor, an image acquisition sensor, and the like, which are used in smart buildings and the like.
1 is an example of a block diagram illustrating the configuration of a positioning system 100 of an apparatus for performing wireless communication within a structure.
Fig. 1 (a) shows a
The location system 100 of the device performing wireless communications within the structure is configured to transmit a digitally modulated test packet located at a first location in the structure and to a specific channel and to echo back from the
The positioning system 100 of the apparatus for performing wireless communication within the structure may also include a
1 (b) is an example of a block diagram showing the configurations of the
The signal generation unit 111 of the
The transmitting / receiving unit 112 of the
The signal generating unit 121 of the
On the other hand, the
2 is an example of a flowchart for a
First, the
If the
The length of the test packet may be determined empirically or may be determined through repetitive signaling. Further, an administrator using the measuring apparatus may be set up.
The length determined in
Then, at a first location within the structure, the
The
The
The time interval at which the
Also, the
If the contents of the echo back packet are known in advance, the
3 shows an example of the configuration of a packet used for radio wave quality measurement. It is assumed that the test packet generated by the
The packet includes a synchronization sequence for synchronization with the receiving signal and a test sequence for channel quality measurement. The test sequence may be data representing a specific character, or may be a sequence of bits with no meaning. The number to the right of the test sequence in the packet means the identifier for the sequence block. That is, FIG. 3 (a) and FIG. 3 (b) all show N sequence blocks. The set of sequences shown in Fig. 3 (a) may be one packet.
Fig. 3 (b) shows a packet having a test sequence longer in length than Fig. 3 (a). FIG. 3C shows a packet having the same sequence block as FIG. 3 (a) but having the number of sequence blocks greater than N (that is, N <M).
Referring to FIG. 2, the
Furthermore, the test packet and / or the echo back packet may have a structure different from the structure shown in Fig.
Figure 4 is another example of a flowchart for a
First, a
Then, the
Although not shown in FIG. 4, if the
In this process, a process of repeatedly transmitting test packets may occur. Therefore, it may be important to set the first length of the initial test packet appropriately. It may also be important to properly determine the length of the second test packet to be transmitted if the response signal to the first test packet of the first length is not received. In other words, it may be important to appropriately determine the unit of length that will increase if a response signal is not received. Further, when the
The
The
Figure 5 is an example of a flowchart for an
It is assumed that the measuring device is in the first position and the second position of the structure. The apparatus in which the user transmits the initial test packet to measure the quality of the communication channel can operate as the first measuring apparatus described above. In this case, the
First, the
If the echo back packet is not received during the reference time, the
If the echo back packet is normally received, the
6 is an example of a flowchart for an
The
The
If the third test packet is not received during the reference time, the
If the third test packet is normally received within the reference time, the
Then, it is determined whether the measurement is completed (580), and if not, the test packet is returned to the standby state for receiving the test packet (510).
Further, the
Further, the
The location in the structure may be input by a user directly by inputting specific location information, or may utilize a conventional technique (such as a technique using a WiFi AP) for locating a structure.
It should be noted that the present embodiment and the drawings attached hereto are only a part of the technical idea included in the above-described technology, and those skilled in the art will readily understand the technical ideas included in the above- It is to be understood that both variations and specific embodiments which can be deduced are included in the scope of the above-mentioned technical scope.
100: Positioning system of a device performing wireless communication in a structure
110: first measuring device 111: signal generating unit
112: Transmitting / receiving unit 113: Quality measurement unit
114: Measurement data storage unit 120: Second measurement device
121: Signal Generation Unit 122: Transmission /
123: Quality measurement unit 124: Measurement data storage unit
130: Repeater
Claims (12)
If the first measurement device fails to receive a response signal for the first test packet from the second measurement device within the reference time, transmits a second test packet having a second length longer than the first length to the specific channel step;
Receiving the second test packet from the second measurement device at a second location in the structure and transmitting an echo back packet as a digital signal in response to the second test packet; And
Wherein the first measurement device measures a channel quality of a current communication channel based on the echo back packet,
Wherein the first measurement device measures a channel quality of the echo back packet based on at least one of a time interval of receiving the echo back packet after transmitting the second test packet, a strength of a signal including the echo back packet, At least one of the first measuring apparatus and the second measuring apparatus analyzes the radio wave quality in the structure using a variable sequence storing the first position and the second position when the channel quality is equal to or greater than the reference value Way.
Wherein the first measurement device analyzes a quality of a radio wave in a structure using a variable sequence that digitally modulates the first test packet and the second test packet using a PSK (Phase Shift Keying) method or a QAM (Quadrature Amplitude Modulation) method.
Wherein the first measurement device transmits the first test packet and the second test packet on a specific channel and uses the variable sequence to transmit the echo back packet to the specific channel to the second measurement device, .
Wherein the first length is a variable sequence that is a length corresponding to a distance between the first measurement device and the second measurement device or a transmission power of the first measurement device.
When the first measuring device does not receive a response signal for the second test packet from the second measuring device within the reference time in the step of transmitting the second test packet, 2 A method for analyzing the quality of radio waves in a structure using a variable sequence that transmits test packets.
Wherein the echo back packet is for analyzing the quality of radio waves in the structure having the second length.
The first measurement device transmitting a third test packet having the second length; And
Wherein the second measurement device receives the third test packet, transmits the echo back packet, and determines a time interval when the third test packet is received, a strength of a signal including the third test packet, And measuring a channel quality based on at least one of a transmission rate of the transmission channel and a transmission rate of the transmission channel.
The first measurement device transmitting a third test packet having the second length;
The second measurement device receiving the third test packet and transmitting a second echo back packet; And
Further comprising the step of the first measurement device receiving the second echo back packet and measuring the channel quality based on the second echo back packet.
And a second measurement device located at a second location in the building and receiving the second test packet and transmitting the echo back packet having the second length,
Wherein the first measurement device measures a channel quality of the echo back packet based on at least one of a time interval of receiving the echo back packet after transmitting the second test packet, a strength of a signal including the echo back packet, Wherein at least one of the first measuring device and the second measuring device stores the first position and the second position when the channel quality is equal to or greater than a reference value, .
Wherein the length of the second test packet corresponds to the transmission power of the first measurement device and the distance between the first measurement device and the first measurement device.
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KR20040106541A (en) * | 2002-05-13 | 2004-12-17 | 퀄컴 인코포레이티드 | Method to check communication link reliability |
US20090092695A1 (en) | 2007-10-09 | 2009-04-09 | Formosa Biomedical Technology Corp. | Health supplement for lowering plasma glucose and plasma triglyceride |
KR20100012014A (en) * | 2008-07-27 | 2010-02-04 | 엘지전자 주식회사 | Method for using resource in irregular cell |
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