KR101724628B1 - A nearfield wireless communication module for supporting ultra short distances and a method for operating it - Google Patents

Abstract

A short range wireless communication module according to an embodiment of the present invention includes a sensing distance reduction unit that processes a wireless signal transmitted / received by a short range wireless communication module to reduce a sensing distance of the terminal unit; A wireless communication unit for processing a signal output from the sensing distance reducing unit according to a predetermined protocol; And a controller for detecting a terminal device located within the detection distance from the protocol processed signal.

Description

TECHNICAL FIELD [0001] The present invention relates to a short-range wireless communication module and a method for operating the wireless communication module,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a short-range wireless communication module and an operation method thereof, and more particularly, to a short-range wireless communication module and a method of operating the same.

In general, wired or wireless (or radio) communication modules are used for connection between communication equipments.

If the communication module is wired, it is required to connect the communication module to the modem (or all equivalent peripherals) via a communication cable, and then connect the modem to a dedicated connector connected to the communication network, for example an Ethernet connector ). This requires a lot of work for the above connection, which is time consuming and troublesome.

On the other hand, when the communication module is wireless, it is generally performed by connecting the communication module to a cellular network or a wireless LAN (WLAN, Wi-Fi, 802.11) or WiMAX. However, in this case, since the access point of the wireless communication network may be relatively far away from the terminal device connected thereto, an electromagnetic wave environment using relatively high power is provided to support a sufficient distance including a close range or a long distance.

However, in such a current near-field or long-distance communication environment, a plurality of terminals perform wireless communication using strong electromagnetic waves through various wireless networks, and in order to support a wider range of communication chips providing communication modules, .

However, due to the high performance of such wireless communication, mutual noise and crosstalk are likely to occur in inter-device communication. In particular, in order to establish communication with a specific terminal located in the near vicinity, a connection setting and a power control for a short-distance one-to-one wireless communication between the devices are required, while the current operating environment of the communication module is more and more distant To the terminal to support the terminal.

Accordingly, the present operating environment of the communication module not only hinders the short-range communication between the terminals, but also makes it difficult to exclude the unauthorized third party from unauthorized access, and there is a problem that the substantial security of the mutual connection between the terminals can not be maintained .

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a short range wireless communication module capable of supporting a short distance secure communication between a device excluding a noise exposure and an approach of another terminal, And a method of operation.

According to an aspect of the present invention, there is provided a near field wireless communication module including: a detection distance reduction unit that processes a radio signal transmitted / received by a near field communication module to reduce a sensing distance of the terminal; A wireless communication unit for processing a signal output from the sensing distance reducing unit according to a predetermined protocol; And a controller for detecting a terminal device located within the detection distance from the protocol processed signal.

According to another aspect of the present invention, there is provided a near field wireless communication module including: a detection distance reduction unit configured to limit a wireless detection distance of a terminal device; And a wireless communication unit for processing a radio signal transmitted / received by the short-range wireless communication module according to a predetermined protocol and for measuring a received signal strength received from a nearby terminal device, Is located within the wireless sensing distance, and acquires device information of the terminal device through communication with the terminal device when the wireless sensing distance is within the wireless sensing distance.

According to another aspect of the present invention, there is provided a method of operating a short range wireless communication module, including: receiving a wireless signal; Processing the radio signal to reduce the sensing distance of the terminal device; Processing the signal output according to the detection distance reduction according to a predetermined protocol; And detecting a terminal device located within the sensing distance from the protocol processed signal.

According to another aspect of the present invention, there is provided a method of operating a short range wireless communication module, the method comprising: setting a wireless detection distance of a terminal unit; Processing a radio signal transmitted and received by the short-range wireless communication module according to a predetermined protocol; Measuring a received signal strength received from a terminal device located in the vicinity; Determining from the received signal strength whether the terminal device is located within the wireless sensing distance; And acquiring device information of the terminal device through communication with the terminal device when the terminal device is located within the wireless sensing distance.

According to another aspect of the present invention, there is provided a method of reproducing a program for executing the method in a computer.

According to the embodiment of the present invention, by providing the sensing distance reducing unit that reduces the sensing distance of the wireless communication unit included in the near field wireless communication module, even if the existing communication module is used, exposure of external noise during the near- A short range wireless communication module supporting an ultra short distance communication between devices and an operation method thereof can be provided.

