KR20130096466A

KR20130096466A - Method for estimating and transmitting location information of terminal using gateway with multiple antenna

Info

Publication number: KR20130096466A
Application number: KR1020120017939A
Authority: KR
Inventors: 최호림; 박종설; 김효섭
Original assignee: 주식회사 플렉스엘시디; 주식회사 온비트
Priority date: 2012-02-22
Filing date: 2012-02-22
Publication date: 2013-08-30

Abstract

The present invention relates to a method for estimating a location of a terminal and a method for transmitting the location information in a wireless communication system using a gateway having a plurality of antennas.
The present invention provides a method for estimating a position of a terminal in a wireless communication system using a plurality of gateways, the method comprising the steps of: Detecting and determining a channel having the largest RSSI; (b) transmitting, by the terminal, authentication information of the terminal to a gateway of a channel having the largest RSSI; (c) processing the location of the gateway of the channel with the largest RSSI as the current location of the terminal in the central server receiving the authentication information of the terminal through the gateway of the channel with the largest RSSI. do.

Description

METHODS FOR ESTIMATING AND TRANSMITTING LOCATION INFORMATION OF TERMINAL USING GATEWAY WITH MULTIPLE ANTENNA}

The present invention relates to a location of a terminal in a wireless communication system, and more particularly, to a location estimation and a method of transmitting the location information in a wireless communication system using a gateway having a plurality of antennas.

In general, the gateway estimates the position of the terminal while communicating with a plurality of communication nodes (for example, mobile terminals) in a certain area (signal coverage area) in the USN communication system, and provides information based on the estimated position. Send and receive

To this end, the gateway has a built-in or external wireless communication module for wireless communication, and is equipped with an antenna.

The conventional gateway is configured to transmit and receive an information signal with one antenna.

However, in the related art, when there are a plurality of mobile terminals in a certain signal coverage area capable of wireless communication with the corresponding gateway, a plurality of signals are transmitted and received simultaneously through one antenna, resulting in communication overload or delay, which causes some mobile devices. There is a problem that the information signal transmitted from the terminal is delayed and received, and the transmission is not performed properly.

In addition, when a plurality of gateway signals are received by the terminal, it is not known exactly through which gateway the corresponding signal is received, thereby causing a problem that the location estimation performance through the gateway is greatly reduced.

The present invention has been made to solve the above problems of the prior art, the general object of the present invention is provided with a plurality of antennas that can substantially eliminate one or more problems caused by the limitations and disadvantages in the prior art. In a wireless communication system using a gateway to provide a location estimation of the terminal and the location information transmission method.

Another specific object of the present invention is to provide a method for estimating a position of a terminal in a wireless communication system using a gateway having a plurality of antennas capable of reducing a position estimation error of the terminal in a wireless communication system using a gateway.

Another specific object of the present invention is a wireless communication system using a gateway having a plurality of antennas that can reduce delays and communication failures due to overload of the gateway according to the number of portable terminals in a wireless communication system using a gateway. It is to provide a location estimation of the terminal and a method of transmitting the location information.

To this end, the method for estimating the position of a terminal in a wireless communication system using a plurality of gateways according to an embodiment of the present invention, in the method for estimating the position of a terminal in a wireless communication system using a plurality of gateways, (a) the Scanning channels of received signals from the plurality of gateways to detect received signal strength (RSSI) of each channel, and then determining a channel having the largest RSSI; (b) transmitting, by the terminal, authentication information of the terminal to a gateway of a channel having the largest RSSI; (c) processing the location of the gateway of the channel with the largest RSSI as the current location of the terminal in the central server receiving the authentication information of the terminal through the gateway of the channel with the largest RSSI. do.

In one embodiment of the present invention, (d) before the step (b), further comprising the step of repeating the step (a) so that the channel with the largest RSSI for the predetermined number of times.

In one embodiment of the present invention, each of the plurality of gateways includes a plurality of antennas including at least a transmission-only antenna and a transmission / reception antenna.

In one embodiment of the present invention, each of the plurality of gateways has a dedicated channel for transmitting only antennas, and transmitting and receiving antennas have the same channel with each other.

In one embodiment of the present invention, each of the gateways disposed adjacent to each other of the plurality of gateways has a different channel between the transmit-only antennas and the transmit-only antennas, the transmit-and-receive antennas.

