KR101034496B1 - Method and device for communication between communication devices with enhanced security - Google Patents

Abstract

PURPOSE: A communication method with an enhanced security is provided to perform communication between licensed or unlicensed devices using a specific frequency band which is allowed by a base station. CONSTITUTION: A first communication unit(220) transmits the frequency use right request message to a base station. A first communication unit receives information about the specific frequency which is given by the base station. A communication device management unit(240) manages a plurality of unlicensed devices which is capable of performing communication with licensed devices. A second communication unit(230) offers information about the specific frequency to the unlicensed device.

Description

Enhanced communication method and device between communication devices {METHOD AND DEVICE FOR COMMUNICATION BETWEEN COMMUNICATION DEVICES WITH ENHANCED SECURITY}

The present invention relates to a method and apparatus for enhanced security between communication devices, and more particularly, to a method or device for which an authorized device pays a fee and uses a specific frequency authorized by a base station. A method and apparatus capable of performing data communication between unauthorized devices.

In the frequency bands, there are licensed frequency bands that the general user must pay for and use the frequency usage rights, and unlicensed frequency bands that can be used free of charge without receiving a separate license from the government.

Examples of the applied band frequencies include frequency bands assigned to mobile carriers. As the second generation mobile communication frequency band, SKT telecommunications company has 800Mhz band, KTF and LGT telecommunications company have 1.8GHZ band, and the third generation mobile communication frequency band SKT, KTF and LGT have been licensed by the government. It grants permission to use.

As an unlicensed frequency band, an ISM band (Industrial Scientific Medical band) may be mentioned. Currently, 900 MHZ, 2.4 GHz and 5.7 GHz bands are used as common ISM bands worldwide.

In the case of licensed equipment using licensed band frequencies, communication can be performed smoothly without collision between each other because they pay for and use different frequencies.

However, communication devices using unlicensed bands are limited to the unlicensed bandwidth and frequencies are not assigned to specific devices. Therefore, if more devices using unlicensed band frequencies are used in a region, collisions may occur. This makes communication impossible.

In addition, when the unlicensed band frequency is used, the frequency is disclosed, which is vulnerable to security.

In order to solve the problem in the communication environment using the unlicensed band frequency, a technique capable of using the licensed band frequency in communication with the unlicensed device is required.

In order to solve the problems of the prior art as described above, the present invention can perform data communication between an authorized device and an unlicensed device or an unlicensed device by using a specific frequency that an authorized device pays and is authorized by a base station. We would like to propose a method and apparatus.

According to a preferred embodiment of the present invention for achieving the above object, in a communication method of an authorized device using a frequency and paying a base station, recognizing at least one unauthorized device that can communicate with the authorized device ; Receiving usage rights for a specific frequency from the base station; Transmitting the information about the specific frequency to the unauthorized device; And performing data communication with the unauthorized device by using the specific frequency.

According to another embodiment of the present invention, there is provided a communication method of an authorized device that pays a base station and uses a frequency, the method comprising: recognizing a plurality of unauthorized devices that can communicate with the authorized device; Receiving usage rights for a specific frequency from the base station; Transmitting the information about the specific frequency to the plurality of unauthorized devices; And performing data communication between the plurality of unlicensed devices using the specific frequency.

According to another aspect of the invention, the first communication unit for transmitting a frequency usage right request message to the base station and receiving information about a specific frequency authorized to use from the base station; A communication device manager for managing a plurality of unauthorized devices capable of communicating with an authorized device; And a second communication unit configured to provide information about the specific frequency to the unlicensed device and to perform data communication with the unlicensed device by using the specific frequency.

According to the present invention, by using a specific frequency that the licensed device pays and is authorized to use for communication between the licensed device and the unauthorized device or the unauthorized device, there is no frequency collision and security stable communication can be performed. There is an advantage.