1 is a conceptual illustration of a system according to an embodiment of the present invention.
2 is a block diagram illustrating a configuration of a short-range wireless communication module according to an embodiment of the present invention.
3 is a diagram illustrating a configuration of a detection distance reducing unit for controlling transmission power according to an embodiment of the present invention.
4 to 8 are diagrams illustrating a configuration and an implementation method of the detection distance reduction unit for performing filtering processing according to an embodiment of the present invention.
9 to 10 are views showing a configuration of a sensing distance reduction unit including a termination circuit according to an embodiment of the present invention.
11 is a diagram illustrating a configuration of a sensing distance reduction unit configured as a shield according to an embodiment of the present invention.
12 is a block diagram illustrating a configuration of a short-range wireless communication module according to another embodiment of the present invention.
13 is a flowchart illustrating an operation of the short-range wireless communication module according to an embodiment of the present invention.
14 to 15 are ladder diagrams illustrating secure communication between a terminal device and a local area communication device equipped with a local area wireless communication module according to an embodiment of the present invention.
16 shows an authentication process of a terminal device equipped with a short-range wireless communication module according to an embodiment of the present invention.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, only intended for the purpose of enabling understanding of the concepts of the present invention, and are not to be construed as limited to such specifically recited embodiments and conditions do.

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of the currently known equivalents as well as the equivalents to be developed in the future, i.e., the structure.

Thus, it should be understood that all flow diagrams, state transitions, pseudo code, etc. are representative of various processes that may be substantially represented on a computer-readable medium and executed by a computer or processor, whether the computer or processor is explicitly shown .

The functions of the various elements shown in the figures, including the functional blocks depicted in the processor or similar concept, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

First, the terms used in the specification of the present invention will be briefly defined, and then an embodiment of the present invention will be described.

A wireless communication dongle, a mobile phone, a smart phone, a laptop computer, a notebook computer, a notebook computer, a notebook computer, a notebook computer, (PDA), a portable multimedia player (PMP), navigation, and the like. However, the present invention is not limited thereto and may include various devices capable of user input and information display.

1 is a conceptual illustration of a system according to an embodiment of the present invention.

1, a wireless communication system according to an embodiment of the present invention includes one or more terminal devices 100A, 100B, and 100C, and each of the terminal devices 100A, 100B, A short range wireless communication module according to an embodiment may be included.

One terminal 100A of each of the terminal devices 100A, 100B, and 100C according to the embodiment of the present invention can perform super short-range communication with the other terminal devices 100B. Here, the nearest neighbor may mean a distance reduced from the distance of the existing short distance communication module. For example, in the embodiment of the present invention, the short-range communication between the terminal devices 100A and 100B initiating communication can be performed only within a range between several CMs and several tens CMs such as 30CM.

For example, as shown in FIG. 1, a specific terminal device 100A can start communication with another terminal device 100B located within 30 CM. However, the communication range of the specific terminal device 100A may be limited so that communication with another terminal device 100C is restricted when the 30CM is removed.

Various components and operation methods according to the embodiment of the present invention can be applied to the recognition range restriction or the detection range reduction of the wireless communication module for the ultra close range communication of the specific terminal device 100A.

The local area communication module according to the embodiment of the present invention can be applied to various security communication between the terminal devices including the local communication module. In particular, each system-specific encryption can be performed according to the operation of the local communication module according to the embodiment of the present invention. Accordingly, the short-range communication module according to the embodiment of the present invention can be applied to a door sensor system, a payment system according to FIN TECH, There are advantages to be applied to the system.

For example, the terminal device 100A including the short-range wireless communication module can be installed in the store. When the user holds the other terminal device 100B and visits the store, the terminal device 100A is located within the sensing area It is possible to detect only the device, and thereby perform super close range communication with the other terminal device 100B.

For this purpose, the short-range wireless communication module according to the embodiment of the present invention can be implemented by various short-range wireless communication devices that generate or receive a wireless signal. In addition, the wireless signal may include various types of short range wireless communication signals. For example, the wireless signal transmitted and received by the short-range wireless communication module may include at least one of an RF signal, a magnetic field signal, an ultrasound signal, and an infrared signal.

