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WO2018173795A1 - Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception - Google Patents

Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception Download PDF

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Publication number
WO2018173795A1
WO2018173795A1 PCT/JP2018/009152 JP2018009152W WO2018173795A1 WO 2018173795 A1 WO2018173795 A1 WO 2018173795A1 JP 2018009152 W JP2018009152 W JP 2018009152W WO 2018173795 A1 WO2018173795 A1 WO 2018173795A1
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WIPO (PCT)
Prior art keywords
transmission
signal
reception
unit
frequency
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PCT/JP2018/009152
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English (en)
Japanese (ja)
Inventor
悠介 米山
Original Assignee
ソニーセミコンダクタソリューションズ株式会社
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by ソニーセミコンダクタソリューションズ株式会社 filed Critical ソニーセミコンダクタソリューションズ株式会社
Priority to JP2019507538A priority Critical patent/JP7214624B2/ja
Priority to EP18770377.2A priority patent/EP3614215A4/fr
Publication of WO2018173795A1 publication Critical patent/WO2018173795A1/fr

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS

Definitions

  • the present technology relates to a transmission apparatus and method, and a reception apparatus and method, and more particularly, to a transmission apparatus and method, and a reception apparatus and method that can suppress a reduction in communication quality.
  • signal multiplexing methods include frequency division multiplexing (FDM (Frequency Division Multiplexing)), time division multiplexing (TDM (Time Division Division Multiplexing)), spread spectrum, and the like (for example, see Patent Document 1).
  • FDM Frequency Division Multiplexing
  • TDM Time Division Division Multiplexing
  • spread spectrum for example, see Patent Document 1
  • Patent Document 2 a transmission signal modulation method
  • a method of chirp modulating a phase modulation signal has been considered (for example, see Patent Document 2).
  • more accurate frequency control and time control are required. Therefore, it was considered to control them using GNSS signals.
  • GNSS signal reception is not always good.
  • the error in the generated time information and frequency information may increase due to the use of interpolation formulas, etc., which may reduce the communication quality. there were.
  • the present disclosure has been made in view of such a situation, and is intended to suppress a reduction in communication quality.
  • a transmission device is based on a GNSS signal or an oscillation frequency of an oscillator, a setting unit that sets information for controlling transmission of a transmission signal, and the information set by the setting unit
  • a transmission apparatus comprising: a transmission control unit that controls transmission of the transmission signal; and a transmission unit that transmits the transmission signal according to control of the transmission control unit.
  • the setting unit can select the GNSS signal or the oscillation frequency according to the reception status of the GNSS signal, and set the information using the selected one.
  • the setting unit sets the information using the GNSS signal when the received GNSS signal is higher in quality than a predetermined reference value, and the received GNSS signal is lower in quality than the reference value.
  • the information can be set using the oscillation frequency.
  • the information includes time information, and when the received GNSS signal is higher in quality than a predetermined reference value, the setting unit sets a time obtained from the GNSS signal as the time information and is received.
  • a time obtained by counting at a timing synchronized with the oscillation frequency can be set as the time information.
  • the transmission control unit can control the transmission unit to transmit the transmission signal to a predetermined reception side at a known transmission timing based on the time information set by the setting unit.
  • the setting unit uses the time obtained from the GNSS signal to count the time obtained by counting at a timing synchronized with the oscillation frequency. It can be corrected.
  • the information includes a transmission control frequency, and when the received GNSS signal is higher in quality than a predetermined reference value, the setting unit sets the oscillation frequency to a frequency obtained from the currently received GNSS signal.
  • the oscillation frequency is corrected with the previous correction value when the corrected oscillation frequency is set as the transmission control frequency.
  • the oscillation frequency after correction may be configured to be set as the transmission control frequency.
  • the transmission control unit can control the transmission unit to transmit the transmission signal at a transmission frequency based on the transmission control frequency set by the setting unit.
  • a GNSS receiver that receives the GNSS signal; and the setting unit is configured to set the information based on the GNSS signal or the oscillation frequency received by the GNSS receiver. Can do.
  • a transmission method sets information for controlling transmission of a transmission signal based on a GNSS signal or an oscillation frequency of an oscillator, and controls transmission of the transmission signal based on the set information. And transmitting the transmission signal according to the transmission control.
  • a receiving device is set by a setting unit that sets information for controlling reception of a signal transmitted from a transmission side based on a GNSS signal or an oscillation frequency of an oscillator, and the setting unit. And a reception control unit that controls reception of the signal based on the information, and a reception unit that receives the signal in accordance with control of the reception control unit.
  • the setting unit can select the GNSS signal or the oscillation frequency according to the reception status of the GNSS signal, and set the information using the selected one.
  • the setting unit sets the information using the GNSS signal when the received GNSS signal is higher in quality than a predetermined reference value, and the received GNSS signal is lower in quality than the reference value.
  • the information can be set using the oscillation frequency.
  • the information includes time information, and when the received GNSS signal is higher in quality than a predetermined reference value, the setting unit sets a time obtained from the GNSS signal as the time information and is received.
  • a time obtained by counting at a timing synchronized with the oscillation frequency can be set as the time information.
  • the reception control unit can control the reception unit to cause the transmission side to receive the signal at a predetermined reception timing based on the time information set by the setting unit.
  • the setting unit uses the time obtained from the GNSS signal to count the time obtained by counting at a timing synchronized with the oscillation frequency. It can be corrected.
  • the information includes a reception control frequency, and when the received GNSS signal is higher in quality than a predetermined reference value, the setting unit determines the oscillation frequency as a frequency obtained from the currently received GNSS signal. When the received GNSS signal is lower in quality than the reference value, the oscillation frequency is corrected with the previous correction value. The corrected oscillation frequency can be set as the reception control frequency.
  • the reception control unit can control the reception unit to receive the signal at a reception frequency based on the reception control frequency set by the setting unit.
  • a GNSS receiver that receives the GNSS signal; and the setting unit is configured to set the information based on the GNSS signal or the oscillation frequency received by the GNSS receiver. Can do.
  • a reception method sets information for controlling reception of a signal transmitted from a transmission side based on a GNSS signal or an oscillation frequency of an oscillator, and based on the set information, A reception method for performing reception control of the signal and receiving the signal according to the reception control.
  • information for controlling transmission of the transmission signal is set based on the GNSS signal or the oscillation frequency of the oscillator, and the transmission signal is transmitted based on the set information. Transmission control is performed, and a transmission signal is transmitted according to the transmission control.
  • information for controlling reception of a signal transmitted from the transmission side is set based on the GNSS signal or the oscillation frequency of the oscillator, and the set information is Based on this, signal reception control is performed, and a signal is received according to the reception control.
  • a signal can be transmitted or received. According to the present technology, it is possible to suppress a reduction in communication quality.
  • FIG. 20 is a block diagram illustrating a main configuration example of a computer.
  • FIG. 1 is a diagram illustrating a main configuration example of a position notification system which is an embodiment of a signal transmission / reception system to which the present technology is applied.
  • a position notification system 100 shown in FIG. 1 is a system in which a transmission apparatus 101 notifies its own position. This system is used, for example, for monitoring and managing a target position.
  • the position notification system 100 includes devices such as a transmission device 101, a high sensitivity reception device 102, a server 104, and a terminal device 105.
  • the number of the transmission device 101, the high sensitivity receiving device 102, the server 104, and the terminal device 105 is arbitrary, and may be plural.
  • the transmission apparatus 101 is an embodiment of a transmission apparatus to which the present technology is applied, and transmits, for example, identification information for identifying itself, position information indicating its own position, and the like as a radio signal.
  • the high-sensitivity receiving apparatus 102 is an embodiment of a receiving apparatus to which the present technology is applied.
  • the high-sensitivity receiving apparatus 102 receives the wireless signal, acquires identification information, position information, and the like of the transmitting apparatus 101, and transmits them through the network 103.
  • To the server 104 That is, the high sensitivity receiving apparatus 102 functions as a relay station that relays the information transmitted from the transmitting apparatus 101 and transmits it to the server 104.
  • the server 104 manages the position of each transmission apparatus 101 by managing the position information associated with the identification information.
  • a terminal device 105 operated by a user who wants to know the position of the transmission apparatus 101 accesses the server 104 via the network 103, supplies identification information of the desired transmission apparatus 101, and requests the position information.
  • the server 104 supplies position information corresponding to the requested identification information to the terminal device 105.
  • the terminal device 105 acquires the position information and notifies the user of the position of the transmission device 101 by displaying the position information together with map data, for example.
  • the server 104 can indirectly manage the position of the position monitoring (management) target by carrying (including carrying or wearing) such a transmission apparatus 101 by a target whose position is to be monitored (managed). Can do.
  • the user targets the elderly person 111 for position monitoring, and the elderly person 111 carries the transmission device 101.
  • the position of the transmission device 101 is managed by the server 104 and provided to the terminal device 105. Therefore, the user can grasp the position of the elderly person 111 who is carrying the transmission device 101 by operating the terminal device 105.
  • the position monitoring target is arbitrary. For example, it may be a child, an animal such as a dog or a cat, or a company employee.
  • the transmission device 101 may be configured as a dedicated device, but may be incorporated in a portable information processing device such as a mobile phone or a smartphone, for example.
  • the position information of the transmission apparatus 101 may be any information as long as it indicates the position of the transmission apparatus 101, and may be generated in any manner.
  • the transmission apparatus 101 may receive a GNSS signal from a GNSS (Global Navigation Satellite System) satellite, and obtain its position information (for example, latitude and longitude) based on the GNSS signal.
  • the transmitting apparatus 101 may specify its own position using a dedicated position specifying system other than GNSS.
  • this position information may be generated by a device other than the transmission device 101, such as the high sensitivity receiving device 102, the server 104, or a dedicated information processing device (such as a server) provided separately.
