Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
  • H04W52/02—Power saving arrangements
  • H04W52/0209—Power saving arrangements in terminal devices
  • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
  • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/59—Responders; Transponders
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
  • H04B1/40—Circuits
  • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
  • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
  • Y02D30/00—Reducing energy consumption in communication networks
  • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

• the present invention relates to an apparatus for preventing the illegal leakage of information through a mobile terminal, which can selectively restrict a plurality of functions of a mobile terminal in specific places or at arbitrarily designated locations.
• Unfavorable side effects of mobile terminals may cause social chaos, and deteriorate the positive aspects of a country having great power in information and communication technology at the same time if the unfavorable side effects are not prevented.
• it is required to develop an apparatus for preventing the illegal leakage of information through a mobile terminal.
• the apparatus for preventing the illegal leakage of information through a mobile terminal must restrict communication carefully when restricting communication because the freedom of communication must be legally secured for everyone. Therefore, in order to prevent someone acting in good faith from suffering, the problem of leaked radio waves must be solved using entrance and exit signal generators so that the apparatus is applied only to mobile terminals located in a place requiring restriction. Further, a function selection button must be provided in an indoor signal generator so that only a function for which control is required is selected from among a plurality of functions of a mobile terminal, and is then executed.
• a mobile terminal must be allowed to immediately ring using a ringer mode, regardless of a phone call, so that whether a user is holding a mobile terminal can be easily determined, and a mobile terminal holder must know in advance that some of the functions of the mobile terminal are restricted.
• the apparatus must be operable merely by turning a switch on, and must be mounted on the ceiling, wall or chest of drawers of a place of installation, regardless of whether the apparatus is hidden or exposed.
• the apparatus must be inexpensively produced, so that a burden on a user and a mobile terminal production company can be minimized.
• S/W software
• Such a radio wave blocker cannot be illegally used, and the SAV method is not open to the public and cannot be exactly known, however, the following problems have been predicted.
• a mobile phone located in an outdoor region may also be influenced by leaked radio waves, the time required for preliminary operation for mode switching is lengthened, which deteriorates usefulness in image blocking, and it is doubtful whether a mobile phone is operated in a designated mode when entering a talk state. Further, a function similar to a repeater is required, and the cost is increased, so that the burden on a user may be increased. Disclosure of Invention Technical Problem
• an object of the present invention is to provide an apparatus, which allows indoor, entrance and exit signal generators to transmit signals in a Time Division Multiplexing (TDM) manner at a single frequency, thus achieving a technology that prevents damage caused by leaked radio waves and further widening an operating region while causing mutual interference, which configures entrance, exit and mode signals in the form of certain patterns and transmits the configured signals, so that a valid pattern, in which a wireless receiver is turned off most of time and is intermittently turned on, is detected, and a corresponding mode is switched, thus minimizing the consumption of battery power, which automatically converts a signal tone into vibration, so that the transmission of data is prevented at the same time that phone calls are allowed, thus preventing cheating from occurring in various types of tests, which prohibits illegal photographing, storage and transmission using a camera, thus preventing information from being illegally leaked, and preventing undesirable effects of disturbing classes, business, etc.
• TDM Time Division Multiplexing
• the apparatus of the present invention comprises an indoor signal generator for transmitting a mode signal within a control place, an entrance signal generator for transmitting an entrance signal inside an entrance, an exit signal generator for generating an exit signal outside the entrance, and a mobile terminal including therein a wireless receiver for receiving and detecting the above signals, and automatically switching an operation mode.
• the apparatus of the present invention described above is constructed so that an indoor signal generator is installed in a designated region or place, entrance and exit signal generators are installed at an entrance, generated signals are detected by a wireless receiver, and a mobile terminal controller automatically switches a mode depending on the detected signals.
• modes for normal vibration switching, reception vibration switching, phone call interruption, image blocking, data transmission prohibition and normal operation can be selected according to the circumstances, so that a minimum set of functions is restricted, thus realizing unique advantages, such as technically preventing noise pollution and the illegal leakage of important information in advance.
• the apparatus of the present invention is advantageous in that it prevents errors from occurring in the reception of signals, eliminates failure in performing functions, and minimizes the consumption of battery power.
• the present invention can be predicted to have advantages in that it implements a ringer mode to easily determine whether a user is holding a mobile phone, and notifies a mobile phone holder that some functions are restricted, in that it prohibits text messages and Internet access using a mobile terminal, and also prohibits data transmission, and in that it can prevent the misuse or abuse of a mobile terminal in such a way that normal persons are prevented from illegally photographing high- ranking officials or celebrities and abusing the photographs thereof.
• FlG. 1 is a block diagram of an apparatus according to the present invention.
• FlG. 2 is a view showing the configuration of an entrance signal, an exit signal and a mode signal generated according to the present invention
• FlG. 3 is a block diagram of a signal generator according to the present invention.
