GB2494300A - Transmission of a signal over a plurality of frequency bands - Google Patents

Transmission of a signal over a plurality of frequency bands Download PDF

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Publication number
GB2494300A
GB2494300A GB1215569.3A GB201215569A GB2494300A GB 2494300 A GB2494300 A GB 2494300A GB 201215569 A GB201215569 A GB 201215569A GB 2494300 A GB2494300 A GB 2494300A
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United Kingdom
Prior art keywords
signal
signals
target
text
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1215569.3A
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GB201215569D0 (en
Inventor
Seok Min Woo
Kyung Choon Park
Hyun Hak Kim
Jae Chan Lee
Sa Im Woo
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Samsung Electro Mechanics Co Ltd
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Samsung Electro Mechanics Co Ltd
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Publication of GB201215569D0 publication Critical patent/GB201215569D0/en
Publication of GB2494300A publication Critical patent/GB2494300A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12—Frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/04—Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • 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
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • 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

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

Abstract

The present invention relates to a wireless communication system including a first terminal 100 for modulating a target signal into a plurality of frequency signals of different bands to transmit the modulated signals as radio frequency (RF) signals and a second terminal 200 for detecting the target signals included in the plurality of frequency signals of different bands. The RF signals received from the first terminal are processed only when at least two of the detected target signals correspond to each other. The target signal may be a wake up command for a mobile device. By only acting on a signal when at least two signals correspond to each other reduces the likelihood of a mobile device powering on when interference is interpreted as a wake signal.

Description

TITLE OF THE INVENTION
WIRELESS COMMUNICATION SYSTEM AND METHOD FOR PROCESSING TARGET
SIGNAL USING THE WIRELESS COMMUNICATION SYSTEM
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to a wireless communication system and a method for processing a target signal using the wireless communication system.
2. Description of the Related Art
[00021 Radio frequency (RE) signals can transmit various data such as images, videos, sounds, and commands to a great distance without wires and recently are making rapid progress along with the development of related technologies.
[0003] Meanwhile, various mobile devices or small network equipment can transceive data between terminals by Wi-Fi, Bluetooth, and Zigbee systems corresponding to local area networks.
[0004] Especially, since the above small network systems usually use internal batteries to improve mobility, they are waiting in a sleep mode using only minimum power required for communication and activation to minimize power consumption when they don't particularly need to operate. The terminal is changed from a sleep mode to an active mode when receiving a wake-up signal from another terminal or a server and receives data such as a separate command in the active mode to process the received data.
[0005] Patent Document 1 relates to a method of reducing energy consumption in wireless networks and discloses a technology that a receiver, which periodically repeats a sleep mode and a wake-up mode, is changed into the wake-up mode when receiving a specific band signal in a wideband broadcast signal.
[0006] Meanwhile1 communication is performed in the small networks such as Wi-Fi, Bluetooth, and Zigbee by mainly using a 2.4 GHz band signal.
[0007] Therefore, when various devices perform communication in the same region, malfunction of the system frequently occurs due to increased signal interference.
[0008] Since the technology disclosed in the Patent Document 1 also uses only a specific frequency signal, it is not free from the malfunction of the system due to signal interference.
[0009] For example, when a Zigbee device Al receives a wake-up signal from a Zigbee control server AU, if a WLAN (wireless local area network) AP (access point) is positioned around the Zigbee device Al to transmit a signal, the Zigbee device Al may malfunction and thus be unnecessarily changed into a wake-up mode due to the signal transmitted from the WLANAP.
[0010] This malfunction due to signal interference has been pointed out as a problem that may commonly occur in transceiving various target signals as well as in converting between the sleep and wake-up modes.
RELATED PRIOR ART DOCUMENT
[0011] Patent Document 1: European Patent No. 1855493
SUMMARY OF THE INVENTION
[0012] The present invention has been invented in order to overcome the above-described problems and it is, therefore, an object of the present invention to provide a wireless communication system and a method for processing a target signal using the wireless communication system that are capable of preventing malfunction due to signal interference.