  • the GNSS signal received by the transmission apparatus 101 may be supplied to another apparatus, and the other apparatus may obtain the position information of the transmission apparatus 101 from the GNSS signal.
  • the transmission apparatus 101 supplies information obtained using a dedicated position specifying system other than GNSS to another apparatus, and the other apparatus obtains position information of the transmission apparatus 101 based on the information. May be.
  • another device may obtain the position information of the transmission device 101 based on the communication status between the transmission device 101 and the high sensitivity reception device 102. For example, by specifying the high sensitivity receiving device 102 that has received the signal from the transmitting device 101, it may be specified that the transmitting device 101 is located within the communicable range of the high sensitivity receiving device 102.
  • position information of the transmission apparatus 101 may be obtained based on the signal strength, delay time, and the like of the received signal received by the high sensitivity receiving apparatus 102. Further, for example, the position information of the transmission apparatus 101 may be obtained by trigonometry or the like using the position information of a plurality of high sensitivity reception apparatuses 102 that have received signals from the transmission apparatus 101.
  • the installation position of the high sensitivity receiver 102 is arbitrary.
  • the roof or the roof of a building 112 such as a building, apartment, or house may be used.
  • a position monitoring target for example, an elderly person 111 carrying the transmission device 101 is active, and it is preferable because the buildings 112 are easy to install.
  • the position monitoring target is a person
  • the home of the position monitoring target is more preferable because the position monitoring target is more likely to be located in the vicinity thereof.
  • the high-sensitive receiving device 102 may be installed on a movable object (also referred to as a moving body) such as an automobile, a motorcycle, or a bicycle. That is, the position of the high sensitivity receiving apparatus 102 may be variable.
  • a movable object also referred to as a moving body
  • the position of the high sensitivity receiving apparatus 102 may be variable.
  • the network 103 is an arbitrary communication network, may be a wired communication network, a wireless communication network, or may be configured by both of them. Further, the network 103 may be configured by a single communication network or may be configured by a plurality of communication networks. For example, communication conforming to the Internet, public telephone network, so-called 3G and 4G wireless mobile wide area networks, WAN (Wide Area Network), LAN (Local Area Network), Bluetooth (registered trademark) standards , Wireless communication network for near field communication such as NFC (Near Field Communication), infrared communication path, HDMI (High-Definition Multimedia Interface) and USB (Universal Serial Bus) standards
  • the network 103 may include a communication network or a communication path of an arbitrary communication standard such as a wired communication network complying with the standard.
  • the server 104 and the terminal device 105 are information processing devices that process information.
  • the server 104 and the terminal device 105 are communicably connected to the network 103, and can communicate with other communication devices connected to the network 103 via the network 103 to exchange information.
  • the server 104 manages the position of each transmission device 101.
  • the server 104 can also manage users who are permitted to provide location information of the transmission apparatus 101.
  • the server 104 can provide the position information of each transmission apparatus 101 only to users who are permitted to acquire the position information of the transmission apparatus 101.
  • the server 104 manages the position of the transmission apparatus 101. That is, the server 104 can manage the position of the transmission device 101 in a state where the transmission device 101 is located within the communicable range of any of the high sensitivity reception devices 102. In other words, if the position of the transmission apparatus 101 is out of the communicable range of any of the high sensitivity receiving apparatuses 102, the server 104 cannot manage the position. Therefore, the server 104 can manage the position of the transmission apparatus 101 more accurately as the communication range network of the high sensitivity reception apparatus 102 with the transmission apparatus 101 becomes wider.
  • more accurate management means that the position of the transmitting apparatus 101 is managed in a wider range (that is, the area where the position of the transmitting apparatus 101 cannot be managed is reduced).
  • the transmission apparatus 101 and the high-sensitivity reception apparatus 102 can transmit and receive radio signals farther (for each high-sensitivity reception apparatus 102).
  • a wider communication range is preferable.
  • the method of transmitting and receiving the radio signal between the transmitting apparatus 101 and the high sensitivity receiving apparatus 102 is arbitrary, and may conform to any communication standard. For example, a frequency band including 925 MHz (both 920 MHz band) May be used in a method that enables long-distance communication.
  • the high sensitivity reception apparatus 102 detects the radio signal at the known time and frequency. Detection is easier because it only has to be done. Therefore, reception sensitivity can be improved. That is, the communicable range of the high sensitivity receiving apparatus 102 can be further expanded. In addition, if the accuracy of such time and frequency control is reduced, detection becomes more difficult and reception sensitivity may be reduced. In other words, the reception sensitivity can be improved by improving the control accuracy of time and frequency.
  • one high-sensitivity receiving apparatus 102 is wirelessly transmitted from a plurality of transmitting apparatuses 101 (transmitting apparatuses 101-1 to 101-N).
  • a case of receiving a signal can be considered.
  • Conventional signal multiplexing methods include frequency division multiplexing (FDM (Frequency Division Multiplexing)), time division multiplexing (TDM (Time Division Division Multiplexing)), spread spectrum, and the like, as described in Patent Document 1, for example. It was.
  • a modulation method of a transmission signal for example, as described in Patent Document 2, a method of chirp modulating a phase modulation signal has been considered.
  • the number (N) of transmission apparatuses 101 as shown in FIG. 2 is increased, so that more signals are required to be multiplexed.
  • N the number of transmission apparatuses 101 as shown in FIG. 2
  • ⁇ Time control> For example, when time division multiplexing is performed in the position notification system 100 as shown in FIG. 1, it is assumed that an accuracy of about 10 ⁇ sec is required for time control. However, it has been difficult to achieve such accuracy with an oscillator that is generally built in the transmitter 101 or the high sensitivity receiver 102. Therefore, it has been considered to perform time control using a GNSS (Global Navigation Satellite System) signal.
  • GNSS Global Navigation Satellite System
  • GNSS Global Navigation Satellite System
  • the GNSS signal is a navigation signal transmitted by the navigation satellite.
  • a receiver on the earth 120 receives GNSS signals from four navigation satellites (navigation satellite 121 to navigation satellite 124) and performs positioning based on them.
  • the position of the navigation satellite 121 is (X1, Y1, Z1), and the satellite time is T1.
  • the position of the navigation satellite 122 is (X2, Y2, Z2), and the satellite time is T2.
  • the position of the navigation satellite 123 is (X3, Y3, Z3), and the satellite time is T3.
  • the position of the navigation satellite 124 is (X4, Y4, Z4), and the satellite time is T4.
  • the receiver position is (Xu, Yu, Zu), and the receiver time is Tu.
  • the receiver calculates its position from the synchronization information of the spreading code (C / A code) of the GNSS signal.
  • the GNSS signal S1 of the navigation satellite 121, the GNSS signal S2 of the navigation satellite 122, the GNSS signal S3 of the navigation satellite 123, and the GNSS signal S4 of the navigation satellite 124 are received at a time as shown in FIG. Let's say.
  • the relationship between the reception times of the GNSS signals can be expressed by the times T1, T2, T3, T4, and Tu.
  • T1, T2, T3, T4, and Tu For example, when the light speed is C, the following equations (1) to (4) are used. A simple simultaneous equation holds.
  • the receiver position (Xu, Yu, Zu) and the receiver time Tu can be obtained.
  • the GNSS signal can be received from four or more navigation satellites with sufficient quality, the position of the receiver and the receiver time can be obtained.
  • Such a navigation satellite has a highly accurate cesium oscillator, and can obtain more accurate time information than an oscillator normally built in a receiver or the like. Therefore, generally, the time information (receiver time) obtained based on the GNSS signal as described above in the receiver is more accurate than the time information obtained using the oscillator built in the receiver.
  • the information obtained from the GNSS signal includes advance information for correcting “leap second”.
  • the receiver can obtain more correct time information by inserting “leap seconds” based on this information.
  • the accuracy of time control at the time of signal transmission / reception can be improved by using the time information obtained from such a GNSS signal by the transmission device 101 and the high sensitivity receiving device 102 in the position notification system 100. That is, higher quality communication can be realized.
  • reception of GNSS signals is not always good. If the received GNSS signal quality is not sufficient and the coordinates and time of each observed navigation satellite contain errors, the accuracy of the receiver position (Xu, Yu, Zu) and the receiver time Tu will also be reduced.
  • the receiver uses the interpolation formula to determine the position of the receiver. And determine the receiver time. For this reason, the accuracy of the position of the obtained receiver and the receiver time may be reduced. As a result, the accuracy of time control may be reduced. If the accuracy of time control is reduced, signals may be mixed in time division multiplexing, or reception sensitivity may be reduced due to an increase in error in signal transmission / reception time, and communication quality may be reduced.
  • information for controlling transmission of the transmission signal is set based on the GNSS signal or the oscillation frequency of the oscillator, transmission control of the transmission signal is performed based on the set information, and the transmission signal is transmitted according to the transmission control. To send. By doing so, it is possible to suppress a reduction in accuracy of time control and suppress a reduction in communication quality.
  • FIG. 4 is a block diagram illustrating a main configuration example of the transmission apparatus 101.
  • the transmission apparatus 101 includes a reference value setting unit 211, a GNSS reception unit 212, a correction determination unit 213, an oscillator 214, a clock counter 215, a clock unit 216, a transmission schedule control unit 217, and a transmission control unit 218. , An oscillation unit 219, and a transmission unit 220.
  • the reference value setting unit 211 performs processing related to setting of a reference value related to determination regarding transmission time control.
  • the reference value setting unit 211 can be realized by an arbitrary configuration.
  • the reference value setting unit 211 may be configured by a circuit, LSI (Large Scale Integration), system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the reference value setting unit 211 may include a CPU and a memory, and a CPU (Central Processing Unit) may execute the above-described processing by executing a program using the memory.