• FlG. 4 is a view showing the relationship between the outputs of the entrance signal, the exit signal and the mode signal versus time according to the present invention
• FlG. 5 is a view showing the configuration of a detailed signal pattern when only a mode signal exists according to the present invention
• FlG. 6 is a block diagram of a mobile terminal having therein a wireless receiver according to the present invention
• FlG. 7 is a flowchart of a signal search process executed by a controller in the mobile terminal according to the present invention
• FlG. 8 is a block diagram of another mobile terminal having a separate controller according to the present invention
• FIG. 9 is a conceptual view showing the division of an entrance signal transmission region when a plurality of transmission antennas is installed on a single entrance signal generator according to the present invention.
• FlG. 10 is a timing chart showing the temporal configuration of entrance signals generated when a plurality of entrance signal generators is applied to the present invention;
• FlG. 11 is a block diagram of a signal generator having a plurality of entrance signal generators according to the present invention.
• FlG. 12 is a view showing an example of the configuration of a signal pattern when the signal generator has the plurality of entrance signal generators according to the present invention.
• FlG. 13 is a flowchart of a process based on the signal search and operation modes of a mobile terminal according to the present invention.
• FlG. 14 is a photograph for the replacement of a drawing of an actual product of an indoor signal generator according to the present invention.
• FlG. 15 is a photograph for the replacement of a drawing of an actual product of a wireless receiver mounted in a mobile terminal according to the present invention. Best Mode for Carrying Out the Invention
• the basic construction of an apparatus according to the present invention includes an indoor signal generator 10, an entrance signal generator 20, an exit signal generator 30, and a mobile terminal 50 having a wireless receiver 40 therein.
• Operation mode signals transmitted from the indoor signal generator 10 installed in an indoor region, include mode signals for normal vibration switching, reception vibration switching, phone call interruption, data transmission prohibition, image blocking, ringer and normal operation, and a combined mode signal, in which the above modes are mixed (for example: image blocking and data transmission prohibition mode).
• a signal transmitted from the entrance signal generator 20 is a signal indicating entrance
• a signal transmitted from the exit signal generator 30 is a signal indicating exit.
• the wireless receiver 40 detects each mode signal, and transmits the detected mode signal to the controller of the mobile terminal.
• the controller is constructed so that it normally operates when an entrance signal is not received even if a mode signal has been received, operates depending on respective signals only when the entrance and mode signals are received, and normally operates even if a mode signal is received after the exit signal has been received, thus preventing a mobile terminal, located in a place other than a designated installation place, from being influenced by the indoor signal generator. Further, if the entrance, exit and mode signals coexist simultaneously, mutual interference may be caused, so that the signals are transmitted in a Time Division Multiplexing (TDM) manner, thus avoiding mutual interference therebetween.
• TDM Time Division Multiplexing
• each of the entrance, exit and mode signals is transmitted for a T period (for example: 40ms) at each time slot, and each signal interval is composed of a synchronization signal (start signal), a guard signal (low), a code signal (entrance, exit or mode), and a stop signal (low).
• start signal a synchronization signal
• guard signal a guard signal
• code signal an instruction signal
• stop signal a stop signal
• FIG. 3 illustrates the construction of a signal generator.
• keys, input through a key input unit 11, require unique input keys for respective operation modes.
• a controller 12 receives a signal from the key input unit 11, displays a currently received mode on a display unit 13, and separately transmits respective signals in a TDM manner so as to avoid mutual interference between the entrance, exit and mode signals (refer to FIG. 4). This transmission scheme is shown in FIG. 2.
• the mode signal output from the controller 12 is digitally modulated by a digital modulation unit 14, the digitally modulated signal is converted into a Radio Frequency (RF) signal by an RF conversion unit 15, and the RF signal is amplified by an RF amplification unit 16. Further, an attenuator 17 is provided to adjust output power depending on the area of an installation place. The range of attenuation is adjusted by a switch unit 18 and, thus, RF power to be transmitted through an antenna 19 is controlled.
• RF Radio Frequency
• each of the entrance signal and the exit signal, output from the controller 12 is generated as an RF signal through a digital modulation unit 21 or 31, an RF conversion unit 22 or 32, an RF amplification unit 23 or 33, an attenuator 24 or 34, a switch unit 25 or 35, and an antenna 26 or 36, and the intensity of output power is also adjusted.
• the code of the mode signal is differently output depending on whether entrance and exit checking is performed. Accordingly, if entrance and exit checking is not performed, mode switching must be performed immediately when the mode signal is received, whereas if entrance and exit checking is performed, mode switching must be performed only when the mode signal is received after the entrance signal has been received. Further, the synchronization and code signals have certain patterns so that the wireless receiver is turned off for a certain period of time and is intermittently turned on to conduct a search operation, as shown in FTG. 2.