In addition, the present invention is a method of transmitting location information of a terminal in a wireless communication system using a plurality of gateways, (A) the received signal strength of each channel by scanning the channel of the received signals transmitted from the plurality of gateways in the terminal ( Detecting the RSSI) and then determining a channel with the largest RSSI; (B) transmitting the authentication information of the terminal to the gateway of the channel with the largest RSSI; (C) the terminal rescans the channels of the received signals transmitted from the plurality of gateways, detects the received signal strength (RSSI) of each channel, and then determines the gateway of the channel having the largest RSSI as the gateway closest to the terminal. Process of doing; (D) determining whether the gateway determined to be closest to the terminal in step (C) is the same as the gateway that received authentication information of the terminal in step (B); (E) if the gateway of step (D) is the same as the gateway of step (D), the step of transmitting authentication information of the terminal to the corresponding gateway if the gateway of step (D) is not the same.

In one embodiment of the present invention, (F) if the gateway of step (C) and the gateway of step (D) are the same as the result of the determination of step (D), the gateway until the gateway is repeated for a predetermined number of times; The method further includes transmitting authentication information of the terminal to the corresponding gateway after repeating process (C) and process (D).

In one embodiment of the present invention, each of the plurality of gateways includes a plurality of antennas including at least a transmit-only antenna and a transmit / receive antenna.

In addition, the position recognition system of the present invention includes a transmission-only antenna and a transmission and reception antenna, transmitting a broadcasting signal including its own location information through the transmission-only antenna, and transmitting and receiving a signal through the transmission and reception antenna A plurality of gateways; A user terminal scanning a channel of received signals transmitted from a plurality of gateways to detect received signal strength (RSSI) of each channel, and then transmitting authentication information of the terminal to a gateway of a channel having the largest RSSI; And a central server configured to determine the location of the user terminal through authentication information of the user terminal received from the gateway and location information of the gateway.

In one embodiment of the present invention, each of the plurality of gateways is characterized in that it comprises a transmission-only antenna and a transmission and reception antenna.

In one embodiment of the present invention, each of the plurality of gateways is characterized in that the transmit-only antennas are transmit-only antennas, the transmitting and receiving antennas have the same channel with each other.

In one embodiment of the present invention, each of the gateways disposed adjacent to each other of the plurality of gateways is characterized in that the transmission-only antenna has a different channel between the transmission-only antennas, the transmitting and receiving antennas between the transmitting and receiving antennas.

According to a method of estimating the position of a terminal and transmitting the position information thereof in a wireless communication system using a gateway having a plurality of antennas according to the present invention, a communication overload may be obtained by appropriately distributing a load using a gateway having a transmission-only antenna and a transmission / reception antenna. Communication disturbances caused by delay can be improved.

1 is a perspective view of a gateway according to an embodiment of the present invention.
FIG. 2 is a block diagram schematically illustrating a configuration of the gateway of FIG. 1.
3 is a diagram showing the configuration of a wireless communication system using a gateway having a plurality of antennas according to an embodiment of the present invention.
4 is a flowchart illustrating a position estimation process of a terminal in a wireless communication system using a gateway having a plurality of antennas according to an embodiment of the present invention.
5 is a flowchart illustrating a process of transmitting location information of a terminal in a wireless communication system using a gateway having a plurality of antennas according to another embodiment of the present invention.
6 is a conceptual diagram illustrating the process of FIG. 5.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, the definition should be based on the contents throughout this specification.

First, Figure 1 is a perspective view of a gateway according to an embodiment of the present invention, Figure 2 is a block diagram schematically showing the configuration of the gateway of FIG.

1 and 2, the gateway 100 according to an embodiment of the present invention includes a main body 110 having a control unit 210 and a communication unit 220 for transmitting and receiving signals, and the main body 110. It includes two antennas (120, 130) integrally formed in). Here, there is no limitation on the shape of the main body 110, but in the present embodiment is implemented in a rectangular shape.

The controller 210 is embedded in the main body 110 and controls the overall operation of the gateway 100. In particular, a signal is transmitted through a broadcasting dedicated antenna (first antenna) 120 in a broadcast manner, and a signal is transmitted in a dual communication (duplex communication) scheme through a transmit / receive antenna (second antenna) 130. Control to send and receive.

In the present embodiment, a configuration in which one control unit 210 controls both transmission-only transmission and reception communication is disclosed, but the transmission-only control unit and the transmission / reception control unit may be implemented separately.