[0013] In accordance with one aspect of the present invention, there is provided a wireless communication system including: a first terminal for modulating a target signal into a plurality of frequency signals of different bands to transmit the modulated signals as RF signals; and a second terminal for detecting the target signals included in the plurality of frequency signals of different bands, from the RF signals received from the first terminal and processing the target signal when at least two of the detected target signals correspond to each other [0014] At this time, the first terminal may include a first control unit for generating the target signal; a first RF signal generating unit connected to the first control unit and modulating the target signal into a first band frequency to generate a first RF signal; a second RF signal generating unit connected to the first control unit and modulating the target signal into a second band frequency to generate a second RF signal; a coupler connected to the first RF signal generating unit and the second RE signal generating unit to couple the first RF signal and the second RF signal; and an antenna connected to the coupler.
[0015] Further, the first terminal may include a first control unit for generating the target signal; a first RF signal generating unit connected to the first control unit and modulating the target signal into a first band frequency to generate a first RF signal; a second RF signal generating unit connected to the first control unit and modulating the target signal into a second band frequency to generate a second RF signal; a first antenna connected to the first RE signal generating unit; and a second antenna connected to the second RE signal generating unit.
[0016] Meanwhile, the second terminal may include an antenna for receiving the RF signals; a distributor for distributing the received RF signals according to frequency bands; a plurality of signal detecting units for detecting the target signals from the respective RF signals distributed by the distributor; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.
[0017] Further, the second terminal may include a plurality of antennas for receiving the RF signals; a plurality of signal detecting units connected to the plurality of antennas, respectively, to detect the target signals from the respective RF signals; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.
[0018] Further, the second terminal may include an antenna for receiving the RE signals; a distributor for distributing the received RF signals according to frequency bands; a plurality of RF signal matbhing units connected to the distributor to remove noise from the respective RF signals; a plurality of signal detecting units for detecting the target signals from the respective RE signals passing through the RF signal matching units; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.
[00191 Eurther, the second terminal may include a plurality of antennas for receiving the RE signals; a plurality of RF signal matching units connected to the plurality of antennas, respectively, to remove noise from the respective RF signals; a plurality of signal detecting units connected to the RE signal matching units, respectively, to detect the target signals from the respective RF signals; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.
[0020] The target signal may be a signal for converting the second terminal from a minimum power mode (sleep mode) to an active mode (wake-up mode).
(00211 Further, the wireless communication system may further include, in the secOnd terminal, a plurality of comparing units connected to rear ends of the signal detecting units, respectively, to provide interrupt signals to the control unit when the detected signals are greater than preset reference signals.
[0022] At this time, the control unit may perform an operation according to the target signal when the plurality of interrupt signals are applied.
[0023] In accordance with another aspect of the present invention, there is provided a wireless communication system including: a first terminal including a first control unit for generating a target signal, a first RF signal generating unit connected to the first control unit and modulating the target signal into a first band frequency to generate a first RF signal, a second RF signal generating unit connected to the first control unit and modulating the target signal into a second band frequency to generate a second SF signal, a coupler connected to the first RF signal generating unit and the second RF signal generating unit to couple the first RF signal and the second RF signal, and a first antenna connected to the coupler; and a second terminal including a third antenna for receiving the RF signals transmitted from the first antenna; a distributor for distributing the received SF signals into the first SF signal and the second SF signal; a first RE signal matching unit for removing noise from the first RE signal; a second RE signal matching unit for removing noise from the second SF signal; a first signal detecting unit for detecting the target signal from the signal output from the first RF signal matching unit; a second signal detecting unit for detecting the target signal from the signal output from the second SF signal matching unit; and a second control unit for determining whether the two target signals detected by the first signal detecting unit and the second signal detecting unit correspond to each other and performing an operation according to the target signal only when the two target signals correspond to each other.
[0024] The target signal may be a signal for converting the second terminal from a minimum power mode (sleep mode) to an active mode (wake-up mode).
[0025] Further, the wireless communication system may further include a first comparing unit connected to the first signal detecting unit to transmit a first interrupt signal to the second control unit when the detected signal is greater than a preset reference signal; and a second comparing unit connected to the second signal detecting unit to transmit a second interrupt signal to the second control unit when the detected signal is greater than a preset reference signal, wherein the second control unit may perform an operation according to the target signal only when both the first interrupt signal and the second interrupt signal are applied.
