JP2020028009A - Communication estimation device, program for causing computer to execute, and computer-readable recording medium with program recorded - Google Patents

Abstract

To provide a communication estimation device that estimates a communication scheme or a modulation scheme of a primary user and a secondary user.SOLUTION: A communication estimation device 1 includes reception means 11, storage means 12, and communication estimation means 13. The reception means 11 receives sample data for a certain time including reception power, a reception signal, a frequency of the reception signal, and identification information on a transmission source from a plurality of terminal devices. The storage means 12 stores multiple pieces of sample data from the plurality of terminal devices received by the reception means. The communication estimation means 13 executes first estimation processing of estimating a communication scheme or a modulation scheme of a primary user and a secondary user on the basis of the multiple pieces of sample data stored in the storage means.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a communication estimation device, a program to be executed by a computer, and a computer-readable recording medium storing the program.

  In order to satisfy various communication performance requirements in the fifth generation mobile communication system, further frequency resources are required. Among them, a technology for sharing a frequency that is not used at a time or a place has attracted attention (Non-Patent Document 1). In order to share the frequency, it is necessary to grasp the usage status of the primary user sequentially so as not to interfere with the existing wireless system (primary user). On the other hand, a system for estimating the usage status (power distribution) of a primary user using a mobile device as a sensor terminal has been proposed (Non-Patent Document 2).

Ministry of Internal Affairs and Communications, “Radio Policy 2020 Roundtable Report”, June 2016. Matsuno, et al., "Efforts for frequency sharing between different wireless systems in 5G mobile communication systems," IEICE, RCS116, Oct. 2016.

  However, an error may occur in the received power depending on the communication system or the modulation system. Therefore, the method of estimating the usage status (power distribution) of the primary user described in Non-Patent Document 2 describes the primary usage. It is difficult to accurately estimate a user's use situation (power distribution).

  Therefore, according to an embodiment of the present invention, there is provided a communication estimating apparatus for estimating a communication method or a modulation method of a primary user and a secondary user.

  Further, according to the embodiment of the present invention, there is provided a program for causing a computer to estimate a communication method or a modulation method of a primary user and a secondary user.

  Further, according to the embodiment of the present invention, there is provided a computer-readable recording medium storing a program for causing a computer to estimate a communication method or a modulation method of a primary user and a secondary user.

(Configuration 1)
According to an embodiment of the present invention, a communication estimating device includes a receiving unit, a storage unit, and a communication estimating unit. The receiving means receives, from a plurality of terminal devices, sample data for a predetermined time including received power, a received signal, a frequency of the received signal, and identification information of a transmission source. The storage unit stores the plurality of sample data of the plurality of terminal devices received by the receiving unit. The communication estimating means executes a first estimating process for estimating a communication method or a modulation method of the primary user and the secondary user based on the plurality of sample data stored in the storage means.

  (Configuration 2)

  In the configuration 1, the communication estimating unit may be configured to perform, in the first estimation process, when the identification information of the transmission source included in the sample data from one terminal device is the identification information of a plurality of primary users. And when the communication scheme of the secondary user is time-division duplex, and when the first received power among a plurality of received powers included in the sample data from one terminal device is shifted in frequency, 1 It is estimated that the modulation scheme of the secondary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation, and when the fluctuation width of a plurality of reception powers included in the sample data from one terminal device is equal to or smaller than the threshold value. At one time, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation, and the variation width of a plurality of reception powers included in sample data from one terminal device is one. When more than twice the confidence No. power in the terminal device, the modulation scheme of the primary user and the secondary user is estimated to be OFDM modulated or AM modulation or ASK modulation.

(Configuration 3)
In the configuration 2, when the communication estimating means estimates that the modulation scheme of the primary user and the secondary user is OFDM modulation, AM modulation, or ASK modulation, the communication estimating means further calculates the autocorrelation of the received signal, and performs the calculation. When the obtained autocorrelation consists of two peaks that appear periodically, it is estimated that the modulation scheme of the primary user and the secondary user is OFDM modulation, and when the autocorrelation does not consist of two peaks that appear periodically, It is estimated that the modulation scheme of the primary user and the secondary user is AM modulation or ASK modulation.

(Configuration 4)
In the configuration 2, when the communication estimating means estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation, the communication estimating means further calculates the autocorrelation of the received signal, and performs the calculation. When the obtained autocorrelation consists of one peak that appears periodically, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, and when the autocorrelation does not consist of one peak that appears periodically, It is estimated that the modulation scheme of the primary user and the secondary user is FM modulation or FSK modulation.

(Configuration 5)
In the configuration 2, when the communication estimating means estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation, the communication estimating means further calculates an autocorrelation of the received signal, and calculates the calculated autocorrelation. Is assumed to consist of one peak that appears periodically, the primary user and the secondary user are assumed to use CDMA modulation, and if the autocorrelation does not consist of one peak that appears periodically, the primary usage is assumed. It is estimated that the modulation scheme of the user and the secondary user is PSK modulation.

(Configuration 6)
In any one of the configurations 2 to 5, the communication estimating means may be configured such that, in the first estimating process, the communication method of the primary user and the secondary user is not time division duplex, and the primary user and the secondary user When the modulation scheme of the secondary user is not any of OFDM modulation, AM modulation, ASK modulation, CDMA modulation, FM modulation, FSK modulation, and PSK modulation, it is determined that the communication scheme of the primary user is the cellular scheme or television broadcasting. presume.

(Configuration 7)
In any one of Configurations 1 to 6, the storage unit further stores a database in which a frequency band, a communication method, a modulation method, and a system bandwidth are associated with each other. The communication estimating means executes a second estimating process for estimating the communication method or the modulation method of the primary user and the secondary user based on the database stored in the storage means in addition to the first estimating process. .

(Configuration 8)
In the configuration 7, the communication estimating means detects the communication system or the modulation system corresponding to the frequency band and the system bandwidth based on the database in the second estimation process to thereby perform communication between the primary user and the secondary user. Estimate the scheme or modulation scheme.