In addition, a communication method conforming to the Bluetooth Low Energy (BLE) standard may be used as a typical example of a wireless signal for short-range wireless communication. Bluetooth low energy is a wireless communication protocol used to transmit messages to low energy, the BLE specification is defined in Volume 6 of the Bluetooth Specification, and Version 4.0 was published on June 30, 2010. This Bluetooth low energy operates at 2.4GHz ISM band (2400-2483.5MHz), which is a short wavelength wireless transmission frequency, and uses 40 RF channels of 2MHz in that range. In addition, Bluetooth low energy can use a radio technology called a frequency-hopping spread spectrum in which the data to be transmitted is chopped and the chunk transferred over the other channels. In addition, the Bluetooth low energy transmission can have a transmission range of approximately 50 m, a data rate of 1 Mb / s, and a power consumption of 1% to 50% compared to conventional Bluetooth.

Meanwhile, each of the terminal devices 100A, 100B, and 100C may be configured such that a communication module is installed so that a communication network can be connected to an authentication server, a wired network, a mobile communication network, or the Internet network and interconnected through a communication network connection. Here, the communication module for the external communication network connection of each of the terminal devices 100A, 100B, and 100C may be integrally formed with the short-range wireless communication module for short-range wireless communication, or may be independently provided.

2 is a block diagram illustrating a configuration of a short-range wireless communication module according to an embodiment of the present invention.

2, the short range wireless communication module 100 may include a controller 110, a wireless communication unit 120, and a sensing distance reduction unit 130. [

The controller 110 generally controls the operation of each element and the execution of functions for the operation of the short-range wireless communication module 100. For example, the control unit 110 may be implemented as a processor for controlling all or a part of the wireless communication function, or a program for executing the processor.

The wireless communication unit 120 enables wireless communication between the local wireless communication module 100 and the wireless communication system including the mobile communication network or the Internet network or between the local wireless communication module 100 and other terminal devices located within a short distance One or more communication modules.

In addition, the wireless communication unit 120 may include a modem for encoding and modulating the transmitted signal, demodulating and decoding the received signal, and an RF front end for processing the RF signal. The wireless communication unit 120 may selectively include an antenna for transmitting and receiving an RF signal.

For example, the wireless communication unit 120 may include a wired / wireless communication module for wirelessly or wiredly communicating with a local area network (LAN) and an Internet network, a USB interface for communicating via a USB (Universal Serial Bus) A mobile communication module for connecting to and communicating with a mobile communication network according to various mobile communication standards such as 3G, 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) , Bluetooth low energy, Wi-Fi, and the like.

The detection distance reduction unit 130 may include one or more physical or software configurations for reducing the wireless sensing distance of the wireless communication unit 120 to form a near-near wireless communication environment.

To this end, the detection distance reduction unit 130 may include one or more filters to be connected to an antenna end of the wireless communication unit 120, a termination circuit, a shielding unit, or a software module.

Accordingly, the wireless communication unit 120 can identify other terminal devices located in a short-range range with a reduced sensing distance in the sensing distance reducing unit 130, Crosstalk caused by noise, data hacking by a third party, and the like can be prevented in advance.

More specifically, the wireless communication unit 120 transmits identification information corresponding to the other terminal device only when another terminal device in which the close range communication function is activated is located within a short distance in accordance with the reduced sensing distance in the detection distance reducing unit 130 .

In order to search for the terminal device, the wireless communication unit 120 may process a signal output from the sensing distance reducing unit according to a predetermined protocol according to a communication protocol.

For example, the wireless communication unit 120 can broadcast identification information of itself through a packet according to each state, and establishes a secure connection with the terminal apparatus that has received the broadcasting packet, Can be obtained.

Accordingly, the terminal device having the connection with the short-range wireless communication module 100 can be determined to be located at a short distance from the terminal device including the short-range wireless communication module 100, for example, within a few tens of CMs. ) Can determine that the terminal device has accessed the location where the short-range wireless communication module 100 is installed or within a short distance, and can perform an appropriate operation such as door opening, payment processing, user authentication, etc. .

3 is a diagram illustrating a configuration of a detection distance reducing unit for controlling transmission power according to an embodiment of the present invention.

3, the detection distance reduction unit 130 includes a transmission signal processing unit 134, a transmission gain controller 135, a reception signal processing unit 136, and a reception gain controller 137 And it is possible to provide a near-near sensing function according to minimization of transmission and reception power.

The transmission signal processing unit 134 acquires the radio signal processed by the communication protocol from the radio communication unit 120 under the control of the controller 110 and controls the power adjustment based on the gain value provided from the transmission gain controller 135. [ To the outside.

