KR101760807B1 - Method and system for obtaining tv white space information by using sensor network - Google Patents

Method and system for obtaining tv white space information by using sensor network Download PDF

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KR101760807B1
KR101760807B1 KR1020150188244A KR20150188244A KR101760807B1 KR 101760807 B1 KR101760807 B1 KR 101760807B1 KR 1020150188244 A KR1020150188244 A KR 1020150188244A KR 20150188244 A KR20150188244 A KR 20150188244A KR 101760807 B1 KR101760807 B1 KR 101760807B1
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South Korea
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information
tvws
server
sensing
sensing devices
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KR1020150188244A
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Korean (ko)
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KR20170078087A (en
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황광일
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인천대학교 산학협력단
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    • 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
    • H04W16/14—Spectrum sharing arrangements between different networks
    • 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
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning

Abstract

A plurality of sensing devices for generating TVWS (TV White Space) information which is usable channel information from an RF input signal; At least one collection device for receiving TVWS information and location information from the plurality of sensing devices; And a DB server for receiving TVWS information and position information generated by each of the plurality of sensing devices from the at least one collection device and storing TVWS information for each location based on the received information. A system for acquiring TVWS information according to an embodiment of the present invention is disclosed.

Figure R1020150188244

Description

TECHNICAL FIELD [0001] The present invention relates to a method and system for acquiring regional TVWS information using a sensor network,

The present invention relates to the field of communications. More particularly, the present invention relates to a method and system for obtaining TVWS information across the country.

Recently, due to the growth of the wireless communication market and the explosion of wireless data usage, the shortage of frequency resources is becoming serious problem. Changes in the frequency policy paradigm for efficient utilization of limited frequency resources are taking place all over the world, and technological and policy measures are actively pursued accordingly. In order to prepare for the increase in demand for wireless data services, many countries including the US and Europe are considering extension of frequencies to utilize the existing 5 GHz license-exempt band as a frequency common use band. Also, for the mobile network service, the frequency bands of 2.3 GHz and 3.5 GHz are allocated by the licensed shared access (LSA) method, and the mobile communication service is increasingly being used in the urban area.

In order to secure broadband frequency resources, spectrum utilization policies such as technology for flexible use and sharing of frequencies, interference analysis, and interference management are being actively promoted all over the world, and the core for high efficiency and high capacity of spectrum use through frequency sharing Source technology is being actively researched and developed.

In particular, the policy, standardization, and technical standards for efficient use of the TVWS (TV White Space), which is currently not used locally and is an empty frequency band, among the frequencies distributed for TV broadcasting, It is being actively developed all over the world. As the US Federal Communications Commission (FCC) licenses license-exempt use of TVWS, research is underway around the world on spectrum-sharing technologies in this frequency band. In Korea, UHF band (470 MHz ~ 698 MHz) is considered as the candidate band of TVWS.

FIG. 1 is an exemplary diagram showing TVWS in an urban area and a rural area. As shown in FIG. 1, it can be seen that the number and types of channels available in urban areas and rural areas are different. Therefore, the TVWS device to use the TVWS must check the available channel information at the location where the TVWS is located. To do so, it is necessary to construct a TVWS DB for each region and provide TVWS information to the TWVS device.

A method and system for acquiring regional TVWS information using a sensor network according to an embodiment of the present invention aims at providing a new network configuration for acquiring TVWS TVWS information.

In addition, a method and system for acquiring regional TVWS information using a sensor network according to an embodiment of the present invention aims at collecting accurate TVWS information by location.

The TVWS information acquisition system according to an embodiment of the present invention includes:

A plurality of sensing devices for generating TVWS (TV White Space) information which is usable channel information from an RF input signal; At least one collection device for receiving TVWS information and location information from the plurality of sensing devices; And a DB server receiving TVWS information and position information generated by each of the plurality of sensing devices from the at least one collection device, and storing TVWS information for each location based on the received information.