  • CPU Central Processing Unit
  • the GNSS receiving unit 212 performs processing related to reception of GNSS signals.
  • the GNSS receiving unit 212 can be realized by an arbitrary configuration.
  • the GNSS receiver 212 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the GNSS receiving unit 212 may be configured by an antenna, a receiving circuit, a signal processing circuit, and the like.
  • the correction determination unit 213 performs processing related to determination regarding transmission time control.
  • the correction determination unit 213 can be realized by an arbitrary configuration.
  • the correction determination unit 213 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the correction determination unit 213 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the oscillator 214 oscillates at a predetermined oscillation frequency and generates a signal having the oscillation frequency.
  • the oscillator 214 can be realized by an arbitrary configuration.
  • the oscillator 214 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the oscillator 214 may be configured by an oscillation circuit or the like. Note that the oscillation method of the oscillator 214 is arbitrary.
  • the clock counter 215 performs processing related to time generation based on the signal generated by the oscillator 214.
  • the clock counter 215 can be realized by an arbitrary configuration.
  • the clock counter 215 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the clock counter 215 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the clock unit 216 performs processing related to generation of time information used for transmission timing control.
  • the clock unit 216 can be realized by an arbitrary configuration.
  • the clock unit 216 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the clock unit 216 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the transmission schedule control unit 217 performs processing related to transmission schedule control.
  • the transmission schedule control unit 217 can be realized by an arbitrary configuration.
  • the transmission schedule control unit 217 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the transmission schedule control unit 217 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the transmission control unit 218 performs processing related to transmission control.
  • the transmission control unit 218 can be realized by an arbitrary configuration.
  • the transmission control unit 218 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the transmission control unit 218 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the oscillating unit 219 performs processing related to setting of the transmission frequency.
  • the oscillation unit 219 can be realized by an arbitrary configuration.
  • the oscillating unit 219 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the oscillation unit 219 may be configured by an oscillation circuit or the like. Note that the oscillation method of the oscillation unit 219 is arbitrary.
  • the transmission unit 220 performs processing related to transmission.
  • the transmission unit 220 can be realized by an arbitrary configuration.
  • the transmission unit 220 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the transmission unit 220 may be configured by a signal processing circuit, a transmission circuit, an antenna, and the like.
  • the clock unit 216 transmits the transmission signal based on the GNSS signal received by the GNSS reception unit 212 or the oscillation frequency of the oscillator 214 (the frequency of the signal generated by the oscillator 214).
  • the time information which is information for controlling the transmission of is set.
  • the transmission control unit 218 controls transmission of a transmission signal based on the time information.
  • the transmission unit 220 transmits a transmission signal according to the control, that is, at the transmission time specified by the time information.
  • the time information obtained based on the GNSS signal is more accurate than the time information obtained based on the oscillation frequency of the oscillator 214.
  • the time information obtained based on the GNSS signal may be less accurate than the time information obtained based on the oscillation frequency of the oscillator 214. Therefore, as described above, the time information is set by appropriately using both the GNSS signal and the oscillation frequency of the oscillator 214, thereby reducing the accuracy of time control even when the reception quality of the GNSS signal is not sufficient. Can be suppressed. That is, the transmission signal can be transmitted more accurately at a desired timing (transmission time).
  • this transmission time is a timing known to the receiving side. That is, by doing so, the transmission apparatus 101 can suppress the transmission time from deviating from the timing known to the reception side. In other words, the transmission apparatus 101 more accurately determines the reception time (the timing at which a signal is received) by the high-sensitivity reception apparatus 102 at a timing corresponding to the transmission time of the transmission signal (ie, a timing suitable for receiving the transmission signal). ).
  • the transmission apparatus 101 can reduce the accuracy of time control even when the reception quality of the GNSS signal is not sufficient, and prevent the signals from mixing with each other as described above. More signals can be multiplexed.
  • the transmission apparatus 101 can suppress a decrease in reception sensitivity of the high sensitivity reception apparatus 102 and can suppress a decrease in communication quality.
  • the clock unit 216 can select a GNSS signal or an oscillation frequency according to the reception status of the GNSS signal, and can set time information using the selected one. Therefore, even when the reception quality of the GNSS signal is not sufficient, a reduction in control accuracy can be suppressed, so that a reduction in communication quality can be suppressed.
  • the clock unit 216 sets time information using the GNSS signal, and when the received GNSS signal is lower in quality than the reference value, Time information can be set using the oscillation frequency. More specifically, when the received GNSS signal is higher in quality than a predetermined reference value, the clock unit 216 sets a time obtained from the GNSS signal as time information, and the received GNSS signal is used as the reference. When the quality is lower than the value, the time obtained by counting at the timing synchronized with the oscillation frequency in the clock counter 215 can be set as the time information. Therefore, even when the reception quality of the GNSS signal is not sufficient, a reduction in control accuracy can be suppressed, so that a reduction in communication quality can be suppressed.
  • the transmission control unit 218 controls the transmission unit 220 to transmit a transmission signal based on the time information set by the clock unit 216 to a transmission timing known to a predetermined reception side. Can be transmitted. Therefore, since a transmission signal can be transmitted at a more accurate transmission time, it is possible to suppress a reduction in communication quality. Further, even when the transmission signal is time-division multiplexed, the transmission control unit 218 can transmit the transmission timing of each signal at a more accurate timing by using the time information set by the clock unit 216. More signals can be multiplexed while preventing the signals from being mixed, and a reduction in communication quality can be suppressed.
  • the oscillator 214 oscillates at the oscillation frequency and generates a signal of that frequency.
  • the oscillator 214 supplies the signal to the clock counter 215.
  • the clock counter 215 performs counting at a timing synchronized with the frequency of the signal supplied from the oscillator 214 (that is, the oscillation frequency), and sets a time based on the oscillation frequency (also referred to as an oscillator generation time).
  • the clock counter 215 supplies the oscillator generation time to the clock unit 216.
  • the clock unit 216 can set time information using the oscillator generation time as described above.
  • such a clock counter 215 uses the time obtained from the GNSS signal in the correction determination unit 213 and synchronizes with the oscillation frequency given by the oscillator 214. The time obtained by counting at the above timing can be corrected. As a result, the time based on the oscillation frequency can be made more accurate, so even when the reception quality of the GNSS signal is not sufficient, more accurate time information can be set and the reduction in communication quality can be suppressed. it can.
  • the GNSS receiving unit 212 receives, for example, a GNSS signal.
  • the clock unit 216 can set time information based on the GNSS signal or the oscillation frequency received by the GNSS receiving unit 212.
  • the correction determination unit 213 determines whether the quality of the GNSS signal received by the GNSS reception unit 212 is sufficiently high based on the reference value set by the reference value setting unit 211, for example. . If it is determined that the GNSS signal is sufficiently high quality, the correction determination unit 213 sets the time (corrected time) based on the GNSS signal received by the GNSS reception unit 212, for example.
  • the correction determination unit 213 supplies the time based on the GNSS signal to the clock counter 215 and the clock unit 216.
  • the clock unit 216 can generate time information from the time based on this GNSS signal.
  • the clock counter 215 can correct the time based on the oscillation frequency using the time based on the GNSS signal.
  • the reference value setting unit 211 sets a correction application determination reference value used as a threshold in the determination by the correction determination unit 213 in step S101.
  • the method for setting the reference value is arbitrary. For example, a predetermined value may be set, may be specified by a user, or may be set according to, for example, an external environment or an internal environment.
  • the reference value setting unit 211 supplies the set correction application determination reference value to the correction determination unit 213.
  • the GNSS receiver 212 receives a GNSS signal.
  • the GNSS signal includes various information such as time information and position information of the navigation satellite that transmitted the GNSS signal.
  • the GNSS reception unit 212 supplies the information included in the received GNSS signal to the correction determination unit 213 as reception information.
  • the correction determination unit 213 determines the quality of the received information.
  • the correction determination unit 213 determines (evaluates) the quality of received information based on information such as the number of satellites that have received GNSS signals, the CNR (Carrier-to-Noise-ratio) of each satellite, the Doppler frequency, altitude, and leap seconds. .
  • step S104 the correction determination unit 213 determines whether the quality of the received information is high with the correction application determination reference value set by the reference value setting unit 211 as a threshold value. If the quality of the received information exceeds the correction application determination reference value and it is determined that the quality is sufficiently high, the process proceeds to step S105.
  • step S105 the correction determination unit 213 sets a time (corrected time) based on the GNSS signal using the received information, and supplies the corrected time to the clock counter 215 and the clock unit 216.
  • This correction time is a time based on the time information of the navigation satellite as described above, and is more accurate than the time based on the oscillation frequency. That is, the time includes a correction amount for the time based on the oscillation frequency.
  • step S106 the clock unit 216 sets the corrected time as time information.
  • the clock unit 216 supplies the set time information to the transmission schedule control unit 217. If the received GNSS signal is of sufficiently high quality, the corrected time obtained based on the GNSS signal is sufficiently accurate. Therefore, the clock unit 216 can set more accurate time information by using the correct correction time. Therefore, the transmission apparatus 101 can suppress a reduction in communication quality by transmitting a transmission signal based on the more accurate time information.
  • step S107 the clock counter 215 corrects its own count value, that is, the oscillator generation time, with the correction time generated by the processing in step S105. Therefore, the clock counter 215 can make the oscillator generation time (count value) more accurate by correcting the oscillator generation time using the correct correction time. Therefore, even when the reception quality of the GNSS signal is not sufficient, the transmission device 101 can set more accurate time information, and can suppress a reduction in communication quality.
  • step S107 When the process of step S107 is completed, the process proceeds to step S110. If it is determined in step S104 that the quality of the received information does not exceed the correction application determination reference value and is not sufficiently high quality (low quality), the process proceeds to step S108.