L00261 Meanwhile, in accordance with still another aspect of the present invention to achieve the object, there is provided a method for processing a target signal using a wireless communication system by transmitting the target signal from a first terminal to a second terminal to perform an operation according to the target signal by the second terminal including: (A) modulating the target signal into a plurality of frequency signals of different bands to generate RF signals by the first terminal; (B) transmifting the RF signals generated in the step (A) by the first terminal; (C) receiving the RF signals transmitted in the step (B) and distributing the received RE signals according to bands by the second terminal; (D) detecting the target signals from the respective RF signals distributed in the step (C) by the second terminal; and (E) determining whether the target signals detected in the step (D) correspond to each other and processing the target signal when the target signals correspond to each other by the second terminal.
[0027] The target signal may be a signal for converting the second terminal from a minimum power mode (sleep mode) to an active mode (wake-up mode).
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] These and/or other aspects and advantages of the present general inventive concept will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which: L0029] FIG. 1 is a block diagram schematically illustrating a configuration of a wireless communication system in accordance with an embodiment of the present invention; [0030] FIG. 2 is a block diagram schematically illustrating a first terminal in accordance with an embodiment of the present invention; [0031] FIG. 3 is a block diagram schematically illustrating a first terminal in accordance with another embodiment of the present invention; [0032] FIG. 4 is a block diagram schematically illustrating a second terminal in accordance with an embodiment of the present invention: [00331 FIG. 5 is a block diagram schematically illustrating a second terminal in accordance with another embodiment of the present invention; 10034] FIG. 6 is a flowchart schematically illustrating an operation process in accordance with an embodiment of the present invention; and [0035] FIG. 7 is a flowchart schematically illustrating some of the operation process in accordance with an embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERABLE EMBODIMENTS
[0036] Advantages and features of the present invention and methods of accomplishing the same will be apparent by referring to embodiments described below in detail in connection with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The exemplary embodiments are provided only for completing the disclosure of the present invention. Like reference numerals refer to like elements throughout the specification.
[0037] Terms used herein are provided to explain embodiments, not limiting the present invention. Throughout this specification, the singular form includes the plural form unless the context clearly indicates otherwise. The terms comprises" and/or "comprising" used herein do not preclude existence and addition of another component, step, operation and/or device, in addition tQ the above-mentioned component, step, operation and/or device.
[0038] Hereinafter, configurations and operations of the present invention will be described in detail with reference to the accompanying drawings.
[0039] FIG. 1 is a block diagram schematically illustrating a configuration of a wireless communication system in accordance with an embodiment of the present invention.
[0040] Referring to FIG. 1, a wireless communication system in accordance with an embodiment of the present invention may include a first terminal 100 and a second terminal 200.
[0041] the first terminal 100 modulates a target signal into a plurality of frequency signals of different bands and transmits the modulated signals as RF signals.
10042] The second terminal 20D detects the target signals included in the plurality of frequency signals of different bands from the RF signals received from the first terminal 100 and processes the target signal when at least two of the detected target signals correspond to each other.
[0043] Accordingly, the first terminal 100 and the second terminal 200 can transceive the target signal as a first RF signal and a second RF signal of different frequency bands, and the second terminal 200 processes the target signal only when the target signal included in the first RE signal and the target signal included in the second RF signal correspond to each other so that it is possible to overcome malfunction due to signal interference.
[0044] At this time, the correspondence of the target signals includes the case when commands derived from the target signals, for example, wake-up commands are equal to each other as well as the case when data included in the target signals are equal to each other.
[0045] FIG. 2 is a block diagram schematically illustrating the first terminal 100 in accordance with an embodiment of the present invention.
[0046] Referring to FIG. 2, the first terminal 100 in accordance with an embodiment of the present invention may include a first control unit 110, a first RE signal generating unit 120, a second RF signal generating unit 130, a coupler 140, and an antenna 150.
(00471 The first control unit 110 generates the target signal and outputs the target signal to the first RE signal generating unit 120 and the second RF signal generating unit 130 and may be implemented with a known microcontroller unit (MCI)).
[0048] The target signal may be various kinds of data1 especially, command data such as a wake-up command.
[0049] The first RE signal generating unit 120 modulates the target signal into a first band frequency, and the second RE signal generating unit 130 modulates the target signal into a second band frequency.
[0050] The first band and the second band are different from each other. For example, the first band may be 2.4 GHz and the second band may be 1.8 GHz.
[0051] The coupler 140 couples the signals output from the first RE signal generating unit and the second RE signal generating unit 130 to transmit the coupled signal to one antenna 150, and the antenna 150 can transmit the coupled RF signal.