1 is a conceptual diagram schematically showing the configuration of a communication system between various communication devices according to an embodiment of the present invention.
2 is a diagram illustrating a detailed configuration of an application device according to an embodiment of the present invention.
3 is a diagram illustrating a detailed configuration of a base station according to an embodiment of the present invention.
4 is a diagram illustrating a detailed configuration of an unauthorized device according to an embodiment of the present invention.
5 is a flowchart illustrating a preferred embodiment of a process for data communication between an authorized device and an unauthorized device according to the present invention.
6 is a flowchart illustrating an exemplary embodiment of a process of performing data communication between unauthorized devices according to the present invention.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals are used for like elements in describing each drawing.

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

1 is a conceptual diagram schematically showing the configuration of a communication system between various communication devices according to an embodiment of the present invention.

According to FIG. 1A, the communication system 100 includes a base station 110, authorized devices 120 and 122, and unauthorized devices 130.

The authorized device 120 is an authorized device that can communicate with the base station 110, and may include a conventional mobile phone, PDA, and smart phone.

The authorized device 120 may perform communication by paying a fee and receiving a right to use a specific frequency within the licensed band frequency from the base station.

The unlicensed device 130 is a communication device that performs communication in an unlicensed frequency band. The unlicensed device 130 includes various communication devices capable of performing wireless communication using an unlicensed frequency band such as a TV, a digital camera, a computer, a monitor, and a wireless speaker.

The authorized device 120 generally performs a communication function with another authorized device 122 by using a specific frequency after paying for a base station and receiving a right to use a specific frequency among licensed frequency bands.

Instead of using the specific frequency, which has received the use right, to communicate with another authorized device 122, the specific frequency may be used for communication with the unauthorized device 130.

For example, in an environment in which the authorized device 120 and the unauthorized device C 136 exist, data such as a picture or a video stored in the authorized device that is the authorized device 120 is to be displayed through the TV that is the unauthorized device C 136. In this case, communication between each other becomes necessary.

In this communication environment, when the authorized device 120 and the unlicensed device C 136 communicate using the unlicensed frequency band, a plurality of unlicensed devices 130 using many unlicensed frequency bands in a space where the two devices exist. The presence of) may make communication impossible due to frequency collisions with each other.

In addition, the unlicensed band frequency is an open frequency and is not a frequency allocated only to a specific user. If the data that the user wants to transmit in the communication with the unauthorized device 130 is important conference data, or the data of which privacy is important, a request for data communication through a specific frequency may occur even if the user pays a price.

Therefore, when the authorized device 120 communicates with the unauthorized device C 132 by using a specific frequency paid for by the base station, the stable communication is possible and the weak security problem may be solved.

Even from the mobile carrier's point of view, even when the user of the authorized device 120 does not communicate with another authorized device 120 by using a base station, the user may be authorized to use a specific frequency and charge a fee to create a new revenue structure. can do.

Referring to FIG. 1B, information about the specific frequency may be provided to the plurality of unauthorized devices 130 and used for data communication between the plurality of unauthorized devices 130 using the specific frequency.

For example, when the picture data in the camera is to be transmitted to a computer, the authorized device 120 transmits specific frequency information authorized by the base station to the unauthorized device A (camera) 132 and the unauthorized device B (computer) 134. ), The unauthorized device A (camera) 132 and the unauthorized device B (computer) 134 perform data communication through a specific frequency.

When data communication requiring security is required between a plurality of unauthorized devices 130 and a stable data communication is to be performed without interference by a frequency collision, the data communication as described above may be used.

Hereinafter, a system according to the present invention will be described in detail with reference to FIGS. 2 to 4.

2 is a diagram illustrating a detailed configuration of an application device according to an embodiment of the present invention.

As shown in FIG. 2, the authorized device 120 of the present invention includes a control unit 210, a first communication unit 220, a second communication unit 230, an unlicensed device manager 240, and a communication end determination unit 250. ) May be included.

The controller 210 detects the unauthorized device 130 that can communicate with the authorized device 120 in a manner in which the authorized device 120 receives a pilot signal from the unauthorized device 130, and the detected unauthorized device 130 is present. In this case, the first communication unit 220, the second communication unit 230, the unlicensed device manager 240, and the communication unit to communicate with the unauthorized device 130 through a specific frequency authorized by the base station 110. The end determination unit 250 is controlled.

The first communication unit 220 may include a frequency allocation requesting unit 222, an allocation frequency receiving unit 224, and a communication end transmitting unit 226.