The communication unit 220 includes a transmitter 221 and a receiver 222 and is built in the main body. The transmitter 221 processes a signal to be transmitted through the transmit-only antenna 120 and the combined transmit / receive antenna 130 under the control of the controller 210 and transmits the signal to the transmit-only antenna.

The receiver 222 processes the signal received through the dual-transmission and reception antenna 130 under the control of the controller 210.

The transmission-only antenna (first antenna) 120 and the transmission / reception antenna (second antenna) 130 relay transmission signals from the transmission unit 221 and reception signals to be input to the reception unit 222. Here, the transmission-only antenna 120 and the dual-use antenna 130 transmits or receives a signal through two different channels Ch A and Ch B. That is, it transmits the common push information in the service area (signal coverage area) through the transmission-only antenna 120 and transmits and receives signals with a specific wireless communication device in the service area through the dual-use antenna 130. do.

For example, the location information and the time setting signal of the gateway, which should be transmitted to the mobile terminals in the service area in common, are transmitted through the transmission-only antenna 120 in a broadcasting manner, and the authentication information and the reservation information for the specific mobile terminal. , Location information, etc. are received through the transceiver 130 and transmit a specific information signal to the mobile terminal. That is, it transmits and receives a signal in a dual communication (bidirectional communication) method.

As described above, the gateway according to the present embodiment includes at least two antennas including a transmission-only antenna and a transmitting / receiving antenna to distribute loads, thereby causing delays when simultaneously processing a plurality of signals through one antenna. Problems such as signal interference can be improved.

3 is a diagram illustrating a configuration of a location estimation and information transmission system using a gateway having a plurality of antennas according to an embodiment of the present invention. In the present embodiment, four gateways 101 to 104 are installed in one zone (first exhibition hall) to estimate the location of a specific mobile terminal and transmit the location information. The area | region which can communicate is set to each zone Z1-Z4.

Referring to FIG. 3, the location information transmission system 1 using a gateway having a plurality of antennas according to an embodiment of the present invention includes a plurality of gateways 101 to 104 and a plurality of gateways 101 to 104. And a plurality of portable terminals 200, 201, 2012, 202, 2023, 203, and 204 located in a service area (signal coverage area) capable of short-range wireless communication, and a plurality of gateways 101 to 104 through a communication network. It includes a central server 300 connected.

The gateways 101 to 104 include transmission dedicated antennas (Ch A1, Ch A2, Ch A3, and Ch A4) and transmission and reception antennas (Ch B1, Ch B2, Ch A3, and Ch A4), wherein each gateway ( Transmit-only antennas (Ch A1, Ch A2, Ch A3, Ch A4) of 101 to 104 are the transmit / receive antennas (Ch B1, Ch B2, Ch A3, Ch A4) of each of the gateways 101 to 104. ) Has the same channel between the transmitting and receiving antennas. That is, Ch A1 = Ch A2 = Ch A3 = Ch A4, and Ch B1 = Ch B2 = Ch B3 = Ch B4.

The gateways 101 to 104 are common to the mobile terminals 200, 201, 2012, 202, 2023, 203, and 204 in each service area, that is, Z1, Z2, Z3, and Z4 through a transmission-only antenna Ch A. It transmits push information, and transmits and receives a specific signal to and from a specific mobile terminal 200 in the service area through a transmission and reception antenna (Ch B). That is, the first gateway 101 transmits common push information in Z1 including location information of the first gateway 101 to the 200, 201, and 2012 mobile terminals located in Z1 through the transmission-only antenna Ch A1. The second gateway 102 is a common push in Z2 including the location information of the second gateway 102 to 200, 202, 2012, and 2023 mobile terminals located in Z2 through a transmission-only antenna Ch A2. Send (broadcast) information. Similarly, the third gateway 103 transmits common push information in Z3 including the location information of the third gateway 103 to the 200, 203, and 2023 portable terminals located in Z3 through the transmission-only antenna Ch A3. The fourth gateway 104 transmits common push information in Z4 including the location information of the fourth gateway 104 to the 200 and 204 portable terminals located in Z4 through the transmission-only antenna Ch A4.

In addition, the authentication information of the mobile terminal 200 is received through the transmission and reception antenna (Ch B2) of the gateway 102 which is located closest to the mobile terminal 200 among the gateways 101 to 104 to receive the corresponding authentication information. It transmits to the central server 300 together with the location information of itself (gateway 102) and transmits specific information requested by the mobile terminal 200 received from the central server 300, for example, destination information. Transmit to the mobile terminal 200 via B2).