[0052] FIG. 3 is a block diagram schematically illustrating a first terminal 100' in accordance with another embodiment of the present invention.
[0053] Referring to FIG. 3, unlike the embodiment illustrated in FIG. 2, a first terminal 100' in accordance with another embodiment of the present invention includes a first antenna 151 and a second antenna 152 instead of a coupler 140 so that it is possible to transmit a first RF signal and a second RF signal, respectively.
[0054] Since transceiving sensitivity of the antenna can be varied according to frequencies of signals to be transceived, different antennas can be used according to frequency bands.
[0055] FIG 4 is a block diagram schematically illustrating a second terminal 200 in accordance with an embodiment of the present invention.
(0056] Referring to FIG. 4, a second terminal 200 in accordance with an embodiment of the present invention may include a third antenna 290, a distributor 210, a first RF signal matching unit 220, a second RF signal matching unit 230. a first signal detecting unit 240, a second signal detecting unit 250, a first comparing unit 260, a second comparing unit 270, and a second control unit 280.
[0057] The third antenna 290 receives the signals transmitted from the first terminal 100.
[0058] The distributor 210 distributes the RE signals received by the third antenna 290 into the first RE signal and the second RF signal according to frequency bands and may be implemented with a typical divider or diplexer [0059] The first RE signal matching unit 220 is connected to the distributor 210 to perform a function of removing noise included in the first RE signal, and the second RE signal matching unit 230 is connected to the distributor 210 to perform a function of removing noise included in the second RF signal.
(0060] The first RE signal matching unit 220 and the second RE signal matching unit 230 may be implemented with various filters.
[0061] The first signal detecting unit 240 performs a function of detecting the target signal included in the first RE signal. At this time, the detection of the target signal may be implemented through the modulation of the first RF signal. Especially, when the target signal is a wake-up signal, the target signal can be detected as a predetermined DC voltage signal.
[0062] The second signal detecting unit 250 performs a function of detecting the target signal included in the second RF signal.
(0063] The first comparing unit 260 is connected to the first signal detecting unit 240 to F. perform a function of transmitting a first interrupt signal to the second control unit 280 when the detected signal is greater than a preset reference signal and may be implemented with a known
B
corn parator.
(00641 The second comparing unit 270 is connected to the second signal detecting unit 250 to perform a function of transmitting a second interrupt signal to the second control unit 280 when the detected signal is greater than a preset reference signal and may be implemented with a known comparator.
[0065] The reference signals of the first comparing unit 260 and the second comparing unit 270 may be equal to or different from each other.
[0066] The second control unit 280 can perform an operation according to the target signal only when both the first interrupt signal and the second interrupt signal are applied.
(0067] Further, when the first comparing unit 260 and the second comparing unit 270 are not provided, the second control unit 280 determines whether the two target signals detected by the first signal detecting unit 240 and the second signal detecting unit 250 correspond to each other and can perform an operation according to the target signal only when the two target signals correspond to each other.
(0068] At this time, the second control unit 280 may be implemented with a known MCU.
[0069] FIG. 5 is a block diagram schematically illustrating a second terminal 200' according to another embodiment of the present invention.
[0070] Referring to FIG. 5, unlike the second terminal 200 in accordance with the embodiment illustrated in FIG. 4, it is possible to check that there is no distributor 210, a fourth antenna 291 is connected to a first RE signal matching unit 220, and a fifth antenna 292 is connected to a second RE signal matching unit 230.
[0071] FIG. 6 is a flowchart schematically illustrating an operation process in accordance with an embodiment of the present invention.
(0072] A method for processing a target signal using a wireless communication system in accordance with an embodiment of the present invention will be described with reference to FIGS. ito 6.
(0073] First, a first control unit 110 of a first terminal 100 generates a target signal (Si 10).
(0074] Next, a first RE signal generating unit 120 generates a first RF signal by including the target signal in a first band frequency, and at the same time, a second RF signal generating unit generates a second RF signal by including the target signal in a second band frequency (S 120).
[0075] Next, the RF signals are transmitted from an antenna 150 through a coupler 140 or from a first antenna 151 and a second antenna 152 without passing through the coupler 140 (S130).
10076] Next, a second terminal 200 receives the RF signals through a third antenna 290 (S140) and distributes the RE signals into the first RF signal and the second RF signal (S150) or receives the first RF signal and the second RE signal through a fourth antenna 291 and a fifth antenna 292. respectively.