The frequency allocation request unit 222 transmits a message requesting granting of frequency authority to the base station. When transmitting the message, the authorization device 120 may be in a call waiting state of a general mobile phone, and call reception from another authorization device may be restricted.

The assigned frequency receiver 224 receives specific frequency information allocated by the base station. When receiving the specific frequency information, the authorized device 120 may be in a call state of a general mobile phone, and a charge based on the specific frequency usage time may be charged from a mobile communication company.

The communication termination transmitter 226 transmits a message about the specific frequency to the base station when the communication termination determination unit 250 determines the termination of the use of the specific frequency.

The second communicator 230 may include a pilot signal receiver 232, an assigned frequency transmitter 234, a data communicator 236, and a communication device information transmitter 238.

The pilot signal receiver 232 periodically receives a pilot signal coming into the authorized device 120 from the unauthorized device 130.

There may be a distance limitation in the reception of the pilot signal, so that only the pilot signal of the unauthorized device 130 within a predetermined range from the authorized device 120 may be received.

The assigned frequency transmitter 234 transmits the information about the specific frequency to which the authorized device 120 has been given permission to use by the base station, to the unauthorized device 130.

When there are a plurality of unauthorized devices 130, the information about the frequency may be transmitted only to one of the unauthorized devices 130 of the plurality of unauthorized devices 130 according to a user's selection of the authorized device 120.

The unauthorized device 130 receives the information about the specific frequency and uses the specific frequency for communication with the authorized device 120.

The data communication unit 236 performs data communication with the unauthorized device 130 using the specific frequency.

When there are a plurality of unauthorized devices 130, the communication device information transmitting unit 238 may be configured to provide a plurality of unauthorized devices with respect to the information of the plurality of unauthorized devices 130 registered in the authorized device managed by the communication device manager 240. 130). This allows data communication between a plurality of unauthorized devices 130 using a specific frequency.

The communication device manager 240 manages at least one unauthorized device 130 that can communicate with the authorized device 120. When the pilot signal is received from the plurality of unauthorized devices 130, the unauthorized devices 130 are registered with the authorized device 120.

The unauthorized device 130 periodically transmits a pilot signal at a predetermined predetermined time, and when the authorized device 120 receives the pilot signal regardless of whether data is communicated with the authorized device 120, the unauthorized devices 130 are authorized. Registered with device 120.

The communication device manager 240 creates a list of the unauthorized devices 130 registered in the authorized device 120. When the pilot signal is not received from any one of the unauthorized devices 130 registered in the list at a predetermined time or when the communication end signal is received, the one of the unauthorized devices in the list ( Delete 130).

The user may select at least one unauthorized device 130 among the registered unauthorized devices 130 to transmit information on a specific frequency and perform data communication. Specifically, instead of transmitting specific frequency information to all registered unauthorized devices 130, the authorized device 120 selectively transmits specific frequency information to the unauthorized device 130 selected by the user and performs data communication. Can be.

The communication termination manager 250 manages whether data communication is terminated between the authorized device 120 and the unauthorized device 130 or between the plurality of unauthorized devices 130. Since the frequency used for data communication is a frequency that the authorized device 120 pays for and is authorized to use from the base station, the base station is notified of the termination of data communication using the specific frequency to prevent additional usage charges.

Whether or not the data communication is terminated may be determined by the user in the authorized device 120 whether or not to terminate the communication.

When the communication end signal is received from the unauthorized device 130 When there are a plurality of unauthorized devices 130 communicating with the authorized device, the data communication ends only when the communication end signal is received from all of the plurality of unauthorized devices 130. It can also be judged.

In addition, even when a pilot signal is no longer received from the authorized device 120 due to a deviation from the predetermined distance or the power-off of the unauthorized device 130, the communication termination manager 120 may not receive data between the unauthorized devices 130. It can be determined that the communication is terminated.

When the communication termination manager 250 determines that the communication is terminated, the controller 210 transmits a communication termination message to the base station through the communication termination transmitter 226.

3 is a diagram illustrating a detailed configuration of a base station according to an embodiment of the present invention.