(Configuration 9)
Further, according to the embodiment of the present invention, the program causes the receiving means to receive, from a plurality of terminal devices, sample data for a predetermined time including the received power, the received signal, the frequency of the received signal, and the identification information of the transmission source. A first step, a second step in which the storage means stores a plurality of sample data of the plurality of terminal devices received by the reception means, and a communication estimation means in which the communication estimation means stores the plurality of sample data stored in the storage means. And a third step of executing a first estimation process for estimating a communication scheme or a modulation scheme of the primary user and the secondary user based on the third step.

(Configuration 10)
In the ninth aspect, the communication estimating means may be configured such that, in the first estimating process of the third step, the identification information of the transmission source included in the sample data from one terminal device is the identification information of a plurality of primary users. , It is estimated that the communication method of the primary user and the secondary user is time division duplex, and the first received power among a plurality of received powers included in the sample data from one terminal device shifts in frequency. , It is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation, and the fluctuation width of the plurality of reception powers included in the sample data from one terminal device is When the difference is equal to or less than the threshold value, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation, and a plurality of reception powers included in the sample data from one terminal device are determined. When the width of the variation is more than twice confidence No. power in one terminal device, modulation method of the primary user and the secondary user is estimated to be OFDM modulated or AM modulation or ASK modulation.

(Configuration 11)
In the configuration 10, when the communication estimating unit estimates that the modulation scheme of the primary user and the secondary user is OFDM modulation, AM modulation, or ASK modulation in the third step, the communication estimating unit further performs autocorrelation of the received signal. Is calculated, and when the calculated autocorrelation consists of two peaks that appear periodically, it is estimated that the modulation scheme of the primary user and the secondary user is OFDM modulation, and the autocorrelation appears periodically. When there are no peaks, it is estimated that the modulation scheme of the primary user and the secondary user is AM modulation or ASK modulation.

(Configuration 12)
In the configuration 10, when the communication estimating unit estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation in the third step, the communication estimating unit further performs autocorrelation of the received signal. Is calculated, and when the calculated autocorrelation consists of one peak that appears periodically, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, and that the autocorrelation appears periodically. When there are no peaks, it is estimated that the modulation scheme of the primary user and the secondary user is FM modulation or FSK modulation.

(Configuration 13)
In the configuration 10, when the communication estimating unit estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation in the third step, the communication estimating means further calculates the autocorrelation of the received signal. When the calculated autocorrelation consists of one peak that appears periodically, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, and from the one peak that the autocorrelation appears periodically. If not, it is estimated that the modulation scheme of the primary user and the secondary user is PSK modulation.

(Configuration 14)
In any one of the constitutions 10 to 13, the communication estimating means may be configured such that, in the first estimation processing of the third step, the communication method of the primary user and the secondary user is not time division duplex, and When the modulation method of the secondary user and the secondary user is not any of OFDM modulation, AM modulation, ASK modulation, CDMA modulation, FM modulation, FSK modulation and PSK modulation, the communication method of the primary user is a cellular system or a television. Presumed to be John Broadcasting.

(Configuration 15)
In any one of the constitutions 9 to 14, the storage means may further store, in the second step, a database in which a frequency band, a communication method, a modulation method and a system bandwidth are associated with each other, In the step, a second estimation process for estimating the communication method or the modulation method of the primary user and the secondary user based on the database stored in the storage means is executed in addition to the first estimation process.

(Configuration 16)
In the configuration 15, in the second estimation processing of the third step, the communication estimating unit detects the communication system or the modulation system corresponding to the frequency band and the system bandwidth based on the database, thereby detecting the primary user and the secondary user. Estimate the communication scheme or modulation scheme of the next user.

(Configuration 17)
Further, according to the embodiment of the present invention, the recording medium is a computer-readable recording medium that records the program according to any one of Configurations 9 to 16.

  The communication method or modulation method of the primary user and the secondary user can be estimated.

FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention. It is the schematic of the communication estimation apparatus shown in FIG. It is a figure showing the relation between frequency and electric power. FIG. 4 is a diagram for explaining a communication method and a modulation method estimation method. It is a conceptual diagram of an autocorrelation. It is another conceptual diagram of an autocorrelation. It is a schematic diagram of database DB1. 3 is a flowchart for explaining the operation of the communication estimation device shown in FIG. 1. 9 is a flowchart illustrating a detailed operation of step S8 in FIG. 9 is a flowchart illustrating a detailed operation of step S10 in FIG. 8. 9 is a flowchart illustrating a detailed operation of step S12 in FIG. 6 is a flowchart for explaining another operation of the communication estimation device shown in FIG. 1. FIG. 2 is a schematic diagram of a communication estimation device having a function of estimating a wave source position. It is a flowchart for demonstrating the operation | movement which estimates a wave source position. 15 is a flowchart illustrating a detailed operation of step S33 in FIG. It is a flowchart for demonstrating another operation | movement which estimates a wave source position. It is a flowchart for demonstrating another operation | movement which estimates a wave source position. 1 is a schematic diagram of a communication estimation device having a function of estimating a communication range. It is a flowchart for demonstrating the operation | movement which estimates the communication range of a primary user and a secondary user. FIG. 3 is a schematic diagram of a communication estimation device having a function of setting a sharing condition. It is a conceptual diagram of another database. It is a figure showing the relation between accumulation probability and signal strength. FIG. 9 is a diagram for explaining a method of correcting a communication range of a primary user. FIG. 9 is a diagram for explaining a method of correcting a communication range of a secondary user. FIG. 9 is a conceptual diagram of a corrected communication range. FIG. 7 is a diagram for explaining a method of determining whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other. It is a key map of the table showing the judgment result of the presence or absence of the interference between the wireless communication of the primary user and the wireless communication of the secondary user. It is a figure which shows the correction | amendment communication range of a primary user and the correction | amendment communication range of a secondary user. 21 is a flowchart for explaining the operation of the communication estimation device shown in FIG. 20. FIG. 4 is a diagram for explaining a method of calculating a reception SINR. 30 is a flowchart for describing a detailed operation of step S63 in FIG. 29 when the reception SINR is used. It is a figure which shows another shape of the communication range of a primary user and a secondary user. An index indicating the communication range (or the corrected communication range) of the primary user and the secondary user when the communication range (or the corrected communication range) of the primary user and the secondary user has an arbitrary shape will be described. FIG.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions have the same reference characters allotted, and description thereof will not be repeated.

  FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention. Referring to FIG. 1, a wireless communication system 10 according to an embodiment of the present invention includes a communication estimating device 1, a plurality of terminal devices 2 and 6, base stations 3 and 4, a plurality of sensors 5, and a plurality of sensors 5. The robot includes a robot 7 and a wired cable 8.

  The plurality of terminal devices 2 and 6, the base stations 3 and 4, the plurality of sensors 5, and the plurality of robots 7 are arranged in a wireless communication space. In FIG. 1, a wave source S is a primary user to whom a frequency band has already been assigned, and includes, for example, a radar and a broadcasting station. The plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7 are secondary users. The terminal device 2 is a mobile terminal such as a smartphone, for example. The terminal device 6 is, for example, a terminal device that performs telemetry. More specifically, the terminal device 6 collects data of a remote measuring instrument or the like using a communication line. The sensor 5 is, for example, a fixed sensor.

The communication estimation device 1 is connected to the base station 3 via a cable 8. The communication estimation device 1 receives the sample data D _{SPL —} i (sample data in a certain time) in each of the plurality of terminal devices 2 and 6, the plurality of sensors 5, and the plurality of robots 7 from the base station 3 via the wired cable 8. I do.

The sample data D _{SPL —} i includes the identification information ID _i of the terminal device (any of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7), and J (J is an integer of 2 or more) includes receiving information INFO _R _1~INFO _R _J, a J number of transmitting information INFO _T _1~INFO _T _J.

The reception information INFO _{R —} j (j is an integer satisfying 2 ≦ j ≦ J) is the identification information ID _{SRC —} j of the transmission source, the reception time t _{Ri —} j, the reception signal S _{Ri —} j, and the reception signal S _{Ri —} j. received power RSSI _i _j, and the frequency _f Ri _j of the received signal _S Ri _j, terminal device having the identification information ID _i of (any one of the plurality of terminal devices 2, 6, a plurality of sensors 5 and a plurality of robots 7) position information _{[x i, y} i] and a.

Terminal transmission information INFO _T _j is, having a destination identification information _{ID DES} _j, a transmission time _t Ti _j, the transmission signal _S Ti _j, the frequency _f Ti _j of the transmission signal _S Ti _j, the identification information ID _i device location information _{[x i, y} i] of (the plurality of terminal devices 2, 6, any one of a plurality of sensors 5 and a plurality of robots 7) a.

Thus, the sample data _{D SPL} _i _{is, D SPL _i = [ID i} / {ID SRCi _1 / t Ri _1 / S Ri _1 / RSSI i _1 / [x i, y i] / f Ri _1}, {ID SRCi _{_2 / t Ri _2 / S Ri} _2 / RSSI i _2 / [x i, y i] / f Ri _2}, ···, {ID SRCi _J / t Ri _J / S Ri _J / RSSI i _J / [x _{i, y i] / f Ri} _J} / {ID DESi _1 / t Ti _1 / S Ti _1 / [x i, y i] / f Ti _1}, {ID DESi _2 / t Ti _2 / S Ti _2 / _{[x i, y i] /} f Ti _2}, ···, consists _{{ID DESi _J / t Ti _J} / S Ti _J / [x i, y i] / f Ti _J}].

The base station 3 receives the sample data D _{SPL —} i from the terminal device (any of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7), and estimates the received sample data D _{SPL —} i by communication. Transmit to the device 1. Further, the base station 3 receives the sample data D _{SPL —} i from the base station 4 and transmits the received sample data D _{SPL —} i to the communication estimation device 1.

The base station 4 receives the sample data D _{SPL —} i from the terminal device (any of the plurality of terminal devices 2 and 6, the plurality of sensors 5, and the plurality of robots 7), and transmits the received sample data D _{SPL —} i to the base station. Send to 4.

Based on the sample data D _{SPL —} i, the communication estimating apparatus 1 uses a method described later to determine the primary user (at least one of the wave source S and the base stations 3 and 4; the same applies hereinafter) and the secondary user ( A communication method or a modulation method with at least one of the plurality of terminal devices 2 and 6, the plurality of sensors 5, and the plurality of robots 7;

  FIG. 2 is a schematic diagram of the communication estimation device 1 shown in FIG. Referring to FIG. 2, communication estimating apparatus 1 includes receiving means 11, storage means 12, and communication estimating means 13.

The receiving unit 11 receives the sample data D _{SPL —} i from the base station 3 and stores the received sample data D _{SPL —} i in the storage unit 12.

Storage means 12 stores the sampled data _{D SPL} _i. Further, the storage unit 12 associates the communication system, the frequency band, the communication method, the modulation method, the system bandwidth, the channel bandwidth, and the allowable SINR (Signal to Interference Plus Noise Ratio) with each other. The database DB1 is stored in advance.

The communication estimating unit 13 reads the sample data D _{SPL —} i stored in the storage unit 12 and, based on the read sample data D _{SPL —} i, a communication method of the primary user and the secondary user according to a method described later. Estimate the modulation scheme.

FIG. 3 is a diagram illustrating a relationship between frequency and power. Referring to FIG. 3, each of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7 performs a frequency scan with a bandwidth Wd having a start frequency f _START and an end frequency f _END, and The relationship between the frequency f at the width Wd and the received power RSSI is recorded. Each of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 communicates with the primary user and the secondary user based on the relationship between the frequency f in the bandwidth Wd and the received power RSSI. Determine the shared frequency to be shared between. Then, each of the plurality of terminal devices 2, 6, a plurality of sensors 5 and a plurality of robots 7, the shared frequency that the determined frequency f _{Ri _j,} by receiving radio waves at a frequency f _{Ri _j,} source described above identification information _ID SRC _j, reception time _t Ri _j, detects the received power RSSI _i _j of the received signal _S Ri _j and receive signals _S Ri _j, generates reception information INFO _R _j.