The transmission gain controller 135 can control the gain of the amplifier based on the gain value under the control of the controller 110. [ In particular, the transmission gain controller 135 may control the gain to a gain value that minimizes the transmission power of the radio signal according to an embodiment of the present invention.

For example, the control unit 110 may control to minimize the transmission gain value corresponding to the predetermined second near-field mode setting, and accordingly, the transmission gain controller 135 may control the transmission gain of the transmission signal processing unit 134 It can be controlled to be applied to the connected amplifier.

In addition, the reception signal processing unit 136 receives the power-adjusted radio signal from the outside based on the gain value provided from the reception gain controller 137, and provides the radio signal obtained through the signal processing to the radio communication unit 120 can do.

The reception gain controller 137 can control the gain of the amplifier based on the gain value under the control of the controller 110. [ In particular, the receive gain controller 137 may control the gain to a gain value that minimizes the received power of the received radio signal according to an embodiment of the present invention.

For example, the control unit 110 may control to minimize the reception gain value corresponding to the predetermined second near-field mode setting, and accordingly, the reception gain controller 137 controls the reception signal processing unit 136 It can be controlled to be applied to the connected amplifier.

In accordance with the control of the control unit 110, the wireless communication unit 120 can acquire the wireless signal received from the reception signal processing unit and can perform communication protocol processing. The control unit 110 controls the wireless communication unit 120 based on the communication protocol- Appropriate operation can be performed.

4 to 8 are diagrams illustrating a configuration and an implementation method of the detection distance reduction unit for performing filtering processing according to an embodiment of the present invention.

According to an embodiment of the present invention, the detection distance reduction unit 130 may include one or more filters. The one or more filters may include one or more filter circuits for physically reducing the sensing distance of the wireless signal through the filtering process of the wireless signal transmitted / received between the wireless communication unit 120 and the antenna 121. [

4, the detection distance reduction unit 130 includes a band pass filter (BPF) 131, a band cut filter (BRF) 132, and an impedance matching unit (IM) 133, The sequential change of the wireless transmission signal passing through the section 133 is shown at the bottom.

As shown in FIG. 4, the band-pass filter 131 may include one or more circuit elements for improving the quality of a radio signal by passing only radio signals of a predetermined specific band. For example, the bandpass filter 131 may comprise one or more circuits for passing only radio signals corresponding to the RF band (2.4 GHz to 2.4835 GHz) signal specified in the Bluetooth standard. The signal having passed through the bandpass filter 131 may be transmitted to the bandpass filter 132.

In addition, the band-stop filter 131 may include one or more circuit elements for reducing the transmit / receive sensitivity by removing all or a part of the radio signal of the predetermined band. For example, the band-pass filter 132 may include one or more circuit elements for reducing the transmit / receive sensitivity by removing a portion of the radio signal corresponding to the RF band (2.4 GHz to 2.4835 GHz) signal specified in the Bluetooth standard have. The signal having passed through the band-stop filter 132 may be transmitted to the impedance matching unit 133.

The impedance matching unit 133 may include one or more circuit elements for minimizing the impedance difference between the antenna 121 and the RF chip unit of the wireless communication unit 120. Accordingly, the impedance matching unit 133 can minimize the loss of the wireless signal reduced by the sensing distance reducing unit 130. The impedance matching unit 133 may be implemented by, for example, a quarterwave transformer or by a stub matching circuit, and may be implemented simply as an LC lumped element.

With such a configuration, the wireless signal sensing distance of the wireless communication unit 120 according to the embodiment of the present invention can be reduced by the sensing distance reducing unit 130 and smooth communication can be maintained.

5 to 8, the filter constituting the detection distance reducing unit 130 according to the embodiment of the present invention may be implemented by various elements.

As shown in FIG. 5, the detection distance reduction unit 130 according to the embodiment of the present invention may be implemented as an LRC Lumped circuit. For example, the band-pass filter 131 may be implemented as a combination of L, R, and C elements as shown in FIG. 5, and may have a frequency corresponding to a specific region It is possible to pass the band. It may also be implemented as a band-stop filter 132, depending on the implementation of the LRC Lumped circuit. In this case, it is possible to operate at a frequency of 2 to 3 GHz or less, and it is easy to implement on a PCB because it is implemented as a basic device.