As shown in FIG. 3, the base station 110 of the present invention may include a control unit 310, a communication unit 320, and a frequency management unit 330.

When the controller 310 receives the frequency permission request message from the authorization device 120, the controller 310 may allocate a specific frequency to grant permission to the authorization device 120 and transmit information about the specific frequency to the authorization device 120. The communication unit 320 and the frequency management unit 330 to control.

The communication unit 320 performs communication between the base station 110 and the authorized device 120. The communication unit 320 receives a frequency use authority request message from the authorized device 120, and transmits specific frequency information granted to the authorized device 120.

In addition, the communicator 320 receives a communication end message from the authorized device 120, and transmits the time for which the authorized device 120 uses a specific frequency or charge information on the use to the authorized device 120.

The frequency manager 330 may include a frequency allocator 332 and a charging processor 334.

The frequency allocating unit 332 allocates a specific frequency to give the authority to the authorized device 120. Frequency allocation is done within the licensed band range for each mobile carrier.

When a specific frequency is allocated as described above, the specific frequency may be set to a frequency being used by the base station 110 and may not be allocated for another authorized device 122.

The charging processor 334 manages a fee to be granted to the user of the authorized device 120 by the mobile communication company when the frequency assigning unit 332 grants the authorized device 120 permission to use a specific frequency.

The charging processing unit 334 may calculate a time for which the authorized device 120 uses a specific frequency, and may calculate a fee charged according to the used time. The fee charged as described above may vary according to the policy of the mobile carrier.

The specific frequency usage time may be determined as a time until the base station 110 transmits specific frequency information to which the frequency authority is granted to the authorized device 120 and receives a communication end signal from the authorized device 120.

4 is a diagram illustrating a detailed configuration of an unauthorized device according to an embodiment of the present invention.

As shown in FIG. 4, the unauthorized device 130 of the present invention may include a controller 410, a communication unit 420, a communication device manager 430, and a data communication unit 440.

The controller 410 periodically transmits a pilot signal so that the controller 410 can be registered and maintained in the authorized device 120, and receives specific frequency information to which the permission is granted from the authorized device 120 to transmit data to the authorized device 120. The communication unit 420 controls the communication unit 420, the communication device manager 430, the data communication unit 440, and the communication termination manager 450 to communicate data between the plurality of unauthorized devices 130.

The communicator 420 may include a pilot signal transmitter 422, an allocated frequency receiver 424, a communication device information receiver 426, and a communication end transmitter 428.

The pilot signal transmitter 422 periodically transmits a pilot signal that has been previously agreed upon when the unauthorized device 130 sets a mode for communication. An unauthorized device 130 having an authorized device 120 capable of receiving a pilot signal within a predetermined distance is registered with the authorized device 120.

The assigned frequency receiver 424 receives information about a specific frequency granted by the authorized device 120. Data communication with the authorized device 120 may be performed using the received specific frequency.

The communication device information manager 426 receives information about the unauthorized device 130 registered in the authorized device 120. There may be a plurality of unauthorized devices 130 registered in the authorized device 120, and data communication may be performed between a plurality of unauthorized devices 130 using a specific frequency to which use rights are granted. In order to perform such data communication, information about a plurality of unauthorized devices 130 registered in the authorized device 120 is received.

When the information on the non-popular devices registered in the authorized device 120 is updated, the received information is re-received. The user may select an unlicensed device for data communication from the list of unlicensed devices 130 registered in the authorized device 120 of the communication device information manager 426 and perform communication using a specific frequency.

The communication end transmitter 428 may apply a communication end signal when the communication end manager 450 determines the data communication between the authorized device 120 and the unauthorized device 130 or the data communication between the plurality of unauthorized devices 130. Send to 120.

The communication device manager 430 manages information of at least one unauthorized device 130 registered in the authorized device 120. Information of unauthorized devices 130 is generated and managed in a list.

The data communication unit 440 performs data communication by using a specific frequency that is granted a use right between the authorized device 120 and the unauthorized device 130 or between the plurality of unauthorized devices 130.