  • step S108 the clock counter 215 generates the oscillator generation time from the oscillation frequency of the oscillator 214.
  • the clock unit 216 sets the oscillator generation time generated by the process in step S108 as time information. That is, when the reception quality of the GNSS signal is low, the time information is set using the time based on the oscillation frequency generated inside the transmission apparatus 101 without depending on the GNSS signal. Therefore, even when the reception quality of the GNSS signal is not sufficient, the transmission apparatus 101 can suppress a reduction in accuracy of time information due to the use of an interpolation formula or the like, and can suppress a reduction in communication quality.
  • step S110 the transmission schedule control unit 217 sets the transmission timing for transmitting the transmission signal based on the time information supplied from the clock unit 216 and the transmission schedule set in advance (also known to the reception side). To do. This transmission timing is known to the receiving side.
  • the transmission schedule control unit 217 can set the transmission timing to a more accurate time by setting the transmission timing using the time information set as described above. Therefore, reduction in communication quality can be suppressed.
  • the transmission schedule control unit 217 supplies the set transmission timing to the transmission control unit 218.
  • the transmission control unit 218 controls the oscillation unit 219 and the transmission unit 220 to transmit the transmission signal at the transmission timing set in step S110.
  • the oscillation unit 219 oscillates at a predetermined oscillation frequency (for example, 920 MHz band) under the control of the transmission control unit 218 and supplies a signal having the oscillation frequency to the transmission unit 220.
  • the transmission unit 220 generates a transmission signal, and transmits the transmission signal at the oscillation frequency of the oscillation unit 219 at the above-described transmission timing in accordance with the control of the transmission control unit 218. Accordingly, the transmission unit 220 can transmit the transmission signal at a more accurate transmission timing even when the reception quality of the GNSS signal is not sufficient, and thus it is possible to suppress a reduction in communication quality.
  • the method of generating the transmission signal is arbitrary. Further, the content of the transmission signal is also arbitrary. For example, time information, position information, and the like of the transmission apparatus 101 may be included. Further, the transmission signal may be transmitted by time division multiplexing. Even in this case, the transmission unit 220 can transmit the transmission signal at a more accurate transmission timing even when the reception quality of the GNSS signal is not sufficient by transmitting the transmission signal according to the control of the transmission control unit 218. It is possible to multiplex more signals while preventing the signals from being mixed. Therefore, reduction in communication quality can be suppressed.
  • step S111 When the process of step S111 ends, the transmission process ends.
  • the transmission apparatus 101 can suppress a reduction in communication quality.
  • Second Embodiment> ⁇ Time control of receiver>
  • the high-sensitivity receiving apparatus 102 as in the case of the transmitting apparatus 101, it is possible to perform more accurate time control by using the GNSS signal. If there are errors in the coordinates and time of the navigation satellite, communication quality may be reduced.
  • FIG. 6 is a block diagram illustrating a main configuration example of the high sensitivity receiving apparatus 102.
  • the high sensitivity receiving apparatus 102 includes a reference value setting unit 311, a GNSS receiving unit 312, a correction determining unit 313, an oscillator 314, a clock counter 315, a clock unit 316, a reception schedule control unit 317, reception control.
  • the reference value setting unit 311 performs processing related to setting of a reference value related to determination regarding reception time control.
  • the reference value setting unit 311 can be realized by an arbitrary configuration.
  • the reference value setting unit 311 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the reference value setting unit 311 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the GNSS receiver 312 performs processing related to reception of GNSS signals.
  • the GNSS receiving unit 312 can be realized by an arbitrary configuration.
  • the GNSS receiver 312 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the GNSS receiving unit 312 may be configured with an antenna, a receiving circuit, a signal processing circuit, and the like.
  • the correction determination unit 313 performs processing related to determination regarding control of reception time.
  • the correction determination unit 313 can be realized by an arbitrary configuration.
  • the correction determination unit 313 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the correction determination unit 313 may include a CPU and a memory, and the CPU may execute a program using the memory to perform the above-described processing.
  • the oscillator 314 oscillates at a predetermined oscillation frequency and generates a signal having the oscillation frequency.
  • the oscillator 314 can be realized by an arbitrary configuration.
  • the oscillator 314 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the oscillator 314 may be configured by an oscillation circuit or the like. Note that the oscillation method of the oscillator 314 is arbitrary.
  • the clock counter 315 performs processing related to time generation based on the signal generated by the oscillator 314.
  • the clock counter 315 can be realized by an arbitrary configuration.
  • the clock counter 315 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the clock counter 315 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the clock unit 316 performs processing related to generation of time information used for reception timing control.
  • the clock unit 316 can be realized by an arbitrary configuration.
  • the clock unit 316 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the clock unit 316 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the reception schedule control unit 317 performs processing related to reception schedule control.
  • the reception schedule control unit 317 can be realized by an arbitrary configuration.
  • the reception schedule control unit 317 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the reception schedule control unit 317 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the reception control unit 318 performs processing related to reception control.
  • the reception control unit 318 can be realized by an arbitrary configuration.
  • the reception control unit 318 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the reception control unit 318 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the oscillating unit 319 performs processing related to the setting of the reception frequency.
  • the oscillation unit 319 can be realized by an arbitrary configuration.
  • the oscillating unit 319 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the oscillation unit 219 may be configured by an oscillation circuit or the like. Note that the oscillation method of the oscillation unit 319 is arbitrary.
  • the receiving unit 320 performs processing related to reception.
  • the receiving unit 320 can be realized by an arbitrary configuration.
  • the receiving unit 320 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the receiving unit 320 may be configured with an antenna, a receiving circuit, a signal processing circuit, and the like.
  • the clock unit 316 is based on the GNSS signal received by the GNSS receiving unit 312 or the oscillation frequency of the oscillator 314 (the frequency of the signal generated by the oscillator 314).
  • Time information which is information for controlling signal reception is set.
  • the reception control unit 318 (and the reception schedule control unit 317) controls signal reception based on the time information.
  • the receiving unit 320 transmits a reception signal according to the control, that is, at the reception time specified by the time information.
  • This reception time is a time corresponding to the transmission time of the transmission apparatus 101. That is, by doing in this way, even when the reception quality of the GNSS signal is not sufficient, it is possible to suppress a reduction in control accuracy, and thus it is possible to suppress a reduction in communication quality.
  • the clock unit 316 can select a GNSS signal or an oscillation frequency according to the reception status of the GNSS signal, and can set time information using the selected one. Therefore, even when the reception quality of the GNSS signal is not sufficient, a reduction in control accuracy can be suppressed, so that a reduction in communication quality can be suppressed.
  • the clock unit 316 sets time information using the GNSS signal, and when the received GNSS signal is lower in quality than the reference value, Time information can be set using the oscillation frequency. More specifically, when the received GNSS signal is higher in quality than a predetermined reference value, the clock unit 316 sets the time obtained from the GNSS signal as time information, and the received GNSS signal is used as the reference. When the quality is lower than the value, the time obtained by counting at the timing synchronized with the oscillation frequency in the clock counter 315 can be set as the time information. Therefore, even when the reception quality of the GNSS signal is not sufficient, it is possible to suppress a reduction in time control accuracy, and thus it is possible to suppress a reduction in communication quality.
  • the reception control unit 318 controls the reception unit 320 to receive a signal at a reception timing known to a predetermined transmission side based on the time information set by the clock unit 316. Can be made. Therefore, since a signal can be received at a more accurate reception timing, it is possible to suppress a reduction in communication quality.
  • the oscillator 314 oscillates at an oscillation frequency and generates a signal of that frequency.
  • the oscillator 314 supplies the signal to the clock counter 315.
  • the clock counter 315 performs counting at a timing synchronized with the frequency of the signal supplied from the oscillator 314 (that is, the oscillation frequency), and sets a time based on the oscillation frequency (also referred to as an oscillator generation time).
  • the clock counter 315 supplies the oscillator generation time to the clock unit 316.
  • the clock unit 316 can set time information using the oscillator generation time as described above.
  • a clock counter 315 is synchronized with the oscillation frequency provided by the oscillator 314 using the time obtained from the GNSS signal in the correction determination unit 313.
  • the time obtained by counting at the above timing can be corrected.
  • the time based on the oscillation frequency can be made more accurate, so even when the reception quality of the GNSS signal is not sufficient, more accurate time information can be set and the reduction in communication quality can be suppressed. it can.
  • the GNSS receiving unit 312 receives, for example, a GNSS signal.
  • the clock unit 316 can set time information based on the GNSS signal or the oscillation frequency received by the GNSS receiver 312. Further, for example, the correction determination unit 313 determines whether the quality of the GNSS signal received by the GNSS reception unit 312 is sufficiently high based on the reference value set by the reference value setting unit 311. . If it is determined that the GNSS signal is sufficiently high quality, the correction determination unit 313 sets the time (corrected time) based on the GNSS signal received by the GNSS reception unit 312, for example. The correction determination unit 313 supplies the time based on the GNSS signal to the clock counter 315 and the clock unit 316. As described above, the clock unit 316 can generate time information from the time based on this GNSS signal. Further, as described above, the clock counter 315 can correct the time based on the oscillation frequency using the time based on the GNSS signal.
  • the reference value setting unit 311 sets a correction application determination reference value used as a threshold value in the determination by the correction determination unit 313 in step S201.
  • the method for setting the reference value is arbitrary. For example, a predetermined value may be set, may be specified by a user, or may be set according to, for example, an external environment or an internal environment.
  • the reference value setting unit 311 supplies the set correction application determination reference value to the correction determination unit 313.
  • the GNSS receiver 312 receives a GNSS signal.
  • the GNSS signal includes various information such as time information and position information of the navigation satellite that transmitted the GNSS signal.
  • the GNSS receiving unit 312 supplies the information included in the received GNSS signal to the correction determining unit 313 as received information.