Further, each of the plurality of terminal devices 2, 6, a plurality of sensors 5 and a plurality of robots 7, when transmitting signals in the frequency _f Ti _j is a shared frequency, the destination identification information _ID DES _j, transmission time _{t Ti} _J and the transmission signal S _{Ti —} j are detected to generate transmission information INFO _{T —} j.

Each of the plurality of terminal devices 2, 6, a plurality of sensors 5 and a plurality of robots 7 generates sample data _{D SPL} _i including the received information INFO _R _j and transmission information INFO _T _j, and the generated sample The data D _{SPL —} i is transmitted to the base station 3 (or the base station 4). Further, the base station 3 receives the sample data D _{SPL —} i from at least one of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7, and transmits the received sample data D _{SPL —} i to the wired cable 8. To the communication estimating apparatus 1 via Furthermore, base station 4, a plurality of terminal devices 2, 6, from at least one of the plurality of sensors 5 and a plurality of robots 7 receives sample data _{D SPL} _i, the base station 3 the sample data _{D SPL} _i that the received Then, the data is transmitted to the communication estimation device 1 via the wired cable 8.

[Estimation of communication system or modulation system]
(Basic method)
A method of estimating a communication method or a modulation method using the basic method will be described. The communication systems to be estimated are time division duplex (TDD), frequency division duplex (FDD), cellular system, and television broadcasting. Television broadcasting is transmitted by an FPU (Field Pickup Unit, wireless relay transmission device). Therefore, in this specification, a television broadcast may be referred to as “FPU”. The modulation methods to be estimated include AM (Amplitude Modulation) modulation, ASK (Amplitude shift Keying) modulation, FM (Frequency Modulation) modulation, FSK (Frequency shift Keying) modulation, PSK (Phase shift Keying) modulation, CDMA. (Code Division Multiple Access) modulation and OFDM (Orthogonal Frequency Division Multiplexing) modulation.

FIG. 4 is a diagram for explaining a method of estimating a communication scheme and a modulation scheme. Referring to FIG. 4, the identification information of the terminal device (ID), and the J pieces of received information INFO _R _1~INFO _R _J and the J transmitted information INFO _T _1~INFO _T _J, associated with each other ing.

Communication estimating unit 13 reads out the I samples data _D SPL _{_1~} sample data _{D SPL} _I from the storage unit 12, based on its number I that the read sample data _D SPL _{_1~} sample data _{D SPL} _I, 4 as shown in, associating the J received information INFO _R _1~INFO _R _J and the J transmitted information INFO _T _1~INFO _T _J to each of the identification information of the I-number of the terminal device (ID).
(I) Estimation of TDD The communication estimating unit 13 executes the following items for the terminal device having the identification information ID ₁ .
(1-1) of the J source identification information _{ID SRC1 _1~ID} SRC1 _J, different from each other, and determines whether or not the transmission source identification information indicating primary user there two or more I do.
(1-2) of the J destination identification information _{ID DES1 _1~ID} DES1 _J, different from each other, and determines whether the identification information of the destination indicating the primary user there two or more I do.
(1-3) Two or more pieces of identification information of the transmission source when the determination result of item (1-1) is positive, and two pieces of identification information when the determination result of item (1-2) is positive It is determined whether or not the above information matches the identification information of the transmission destination.
(1-4) Item (1-3) of the determination result is source and destination are the two frequencies _f Rj _{_1} used to match each other when is _positive, whether _f Tj _1 coincides judge.

When all the determinations of the items (1-1) to (1-4) are affirmative, the communication estimating unit 13 determines that the communication system of the terminal device ID ₁ and the primary user of the two or more is TDD. presume.

In TDD, it is assumed that there are two or more users in the same channel, and two or more wave sources are also observed. On the other hand, when all the determinations of the items (1-1) to (1-4) are affirmative, it is determined that there are two or more primary users performing wireless communication with the terminal device ID _{1 on} the same frequency. Therefore, when all the determinations of the items (1-1) to (1-4) are affirmative, it is assumed that the communication method is TDD.

The communication estimating means 13, when the item (1-1) at least one determination of ~ item (1-4) is negative, doing terminal device ID _1, and the terminal device ID ₁ and a radio communication It is assumed that the communication method of the other party is not TDD.
(Ii) Estimation of OFDM, AM modulation, and ASK modulation The communication estimation unit 13 obtains a fluctuation width ΔRSSI ₁ of the received power based on the J received powers RSSI ₁ _ _{1 to} RSSI ₁ _J. When the fluctuation width ΔRSSI ₁ is equal to or more than twice the power of the own signal held in advance by the terminal device ID _i , the communication estimating unit 13 performs wireless communication with the terminal device ID ₁ and the terminal device ID ₁ It is estimated that the modulation method of the other party is one of OFDM modulation, AM modulation, and ASK modulation.

On the other hand, when the fluctuation width ΔRSSI ₁ is not more than twice the power of the own signal held in advance by the terminal device ID _i , the communication estimating unit 13 performs wireless communication with the terminal device ID ₁ and the terminal device ID ₁ It is estimated that the modulation method of the other party is neither OFDM modulation, AM modulation, nor ASK modulation.

Communication estimating means 13, the fluctuation range DerutaRSSI ₁ is, when the terminal device ID _i is determined to be more than twice the power of the No. confidence held in advance, the received signal _S R1 _{_1~S} R1 _J time response S It generates _{R1 _1 (t) ~S R1 _J} (t), calculates an autocorrelation on the basis of the generated time response _{S R1 _1 (t) ~S R1} _J (t). Then, when the autocorrelation consists of two peaks that appear periodically, the communication estimating means 13 estimates that the terminal device ID ₁ and the modulation method of the other party performing wireless communication with the terminal device ID ₁ are OFDM modulation. When the autocorrelation is not two peaks that appear periodically, the terminal apparatus ID ₁ and the modulation scheme of the other party performing wireless communication with the terminal apparatus ID ₁ are estimated to be AM modulation or ASK modulation.