The mobile terminal 200, 201, 202, 203, 204, 2012, 2023 receives a signal broadcast through a transmission-only antenna from all the gateways in the range through short-range wireless communication, and the channel of the received signals at regular intervals Receive and compare the received signal strength (Receive Signal Strength Indicate (RSSI)) of the received signal by scanning and transmits its authentication information to the gateway to which the RSSI is the largest signal.

For example, in FIG. 3, the mobile terminal 200 overlapping four zones Z1 to A4 is located at four gates 101 to 104 for transmission-only antennas Ch A1, Ch A2, Ch A3, and Ch A4. Receive the broadcasted signal and scan the channel of the received signals sequentially (Ch A1 → Ch A2 → Ch A3 → Ch A4) so that the RSSI is the most optimal (closest) gateway 102 Search for. The gateway 102, which is located closest to the terminal, transmits a destination information request signal for requesting authentication information of the 200 and a specific signal, for example, information about a location, a waiting person, a congestion degree, etc. Receives an information signal for a destination transmitted via the dual-use antenna Ch B2 of 102.

In this case, a channel scan for searching for an optimal channel having the largest RSSI is performed at regular intervals, and an error can be reduced as the number of scan repetitions for the same channel is increased. However, since the gateway does not receive the information signal during the channel scan, the channel scan period and the number of scan repetitions are appropriately adjusted.

The central server 300 receives the authentication information of the mobile terminal 200 transmitted through the transmission and reception antenna (Ch B2) of the gateway 102 and authenticates whether or not match with the stored mobile terminal 200 or its user information. Then, the information about the requested destination is transmitted to the corresponding mobile terminal 200 through the transmission and reception antenna (Ch B2) of the gateway 102.

The central server 300 stores location information on the installation location of each of the gateways 101 to 104, and authenticates the identification information of the mobile terminal or its wearer, and transmits the authentication information of the mobile terminal. The location information of the terminal wearer is acquired through the location information of ˜104). In addition, when specific information, for example, a destination information request signal is received from the mobile terminal 200, the requested corresponding information such as a distance from the current location of the user to the destination, a movement route, an expected arrival time, a congestion degree, and the like, may be received. Provided to the mobile terminal 200 through the transmission and reception antenna (Ch B2) of the 102.

The method of transmitting location information of a terminal in a wireless communication system using a gateway having a plurality of antennas according to an embodiment of the present invention having the above-described configuration will be described below.

4 is a flowchart illustrating a process of estimating a position of a terminal in a wireless communication system using a gateway having a plurality of antennas according to an embodiment of the present invention. The initial position estimation process is shown.

3 and 4, the mobile terminal 200 sequentially scans channels of received signals (Ch A1 → Ch A2 → Ch A3 → Ch A4) to detect RSSI of each channel (S401). The RSSI of the channel is compared to determine the channel with the largest RSSI (S402).

Next, after repeating S401 and S402 for a predetermined number of times (for example, ten times) (S403), it is determined whether the channel having the largest RSSI is the same for the set number of times (S404).

As a result of the determination in S404, if the channel having the largest RSSI is the same for a predetermined number of times, authentication information of the terminal is transmitted to the gateway 102 of the corresponding channel. As a result of the determination in S404, if it is not the same, the process proceeds again from the channel scan process S401.

Next, when the gateway 102 receiving the authentication information of the terminal transmits the authentication information of the terminal to the central server, the received central server recognizes Z2 where the corresponding gateway is located as the current location of the mobile terminal, and thus the location information of the terminal. Process (S406).

As described above, according to the present embodiment, a channel having the largest RSSI among the plurality of gateways is detected to determine a gateway located closest to the portable terminal, and the authentication information of the portable terminal is transmitted through a transmission / reception channel of the corresponding gateway. Since the position of the portable terminal is estimated, the position estimation error with respect to the portable terminal can be reduced.

5 and 6 illustrate a process of transmitting location information of a terminal in a wireless communication system using a gateway having a plurality of antennas, according to another embodiment of the present invention. 6 is a conceptual diagram illustrating the process of FIG. 5.