  • the correction determination unit 313 determines the quality of the received information.
  • the correction determination unit 313 determines (evaluates) the quality of received information based on information such as the number of satellites that have received GNSS signals, the CNR (Carrier-to-Noise-ratio) of each satellite, the Doppler frequency, altitude, and leap seconds. .
  • step S ⁇ b> 204 the correction determination unit 313 determines whether the quality of the received information is high with the correction application determination reference value set by the reference value setting unit 311 as a threshold value. If the quality of the received information exceeds the correction application determination reference value and it is determined that the quality is sufficiently high, the process proceeds to step S205.
  • step S205 the correction determination unit 313 sets the time based on the GNSS signal (corrected time) using the received information, and supplies the corrected time to the clock counter 315 and the clock unit 316.
  • This correction time is a time based on the time information of the navigation satellite as described above, and is more accurate than the time based on the oscillation frequency. That is, the time includes a correction amount for the time based on the oscillation frequency.
  • step S206 the clock unit 316 sets the corrected time as time information.
  • the clock unit 316 supplies the set time information to the reception schedule control unit 317. If the received GNSS signal is of sufficiently high quality, the corrected time obtained based on the GNSS signal is sufficiently accurate. Therefore, the clock unit 316 can set more accurate time information by using the correct correction time. Therefore, the high sensitivity receiving apparatus 102 can suppress a reduction in communication quality by receiving a signal based on the more accurate time information.
  • step S207 the clock counter 315 corrects its own count value, that is, the oscillator generation time, with the correction time generated by the processing in step S205. Therefore, the clock counter 315 can make the oscillator generation time (count value) more accurate by correcting the oscillator generation time using the correct correction time. Therefore, even when the reception quality of the GNSS signal is not sufficient, the high sensitivity receiving apparatus 102 can set more accurate time information, and can suppress a reduction in communication quality.
  • step S207 ends, the process proceeds to step S210. If it is determined in step S204 that the quality of the received information does not exceed the correction application determination reference value and is not sufficiently high quality (low quality), the process proceeds to step S208.
  • step S208 the clock counter 315 generates an oscillator generation time from the oscillation frequency of the oscillator 314.
  • the clock unit 316 sets the oscillator generation time generated by the process of step S208 as time information. That is, when the reception quality of the GNSS signal is low, the time information is set using the time based on the oscillation frequency generated inside the high sensitivity receiving apparatus 102 without depending on the GNSS signal. Therefore, even when the reception quality of the GNSS signal is not sufficient, the high sensitivity receiving apparatus 102 can suppress a reduction in accuracy of time information due to use of an interpolation formula or the like, and can suppress a reduction in communication quality. .
  • step S210 the reception schedule control unit 317 sets the reception timing for receiving a signal based on the time information supplied from the clock unit 316 and the reception schedule (predetermined reception schedule) corresponding to the known transmission schedule. Set.
  • This reception timing is a timing that is suitable for receiving a signal transmitted at the transmission timing, that is, a timing corresponding to the transmission timing in the transmission apparatus 101.
  • the reception schedule control unit 317 sets the reception timing using the time information set as described above, thereby setting the reception timing to a more accurate time even when the reception quality of the GNSS signal is not sufficient. can do. Therefore, reduction in communication quality can be suppressed.
  • the reception schedule control unit 317 supplies the set reception timing to the reception control unit 318.
  • the reception control unit 318 controls the oscillation unit 319 and the reception unit 320 to receive the transmission signal transmitted from the transmission apparatus 101 at the reception timing set in step S210.
  • the oscillation unit 319 oscillates at a predetermined oscillation frequency (for example, 920 MHz band) under the control of the reception control unit 318, and supplies a signal having the oscillation frequency to the reception unit 320.
  • the reception unit 320 receives a signal at the oscillation frequency of the oscillation unit 319 (that is, receives a signal transmitted at the same frequency as the oscillation frequency of the oscillation unit 319) at the reception timing described above. ).
  • the reception unit 320 can receive a signal at a more accurate reception timing even when the reception quality of the GNSS signal is not sufficient by receiving the signal in this way under the control of the reception control unit 318. Therefore, reduction in communication quality can be suppressed.
  • the receiving unit 320 receives the signal according to the control of the reception control unit 318, so that it is multiplexed even when the reception quality of the GNSS signal is not sufficient. Moreover, it can suppress that the identification accuracy of each signal falls. That is, it is possible to receive a signal in which more signals are multiplexed more accurately. Therefore, reduction in communication quality can be suppressed.
  • the receiving unit 320 extracts identification information, position information, and the like of the transmission device 101 from the received signal and supplies them to the server 104.
  • step S211 When the process of step S211 ends, the reception process ends.
  • the high sensitivity receiving apparatus 102 can suppress a reduction in communication quality.
  • the transmission apparatus 101 can control not only the transmission time as described above but also the transmission frequency in transmission of a transmission signal.
  • frequency division multiplexing is performed as described above, more signals can be multiplexed by improving the frequency control accuracy of the transmission signal.
  • accuracy of about 10 Hz is required for frequency control.
  • the vector of the speed (satellite speed) of the navigation satellite is Vs
  • the Doppler frequency is fd
  • the vector of the receiver speed (receiver speed) is Vu
  • the receiver from the navigation satellite The vector up to is D
  • the relative velocity Vd of the receiver with respect to the navigation satellite can be expressed by the following equation (5) using these.
  • Vd ((Vs-Vu) ⁇ e) (5)
  • the relative velocity Vd of the receiver with respect to the navigation satellite can be expressed by the following equation (6 ).
  • GNSS signals can be received from more than 5 satellites, they can be solved by the least squares method.
  • Such a navigation satellite has a high-precision cesium oscillator, and can obtain a more accurate frequency than an oscillator normally built in a receiver or the like. Therefore, in general, the frequency obtained based on the GNSS signal in the receiver as described above is more accurate than the oscillation frequency of the oscillator built in the receiver (the frequency does not vary).
  • the accuracy of frequency control at the time of signal transmission / reception can be improved. That is, higher quality communication can be realized.
  • reception of GNSS signals is not always good. If the quality of the received GNSS signal is insufficient and the observed satellite speed, Doppler frequency, carrier frequency, etc. contain errors, the accuracy of the oscillator frequency offset of the receiver is also reduced.
  • the receiver uses the interpolation formula to determine the position of the receiver. And determine the receiver time. As a result, the accuracy of the offset of the oscillator frequency of the obtained receiver may be reduced. As a result, the accuracy of frequency control may be reduced. If the accuracy of frequency control is reduced, signals may be mixed in frequency division multiplexing, or reception sensitivity may be reduced due to an increase in signal transmission / reception time errors, which may reduce communication quality.
  • information for controlling transmission of the transmission signal is set based on the GNSS signal or the oscillation frequency of the oscillator, transmission control of the transmission signal is performed based on the set information, and the transmission signal is transmitted according to the transmission control. To send. By doing so, it is possible to suppress a reduction in frequency control accuracy and to suppress a reduction in communication quality.
  • FIG. 9 is a block diagram illustrating a main configuration example of the transmission apparatus 101 when performing frequency control.
  • the transmission apparatus 101 includes a correction determination unit 413 instead of the correction determination unit 213 illustrated in FIG. 4, and replaces the clock counter 215, the clock unit 216, and the transmission schedule control unit 217. Includes an oscillation frequency calculation unit 416.
  • the correction determination unit 413 performs processing related to determination regarding transmission frequency control.
  • the correction determination unit 413 can be realized by an arbitrary configuration.
  • the correction determination unit 413 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the correction determination unit 413 may include a CPU and a memory, and the CPU may execute a program using the memory to perform the above-described processing.
  • the oscillation frequency calculation unit 416 performs processing related to setting of the corrected transmission frequency (transmission frequency including error).
  • the oscillation frequency calculation unit 416 can be realized by an arbitrary configuration.
  • the oscillation frequency calculation unit 416 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the oscillation frequency calculation unit 416 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the oscillation frequency calculation unit 416 is based on the GNSS signal received by the GNSS reception unit 212 or the oscillation frequency of the oscillator 214 (the frequency of the signal generated by the oscillator 214).
  • a transmission control frequency (also referred to as an error-containing transmission frequency) that is information for controlling transmission of a transmission signal is set.
  • the transmission control unit 218 controls transmission of the transmission signal based on the transmission control frequency.
  • the oscillation unit 219 oscillates according to the control, that is, at a transmission frequency based on a designated transmission control frequency, and the transmission unit 220 transmits a transmission signal at the transmission frequency. By doing so, it is possible to suppress a reduction in control accuracy even when the reception quality of the GNSS signal is not sufficient. That is, the transmission signal can be transmitted more accurately at a desired frequency (transmission frequency).
  • this transmission frequency is a frequency known to the receiving side. That is, by doing so, the transmission apparatus 101 can suppress the transmission frequency from deviating from a frequency known to the reception side. That is, the transmission apparatus 101 can enable the high-sensitivity reception apparatus 102 to adjust the reception frequency to the frequency of the transmission signal more accurately.
  • the transmission apparatus 101 can improve frequency control accuracy even when the reception quality of the GNSS signal is not sufficient by performing the above. It is possible to multiplex more signals while suppressing the reduction and preventing the signals from being mixed.
  • the transmission apparatus 101 can suppress a decrease in reception sensitivity of the high sensitivity reception apparatus 102 and can suppress a decrease in communication quality.
  • the oscillation frequency calculation unit 416 can select the GNSS signal or the oscillation frequency according to the reception status of the GNSS signal, and can set the transmission control frequency using the selected one. Therefore, even when the reception quality of the GNSS signal is not sufficient, a reduction in control accuracy can be suppressed, so that a reduction in communication quality can be suppressed.