FIG. 5 is a conceptual diagram of the autocorrelation. Referring to FIG. 5, when the modulation scheme is OFDM modulation, the autocorrelation has two peaks appearing at period T1. This is because OFDM includes a cyclic extension (guard period), so that a periodicity appears in the correlation value. Therefore, as shown in FIG. 5, when the autocorrelation consists of two peaks that appear periodically, the modulation scheme is estimated to be OFDM modulation.
(Iii) CDMA, FM modulation, FSK modulation of estimating communication estimator 13, when the head of the received power RSSI _{1_} 1 frequency _f R1 _1 sample data is shift frequency, the terminal device ID ₁ and the terminal device ID ₁ It is estimated that the modulation scheme of the other party performing wireless communication is one of CDMA modulation, FM modulation, and FSK modulation.

On the other hand, the communication estimator 13, when the head of the received power RSSI _{1_} 1 frequency _f R1 _1 does not shift frequency, a modulation scheme of the other party that performs wireless communication and the terminal device ID ₁ and the terminal device ID ₁ CDMA modulation , FM modulation and FSK modulation.

Communication estimating unit 13, when the head of the received power RSSI _{1_} 1 frequency _f R1 _1 is determined that shift frequency, calculates an autocorrelation of the received signal _S R1 _{_1~S} R1 _J by the above-described method. Then, when the autocorrelation consists of one peak that appears periodically, the communication estimating means 13 estimates that the terminal device ID ₁ and the modulation method of the other party performing wireless communication with the terminal device ID ₁ are CDMA modulation. , the autocorrelation is when it is not one peak appearing periodically estimates the modulation scheme of the other party that performs wireless communication and the terminal device ID ₁ and the terminal device ID ₁ and a FM modulation or FSK modulation.

FIG. 6 is another conceptual diagram of the autocorrelation. Referring to FIG. 6, when the modulation scheme is CDMA modulation, one peak of the autocorrelation appears in cycle T2. This is because, in the case of CDMA modulation, while the same spreading code is used, correlation by the code appears. Therefore, as shown in FIG. 6, when the autocorrelation consists of one peak that appears periodically, the modulation scheme is estimated to be CDMA modulation.
(Iv) Estimation of CDMA and PSK modulation The communication estimating unit 13 determines whether the terminal device ID ₁ and the terminal device ID ₁ and the received power RSSI ₁ _ _{1 to} RSSI ₁ _J have little variation when the variation width ΔRSSI ₁ is equal to or less than the threshold value ΔRSSI_th. It is estimated that the modulation method of the other party performing wireless communication with the terminal device ID ₁ is CDMA modulation or PSK modulation.

On the other hand, when the variation width ΔRSSI ₁ is larger than the threshold value ΔRSSI_th, the communication estimating unit 13 sets the terminal device ID ₁ and the modulation method of the other party performing wireless communication with the terminal device ID ₁ to neither CDMA modulation nor PSK modulation. It is estimated.

When the communication estimation unit 13 determines that the fluctuation width ΔRSSI ₁ is equal to or smaller than the threshold value ΔRSSI_th, the communication estimation unit 13 further determines whether the autocorrelation consists of one peak that appears periodically. When the autocorrelation consists of one peak that appears periodically, the communication estimating means 13 estimates that the terminal device ID ₁ and the modulation method of the other party performing wireless communication with the terminal device ID ₁ are CDMA modulation. Then, when the autocorrelation is not one peak that appears periodically, the terminal device ID ₁ and the modulation method of the other party performing wireless communication with the terminal device ID ₁ are estimated to be PSK modulation.
(V) Estimation of Cellular System or Television Broadcasting The communication estimating means 13 determines that the estimation results in (i) to (iv) described above are TDD, AM modulation, ASK modulation, FM modulation, FSK modulation, PSK modulation, CDMA modulation and If none of the OFDM modulation, and estimates the communication system of the other party that performs wireless communication and the terminal device ID ₁ and the terminal device ID ₁ and a cellular or television broadcasting.

The communication estimating means 13, by the methods described above (i) ~ (v), the terminal device _ID 2 _{~ID I,} and the terminal device _ID 2 _{~ID I} communication system or modulation of the other party that performs wireless communication Estimate the method.

(Table method)
A method of estimating a communication scheme or a modulation scheme using a table will be described. In the table system, the communication estimating unit 13 estimates the communication system or the modulation system with reference to the database DB1.

  FIG. 7 is a schematic diagram of the database DB1. Referring to FIG. 7, database DB1 includes a communication system, a frequency band, a communication method, a modulation method, a system bandwidth, a channel bandwidth, and an allowable SINR. The communication system, the frequency band, the communication method, the modulation method, the system bandwidth, the channel bandwidth, and the allowable SINR are associated with each other.

  The communication system includes, for example, a wireless system A, a wireless system B, a wireless system C, a wireless system D, a wireless system E, a wireless system F, and a wireless system G. The wireless systems A to G are, for example, FPU, amateur radio, disaster prevention radio, and the like.

  The 700 MHz frequency band, the FDD communication system (duplex system), the CDMA modulation system, the 10 MHz system bandwidth, the 20 kHz channel bandwidth, and the 10 dB allowable SINR are associated with the wireless system A.

  The 1.2 GHz frequency band, TDD communication system (duplex system), OFDM modulation system, 20 MHz system bandwidth, 50 kHz channel bandwidth, and 12 dB allowable SINR are associated with the wireless system B.

  The 200 MHz frequency band, TDD communication system (duplex system), ASK modulation system, 5 MHz system bandwidth, 100 kHz channel bandwidth, and 9 dB allowable SINR are associated with the radio system C.

  The 1.7 GHz frequency band, FDD communication system (duplex system), AM modulation system, 1 MHz system bandwidth, 10 kHz channel bandwidth, and 0 dB allowable SINR are associated with the radio system D.

  The 2.3 GHz frequency band, the FDD communication system (duplex system), the FM modulation system, the 500 kHz system bandwidth, the 15 kHz channel bandwidth, and the allowable SINR of 15 dB are associated with the radio system E.

  The 3.3 GHz frequency band, TDD communication system (duplex system), FSK modulation system, 2 MHz system bandwidth, 5 kHz channel bandwidth, and 40 dB allowable SINR are associated with the radio system F.

  The 800 MHz frequency band, TDD communication system (duplex system), PSK modulation system, 10 MHz system bandwidth, 10 kHz channel bandwidth, and 20 dB allowable SINR are associated with the wireless system G.