3 and 5, S501 to S505 identify a gateway closest to the mobile terminal, which is the same as S401 to S405 illustrated in FIG. 4. That is, the mobile terminal 200 sequentially scans the channels of the received signals at predetermined intervals (Ch A1-> Ch A2-> Ch A3-> Ch A4), detects RSSI of each channel (S501), and compares the detected RSSIs. The RSSI determines the channel Ch A2 of the largest signal (S502), and then repeats the channel determination process (S501 and S502) for a predetermined number of times (S503). It is determined whether the channel with the largest RSSI is the same for a predetermined number of times (S504). If the RSSI is the same, the authentication information of the mobile terminal is transmitted to the gateway 102 of the channel with the largest RSSI (S505). Otherwise, the channel scanning process is performed (S501). Back to

Through the above steps S501 to S505, the mobile terminal transmits its authentication information to the channel having the largest RSSI, and then scans the channel again every predetermined period to detect the RSSI of each channel (S506), and the channel having the largest RSSI. The gateway of is determined as the nearest gateway (S507).

Next, it is determined whether the gateway determined in S507 is the same as the gateway that last transmitted the location information (S508).

As a result of the determination in S508, if it is not the same, the authentication information of the mobile terminal is transmitted to the corresponding gateway (S509). If it is determined that the same, it is determined whether the same gateway is repeated a predetermined number of times (S510).

As a result of the determination of S510, if the same gate is repeated more than a predetermined number of times, the authentication information of the portable terminal is retransmitted to the corresponding gateway (S509), otherwise, the channel scan process is performed again (S506). That is, if the gateway that has transmitted the signal with the largest RSSI is the same as the existing one, the authentication information of the portable terminal is transmitted when a new gateway is searched without transmitting the authentication information of the portable terminal. This is to reduce the load on the transmission / reception channel of the gateway by not transmitting the signal of the mobile terminal to the gateway for a predetermined number of times when the mobile terminal stays in the existing location. In addition, if the same gateway is continuously searched for a predetermined number of times or more, the authentication information of the mobile terminal is retransmitted to the corresponding gateway to determine whether the mobile terminal is turned off (power off), or where the mobile terminal does not receive a gateway signal (for example, Allow the central server to determine if the gateway has moved to a location where no gateway has been deployed.

The above-described process of FIG. 5 may be illustrated as shown in FIG. 6. FIG. 6 illustrates a process of transmitting location information signals between the mobile terminal and the gateway when the mobile terminal 200 of FIG. 3 moves to Z2 immediately after entering Z1 and staying at Z2 for a predetermined time.

3, 5, and 6, when the mobile terminal 200 enters Z1 (the current position of the mobile terminal), the signals broadcast through a transmission-only antenna are received from the plurality of gateways 101 and 104. . The portable terminal 200 detects and compares the RSSI of each channel through a channel scan. At this time, since the RSSI of the gateway 101 channel located in Z1 is detected highest, the portable terminal 200 authenticates the portable terminal with the channel Ch B1 of the corresponding gateway. Send the information.

Next, when the mobile terminal entering Z1 moves to Z2 immediately and the current position of the mobile terminal reaches Z2, the RSSI of the channel of the gateway 102 located in Z2 is detected highest during the next channel scan. Since it is not the same as the gateway 101 that sent the signal last, the authentication information of the mobile terminal is transmitted through the channel Ch B2 of the gateway 102.

Next, when the portable terminal stays at Z2 for a predetermined time, the RSSI of the channel of the gateway 102 located in Z2 is detected highest during the channel scan for a predetermined number of times, but the gateway 102 which finally sent the signal as a result of the determination at step S509. Since it is the same as the above, the authentication information of the mobile terminal is not transmitted to the channel Ch B2 of the corresponding gateway 102.

Next, if the same gateway 102 is repeated for a preset number of times (for example, four times in the present embodiment) by repeating the processes S506 to S509 (S510), the same gateway 102 is carried on the channel Ch B2 of the corresponding gateway 102. Send the authentication information of the terminal.

Next, when the mobile terminal moves from Z2 to Z3, the RSSI of the channel of the gateway 103 located in Z3 is detected highest at the next channel scan, and as a result of the determination at step S509, the gateway 102 that finally sent the signal. Since it is not the same, authentication information of the mobile terminal is transmitted through the channel Ch B3 of the gateway 103.

As described above, according to the present embodiment, when the mobile terminal is located in the same area for a predetermined time, communication of the dual-use antenna of the gateway is not performed by transmitting the information signal including the authentication information of the mobile terminal to the corresponding gateway. Overload can be reduced.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. Accordingly, the scope of the present invention should be construed as being limited to the embodiments described, and it is intended that the scope of the present invention encompasses not only the following claims, but also equivalents thereto.