Each of the plurality of sensing devices transmits the TVWS information and the position information generated by the sensing device to a sensing device capable of communicating with the collecting device while being positioned within a communication radius of the sensing device located within its own communication radius .

Each of the at least one collection device can transmit TVWS information and location information generated by each of the plurality of sensing devices through the mobile communication network or the Internet network to the DB server.

Each of the at least one collecting device compares the identification information list of the predetermined sensing device that is capable of communicating with itself and the sensing device that transmits the TVWS information and the position information to itself and transmits the TVWS information and the position information to itself A non-sensing device can be identified as an abnormal device.

Each of the at least one collection device can transmit information on the anomaly device to the DB server.

Each of the plurality of sensing devices may generate the TVWS information at predetermined intervals including a clock.

The DB server may transmit, to the TVWS device, TVWS information of a location closest to the location of the TVWS device among the stored location-specific TVWS information according to a request from the TVWS device.

According to another aspect of the present invention, there is provided a method of acquiring TVWS information,

A method of acquiring TVWS information, comprising: generating a TVWS (TV White Space) information, which is usable channel information, from an RF input signal of each of a plurality of sensing devices; The plurality of sensing devices transmitting the TVWS information and the position information to at least one collecting device; Transmitting the TVWS information and the position information generated by each of the plurality of sensing devices to the DB server by the at least one collecting device; And storing the TVWS information by location based on the received information.

Wherein the step of transmitting to the at least one collection device is a sensing device capable of communicating with the collection device while being located within its own communication radius when there is no collection device located within its own communication radius, And transmitting the location information.

The step of transmitting to the DB server may include transmitting TVWS information and location information generated by each of the plurality of sensing devices through the mobile communication network or the Internet network to the DB server.

The method of acquiring the TVWS information is characterized in that each of the at least one collecting device compares the identification information list of the sensing device that has transmitted the TVWS information and the position information to the sensing device itself and the sensing device that is pre- And identifying the sensing device that has not transmitted the position information to itself as an abnormality generating device.

The method of acquiring TVWS information may further include transmitting information on the abnormality-generating device to the DB server.

The generating may include generating the TVWS information whenever each of the plurality of sensing devices determines that a predetermined period has been reached through a clock.

The DB server further includes a step in which the DB server transmits to the TVWS device TVWS information at a position closest to the location of the TVWS device among the stored location-specific TVWS information according to a request from the TVWS device can do.

A method and system for acquiring regional TVWS information using a sensor network according to an embodiment of the present invention can achieve some effects as follows.

i) provide a new network configuration for acquisition of TVWS information.

ii) Accurate TVWS information can be collected by location.

However, the method and system for acquiring regional TVWS information using a sensor network according to an embodiment of the present invention can achieve the effects of the present invention not limited to those described above. And will be apparent to those skilled in the art to which the present invention pertains.

1 is an exemplary diagram showing TVWS information in an urban area and a rural area.
2 is a diagram illustrating a TVWS information acquisition system according to an embodiment of the present invention.
3 is a flowchart illustrating a method of acquiring TVWS information according to an embodiment of the present invention.
4 is a flow chart showing in detail the step S330 of FIG.
5 is a block diagram illustrating a configuration of a sensing device according to an embodiment of the present invention.
6 is a block diagram showing the configuration of a collecting device according to an embodiment of the present invention.
7 is a block diagram illustrating a configuration of a DB server according to an embodiment of the present invention.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the intention is not to limit the invention to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

In addition, components referred to in this specification as 'units', 'modules', and the like refer to hardware components such as software, FPGA, or ASIC, and these components perform certain roles. However, the components are not limited to software or hardware. The component may be configured to reside on an addressable storage medium. Further, two or more components may be merged into one component, or one component may be divided into two or more functions according to a more refined function. In addition, each of the components to be described below may additionally perform some or all of the functions of the other components in addition to the main functions of the component itself, and some of the main functions And may be performed entirely by components.