The communication estimation unit 18 detects a frequency band and a system bandwidth based on the sample data D _{SPL —} i. Each sampled data _{D SPL} _i Since consist J number of receiving information INFO _R _1~INFO _R _J, based on the J received information INFO _R _1~INFO _R of the J _J frequency _f Ri _{_1~f} Ri _J Frequency band and system bandwidth.

When detecting the frequency band and the system bandwidth, the communication estimating unit 13 estimates the communication system or the modulation system by detecting the communication system or the modulation system corresponding to the detected frequency band and the system bandwidth. For example, when the communication estimating unit 13 detects the 1.2 GHz frequency band and the 20 MHz system bandwidth based on the sample data D _{SPL —} i, the communication estimation unit 13 corresponds to the 1.2 GHz frequency band and the TDD corresponding to the 20 MHz system bandwidth. By detecting OFDM and OFDM, it is estimated that the communication scheme is TDD and the modulation scheme is OFDM. When the other frequency band and the system bandwidth are detected, the communication estimating means 13 estimates the communication method or the modulation method in the same manner.

  In the embodiment of the present invention, the above-described method for estimating the communication method or the modulation method using the basic method may be combined with the method for estimating the communication method or the modulation method using the table method. In this case, the method of estimating the communication method or the modulation method by the basic method may be performed after the method of estimating the communication method or the modulation method by the table method, and the method of estimating the communication method or the modulation method by the basic method may be performed. A method of estimating the communication method or the modulation method using the table method may be executed later.

  FIG. 8 is a flowchart for explaining the operation of communication estimation device 1 shown in FIG. Referring to FIG. 8, when the operation of communication estimation device 1 is started, receiving means 11 transmits a plurality of terminal devices (a plurality of terminal devices 2 and 6, a plurality of sensors 5 and a plurality of robots 7) to a plurality of terminal devices. It receives the sample data DSPL_i and stores the received plurality of sample data DSPL_i in the storage means 12. That is, the communication estimation device 1 collects the sample data DSPL_i (Step S1).

Then, the communication estimating unit 13 reads the sample data D _{SPL —} i stored in the storage unit 12, and detects a power fluctuation of the received power and a frequency shift of the head power based on the read sample data D _{SPL —} i ( Step S2).

  Then, the communication estimating unit 13 detects the fluctuation width of the power fluctuation (Step S3), and calculates the autocorrelation of the received signal (Step S4).

  Thereafter, the communication estimation unit 13 determines whether or not there are a plurality of wave sources (step S5).

  When it is determined in step S5 that there are a plurality of wave sources, the communication estimation unit 13 estimates that the communication method is TDD (step S6).

On the other hand, when it is determined in step S5 that there are not a plurality of wave sources, or after step S6, the communication estimation unit 13 determines that the fluctuation range of the power fluctuation is twice or more the power of the own signal in the terminal device ID _i . It is determined whether or not (step S7).

When it is determined in step S7 that the fluctuation width of the power fluctuation is equal to or more than twice the power of the own signal in the terminal device ID _i , the communication estimation unit 13 determines whether the modulation method is the OFDM modulation, the AM modulation, or the ASK modulation. It is estimated that there is (step S8).

On the other hand, when it is determined in step S7 that the fluctuation width of the power fluctuation is not more than twice the power of the own signal in the terminal device ID _i , or after step S8, the communication estimating unit 13 determines that the head power is the frequency deviation. It is determined whether or not to move (step S9).

  When it is determined in step S9 that the head power is shifted in frequency, the communication estimating unit 13 estimates that the modulation method is CDMA modulation, FM modulation, or FSK modulation (step S10).

  On the other hand, when it is determined in step S9 that the head power does not shift in frequency, or after step S10, the communication estimating unit 13 determines whether or not the fluctuation range of the power fluctuation is equal to or smaller than the threshold (step S11). ).

  When it is determined in step S11 that the fluctuation range of the power fluctuation is equal to or smaller than the threshold, the communication estimation unit 13 estimates that the modulation scheme is CDMA modulation or PSK modulation (step S12).

  On the other hand, when it is determined in step S11 that the fluctuation range of the power fluctuation is not equal to or smaller than the threshold, the communication estimation unit 13 estimates that the communication system is the cellular system or the television broadcast (step S13).

  Then, after step S12 or step S13, a series of operations ends.

FIG. 9 is a flowchart for explaining the detailed operation of step S8 in FIG. Referring to FIG. 9, when it is determined in step S7 of FIG. 8 that the fluctuation width of the power fluctuation is equal to or more than twice the power of the own signal in terminal device ID _i , communication estimating means 13 determines that the autocorrelation is It is determined whether two peaks appear periodically (step S81).

  When it is determined in step S81 that the autocorrelation consists of two peaks that appear periodically, the communication estimation unit 13 estimates that the modulation method is OFDM modulation (step S82).

  On the other hand, when it is determined in step S81 that the autocorrelation does not consist of two peaks that appear periodically, the communication estimating unit 13 estimates that the modulation method is AM modulation or ASK modulation (step S83). Then, after step S82 or step S83, a series of operations proceeds to step S9 in FIG.

  FIG. 10 is a flowchart for explaining the detailed operation of step S10 in FIG. Referring to FIG. 10, when it is determined in step S9 of FIG. 8 that the head power is shifted in frequency, communication estimating means 13 determines whether or not the autocorrelation consists of one peak that periodically appears. (Step S101).

  When it is determined in step S101 that the autocorrelation consists of one peak that appears periodically, the communication estimation unit 13 estimates that the modulation scheme is CDMA modulation (step S102).

  On the other hand, when it is determined in step S101 that the autocorrelation does not consist of one peak that appears periodically, the communication estimation unit 13 estimates that the modulation method is FM modulation or FSK modulation (step S103). Then, after step S102 or step S103, a series of operations proceeds to step S11 in FIG.

  FIG. 11 is a flowchart for explaining the detailed operation of step S12 in FIG. Referring to FIG. 11, when it is determined in step S11 in FIG. 8 that the fluctuation range of the power fluctuation is equal to or smaller than the threshold value, communication estimating means 13 determines whether or not the autocorrelation consists of one peak that periodically appears. Is determined (step S121).