• the synchronization signal and the code signal are defined as 5-bit codes, and certain bit patterns are caused to be repeated.
• the rule for obtaining the bit patterns is described below.
• a bit pattern 110 is obtained when inversion occurs between neighboring bits as in the case of 1 from 0 or 0 from 1, a bit pattern 01 is obtained when neighboring bits, which are not inverted, are 0, and a bit pattern 10 is obtained when neighboring bits, which are not inverted, are 1.
• bit patterns are obtained in such a way that the first bit of a 5-bit code is assumed to be 0, the number of consecutive Is in a bit pattern is limited to 2, 1 is added when the last bit terminates at 0, and 0 is added to achieve 16 bits.
• 10100 is taken as an example of an exit signal, which is a 5-bit code
• inversion from 0 to 1 occurs initially, so that 110 is obtained.
• the bit is inverted from 1 to 0, so that 110 is obtained.
• the bit is also inverted from 0 to 1, so that 110 is also obtained.
• the bit is also inverted from 1 to 0, so that 110 is also obtained.
• Fifth 0 appears without being inverted, so that 01 is obtained. Because the last bit is 0, 1 is added, and thus 1101101101101 is obtained. Then, Os are added, and consequently a 16-bit code of 1101101101101000 is obtained.
• a synchronization signal in which 1 and 0 are alternated, is used, and 11 is inserted into a bit pattern at one time while 1 and 0 are repeated, so that mode signals are identified depending on the location at which 11 is inserted. Further, entrance and exit signals are configured to cause both 11 and 00 to appear at one time, and are identified depending on the locations at which 11 and 00 are inserted.
• Mode signals, required when entrance and exit checking is performed are obtained by inverting mode signals required when entrance and exit checking is performed. In this way, the number of Is in the synchronization signal, the entrance signal and the exit signal is reduced by half of the number of total bits (16 bits). In the mode signal required when entrance and exit checking is performed, the number of Is in a total of 16 bits is 9, whereas, in the mode signal required when entrance and exit checking is not performed, the number of Os in a total of 16 bits is 9.
• the wireless receiver can search for a required bit pattern for a short period of time.
• the mobile terminal of the present invention includes a wireless receiver 41 for receiving radio waves from the entrance, exit and indoor signal generators, a power supply unit 42 for supplying operating power to the wireless receiver, a mobile terminal controller 51 for processing input signals received from respective signal generators through the wireless receiver, and a mobile terminal circuit 52 for receiving control signals of respective signal generators, which have been processed by the mobile terminal controller, and restricting the operation of the mobile terminal.
• the mobile terminal having the above construction first searches for a required bit pattern, searches for a mode signal if the required bit pattern is found, and enters a corresponding mode.
• the power of the wireless receiver 41 is turned on or off through the power supply unit 42. If the synchronization and code signals having certain patterns are transmitted by the indoor, entrance and exit signal generators, the wireless receiver is turned off for a certain period Toff (for example: 0.5 to 1 second), and is turned on for a short period Ton (for example: 20 to 40ms) to search for a pattern. If the corresponding pattern is not found, the wireless receiver is turned off for the certain period Toff, whereas if the corresponding pattern is found, the operation of searching for a synchronization signal is performed.
• Toff for example: 0.5 to 1 second
• Ton for example: 20 to 40ms
• the process proceeds to a Sleep 1 operation of causing the wireless receiver to be turned off for the certain period Toff, whereas if the synchronization signal is found, a code signal (entrance, exit or mode signal) is searched for, and a current mode is switched to a corresponding mode. Thereafter, the process proceeds to a Sleep2 operation of causing the wireless receiver to be turned off for the certain period Toff, thus repeating the above operation of causing the wireless receiver to be turned on for the short period Ton and to search for a synchronization signal.
• the flow of this process is shown in FIG. 7.
• the wireless receiver is turned off for a long period Toff, and is turned on for a short period Ton, thus reducing the consumption of battery power.
• Icc,off is current flowing during the OFF period
• the mobile terminal controller turns on or off the power of the wireless receiver and searches for a certain pattern and the synchronization and code signals while performing a mobile terminal function, an overload may be imposed on the mobile terminal controller.
• a separate small controller for example: 8 pin microcontroller
• 8 pin microcontroller is provided to detect a mode while turning on or off the power of the wireless receiver, and to transmit the detected mode to the mobile terminal controller. This structure is shown in FIG. 8.
• a controller 43 turns off the power of the wireless receiver through the power supply unit 42 for the certain period Toff, and supplies the power to the wireless receiver for the short period Ton, thus reducing the consumption of battery power. Further, for the period Ton during which the power is supplied, if the wireless receiver detects the signal received from the antenna and outputs the detected signal, the controller 43, having received the signal, examines a bit pattern, searches for synchronization and code signals, determines whether a current mode is an operation mode, transmits the operation mode to the mobile terminal controller 51, thus allowing the mobile terminal controller to be switched to a corresponding mode.