The communication end manager 450 determines whether the communication with the authorized device 120 is terminated or the data communication between the plurality of unauthorized devices 130 is terminated.

5 is a flowchart illustrating a preferred embodiment of a process for data communication between an authorized device and an unauthorized device according to the present invention.

Referring to FIG. 5, the unauthorized device 130 transmits a pilot signal to the authorized device 120 (step 510).

Upon receipt of the pilot signal, the unauthorized device 130 is registered with the authorized device 120 (step 515).

Authorizing device 120 transmits a frequency authorization request message to base station 110 (step 525).

The base station 110 assigns a specific frequency to grant the frequency authority to the authorized device 120 (step 530), and transmits specific frequency information to the authorized device 120 (step 535).

The base station 110 registers a specific frequency start time of use (step 540).

The authorized device 120 transmits the allocated specific frequency information to the unauthorized device 130 (step 545), and the unauthorized device 130 transmits an ACK response message to the authorized device 120 (step 550).

The authorized device 120 and the unauthorized device 130 perform data communication with each other using a specific frequency (step 555).

At the end of the data communication, the unlicensed device 130 transmits a communication end signal to the authorized device 120 (step 560). If the authorization device 120 determines whether to end the communication, step 560 may be omitted.

The authorized device 120 determines whether to end the data communication according to the communication end signal transmitted from the unauthorized device 130 or the user's selection (step 565).

When it is determined that the data communication is terminated, the authorized device 120 transmits a communication end signal to the base station 110 (step 570), and the base station 110 transmits a response message to the authorized device 120 to the end of the communication ( Step 575).

The base station 110 registers a specific frequency usage end time (step 580) and calculates a specific frequency usage fee for the total usage time (step 585).

Through the above process, data communication may be performed between the authorized device 120 and the unauthorized device 130 using a specific frequency. Steps 510 and 515 are only arranged in time series for explanation of the process of data communication, and are performed by periodically sending and receiving pilot signals regardless of subsequent steps.

6 is a flowchart illustrating an exemplary embodiment of a process of performing data communication between unauthorized devices according to the present invention.

Referring to FIG. 6, unlicensed devices A and B 132 and 134 transmit pilot signals to the authorized device 120 (steps 610 and 612).

Upon receiving the pilot signal, a list of unauthorized devices A and B 132 and 134 is generated and registered in the authorized device 120 (step 616).

Authorizing device 120 transmits a frequency authorization request message to base station 110 (step 622).

The base station 110 assigns a specific frequency to give the authorized device 120 a frequency right (step 624), and transmits specific frequency information to the authorized device 120 (step 626).

The base station 110 registers a specific frequency start start time (step 628).

The authorized device 120 transmits the allocated specific frequency information to the unauthorized devices A and B (132.134) (steps 630 and 632), and the unauthorized devices A and B (132.134) send respective ACK response messages to the authorized device 120. (Step 634, step 636).

The unauthorized device A 132 and the unauthorized device B 134 perform data communication with each other using a specific frequency (step 638).

At the end of the data communication, the unlicensed devices A and B 132 and 134 transmit a communication end signal to the authorized device 120 (step 640 and step 642).

The authorized device 120 determines whether to end data communication according to the communication end signal transmitted from the unauthorized devices A and B 132 and 134 or the user's selection (step 644).

When it is determined that the data communication is terminated, the authorized device 120 transmits a communication end signal to the base station 110 (step 646), and the base station 110 transmits a response message to the authorized device 120 to the end of the communication ( Step 648).

The base station 110 registers a specific frequency usage end time (step 650) and calculates a specific frequency usage fee for the total usage time (step 652).

Through the above process, data communication may be performed between the unauthorized device A 132 and the unauthorized device B 134 using a specific frequency. Steps 610 and 614 are only arranged in time series for explanation of the process of data communication, and are performed by periodically sending and receiving pilot signals regardless of subsequent steps.