[0077] Next, a first signal detecting unit 240 detects the target signal from the first RF signal, a second signal detecting unit 250 detects the target signal from the second RF signal, and the detected target signals are transmitted to a second control unit 280 (S160).
(0078] At this time, before detecting the target signal, a first RF signal matching unit 220 and a second RF signal matching unit 230 may remove noise included in the RE signals.
(0079] Further, when the target signal is a wake-up signal, the first signal detecting unit 240 and the second signal detecting unit 250 may output detection results as predetermined DC voltage signals. At this time, a first comparing unit 260 and a second comparing unit 270 compare the output detection results with preset reference signals, respectively and transmit interrupt signals to the second control unit 280.
[0080] Meanwhile, the second control unit 280 can perform an operation according to the target signal when the target signals correspond to each other.
[0081] FIG. 7 is a flowchart schematically illustrating some of the operation process in accordance to an embodiment of the present invention.
[0082] Referring to FIG. 7, in case that the target signal is a wake-up signal, when the second control unit 280 receives a first target signal (wake-up signal = first interrupt signal) and a second target signal (wake-up signal = second interrupt signal) through the second terminal 200, the second control unit 280 performs an operation of changing a separate device (not shown) in a sleep mode into a wake-up mode.
(0083] Accordingly, malfunction due to signal interference can be reduced.
(0084] Since the wireless communication system in accordance with the embodiments of the present invention configured as above transmits a target signal by including the target signal in a plurality of frequency signals of different bands and operates only when the target signals detected from the respective signals received as the frequency signals are equal to or correspond to each other, it provides a useful effect of remarkably reducing occurrence of malfunctions due to signal interference in the prior art.
(0085] The foregoing description illustrates the present invention. Additionally, the foregoing description shows and explains only the preferred embodiments of the present invention, but it is to be understood that the present invention is capable of use in various other combinations, modifications, and environments and is capable of changes and modifications within the scope of the inventive concept as expressed herein, commensurate with the above teachings and/or the skill or knowledge of the related art. The embodiments described hereinabove are further intended to explain best modes known of practicing the invention and to enable others skilled in the art to utilize the invention in such, or other, embodiments and with the various modifications required by the particular applications or uses of the invention. Accordingly, the description is not intended to limit the invention to the form disclosed herein. Also, it is intended that the appended claims be construed to include alternative embodiments.

Claims (1)

  1. <claim-text>CLAIMS1. A wireless communication system comprising: a first terminal for modulating a target signal into a plurality of frequency signals of different bands to transmit the modulated signals as RF signals; and a second terminal for detecting the target signals included in the plurality of frequency signals of different bands, from the RF signals transmitted from the first terminal.</claim-text> <claim-text>2. The wireless communication system according to claim 1, wherein the first terminal comprises: a first control unit for generating the target signal; H a first RF signal generating unit connected to the first control unit and modulating the target signal into a first band frequency to generate a first RE signal; a second RE signal generating unit connected to the first control unit and modulating the target signal into a second band frequency to generate a second RF signal; a coupler connected to the first RF signal generating unit and the second RF signal generating unit to couple the first RF signal and the second RF signal; and an antenna connected to the coupler.</claim-text> <claim-text>3. The wireless communication system according to claim 1, wherein the first terminal comprises: a first control unit for generating the target signal; a first RF signal generating unit connected to the first control unit and modulating the target signal into a first band frequency to generate a first RF signal; a second RE signal generating unit connected to the first control unit and modulating the target signal into a second band frequency to generate a second RE sighal; a first antenna connected to the first RF signal generating unit; and a second antenna connected to the second RE signal generating unit.</claim-text> <claim-text>4. The wireless communication system according to claim 1 or 2, wherein the second terminal comprises: an antenna for receiving the RF signals; a distributor for distributing the received RE signals according to frequency bands; a plurality of signal detecting units for detecting the target signals from the respective RF signals distributed by the distributor; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.</claim-text> <claim-text>5. The wireless communication system according to claim 1 or 3, wherein the second terminal comprises: a plurality of antennas for receiving the RF signals; a plurality of signal detecting units connected to the plurality of antennas, respectively, to detect the target signals from the respective RF signals; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.