1: Information signal transmission system using a gateway having a plurality of antennas
100: gateway 120, 130: antenna
201, 202, 203, 204: wireless communication device 210: control unit
220: communication unit 221: transmission unit
222: receiver 300: central server

Claims

In the method of estimating the position of the terminal in a wireless communication system using a plurality of gateways,
(a) detecting a received signal strength (RSSI) of each channel by scanning channels of the received signals from the plurality of gateways in the terminal, and then determining a channel having the largest RSSI;
(b) transmitting, by the terminal, authentication information of the terminal to a gateway of a channel having the largest RSSI;
(c) processing the location of the gateway of the channel with the largest RSSI as the current location of the terminal in the central server receiving the authentication information of the terminal through the gateway of the channel with the largest RSSI. Position estimation method of the terminal.

The method of claim 1, wherein the step (a) is performed such that the channel having the largest RSSI is repeated for a predetermined number of times.

The method of claim 1 or 2, wherein each of the plurality of gateways
And a plurality of antennas including at least a transmission-only antenna and a transmission / reception antenna.

The method of claim 3, wherein each of the plurality of gateways
The method of estimating position of a terminal, characterized in that the transmit-only antennas have the same channels between the transmit-only antennas and the transmit / receive antennas have the same channel.

The gateway of claim 3, wherein each of the gateways disposed adjacent to each other among the plurality of gateways includes:
The method of estimating the position of a terminal, characterized in that the transmit-only antennas have different channels between the transmit-only antennas and the transmit / receive antennas.

In the method of transmitting location information of a terminal in a wireless communication system using a plurality of gateways,
(A) detecting a received signal strength (RSSI) of each channel by scanning channels of received signals transmitted from the plurality of gateways in the terminal, and then determining a channel having the largest RSSI;
(B) transmitting the authentication information of the terminal to the gateway of the channel with the largest RSSI;
(C) the terminal rescans the channels of the received signals transmitted from the plurality of gateways to detect the received signal strength (RSSI) of each channel, and then determines the gateway of the channel having the largest RSSI as the gateway closest to the terminal. Process of doing;
(D) determining whether the gateway determined to be closest to the terminal in step (C) is the same as the gateway that received authentication information of the terminal in step (B);
(E) if the gateway of step (C) and the gateway of step (D) are not the same, as a result of the determination of step (D), transmitting authentication information of the terminal to a corresponding gateway; Method of transmitting location information of a terminal.

According to claim 6, (F) As a result of the determination of the step (D), if the gateway of the step (C) and the gateway of the step (D) is the same until the corresponding gateway is repeated for a predetermined number of times (C) And transmitting the authentication information of the terminal to the corresponding gateway after repeating the process) and step (D).

The method of claim 6 or 7, wherein each of the plurality of gateways
And a plurality of antennas including at least a transmit-only antenna and a transmit / receive antenna.

The method of claim 8, wherein each of the plurality of gateways
A transmission-only antenna is a transmission-only antennas, the transmitting and receiving antennas, the transmitting and receiving antennas have the same channel with each other, characterized in that the location information transmission method of the terminal.

The method of claim 8, wherein each of the plurality of gateways disposed adjacent to each other is
A transmission-only antenna is a transmission-only antennas, the transmitting and receiving antennas have a mutually different channel between the transmitting and receiving antennas, characterized in that the location information transmission method of the terminal.

A plurality of gateways including a transmission-only antenna and a transmission / reception antenna, transmitting a broadcasting signal including its own location information through the transmission-only antenna, and transmitting and receiving a signal through the transmission / reception antenna;
A user terminal scanning a channel of received signals transmitted from a plurality of gateways to detect received signal strength (RSSI) of each channel, and then transmitting authentication information of the terminal to a gateway of a channel having the largest RSSI;
And a central server configured to determine a location of the user terminal through authentication information of the user terminal received from the gateway and location information of the gateway.

The method of claim 11, wherein each of the plurality of gateways
Position identification system comprising a transmission-only antenna and a transmission and reception antenna.

The method of claim 12, wherein each of the plurality of gateways
Transmission-only antenna is a position-recognition system, characterized in that the transmission-only antennas, the transmitting and receiving antennas have the same channel between the transmitting and receiving antennas.

The method of claim 12, wherein each of the plurality of gateways disposed adjacent to each other are
A transmission-only antenna is a position-recognition system, characterized in that the transmission-only antennas, the transmitting and receiving antennas have different channels between the transmitting and receiving antennas.