  When it is determined in step S121 that the autocorrelation consists of one peak that periodically appears, the communication estimation unit 13 estimates that the modulation scheme is CDMA modulation (step S122).

  On the other hand, when it is determined in step S121 that the autocorrelation does not consist of one peak that appears periodically, the communication estimation unit 13 estimates that the modulation scheme is PSK modulation (step S123). After step S122 or step S123, a series of operations proceeds to “end” in FIG.

  FIG. 12 is a flowchart for explaining another operation of the communication estimation device 1 shown in FIG. In FIG. 12, the estimation result of the communication method or the modulation method is represented as “EST1” or “EST2”.

  Referring to FIG. 12, when the operation of communication estimation device 1 is started, communication estimation means 13 sequentially executes steps S1 to S13 in FIG. 8 described above (step S21). Then, the communication estimating unit 13 holds the estimated communication method or modulation method as the estimation result EST1 (step S22).

After that, the communication estimating unit 13 reads the sample data D _{SPL —} i from the storage unit 12A, and detects a frequency band and a system bandwidth based on the read sample data D _{SPL —} i (step S23).

  Subsequently, the communication estimating unit 13 reads the database DB1 from the storage unit 12A, detects a communication system or a modulation system corresponding to the detected frequency band and system bandwidth with reference to the read database DB1, and The communication method or the modulation method thus obtained is set as the estimation result EST2 (step S24).

  Then, the communication estimation unit 13 determines whether the estimation result EST1 matches the estimation result EST2 (step S25).

  When it is determined in step S25 that the estimation result EST1 does not match the estimation result EST2, a series of operations proceeds to step S21. Thereafter, in step S25, steps S21 to S25 are repeatedly executed until it is determined that the estimation result EST1 matches the estimation result EST2.

  Then, when it is determined in step S25 that the estimation result EST1 matches the estimation result EST2, the communication estimation unit 13 sets the matching estimation result as a final estimation result (step S26). Thus, a series of operations ends.

  In the flowchart shown in FIG. 12, steps S23 to S24 may be executed instead of step S21, and step S21 may be executed instead of steps S23 to S24. In this case, the estimation result in step S24 becomes the estimation result EST1, and the estimation result in step S21 becomes the estimation result EST2.

[Application example]
(I) Estimation of Wave Source Position Estimation of the wave source position will be described as an application example of the estimation result of the communication method or the modulation method described above.

  FIG. 13 is a schematic diagram of a communication estimation device 1A having a function of estimating a wave source position. Referring to FIG. 13, communication estimation apparatus 1A is obtained by adding estimation means 14 to communication estimation apparatus 1 shown in FIG. 2, and is otherwise the same as communication estimation apparatus 1.

In the communication estimation device 1A, when the estimation result of the communication method is TDD, the communication estimation means 13 generates a signal S _TDD indicating that the estimation result of the communication method or the modulation method is TDD, and sends the signal _STDD to the estimation means 14. output, communication when mode or modulation scheme estimation result is AM modulation or ASK modulation, the communication system or modulation method of the estimation result AM modulation or ASK generates a signal S _a indicating the modulation estimator 14 output to, when the estimated result of the communication system or modulation method is an FM modulation or FSK modulation, the communication system or modulation method of the estimation result FM modulation or FSK generated by estimator signal S _F indicating a modulation 14 is output.

When the estimation result of the communication method or the modulation method is OFDM modulation, the communication estimation means 13 generates a signal S _OF indicating that the estimation result of the communication method or the modulation method is OFDM modulation, and sends the signal S _OF to the estimation means 14. outputs, when the estimated result of the communication system or modulation method is a CDMA modulator, the estimated result of the communication system or modulation method to output to the estimation means 14 generates a signal S _CD indicating that the CDMA modulation, communication system or when the estimation result of the modulation scheme is PSK modulation, estimation of the estimation result is output to the estimation means 14 generates a signal S _P indicating the PSK modulation, the communication system or modulation method of the communication system or modulation method When the result is a cellular system or a television method, the estimation result of the communication method or the modulation method is a cellular system or the television method Outputs DOO to estimation means 14 generates a signal S _TC indicating a.
(TDD)
The estimating means 14 receives the signal _STDD from the communication estimating means 13 when the estimation result of the communication method or the modulation method is TDD. Then, the estimation means 14 reads the sampled data _{D SPL} _i from the storage unit 12, the signal _{S TDD} in accordance with the received power RSSI _i associated with the identification information _{ID SRC} _j indicating that the transmission source is a base station _J and position information [x _i , y _i ] are detected from the sample data D _{SPL —} i. In this case, in the TDD, since a plurality of wave sources (= a plurality of base stations) is present, estimating means 14, a plurality of received power RSSI _i _j and a plurality of position information _{[x i, y} i] sample data D detected from the _SPL _i.

Then, the estimation unit 14 calculates the center of gravity _{[x G, y} G] by substituting plurality of received power RSSI _i _j and a plurality of position information detection _{[x i, y} i] to Equation (1), The calculated center of gravity [x _G , y _G ] is estimated as the wave source position (the position of the base station).

In Expression (1), w _i represents the weight of the i-th terminal device (any of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7), and the reception power of the i-th terminal device. RSSI _i .

Then, the estimating means 14 estimates the center of gravity (x _G , y _G ) calculated by the equation (1) as the wave source position. That is, the estimation unit 14 estimates the center of gravity [x _G , y _G ] of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 weighted by the received power RSSI _i as the wave source position.
(CDMA)
Estimating means 14, when the estimated result of the communication system or modulation method is a CDMA modulator, it receives the signal _{S CD} from the communication estimating means 13, in response to the received signal _{S CD,} the source of the identification information _{ID SRC} _j Referring to forward link (= downlink) a plurality of received power RSSI _i _j and a plurality of position information _{[x i, y} i] associated with the transmission source identification information _{ID SRC} _j of the sample data _{D SPL} _i To detect.