6, the filter of the detection distance reduction unit 130 of the present invention may be implemented as a transmission line filter. 6 illustrates transmission line filters of the detection distance reduction unit 130 according to an embodiment of the present invention.

When the radio signal is several GHz or more, it may be difficult to implement the device using the LRC circuit shown in FIG. 5, and precise control may be difficult. Accordingly, the filter of the detection distance reduction unit 130 according to the embodiment of the present invention can be implemented as a transmission line filter.

The transmission line filter of the detection distance reduction unit 130 may perform band pass filtering or band pass filtering of the radio signal passing through the transmission line using the line coupling, the resonance effect on the line, and the multi- Can be performed.

To this end, the transmission line filter of the detection distance reduction unit 130 may include a microstrip line or a stripline line filter. 6A illustrates a microstrip LPF of the sensing distance reducing unit 130 according to an embodiment of the present invention. In FIG. 6B, the sensing distance reducing unit 130 according to the embodiment of the present invention Microstrip BPF is illustrated.

7, the filter of the detection distance reduction unit 130 of the present invention may be implemented as a ceramic filter.

A ceramic filter is a structural filter that uses resonance along the wavelength, and can be a compact filter implemented by reducing the electrical wavelength of the signal using a dielectric ceramic of high dielectric constant. In addition, the ceramic filter of the detection distance reducing unit 130 may include a comb-line type unit wavelength resonator.

For example, the detection distance reduction unit 130 may be implemented by connecting separate comb-lines one by one, and may be implemented by a monoblock method implemented by one dielectric block as shown in FIG. 7 (A) . Also, as shown in FIG. 7 (B), the sensing distance reduction unit 130 may be implemented as a ceramic chip filter that is formed using a multilayer pattern in a ceramic. Accordingly, the detection distance reduction unit 130 may include a resonator that implements a band-pass filter.

Meanwhile, as shown in FIG. 8, the filter of the detection distance reducing unit 130 according to the embodiment of the present invention may be implemented by a SAW (SURFACE ACOUSTIC WAVE) filter.

The SAW filter is a compact, lightweight, and thin filter that can be implemented in a smaller size than an LC filter or a ceramic filter if the same performance is achieved. The SAW filter uses a characteristic that a surface acoustic wave is generated when a comb-like electrode is arranged on a surface of a piezoelectric substance so that only a specific frequency synchronized with the elastic wave frequency is passed and the remaining frequency is attenuated.

Accordingly, when the structure of the detection distance reducing unit 130 is relatively small, the SAW filter having a sharp skirt characteristic as compared with the small structure performs the operation of the band pass filter 131 or the band cut filter 132 .

9 to 10 are views showing a configuration of a sensing distance reduction unit including a termination circuit according to an embodiment of the present invention.

9 to 10, the detection distance reduction unit 130 according to an embodiment of the present invention may include a termination circuit 138 for reducing the detection distance. The termination circuit 138 may be implemented through an L, R, C circuit as shown in FIG. 10, or may be implemented as an RF 50 ohm chip terminator. Also, in this case, since the antenna 121 of the wireless communication unit 120 is removed, the detection distance of the wireless signal can be physically minimized.

11 is a diagram illustrating a configuration of a sensing distance reduction unit configured as a shield according to an embodiment of the present invention.

According to an embodiment of the present invention, the detection distance reduction unit 130 may include a shielding unit 139. The shielding unit 139 may surround the RF processing unit 122 of the wireless communication unit 120 and may include a metal shield structure for shielding the wireless signal. A plurality of holes may be provided in the metal shield structure so that only a part of the signal radiated from the RF processor 122 can be transmitted and received. Accordingly, the sensing distance reduction unit 130 can reduce the transmission / reception sensitivity of the wireless communication unit 120 at a fundamental level.

12 is a block diagram illustrating a configuration of a short-range wireless communication module according to another embodiment of the present invention.

12, the detection distance reduction unit 130 of the short range wireless communication module 100 according to the embodiment of the present invention may be implemented as a software module in the control unit 110. [

In this case, the detection distance reducing unit 130 may include one or more software modules for measuring the distance from the surrounding terminal devices under the control of the controller 110, and performing communication only when the distance is within a predetermined distance .

For this, the controller 110 may measure the distance to the terminal using the intensity of the radio waves with other terminals sensed by the wireless communication unit 120, and may correspond to the sensing distance set through the sensing distance reducing unit 130 The detection distance reduction according to the embodiment of the present invention can be realized in software by initiating the connection only when it is within the propagation intensity.