  • the oscillation frequency calculation unit 416 sets an error-containing transmission frequency using the GNSS signal, and the received GNSS signal has a lower quality than the reference value.
  • the transmission frequency with error can be set using the oscillation frequency. More specifically, when the received GNSS signal is higher in quality than a predetermined reference value, the oscillation frequency calculation unit 416 determines the frequency (oscillation frequency) of the signal supplied from the oscillator 214 as the currently received GNSS. Correction can be performed using the frequency error obtained from the signal, and it can be set as the transmission control frequency.
  • the oscillation frequency calculation unit 416 used the frequency (oscillation frequency) of the signal supplied from the oscillator 214 for the previous correction. Correction can be performed using the correction value, and it can be set as a transmission control frequency. Since the previous correction value is the value obtained when the GNSS signal is high quality, using this value enables more accurate transmission control than when using the correction value obtained from the current low-quality GNSS signal. Frequency is obtained. Therefore, even when the reception quality of the GNSS signal is not sufficient, a reduction in control accuracy can be suppressed, so that a reduction in communication quality can be suppressed.
  • the transmission control unit 218 controls the oscillation unit 219 to oscillate at a transmission frequency based on the transmission control frequency set by the oscillation frequency calculation unit 416. Then, the transmission control unit 218 can control the transmission unit 220 to transmit the transmission signal at the transmission frequency. Therefore, a transmission signal can be transmitted at a more accurate transmission frequency, and a reduction in communication quality can be suppressed.
  • the transmission control unit 218 transmits each signal to be multiplexed by transmitting at a transmission frequency based on the transmission control frequency set by the oscillation frequency calculation unit 416.
  • An accurate frequency can be set.
  • the transmission control unit 218 also performs transmission at a transmission frequency based on the transmission control frequency set by the oscillation frequency calculation unit 416 even when time division multiplexing using chirp modulation is applied to the transmission signal.
  • the bandwidth of each signal can be made narrower. Therefore, it is possible to multiplex more signals while preventing signals from being mixed with each other, and it is possible to suppress a reduction in communication quality.
  • the GNSS receiving unit 212 receives, for example, a GNSS signal.
  • the oscillation frequency calculation unit 416 can set the transmission control frequency based on the GNSS signal or the oscillation frequency received by the GNSS reception unit 212.
  • the correction determination unit 213 determines whether the quality of the GNSS signal received by the GNSS reception unit 212 is sufficiently high based on the reference value set by the reference value setting unit 211, for example. . When determining that the GNSS signal is sufficiently high quality, the correction determination unit 213 sets a frequency (frequency error) based on the GNSS signal received by the GNSS reception unit 212, for example.
  • the correction determination unit 213 supplies the frequency error based on the GNSS signal to the oscillation frequency calculation unit 416.
  • the oscillation frequency calculation unit 416 can generate the transmission control frequency from the frequency error based on the GNSS signal.
  • step S304 when the quality of the received information exceeds the correction application determination reference value and it is determined that the quality is sufficiently high, the process proceeds to step S305.
  • step S305 the correction determination unit 413 sets a frequency (frequency error) based on the GNSS signal using the reception information, and supplies the frequency error to the oscillation frequency calculation unit 416.
  • This frequency error is a correction value based on information such as the satellite speed of the navigation satellite as described above.
  • step S306 the oscillation frequency calculation unit 416 corrects the oscillation frequency obtained in the oscillator 214 with the frequency error set in step S305, and sets the corrected frequency as an error-containing transmission frequency.
  • the oscillation frequency calculation unit 416 supplies the error-containing transmission frequency to the transmission control unit 218.
  • the oscillation frequency calculation unit 416 can set a more accurate error-containing transmission frequency by correcting the oscillation frequency using the accurate frequency error. Therefore, the transmission apparatus 101 can suppress a reduction in communication quality by transmitting a transmission signal at a transmission frequency based on the more accurate error-containing transmission frequency.
  • step S306 ends, the process proceeds to step S308. If it is determined in step S304 that the quality of the received information does not exceed the correction application determination reference value and is not sufficiently high quality (low quality), the process proceeds to step S307.
  • step S307 the oscillation frequency calculation unit 416 corrects the oscillation frequency of the oscillator 214 with the same frequency error as the previous time.
  • the oscillation frequency calculation unit 416 supplies the error-containing transmission frequency to the transmission control unit 218. That is, when the reception quality of the GNSS signal is low, the oscillation frequency is corrected using the frequency error based on the high quality GNSS signal without depending on the low quality GNSS signal. Therefore, even when the reception quality of the GNSS signal is not sufficient, the transmission apparatus 101 can suppress a reduction in frequency accuracy due to the use of an interpolation formula or the like, and can suppress a reduction in communication quality.
  • step S308 the transmission control unit 218 controls the oscillation unit 219 and the transmission unit 220 to transmit the transmission signal at a transmission frequency based on the error-containing transmission frequency obtained by the process of step S306 or step S307.
  • the oscillating unit 219 oscillates at the transmission frequency in accordance with the control of the transmission control unit 218, and supplies a signal having the transmission frequency to the transmission unit 220.
  • the transmission unit 220 generates a transmission signal and transmits the transmission signal at the frequency (transmission frequency) of the signal supplied from the oscillation unit 219 according to the control of the transmission control unit 218.
  • This transmission frequency is a frequency known to the receiving side. Accordingly, the transmission unit 220 can transmit the transmission signal at a more accurate transmission frequency even when the reception quality of the GNSS signal is not sufficient, and thus it is possible to suppress a reduction in communication quality.
  • the method of generating the transmission signal is arbitrary. Further, the content of the transmission signal is also arbitrary. For example, time information, position information, and the like of the transmission apparatus 101 may be included. Further, the transmission signal may be frequency division multiplexed and transmitted. Even in this case, the transmission unit 220 can transmit the transmission signal at a more accurate transmission frequency even when the reception quality of the GNSS signal is not sufficient by transmitting the transmission signal according to the control of the transmission control unit 218. More signals can be multiplexed while the signals are not mixed. Therefore, reduction in communication quality can be suppressed.
  • the transmission signal may be time-division multiplexed using chirp modulation.
  • the transmission unit 220 can further narrow the bandwidth of each signal by transmitting the transmission signal according to the control of the transmission control unit 218. Therefore, more signals can be multiplexed while preventing signals from being mixed. Therefore, reduction in communication quality can be suppressed.
  • step S308 ends, the transmission process ends.
  • the transmission apparatus 101 can suppress a reduction in communication quality.
  • FIG. 11 is a block diagram showing a main configuration example of the high sensitivity receiving apparatus 102 when performing frequency control.
  • the high sensitivity receiving apparatus 102 includes a correction determination unit 513 instead of the correction determination unit 313 in FIG. 6, and includes a clock counter 315, a clock unit 316, and a reception schedule control unit 317. Instead of this, an oscillation frequency calculation unit 516 is provided.
  • the correction determination unit 513 performs processing related to determination regarding reception frequency control.
  • the correction determination unit 513 can be realized by an arbitrary configuration.
  • the correction determination unit 513 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the correction determination unit 513 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the oscillation frequency calculation unit 516 performs processing related to the setting of the corrected reception frequency (reception frequency including error).
  • the oscillation frequency calculation unit 516 can be realized by an arbitrary configuration.
  • the oscillation frequency calculation unit 516 may be configured by a circuit, LSI, system LSI, processor, module, unit, set, device, apparatus, system, or the like. A plurality of them may be combined. At this time, for example, the same type of configuration such as a plurality of circuits and a plurality of processors may be combined, or different types of configurations such as a circuit and an LSI may be combined.
  • the oscillation frequency calculation unit 516 may include a CPU and a memory, and the CPU may execute the above-described processing by executing a program using the memory.
  • the oscillation frequency calculation unit 516 is based on the GNSS signal received by the GNSS reception unit 312 or the oscillation frequency of the oscillator 314 (the frequency of the signal generated by the oscillator 314).
  • a reception control frequency also referred to as an error-containing reception frequency
  • the reception control unit 318 controls reception of a signal (transmitted from the transmission device 101) based on the reception control frequency.
  • the oscillation unit 319 oscillates according to the control, that is, at a reception frequency based on a designated reception control frequency, and the reception unit 320 receives a signal at the reception frequency.
  • this reception frequency is a frequency corresponding to the transmission frequency of the transmission signal transmitted from the transmission apparatus 101 (a frequency known to the transmission side). That is, by doing in this way, the high sensitivity receiving apparatus 102 can suppress that the reception frequency shifts from a frequency suitable for receiving the transmission signal transmitted from the transmission apparatus 101.
  • the high-sensitivity receiving apparatus 102 does not have sufficient reception quality of the GNSS signal as described above. Even if it is a state, it can suppress that the identification accuracy of each multiplexed signal reduces. That is, it is possible to receive a signal in which more signals are multiplexed more accurately. Therefore, reduction in communication quality can be suppressed.
  • the high sensitivity receiving apparatus 102 can suppress the reduction of the reception sensitivity and can suppress the reduction of the communication quality.
  • the oscillation frequency calculation unit 516 can select the GNSS signal or the oscillation frequency according to the reception status of the GNSS signal, and can set the reception control frequency using the selected one. Therefore, even when the reception quality of the GNSS signal is not sufficient, a reduction in control accuracy can be suppressed, so that a reduction in communication quality can be suppressed.
  • the oscillation frequency calculation unit 516 sets an error-containing reception frequency using the GNSS signal, and the received GNSS signal has a lower quality than the reference value.
  • the error-containing reception frequency can be set using the oscillation frequency. More specifically, when the received GNSS signal is higher in quality than a predetermined reference value, the oscillation frequency calculation unit 516 determines the frequency (oscillation frequency) of the signal supplied from the oscillator 314 as the currently received GNSS. Correction is performed using a frequency error obtained from the signal, and it can be set as a reception control frequency.