• an entrance signal (refer to FIG. 2) is configured again to be separately transmitted in a TDM manner (refer to FIG. 10), so that a single entrance signal interval is divided into three intervals, that is, entrance signals 1, 2, and 3, and each entrance signal is transmitted for a period of T/3.
• Respective entrance signals 1, 2 and 3 are signals having the same code, and having different transmission time points.
• the controller 12 of the signal generator causes the entrance signal to be divided into entrance signals 1, 2 and 3 and to be separately output.
• FIG. 12 shows the case where the entrance signals 1, 2 and 3 are alternately transmitted for respective entrance signal intervals that are T periods.
• the entrance signal 1, an exit signal, and a mode signal are transmitted.
• the entrance signal 2, the exit signal and the mode signal are transmitted.
• the entrance signal 3, the exit signal, and the mode signal are transmitted. Thereafter, the method returns to the initial stage and the entrance signal 1, the exit signal, and the mode signal are transmitted.
• the exit signal can be transmitted in the same method as the entrance signal.
• the exit signal generator since the exit signal generator is placed in the external path of the installation place, the power of the exit signal can be increased in consideration of the characteristics of the installation place, so there is no big problem.
• the same method that is used by the entrance signal generator can be adopted.
• the mobile terminal controller turns off the wireless receiver for a certain period
• the process proceeds to a Sleep 1 operation, in which the wireless receiver is turned off for the certain period Toff, whereas if the valid pattern is found, the mobile terminal controller searches for a synchronization signal and proceeds to a code examination procedure.
• the current mode is a normal vibration switching mode. If the current mode is found to be the normal vibration switching mode, a ringer mode is switched to a vibration mode while enabling phone calls. Further, whether the current mode is a reception vibration switching mode is determined. If the current mode is found to be the reception vibration switching mode, the input of a microphone is blocked while a ringer mode is switched to a vibration mode, thus enabling listening to an opposite party's voice, but preventing a caller's voice from being transmitted. Through the manipulation of keys, the caller transmits messages, such as "yes", “No", or "I'm listening", and only listens to the opposite party's voice.
• the mobile terminal controller interrupts the power of the mobile terminal and performs the operation of basically stopping all of the functions of the mobile terminal, such as phone calls and data transmission. Whether the current mode is a data transmission prohibition mode is determined. If the current mode is found to be the data transmission prohibition mode, the mobile terminal controller interrupts Internet access and enables phone calls while prohibiting the transmission/reception of text messages and data using the mobile terminal.
• the mobile terminal controller prohibits the photographing, storage and transmission of images using a camera, but enables phone calls. Whether the current mode is a ringer mode is determined. If the current mode is found to be the ringer mode, the mobile terminal controller sounds a ring immediately or for a certain period of time (for example: for 5 seconds) regardless of phone calls. Whether a current mode is a combined mode (image blocking and data transmission prohibition mode) is determined.
• the mobile terminal controller prohibits the photographing, storage, transmission of images, and interrupts data transmission using text messages and Internet access using the mobile terminal in a public place requiring security, thus prohibiting inconsiderate TV watching and mobile game playing, as well as data transmission, but enabling phone calls.
• a current mode is a normal operation mode is determined. If the current mode is found to be the normal operation mode, the mobile terminal controller allows all of the functions of the mobile terminal to be normally performed. This mode is used when normal operation is temporarily required in the installation place (for example: a break between test periods, an intermission between performances in a concert, etc.).
• the process proceeds to a Sleep2 operation, in which the wireless receiver is turned off for the certain period Toff. After the certain period Toff has elapsed, the wireless receiver is shortly turned on for the period Ton, and proceeds to the operation of examining a synchronization signal, thus repeating the above operations. Accordingly, the wireless receiver is turned off for a long period, and is intermittently turned on, thus remarkably reducing the consumption of battery power of the mobile terminal.
• a portable signal generator In order for a person to carry the above-described indoor signal generator, a portable signal generator is developed to selectively operate only a required function from among the operation modes when traveling, and is then used to protect the person's privacy. At this time, the portable signal generator is operated using a battery.
• FIG. 14 is a photograph for the replacement of the drawing of an actual product of the indoor signal generator according to the present invention
• FIG. 15 is a photograph for the replacement of the drawing of an actual product of the wireless receiver mounted in the mobile terminal according to the present invention.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Telephone Function (AREA)
• Mobile Radio Communication Systems (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36740759

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (4)

• 2005
  • 2005-01-31 KR KR1020050008601A patent/KR100762926B1/ko not_active IP Right Cessation
• 2006
  • 2006-01-25 WO PCT/KR2006/000288 patent/WO2006080803A1/en active Application Filing

Patent Citations (4)

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