More specifically, the control unit 110 may initiate a connection with a terminal device located in the near vicinity based on an RSSI (RECEIVE SIGNAL STRENGTH INDICATION) signal. The RSSI is a result of measuring the received RF signal with electric power. It can be seen that the larger the RSSI, the closer the distance is.

Accordingly, the controller 110 calibrates the reference RSSI value for each distance and stores it in advance in the detection distance reducing unit 130. If the terminal that exceeds the RSSI value corresponding to the detection distance set in the detection distance reducing unit 130 is identified , It can determine that the terminal is within the detection distance.

The RSSI calibration table preset in the detection distance reduction unit 130 may be illustrated as follows.

Estimated distance F RSSI 10CM -20 15CM -23 20CM -25 25CM -28 30CM -30 40CM -32 50CM -35

13 is a flowchart illustrating an operation of the short-range wireless communication module according to an embodiment of the present invention.

The near field wireless communication module 100 according to the embodiment of the present invention can estimate the distance according to the RSSI measurement of the received signal and can determine whether the nearby terminal device is within the detection distance.

To this end, the short range wireless communication module 100 sets the sensing distance through the sensing distance reducing unit 130 (S101).

Then, the short-range wireless communication module 100 acquires ref_RSSI, which is a reference value corresponding to the sensing distance, through the sensing distance reducing unit 130 (S103).

Then, the controller 110 of the short-range wireless communication module 100 compares rx_RSSI of the received signal received through the wireless communication unit 120 with the ref_RSSI (S105). If the rx_RSSI is greater than the ref_RSSI, (S107).

If the distance is within the sensing distance, the controller 110 of the short-range wireless communication module 100 starts connection with the terminal device within the sensing distance to acquire device information (S111). Here, the device information may include identification information of a terminal device located within the detection distance.

In order to initiate such communication, the wireless communication unit 120 may transmit a link state state, an advertising state, a scanning state, and an initiating state according to a short- And a link layer state of a connection state. The controller 110 transmits a packet according to each mode, receives a wireless signal corresponding thereto, and transmits the RSSI Can be compared.

The standby state may be a state in which packets are not transmitted and received and may be ready for entry in both an advertisement state, a scanning state, a start state, and a connection state.

An advertising state may be a state of broadcasting advertising channel packets and optionally listening to and responding to a response triggered from the ad channel packet. Here, the advertisement state can be entered in the idle state, and the device in the advertisement state can be referred to as an advertiser.

A scanning state may be a state in which an advertisement channel packet is received from an advertiser, a scanning state may be entered in a waiting state, and a device in a scanning state may be referred to as a scanner.

The initiating state can be entered in a waiting state, with the advertising channel packet being received from the specific device and in response to the ad channel packet to initiate the connection with the other device, May be referred to as an initiator.

The connection state can enter the advertisement state and the start state, and the device that enters the connection state from the start state performs the role of master, and the device that enters the connection state in the advertisement state is the slave ) Can play the role of.

Here, the wireless communication unit 120 may be implemented to be capable of only the advertising state described above in order to achieve optimum low energy. In this case, the wireless communication unit 120 may broadcast advertisement channel packets within a short distance through the detection distance reducing unit 130. [

The identification information of the terminal device included in the device information may include address information for identifying each of the plurality of devices. The address information may include at least one of a public address and a random address. Here, the public address may be a MAC address including a company_assigned field and a company_id field, and an arbitrary address may be a randomly formed address including a hash field and a random field.

A plurality of terminal devices capable of short-range wireless communication can receive the advertisement message when they are located within a short-range transmission range of the short-range wireless communication module 100. A device not located within the transmission range among a plurality of terminal devices capable of short-range wireless communication can not receive an advertisement message.

14 to 15 are ladder diagrams illustrating secure communication between a terminal device and a local area communication device equipped with a local area wireless communication module according to an embodiment of the present invention.

14 to 15, an apparatus including a short-range wireless communication module 100 according to an embodiment of the present invention includes a short range communication device 100D for sensing one or more terminal devices 100D located in a short distance, And mutual authentication between the terminal devices 100D can be performed.

In the mutual authentication, a token authentication method using a public key can be used. Accordingly, a public key for authentication in product production may be inserted into each local area communication device 100D, and a public key distributed from an external server may be included in the terminal device 100D. Therefore, connection can not be set in the case of an unauthenticated terminal.