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

FIG. 2 is a diagram illustrating a TVWS information acquisition system according to an embodiment of the present invention, and FIG. 3 is a flowchart illustrating a method of acquiring TVWS information according to an embodiment of the present invention.

Referring to FIG. 2, the system for acquiring TVWS information according to an exemplary embodiment of the present invention includes a plurality of sensing devices 100, at least one acquisition device 200, and a DB server 300.

In step S310 of FIG. 3, each of the plurality of sensing devices 100 generates TVWS information, which is usable channel information, from the RF input signal input to the antenna. Here, the TVWS information may include, for example, information on which of the UHF bands is available.

Each of the sensing devices 100 may generate TVWS information based on cognitive radio technology. Cognitive radio is a promising means for realizing the concept of dynamic spectrum approach. Examples of a method of finding an unused channel, that is, a spectrum include a matched filter method, an energy detection method, and a feature extraction method. Each of the plurality of sensing devices 100 according to the present invention can generate TVWS information using various known methods.

Each of the plurality of sensing devices 100 includes a clock so that TVWS information can be obtained simultaneously at predetermined intervals. For example, each of the plurality of sensing devices 100 may generate TVWS information every 30 minutes and transmit the TVWS information to the collection device 200.

In step S320, each of the plurality of sensing devices 100 transmits its own TVWS information and its own location information, for example, GPS coordinate information, to the collection device 200 located within its own communication radius. 2, each of the a-sensing device 100a, the b-sensing device 100b, and the c-sensing device 100c transmits the TVWS information and the position information generated by the sensor device 100a to a collection device 200a, each of the e-sensing device 100e, the sensing device 100f and the g-sensing device 100g transmits its TVWS information and position information to the b-collection device 200b, the i-sensing device 100i and the j-sensing device 100j respectively transmit the TVWS information and the position information generated by the i-sensing device 100i and the j-sensing device 100j to the c-collection device 200c.

In the case of the sensing device 100k, there is no sensing device 200 located within the communication radius of the sensing device 100k. Therefore, the sensing device 100k, which is capable of communicating with the sensing device 100, The j sensing device 100j may transmit location information of the TVWS information to the device 100, that is, the j sensing device 100j, and the j sensing device 100j may forward the information to the c collecting device 200c.

The communication between the sensing device 100 and the collecting device 200 and between the sensing devices 100 can be performed according to a first communication method wherein the first communication method is Z-wave, Zigbee Or a communication method available in the sensor network, such as Bluetooth.

Each of the sensing devices 100 may transmit its own identification information, for example, a MAC address or a serial number, etc., when transmitting the TVWS information and location information to the collection device 200 or to the other sensing device 100 have.

In step S330, each of the at least one collection device 200 transmits the TVWS information and the location information collected from the plurality of sensing devices 100 to the DB server 300.

Communication between the collection device 200 and the DB server 300 may be performed according to a second communication method, wherein the second communication method may include a communication method through a mobile communication network or the Internet network.

 In step S340, the DB server 300 stores the TVWS information for each location based on the received TVWS information and the location information, and constructs a DB.

When the TVWS device to communicate with the TVWS requests the TVWS information to the DB server 300, the DB server 300 transmits the TVWS information generated by the sensing device 100 closest to the location of the TVWS device to the TVWS device .

According to the system for acquiring TVWS information according to an embodiment of the present invention, a plurality of sensing devices 100 for generating TVWS information are configured as sensor networks, and a collecting device 200 for collecting and transmitting the data is arranged Thus, it is possible to efficiently collect TVWS information of various regions, and to simply construct a DB.

4 is a flow chart showing in detail the step S330 of FIG.

In step S410, the collecting device 200 compares the identification information list of the predetermined sensing device 100, which is communicable with the collecting device 200, with the sensing device 100 that has transmitted the TVWS information and the location information to itself. For example, the a collection device 200a of FIG. 2 may be capable of communicating with itself and may store a list of identification information of the a-sensing device 100a, the b-sensing device 100b, and the c-sensing device 100c.