  • the oscillation frequency calculation unit 516 used the frequency (oscillation frequency) of the signal supplied from the oscillator 314 for the previous correction. Correction can be performed using the correction value, and it can be set as a reception control frequency. Since the previous correction value is the value obtained when the GNSS signal is high quality, using this value enables more accurate reception control than when using the correction value obtained from the current low-quality GNSS signal. Frequency is obtained. Therefore, even when the reception quality of the GNSS signal is not sufficient, a reduction in control accuracy can be suppressed, so that a reduction in communication quality can be suppressed.
  • the reception control unit 318 can control the oscillation unit 319 to oscillate at a reception frequency based on the reception control frequency set by the oscillation frequency calculation unit 516.
  • the reception control unit 318 can control the reception unit 320 to receive a signal at the reception frequency. Therefore, a signal can be received at a more accurate reception frequency, and a reduction in communication quality can be suppressed.
  • the reception control unit 318 also has an oscillation frequency calculation unit 516 when the received signal is frequency division multiplexed or when time division multiplexing using chirp modulation is applied to the received signal.
  • the GNSS receiving unit 312 receives, for example, a GNSS signal.
  • the oscillation frequency calculator 516 can set the reception control frequency based on the GNSS signal or the oscillation frequency received by the GNSS receiver 312. Further, the correction determination unit 513 determines, for example, whether or not the quality of the GNSS signal received by the GNSS reception unit 312 is sufficiently high based on the reference value set by the reference value setting unit 311. . If it is determined that the GNSS signal is sufficiently high quality, the correction determination unit 513 sets a frequency (frequency error) based on the GNSS signal received by the GNSS reception unit 312, for example. The correction determination unit 513 supplies the frequency error based on the GNSS signal to the oscillation frequency calculation unit 516. As described above, the oscillation frequency calculator 516 can generate the reception control frequency from the frequency error based on the GNSS signal.
  • step S404 if the quality of the received information exceeds the correction application determination reference value and it is determined that the quality is sufficiently high, the process proceeds to step S405.
  • step S405 the correction determination unit 513 sets a frequency (frequency error) based on the GNSS signal using the received information, and supplies the frequency error to the oscillation frequency calculation unit 516.
  • This frequency error is a correction value based on information such as the satellite speed of the navigation satellite as described above.
  • step S406 the oscillation frequency calculation unit 516 corrects the oscillation frequency obtained in the oscillator 314 with the frequency error set in step S405, and sets the corrected frequency as an error-containing reception frequency.
  • the oscillation frequency calculation unit 516 supplies the reception frequency with error to the reception control unit 318.
  • the oscillation frequency calculation unit 516 can set a more accurate error-containing reception frequency by correcting the oscillation frequency using the accurate frequency error. Therefore, the high sensitivity receiving apparatus 102 can suppress a reduction in communication quality by receiving a signal at a reception frequency based on the more accurate error-containing reception frequency.
  • step S406 ends, the process proceeds to step S408. If it is determined in step S404 that the quality of the received information does not exceed the correction application determination reference value and is not sufficiently high quality (low quality), the process proceeds to step S407.
  • the oscillation frequency calculator 516 corrects the oscillation frequency of the oscillator 314 with the same frequency error as the previous time. That is, when the reception quality of the GNSS signal is low, the oscillation frequency is corrected using the frequency error based on the high quality GNSS signal without depending on the low quality GNSS signal. Therefore, even when the reception quality of the GNSS signal is not sufficient, the high sensitivity receiving apparatus 102 can suppress a reduction in accuracy of time information due to use of an interpolation formula or the like, and can suppress a reduction in communication quality. .
  • step S408 the reception control unit 318 controls the oscillation unit 319 and the reception unit 320 to receive a signal at a reception frequency based on the error-containing reception frequency obtained by the process of step S406 or step S407.
  • the oscillation unit 319 oscillates at the reception frequency under the control of the reception control unit 318, and supplies a signal having the reception frequency to the reception unit 320.
  • the reception unit 320 receives a signal at the frequency (reception frequency) of the signal supplied from the oscillation unit 319 according to the control of the reception control unit 318 (that is, a signal transmitted at the same frequency as the oscillation frequency of the oscillation unit 319). Receive).
  • the reception unit 320 can receive a signal at a more accurate reception frequency even when the reception quality of the GNSS signal is not sufficient by receiving the signal in this way under the control of the reception control unit 318. Therefore, reduction in communication quality can be suppressed.
  • the reception unit 320 When frequency division multiplexing, time division multiplexing using chirp modulation, or the like is applied to the received signal, the reception unit 320 receives the signal according to the control of the reception control unit 318, thereby receiving the GNSS signal. Even if the quality is not sufficient, it is possible to suppress a reduction in the identification accuracy of each multiplexed signal. That is, it is possible to receive a signal in which more signals are multiplexed more accurately. Therefore, reduction in communication quality can be suppressed.
  • the receiving unit 320 extracts identification information, position information, and the like of the transmission device 101 from the received signal and supplies them to the server 104.
  • step S408 ends, the reception process ends.
  • the high sensitivity receiving apparatus 102 can suppress a reduction in communication quality.
  • the present technology may be applied only to the transmission apparatus 101, may be applied only to the high sensitivity reception apparatus 102, or may be applied to both the transmission apparatus 101 and the high sensitivity reception apparatus 102. May be. Further, the present technology may be applied to a transmission / reception device having a transmission function and a reception function. In this case, the present technology may be applied only to the transmission function, may be applied only to the reception function, or may be applied to both the transmission function and the reception function.
  • the transmission apparatus 101 may perform both time control and frequency control for signal transmission.
  • the present technology may be applied only to time control, may be applied only to frequency control, or may be applied to both time control and frequency control.
  • the high sensitivity receiving apparatus 102 may perform both time control and frequency control for signal reception.
  • the present technology may be applied only to time control, may be applied only to frequency control, or may be applied to both time control and frequency control.
  • the position notification system 100 has been described as an example, but the present technology can be applied to any communication system.
  • the transmission apparatus 101 may be installed not only on a person but also on a moving body.
  • the present technology can also be applied to an anti-theft system 800 for preventing theft of automobiles, motorcycles and the like as shown in FIG.
  • the transmission apparatus 101 is installed in an object whose position is monitored by the user, for example, an automobile 801 or a motorcycle 802 owned by the user.
  • the transmission apparatus 101 notifies the high-sensitivity reception apparatus 102 of its own position information (that is, position information of the automobile 801 and the motorcycle 802) as appropriate. That is, as in the case of the position notification system 100, the user can access the server 104 from the terminal device 105 and grasp the positions of the automobile 801 and the motorcycle 802. Therefore, since the user can grasp the positions of the automobile 801 and the motorcycle 802 even if the user is stolen, the user can easily retrieve the automobile 801 and the motorcycle 802.
  • Position information that is, position information of the automobile 801 and the motorcycle 802
  • the high sensitivity receiving apparatus 102 can be more accurately notified to the high sensitivity receiving apparatus 102. That is, even when the user is stolen, the user can easily and accurately grasp the positions of the automobile 801 and the motorcycle 802.
  • the transmission apparatus 101 may transmit transmission information including identification information such as images, sounds, measurement data, devices, parameter setting information, or control information such as commands.
  • the transmission information may include a plurality of types of information such as an image and sound, identification information, setting information, and control information.
  • the transmission apparatus 101 may be able to transmit transmission information including information supplied from another apparatus, for example.
  • the transmission device 101 may have an image, light, brightness, saturation, electricity, sound, vibration, acceleration, speed, angular velocity, force, temperature (not temperature distribution), humidity, distance, area, volume, shape, flow rate, Generate and send transmission information including information (sensor output) output from various sensors that perform detection or measurement for any variable such as time, time, magnetism, chemical substance, or odor, or the amount of change. You may make it do.
  • the present technology for example, three-dimensional shape measurement, spatial measurement, object observation, moving deformation observation, biological observation, authentication processing, monitoring, autofocus, imaging control, illumination control, tracking processing, input / output control, electronic device control,
  • the present invention can be applied to a system used for any application such as actuator control.
  • the present technology can be applied to a system in an arbitrary field such as traffic, medical care, crime prevention, agriculture, livestock industry, mining, beauty, factory, home appliance, weather, and nature monitoring.
  • the present technology can also be applied to a system that captures an image for viewing using a digital camera, a portable device with a camera function, or the like.
  • this technology monitors in-vehicle systems, traveling vehicles, and roads that photograph the front, rear, surroundings, and interiors of automobiles for safe driving such as automatic stop and recognition of the driver's condition.
  • the present invention can also be applied to a system used for traffic, such as a surveillance camera system that performs a distance measurement between vehicles or the like.
  • the present technology can also be applied to a system provided for security using a security camera for surveillance purposes, a camera for personal authentication purposes, or the like.
  • the present technology can also be applied to a system provided for sports using various sensors that can be used for sports applications such as a wearable camera.
  • the present technology can also be applied to a system used for agriculture using various sensors such as a camera for monitoring the state of a field or crop.
  • the present technology can also be applied to a system used for livestock industry that uses various sensors for monitoring the state of livestock such as pigs and cows.
  • the present technology can be applied to systems that monitor natural conditions such as volcanoes, forests, and oceans, meteorological observation systems that observe weather, temperature, humidity, wind speed, sunshine hours, and so on, such as birds, fish, and reptiles. It can also be applied to a system for observing the ecology of wildlife such as moss, amphibians, mammals, insects and plants.
  • Radio signal and information transmitted / received is arbitrary.
  • an example in which the present technology is applied to the transmission device 101 and the high-sensitivity receiving device 102 has been described. Can do. That is, the present technology can be applied to any communication device or communication system.