Accordingly, each of the terminal device 100D and the short-range communication device 100D, which have transmitted and received the device information within the detection distance, performs the public key exchange first (S201).

Then, the terminal device 100D performs authentication confirmation using the received public key (S203), and generates random number information corresponding to the public key (S205).

Also, the short range communication device 100D performs authentication confirmation using the received public key (S207), and generates random number information corresponding to the public key (S209).

Accordingly, each of the terminal devices 100D and the local area communication device 100D exchanges generated random numbers (S211).

Then, the random number confirmation process (S213) in the terminal device 100D and the random number confirmation process in the short range communication device 100D can proceed (S215).

Subsequently, the terminal device 100D and the short-range communication device 100D exchange the connection information according to completion of the authentication based on the random number confirmation of each of the terminal device 100D and the short-range communication device 100D (S217).

The connection information may include, for example, information for ACL link establishment. ACL (ASYNCHRONOUS CONNECTIONLESS) link is a transmission method for transmitting and receiving information for data communication. ACL data packet can include 72Bit Access Code, 54Bit Packer header, payload, and 16Bit CRC code. Depending on the amount of data to be transmitted, May be included.

The terminal device 100D and the local area communication device 100D then perform communication port setting according to the RFCOMM protocol (S219), start a connection according to the communication port setting, transmit and receive data according to mutual authentication (S221).

15, the short range communication device 100D including the short-range wireless communication module 100 preferentially processes communication with a terminal that is first connected when a plurality of terminal devices located in the vicinity exist So that interference of other apparatuses can be eliminated.

FIG. 15 illustrates operations therefor. The short range communication device 100D first broadcasts a first request message and a second request message to the first terminal device 100F and the second terminal device 100G, respectively S301, S303). Each request message may include a broadcasting packet of an INQUIRY signal.

Then, the short-range communication device 100D receives the first response message from the second terminal device 100G (S305) and thereafter receives the second response message from the first terminal device 100F (S307 ).

In this case, the short-range communication device 100D ignores the subsequently received second response message (S309), and starts the connection with the second terminal device 100G based on the first response message received (S311 ).

Accordingly, the short-range communication device 100D including the short-range communication module 100 can form a link by searching only one specific terminal device within a detection area (for example, about 30 cm). Accordingly, the device search is limited, and connection of other terminal devices can be blocked when a specific connection is established.

Accordingly, since a single LINK according to a single trial is formed, it is possible to prevent a physical probe in advance and rapid pairing by token authentication is established between the short range communication device 100D and the terminal device, One-to-one connection becomes possible.

16 shows an authentication process of a terminal device equipped with a short-range wireless communication module according to an embodiment of the present invention.

Referring to FIG. 16, the terminal apparatus 100D performs an unauthorized transaction due to illegal copying of an application corresponding to each module of the short-range communication apparatus 100D according to the embodiment of the present invention through authentication with the authentication server 200 .

A data encryption key (DATA ENCRYPTED KEY) may be used for this purpose. In FIG. 16, a method of being generated in the authentication server 200 and downloaded to the terminal device 100D is illustrated. However, And a method of registering in the authentication server 200 may be applied to the present invention. The data encryption key may be stored in a separate secure storage space, and thus a copy prevention and leakage prevention process may be performed.

To this end, the terminal device 100D first confirms whether the data encryption key exists (S401), and if registration is necessary, transmits the registration request to the authentication server 200 (S403).

Thereafter, the authentication server 200 generates a data encryption key DEK corresponding to the terminal device 100D according to the registration request (S405), and transmits the data encryption key (DEK) to the terminal device 100D (407).

Then, the terminal device 100D stores the data encryption key in a predetermined security area (S409). When a user authentication request is generated (S411), the terminal device 100D transmits the encrypted authentication information to the authentication server 200 (S413).

Here, the authentication information may include a user ID, a device number, and other encrypted information.

Thereafter, the authentication server 200 confirms the authentication information (S415), and transmits an authentication confirmation message to the terminal device 100D upon completion of the authentication. Here, the authentication confirmation message may include at least one of payment information or OTC authentication request.

The operations of the short range communication device 100D and the terminal devices 100E, 100F and 100G may be performed in conjunction with the wireless communication unit 120 under the control of the controller 110, Near-field signal based on the sensing distance set through the sensing distance reducing unit 130 according to the detected distance.