Although the above has been described with reference to embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

110: base station 120: authorized equipment
122: authorized equipment
130: unauthorized device 132: unauthorized device A
134: unauthorized equipment B 136: unauthorized equipment C
138: unauthorized equipment D
210: control unit 220: first communication unit
222: frequency allocation request unit 224: allocation frequency receiving unit
226: communication end transmission unit
230: second communication unit 232: pilot signal receiving unit
234: allocation frequency transmission unit 236: data communication unit
238: communication device information transmission unit
240: communication device management unit 250: communication termination management unit
310: control unit 320: communication unit
330: frequency management unit 332: frequency allocation unit
334: billing processing unit
410: control unit 420: communication unit
422: pilot signal transmitter 424: assigned frequency receiver
426: communication device information receiving unit 428: communication termination transmission unit
430: communication device management unit 440: data communication unit
450: communication termination management unit

Claims (12)

In a communication method of an authorized device that pays a base station and uses a frequency,
Recognizing at least one unauthorized device capable of communicating with the authorized device;
Receiving usage rights for a specific frequency from the base station;
Transmitting the information about the specific frequency to the unauthorized device; And
And performing data communication with the unauthorized device using the specific frequency. The method of claim 1, wherein recognizing the unauthorized device comprises:
Periodically receiving a pilot signal from the unauthorized device;
Registering the unauthorized device; And
Deleting the unauthorized device registered to the authorized device when the pilot signal is not received from the unauthorized device at preset time intervals.
Security-enhanced communication method between the communication device further comprising a. The method of claim 1, wherein the step of receiving use rights for the specific frequency comprises:
Requesting a frequency usage right from the base station;
The base station assigning the specific frequency to be used in the authorized device; And
And receiving information on the specific frequency. The method of claim 1,
Transmitting a communication end signal to the base station at the end of data communication between the authorized device and the unauthorized device; And
Receiving a response message for communication termination processing from the base station
Security-enhanced communication method between the communication device further comprising a. The method of claim 4, wherein
The base station calculates the use time of the specific frequency based on the time at which the information on the specific frequency is transmitted and the time at which the communication end signal is received, and calculates the charge of the specific frequency according to the use time. A communication method for enhancing security between communication devices. In a communication method of an authorized device that pays a base station and uses a frequency,
Recognizing a plurality of unauthorized devices capable of communicating with the authorized device;
Receiving usage rights for a specific frequency from the base station;
Transmitting the information about the specific frequency to the plurality of unauthorized devices; And
And performing data communication between the plurality of unauthorized devices using the specific frequency. The method of claim 6, wherein recognizing the unauthorized device comprises:
Periodically receiving a pilot signal of each of the plurality of unauthorized devices from the plurality of unauthorized devices;
Registering the plurality of unauthorized devices;
Generating a list of the registered plurality of unauthorized devices and transmitting the list information to each of the plurality of unauthorized devices;
Deleting the unauthorized device from the list when the pilot signal of one of the plurality of unauthorized devices is not received every predetermined time; And
Retransmitting the list information to the unauthorized device in the list when the list information is updated.
Security-enhanced communication method between the communication device further comprising a. The method of claim 6, wherein the step of receiving use rights for the specific frequency comprises:
Requesting a frequency usage right from the base station;
The base station assigning a specific frequency to be used in the authorized device; And
And receiving information on the specific frequency. The method of claim 6,
Receiving from each of the unauthorized devices a data communication end message between the plurality of unauthorized devices;
Transmitting a communication termination signal to the base station when the communication termination message for all of the plurality of unauthorized devices is received; And
Receiving a response message for termination of communication from the base station
Security-enhanced communication method between the communication device further comprising a. The method of claim 9,
The base station calculates the usage time of the specific frequency based on the time of transmitting the information on the specific frequency and the time of receiving the communication end signal, and calculates the usage fee of the specific frequency according to the usage time. A communication method for enhancing security between communication devices. A first communication unit which transmits a frequency use right request message to a base station and receives information on a specific frequency to which use right is authorized from the base station;
A communication device manager for managing a plurality of unauthorized devices capable of communicating with an authorized device; And
And a second communication unit configured to provide information about the specific frequency to the unauthorized device and perform data communication with the unauthorized device using the specific frequency. The authorized device of claim 11, further comprising a communication end management unit configured to determine an end of data communication between the authorized device and the plurality of unauthorized devices or between the plurality of unauthorized devices.

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