  • ⁇ Computer> The series of processes described above can be executed by hardware or can be executed by software. Also, some processes can be executed by hardware, and other processes can be executed by software.
  • a program constituting the software is installed in the computer.
  • the computer includes, for example, a general-purpose personal computer that can execute various functions by installing a computer incorporated in dedicated hardware and various programs.
  • FIG. 14 is a block diagram showing an example of a hardware configuration of a computer that executes the above-described series of processing by a program.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random Access Memory
  • An input / output interface 910 is also connected to the bus 904.
  • An input unit 911, an output unit 912, a storage unit 913, a communication unit 914, and a drive 915 are connected to the input / output interface 910.
  • the input unit 911 includes, for example, a keyboard, a mouse, a microphone, a touch panel, an input terminal, and the like.
  • the output unit 912 includes, for example, a display, a speaker, an output terminal, and the like.
  • the storage unit 913 includes, for example, a hard disk, a RAM disk, a nonvolatile memory, and the like.
  • the communication unit 914 includes a network interface, for example.
  • the drive 915 drives a removable medium 921 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
  • the CPU 901 loads the program stored in the storage unit 913 into the RAM 903 via the input / output interface 910 and the bus 904 and executes the program, for example. Is performed.
  • the RAM 903 also appropriately stores data necessary for the CPU 901 to execute various processes.
  • the program executed by the computer can be recorded and applied to, for example, a removable medium 921 as a package medium or the like.
  • the program can be installed in the storage unit 913 via the input / output interface 910 by attaching the removable medium 921 to the drive 915.
  • This program can also be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
  • the program can be received by the communication unit 914 and installed in the storage unit 913.
  • this program can be installed in the ROM 902 or the storage unit 913 in advance.
  • Embodiments of the present technology are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present technology.
  • the present technology may be applied to any configuration that constitutes an apparatus or system, for example, a processor as a system LSI (Large Scale Integration), a module that uses a plurality of processors, a unit that uses a plurality of modules, etc. It can also be implemented as a set or the like to which functions are added (that is, a partial configuration of the apparatus).
  • a processor as a system LSI (Large Scale Integration)
  • a module that uses a plurality of processors
  • a unit that uses a plurality of modules etc.
  • It can also be implemented as a set or the like to which functions are added (that is, a partial configuration of the apparatus).
  • the system means a set of a plurality of constituent elements (devices, modules (parts), etc.), and it does not matter whether all the constituent elements are in the same casing. Accordingly, a plurality of devices housed in separate housings and connected via a network and a single device housing a plurality of modules in one housing are all systems. .
  • the configuration described as one device (or processing unit) may be divided and configured as a plurality of devices (or processing units).
  • the configurations described above as a plurality of devices (or processing units) may be combined into a single device (or processing unit).
  • a configuration other than that described above may be added to the configuration of each device (or each processing unit).
  • a part of the configuration of a certain device (or processing unit) may be included in the configuration of another device (or other processing unit). .
  • the present technology can take a configuration of cloud computing in which one function is shared and processed by a plurality of devices via a network.
  • the above-described program can be executed in an arbitrary device.
  • the device may have necessary functions (functional blocks and the like) so that necessary information can be obtained.
  • each step described in the above flowchart can be executed by one device or can be executed by a plurality of devices.
  • the plurality of processes included in the one step can be executed by being shared by a plurality of apparatuses in addition to being executed by one apparatus.
  • a plurality of processes included in one step can be executed as a process of a plurality of steps.
  • the processing described as a plurality of steps can be collectively executed as one step.
  • the program executed by the computer may be such that the processing of steps describing the program is executed in time series in the order described in this specification, or in parallel or when a call is made. It may be executed individually at the required timing. That is, as long as no contradiction occurs, the processing of each step may be executed in an order different from the order described above. Furthermore, the processing of the steps describing this program may be executed in parallel with the processing of other programs, or may be executed in combination with the processing of other programs.
  • the present technology can also have the following configurations.
  • a setting unit that sets information for controlling transmission of a transmission signal based on the GNSS signal or the oscillation frequency of the oscillator;
  • a transmission control unit for controlling transmission of the transmission signal based on the information set by the setting unit;
  • a transmission unit configured to transmit the transmission signal according to the control of the transmission control unit.
  • the setting unit When the received GNSS signal is higher quality than a predetermined reference value, the information is set using the GNSS signal, The transmission device according to (2), wherein when the received GNSS signal is lower in quality than the reference value, the information is set using the oscillation frequency.
  • the information includes time information, The setting unit If the received GNSS signal is higher quality than a predetermined reference value, set the time obtained from the GNSS signal as the time information, The transmission according to (3), wherein when the received GNSS signal is lower in quality than the reference value, a time obtained by counting at a timing synchronized with the oscillation frequency is set as the time information. apparatus.
  • the transmission control unit controls the transmission unit to transmit the transmission signal to a predetermined reception side at a known transmission timing based on the time information set by the setting unit. 4) The transmission apparatus according to 4). (6) When the received GNSS signal is higher in quality than a predetermined reference value, the setting unit is obtained by counting at a timing synchronized with the oscillation frequency using a time obtained from the GNSS signal. The transmission device according to (4) or (5), wherein the time is corrected. (7) The information includes a transmission control frequency, The setting unit When the received GNSS signal is higher in quality than a predetermined reference value, the oscillation frequency is corrected using a frequency obtained from the GNSS signal received this time, and the corrected oscillation frequency is used for the transmission control.
  • the oscillation frequency is corrected with a previous correction value, and the corrected oscillation frequency is set as the transmission control frequency.
  • (10) Based on the GNSS signal or the oscillation frequency of the oscillator, set the information to control the transmission of the transmission signal, Based on the set information, performs transmission control of the transmission signal, A transmission method for transmitting the transmission signal according to the transmission control.
  • (11) Based on the GNSS signal or the oscillation frequency of the oscillator, a setting unit that sets information for controlling reception of a signal transmitted from the transmission side; A reception control unit for controlling reception of the signal based on the information set by the setting unit; A receiving unit configured to receive the signal in accordance with control of the reception control unit.
  • (12) The receiving device according to (11), wherein the setting unit selects the GNSS signal or the oscillation frequency according to a reception state of the GNSS signal, and sets the information using the selected one.
  • the setting unit includes: When the received GNSS signal is higher quality than a predetermined reference value, the information is set using the GNSS signal, The receiving device according to (12), wherein when the received GNSS signal is lower in quality than the reference value, the information is set using the oscillation frequency. (14) The information includes time information, The setting unit If the received GNSS signal is higher quality than a predetermined reference value, set the time obtained from the GNSS signal as the time information, The reception according to (13), wherein when the received GNSS signal is lower in quality than the reference value, a time obtained by counting at a timing synchronized with the oscillation frequency is set as the time information. apparatus.
  • the reception control unit controls the reception unit to cause the transmission side to receive the signal at a known reception timing based on the time information set by the setting unit. ).
  • the setting unit is obtained by counting at a timing synchronized with the oscillation frequency using a time obtained from the GNSS signal.
  • the receiving device according to (14) or (15), wherein the time is corrected.
  • the information includes a reception control frequency, The setting unit When the received GNSS signal is higher in quality than a predetermined reference value, the oscillation frequency is corrected using a frequency obtained from the currently received GNSS signal, and the corrected oscillation frequency is used for the reception control.
  • the oscillation frequency is corrected with a previous correction value, and the corrected oscillation frequency is set as the reception control frequency.
  • the reception control unit controls the reception unit to receive the signal at a reception frequency based on the reception control frequency set by the setting unit.
  • the setting unit is configured to set the information based on the GNSS signal received by the GNSS receiving unit or the oscillation frequency.
  • 100 position notification system 101 transmitting device, 102 high sensitivity receiving device, 103 network, 104 server, 111 elderly person, 211 reference value setting unit, 212 GNSS receiving unit, 213 correction judging unit, 214 oscillator, 215 clock counter, 216 clock Section, 217 transmission schedule control section, 218 transmission control section, 219 oscillation section, 220 transmission section, 311 reference value setting section, 312 GNSS reception section, 313 correction judgment section, 314 oscillator, 315 clock counter, 316 clock section, 317 reception Schedule control unit, 318 reception control unit, 319 oscillation unit, 320 reception unit, 413 correction judgment unit, 416 oscillation frequency calculation unit, 513 correction judgment unit, 516 oscillation frequency performance Department, 800 anti-theft system

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Electric Clocks (AREA)
  • Transmitters (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

La présente technologie concerne un dispositif d'émission, un procédé d'émission, un dispositif de réception et un procédé de réception grâce auxquels la détérioration de qualité des communications peut être éliminée. Selon la présente invention, des informations permettant de commander l'émission d'un signal d'émission sont établies sur la base d'un signal GNSS ou de la fréquence d'oscillation d'un oscillateur, la commande d'émission du signal d'émission est effectuée sur la base des informations ainsi établies et le signal d'émission est émis selon la commande d'émission. En variante, sur la base du signal GNSS ou de la fréquence d'oscillation de l'oscillateur, des informations permettant de commander la réception d'un signal émis depuis le côté d'émission sont définies, la commande de réception du signal est effectuée sur la base des informations ainsi établies et le signal est reçu en fonction de la commande de réception. La présente invention peut s'appliquer, par exemple, à des dispositifs d'émission, à des dispositifs de réception, à des dispositifs d'émission/réception, à des dispositifs de communication, à des dispositifs de traitement d'informations, à des appareils électroniques, à des ordinateurs, à des programmes, à des supports d'enregistrement et à des systèmes.
PCT/JP2018/009152 2017-03-23 2018-03-09 Dispositif d'émission, procédé d'émission, dispositif de réception et procédé de réception WO2018173795A1 (fr)

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