In accordance with the configuration and operation according to the embodiment of the present invention, the terminal devices including the short-range communication module 100 and the short-range communication device register a public key for forming a plurality of tokens corresponding to each module And final authentication may be established by registering each data encryption key.

In addition, according to the embodiment of the present invention, data security for each module can be formed, and it can be applied to various fields such as access management, parking management, and FINTECH which require a near-near security communication.

The method according to the present invention may be implemented as a program for execution on a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include a ROM, a RAM, a CD- , Floppy disks, optical data storage devices, and the like.

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes and code segments for implementing the above method can be easily inferred by programmers of the technical field to which the present invention belongs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims (14)

A short range wireless communication module,
A detection distance reduction unit for processing a radio signal transmitted / received by the short distance wireless communication module to reduce the detection distance of the terminal apparatus;
A wireless communication unit for processing a signal output from the sensing distance reducing unit according to a predetermined protocol; And
And a control unit for detecting a terminal device located within the detection distance from the protocol processed signal
The wireless signal uses a communication scheme conforming to the Bluetooth standard,
The sensing distance reducing unit
And at least one filter for reducing the sensing distance through filtering of the radio signal,
The sensing distance reducing unit
A band pass filter for passing a required band signal of the radio signal; And
And a band-stop filter for blocking the required band signal for reducing the sensitivity of transmission and reception of the radio signal,
The bandpass filter
One or more circuits for passing only radio signals corresponding to the RF band (2.4 GHz to 2.4835 GHz) signal specified in the Bluetooth standard,
The band-
Includes at least one circuit element for reducing transmit / receive sensitivity by removing a portion of a radio signal corresponding to an RF band (2.4 GHz to 2.4835 GHz) signal specified in the Bluetooth standard
Short-range wireless communication module. The method according to claim 1,
The sensing distance reducing unit
And a reception gain controller for minimizing a gain power of a reception signal under the control of the control unit
Short-range wireless communication module. delete delete The method according to claim 1,
The sensing distance reducing unit
And an impedance matching unit for matching a signal impedance difference between the antenna for receiving the radio signal and the radio communication unit
Short-range wireless communication module. The method according to claim 1,
The sensing distance reducing unit
And a termination circuit for terminating the RF signal output from the wireless communication unit
Short-range wireless communication module. The method according to claim 1,
The sensing distance reducing unit
And a shielding unit for shielding an RF circuit connected to the wireless communication unit to adjust a radiation amount of the wireless signal
Short-range wireless communication module. delete 8. The method of claim 1 or 7,
The wireless communication unit
The terminal device is connected to a secure communication channel through at least one of a public key exchange and a random number exchange with the terminal device
Short-range wireless communication module. 8. The method of claim 1 or 7,
The control unit
A request message for acquiring device information is transmitted to a plurality of terminal apparatuses via the wireless communication unit, and when one or more response messages corresponding thereto are received, the terminal apparatus that has transmitted the initial response message is prioritized to start a secure connection
Short-range wireless communication module. 8. The method of claim 1 or 7,
The control unit
And an authentication server connected to the wireless communication unit to receive the data encryption key, and transmits the device information encrypted with the data encryption key to the server according to an authentication request from the outside
Short-range wireless communication module. A method of operating a short range wireless communication module,
Receiving a wireless signal;
Processing the radio signal to reduce the sensing distance of the terminal device;
Processing the signal output according to the detection distance reduction according to a predetermined protocol; And
Detecting a terminal device located within the detection distance from the protocol processed signal
The wireless signal uses a communication scheme conforming to the Bluetooth standard,
The step of reducing the sensing distance comprises:
And at least one filter for reducing the sensing distance through the filtering of the radio signal,
A band pass filter for passing a required band signal of the radio signal; And
And a band-stop filter for blocking the required band signal for reducing the sensitivity of transmission and reception of the radio signal,
The bandpass filter
One or more circuits for passing only radio signals corresponding to the RF band (2.4 GHz to 2.4835 GHz) signal specified in the Bluetooth standard,
The band-
Includes at least one circuit element for reducing transmit / receive sensitivity by removing a portion of a radio signal corresponding to an RF band (2.4 GHz to 2.4835 GHz) signal specified in the Bluetooth standard
A method of operating a short range wireless communication module. delete 13. A recording medium on which a program for causing a computer to execute the method of claim 12 is recorded.

Images