</claim-text> <claim-text>6. The wireless communication system according to claim 1 or 2, wherein the second terminal comprises: an antenna for receiving the RE signals; a distributor for distributing the received RF signals according to frequency bands; a plurality of RF signal matching units connected to the distributor to remove noise from the respective RF signals; a plurality of signal detecting units for detecting the target signals from the respective RE signals passing through the RF signal matching units; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.</claim-text> <claim-text>7. The wireless communication system according to claim 1 or 3, wherein the second terminal comprises: a plurality of antennas for receiving the RF signals; a plurality of RF signal matching units connected to the plurality of antennas, respectively, to remove noise from the respective RF signals; a plurality of signal detecting units connected to the RF signal matching units, respectively, to detect the target signals from the respective RF signals; and a control unit for determining whether at least two of the target signals detected by the signal detecting units correspond to each other and performing an operation according to the target signal only when the at least two of the target signals correspond to each other.</claim-text> <claim-text>8. The wireless communication system according to one of claims 1 to 7, wherein the target signal is a signal for converting the second terminal from a minimum power mode (sleep mode) to an active mode (wake-up mode).</claim-text> <claim-text>9. The wireless communication system according to one of claims 4 to 7, wherein the second terminal further comprises: a plurality of comparing units connected to rear ends of the signal detecting units, respectively, to provide interrupt signals to the control unit in the second terminal when the detected signals are greater than preset reference signals.</claim-text> <claim-text>10. The wireless communication system according to claim 9, wherein the control unit in the second terminal performs an operation according to the target signal when the plurality of interrupt signals are applied.</claim-text> <claim-text>11. A wireless communication system comprising: a first terminal comprising a first control unit for generating a target signal; a first RE signal generating unit connected to the first control unit and modulating the target signal into a first band frequency to generate a first RF signal; a second RE signal generating unit connected to the first control unit and modulating the target signal into a second band frequency to generate a second RF signal; a coupler connected to the first RF signal generating unit and the second RF signal generating unit to couple the first RF signal and the second RE signal; and a first antenna connected to the coupler; and a second terminal comprising a third antenna for receiving the RF signals transmitted from the first antenna; a distributor for distributing the received RE signals into a first received RE signal and a second received RE signal; a first RE signal matching unit for removing noise from the first received RF signal; a second RF signal matching unit for removing noise from the second received RF signal; a first signal detecting unit for detecting the target signal from the signal output from the first RF signal matching unit; a second signal detecting unit for detecting the target signal from the signal output from the second RF signal matching unit; and a second control unit for determining whether the two target signals detected by the first signal detecting unit and the second signal detecting unit correspond to each other and performing an operation according to the target signal only when the two target signals correspond to each other.</claim-text> <claim-text>12. The wireless communication system according to claim 11, wherein the target signal is a signal for converting the second terminal from a minimum power mode (sleep mode) to an active mode (wake-up mode).</claim-text> <claim-text>13. The wireless communication system according to claim 11, further comprising: a first comparing unit connected to the first signal detecting unit to transmit a first interrupt signal to the second control unit when the detected signal is greater than the preset reference signal; and a second comparing unit connected to the second signal detecting unit to transmit a second interrupt signal to the second control unit when the detected signal is greater than the preset reference signal, wherein the second control unit performs an operation according to the target signal only when both the first interrupt signal and the second interrupt signal are applied.</claim-text> <claim-text>14. A method for processing a target signal using a wireless communication system by transmitting the target signal from a first terminal to a second terminal to perform an operation by the second terminal according to the target signal comprising: (A) modulating the target signal into a plurality of frequency signals of different bands to generate RF signals by the first terminal; (B) transmitting the RF signals generated in the step (A) by the first terminal; (C) receiving the RF signals transmitted in the step (B) and distributing the received RF signals according to bands by the second terminal; (D) detecting the target signals from the respective RF signals distributed in the step (C) by the second terminal; and (E) determining whether the target signals detected in the step (D) correspond to each other and processing the target signal by the second terminal only when the target signals correspond to each other.</claim-text> <claim-text>15. The method for processing a target signal using a wireless communication system according to claim 14, wherein the target signal is a signal for converting the second terminal from a minimum power mode (sleep mode) to an active mode (wake-up mode).</claim-text>
GB1215569.3A 2011-08-31 2012-08-31 Transmission of a signal over a plurality of frequency bands Withdrawn GB2494300A (en)

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