In step S420, the collecting device 200 determines whether there is a sensing device 100 that is present in the identification information list but has not transmitted the TVWS information and the location information to the collecting device 200 itself.

If there is a sensing device 100 that has not transmitted TVWS information and positional information to itself, the collecting device 200 identifies the sensing device 100 as an abnormality generating device in step S430, and in step S440, And transmits the information about the generated device to the DB server 300.

For example, if the a collection device 200a of FIG. 2 receives TVWS information and location information only from the a-sensing device 100a, the b-sensing device 100b, and the c-sensing device 100c, 100d as an abnormality generating device and transmit information about the dsensing device 100d to the DB server 300. [

In a sensor network, most of the sensors are operated by a battery, so that the operation of the sensor can be stopped due to battery discharge. Also, since a plurality of sensors are operated at the same time, In the embodiment of the present invention, for the sensing device 100 which does not generate the TVWS information and the position information among the plurality of sensing devices 100 or does not transmit the TVWS information and the position information to the collecting device 200, The accuracy and reliability of the TVWS DB can be improved.

5 is a block diagram illustrating a configuration of a sensing device 500 according to an embodiment of the present invention. 5, a sensing device 500 according to an exemplary embodiment of the present invention may include an RF signal receiving unit 510, a sensing unit 530, a position information obtaining unit 550, and a communication unit 570 .

The RF signal receiving unit 510 receives an RF signal input to the antenna, and the sensing unit 530 senses usable channel information from the received RF signal to generate TVWS information. The location information obtaining unit 550 obtains its own location information, for example, GPS coordinates.

The communication unit 570 communicates according to the first communication method and transmits the TVWS information and the position information to the collection device 200 located in the communication area of the communication unit 570. If the collection device 200 does not exist in the communication area of the communication device 570 , And transmits TVWS information and location information to a sensing device (500) capable of communicating with the collection device (200).

6 is a block diagram showing a configuration of a collecting device 600 according to an embodiment of the present invention. 6, the collecting device 600 according to an embodiment of the present invention may include a first communication unit 610, a storage unit 630, and a second communication unit 650.

The first communication unit 610 receives the TVWS information and the position information from the sensing device 100 according to the first communication method. The second communication unit 650 transmits the TVWS information and the position information received by the first communication unit 610 to the DB server 300 according to the second communication method.

The storage unit 630 stores a list of identification information of the sensing device 100 that can communicate with the storage unit 630. The second communication unit 650 transmits the information of the sensing device 100, which can communicate with itself but does not transmit the TVWS information and the location information, to the DB server 300.

7 is a block diagram showing a configuration of a DB server 700 according to an embodiment of the present invention. Referring to FIG. 7, a DB server 700 according to an embodiment of the present invention may include a communication unit 710, a storage unit 730, and an information search unit 750.

The communication unit 710 communicates with the collection device 200 through the second communication method and receives TVWS information and location information from the collection device 200. [ The storage unit 730 stores and DBWS information for each location based on the TVWS information and the location information received from the collection device 200.

When a request for TVWS information is received from the TVWS device, the information searching unit 750 searches for the TVWS information closest to the position of the TVWS device and transmits the TVWS information retrieved to the TVWS device through the communication unit 710. [

According to the method and system for obtaining regional TVWS information using a sensor network according to an embodiment of the present invention, it is possible to collect accurate TVWS information by location through a new network configuration for acquiring TVWS information.

Meanwhile, the embodiments of the present invention described above can be written in a program that can be executed in a computer, and the created program can be stored in a medium.

The medium may be a storage such as a magnetic storage medium (e.g., ROM, floppy disk, hard disk, etc.), an optical reading medium (e.g. CD ROM, DVD, etc.) and a carrier wave Media, but is not limited thereto.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100, 500: sensing device 200, 600: collecting device
300, 700: DB server 510: RF signal receiver
530: sensing unit 550: position information obtaining unit
570: communication unit 610: first communication unit
630: storage unit 650: second communication unit
710: communication unit 730:
750: Information retrieval unit

Claims (14)

A plurality of sensing devices for generating TVWS (TV White Space) information which is usable channel information from an RF input signal;
At least one collection device for receiving TVWS information and location information from the plurality of sensing devices; And
And a DB server for receiving the TVWS information and the position information generated by each of the plurality of sensing devices from the at least one collection device and storing TVWS information for each position based on the received information,
Wherein each of the plurality of sensing devices comprises:
And transmits the generated TVWS information and the position information to a sensing device which is located within its own communication radius and can communicate with the collection device when there is no collection device located within its own communication radius. Acquisition system.
delete The method according to claim 1,
Wherein each of the at least one collection device
And transmits the TVWS information and the location information generated by each of the plurality of sensing devices to the DB server through the mobile communication network or the Internet network.
The method according to claim 1,
Wherein each of the at least one collection device
The identification information list of the predetermined sensing device which is capable of communicating with itself, and the sensing device that transmits the TVWS information and the position information to itself, identifies the sensing device that has not transmitted the TVWS information and the position information to itself, The TVWS information acquisition system comprising:
5. The method of claim 4,
Wherein each of the at least one collection device
And transmits information on the abnormality generating device to the DB server.
The method according to claim 1,
Wherein each of the plurality of sensing devices comprises:
And generates the TVWS information every predetermined period, including the clock.
The method according to claim 1,
The DB server,
And transmits the TVWS information at a position closest to the location of the TVWS device among the stored location-specific TVWS information to the TVWS device according to a request from the TVWS device.
A method for acquiring TVWS information,
Each of the plurality of sensing devices generating TVWS (TV White Space) information which is usable channel information from the RF input signal;
The plurality of sensing devices transmitting the TVWS information and the position information to at least one collecting device;
Transmitting the TVWS information and the position information generated by each of the plurality of sensing devices to the DB server by the at least one collecting device; And
The DB server storing TVWS information by location based on the transmitted information,
Wherein the transmitting to the at least one acquisition device comprises:
And transmitting the generated TVWS information and the position information to a sensing device capable of communicating with the collection device while being positioned within a communication radius thereof when the collection device located within its own communication radius does not exist A method of acquiring TVWS information.
delete 9. The method of claim 8,
Wherein the step of transmitting to the DB server comprises:
And transmitting the TVWS information and the location information generated by each of the plurality of sensing devices through the mobile communication network or the Internet network to the DB server.
9. The method of claim 8,
The TVWS information acquisition method includes:
Each of the at least one collecting device compares the identification information list of the sensing device that has been previously communicatable with the sensing device that has transmitted the TVWS information and the position information to itself and transmits the TVWS information and the position information to itself Further comprising the step of identifying a non-sensing device as an abnormality generating device.
12. The method of claim 11,
The TVWS information acquisition method includes:
And transmitting information on the abnormality generating device to the DB server.
9. The method of claim 8,
Wherein the generating comprises:
And generating the TVWS information whenever each of the plurality of sensing devices determines that a predetermined period has been reached through a clock.
9. The method of claim 8,
The TVWS information acquisition method includes:
Further comprising transmitting, by the DB server, TVWS information of a position closest to the position of the TVWS device among the stored TVWS information according to a request from the TVWS device to the TVWS device Acquisition method.

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011176506A (en) * 2010-02-23 2011-09-08 National Institute Of Information & Communication Technology Cognitive wireless communication system, and white space sensing database provided in cognitive wireless communication system, and cognitive wireless communication method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011176506A (en) * 2010-02-23 2011-09-08 National Institute Of Information & Communication Technology Cognitive wireless communication system, and white space sensing database provided in cognitive wireless communication system, and cognitive wireless communication method

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