Then, the estimation unit 14 calculates the center of gravity _{[x G, y} G] by substituting plurality of received power RSSI _i _j and a plurality of position information detection _{[x i, y} i] to Equation (1), The calculated center of gravity [x _G , y _G ] is estimated as the wave source position (the position of the transmission source of the forward link). The estimating unit 14 does not use the reverse link (= uplink) received power RSSI _{i —} j in estimating the wave source position.
(FM modulation)
Estimating means 14, when the estimated result of the communication system or modulation scheme is FM modulation, receiving the signal S _F from the communication estimating means 13, in response to the received signal S _F, a plurality of receiving that frequency shift detecting signal _S a plurality of received power RSSI corresponding to Ri _j _i _j and a plurality of position information _{[x i, y} i] from the sample data _{D SPL} _i. The received power RSSI _{i —} j corresponding to the frequency-shifted received signal S _{Ri —} j is the received power detected using a filter having a bandwidth that includes the range of the frequency shift due to the modulated signal.

Then, the estimation unit 14 calculates the center of gravity _{[x G, y} G] by substituting plurality of received power RSSI _i _j and a plurality of position information detection _{[x i, y} i] to Equation (1), The calculated center of gravity [x _G , y _G ] is estimated as a wave source position.

Incidentally, the estimated result of the communication system or modulation method TDD, when other than CDMA and FM modulation, estimation means 14, a plurality of received power RSSI _i _j from the sample data _{D SPL} _i without distinction the received power RSSI _i detecting a plurality of position information corresponding to a plurality of received power RSSI _i _j that the detected _{[x i, y} i] detected. Then, the estimation unit 14 calculates the center of gravity _{[x G, y} G] by substituting plurality of received power RSSI _i _j and a plurality of position information detection _{[x i, y} i] to Equation (1), The calculated center of gravity [x _G , y _G ] is estimated as the wave source position (the position of the base station).

  The estimating means 14 estimates the wave source position by the above-described method, and when there is an error in the estimated wave source position, adds a virtual terminal device, and replaces the terminal device 2 whose reliability REL is equal to or less than the threshold value Rth with the wave source position. The wave source position is estimated by deleting from the actual terminal device used for estimation.

When adding a virtual terminal device, the estimating means 14 may add the virtual terminal device to an arbitrary position, or may arrange the virtual terminal device on a contour line of the received power. Since the plurality of real terminal devices and the plurality of virtual terminal devices when estimating the wave source position are arranged on the xy plane, even if the virtual terminal device is arranged at an arbitrary position or on a contour line, the estimating means 14 Can detect the position of the virtual terminal device. Furthermore, estimation means 14, if you add a virtual terminal device to any position, calculates the distance L _c-V with contour lines of the received power and the virtual terminal device, the distance L _c-V and contours on that the operation on the basis of the power value PW, calculates the reception power in the terminal agent by _{PW-10L c-v} /3.16 or _{PW + 10L} c-v /3.16. Here, 3.16 is the distance at which the power value changes by 10 dB when the free space propagation model of the radio wave is used. Note that, in the embodiment of the present invention, when a radio wave propagation model other than the free space propagation model of the radio wave is used, a distance when the power value changes by a fixed value is obtained, and the obtained distance is used as a virtual value. The reception power in the terminal device may be calculated. Further, the distance _Lc-V is calculated as a distance of a perpendicular line drawn from the position of the virtual terminal device to a contour line.

  The terminal devices (the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) that are affected by fading are factors that reduce the estimation accuracy of the wave source position. Therefore, in the embodiment of the present invention, the reliability REL of the received power is calculated, and the calculated reliability REL is equal to or less than the threshold value Rth (the plurality of terminal devices 2, 6, the plurality of sensors 5). And the plurality of robots 7) are deleted from the terminal devices (the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) used for estimating the wave source position.

When the terminal devices (the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) are arranged on the contour line of the received power, the estimating unit 14 determines the power value PW (electric power) on the contour line of the received power. The difference ΔP _i between the received power P _{i of} each of the terminal devices (the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) is calculated. When the terminal devices (the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) are not arranged on the contour line of the received power, the estimating unit 14 determines the power value PW on the contour line of the received power. a determined power value by using the free space propagation model of radio waves based on (power value PW1, either _{PW2) (PW-10L c-} v /3.16 or _{PW + 10L c-v /3.16)} , The difference ΔP _i from the received power P _{i of} each terminal device (the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) is calculated. Then, the estimating means 14 determines whether or not the reliability REL _i is equal to or less than the threshold value Rth by determining whether or not the difference ΔP _i is greater than the threshold value Pth. More specifically, the estimation means 14, when the difference [Delta] P _i is greater than the threshold value DerutaPth, determines that the reliability REL _i is less than or equal to the threshold Rth, the difference [Delta] P _i is less than or equal to the threshold DerutaPth sometimes, it is determined that the reliability REL _i is greater than the threshold value Rth.

The threshold value Pth is, for example, 10 dB. _{Moreover, PW-10L c-v /3.16[dBm} ] is present from contour CTR_SYN of the received power (contour lines of the power value PW) at a distance _{L c-v} spaced a direction away from the only source locations VT This is the received power P _jv of the device 2vj. _{Moreover, PW + 10L c-v /3.16[dBm} ] is the received power P of the terminal agent 2vj present at a position closer from contour CTR_SYN (contour lines of the power value PW1 or PW2) at a distance _{L c-v} by the wave source _jv .

As described above, in the embodiment of the present invention, the estimation unit 14 determines the position information (x _i , y _i ) of the plurality of terminal devices (the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7). ) And an error in the wave source position estimated based on the received power P _i , the addition of the virtual terminal device 2vj and the deletion of the terminal device 2 whose reliability REL of the received power is equal to or less than the threshold value Rth are performed. location information of the terminal device 2 and the terminal agent _{2vj (x i, y i)} , (x jv, y jv) and the received power _{P i,} the center of gravity which is calculated by equation (1) based on the _{P jv (x} G, y _The estimation process of estimating _G ) as the wave source position is repeatedly performed until the convergence condition is satisfied.

  Then, the estimating unit 14 repeatedly estimates the wave source position until the convergence condition is satisfied.

  The convergence condition is as follows.

(Cd1) is determined as the average position of all of the terminal devices including a terminal device 2 and the terminal agent 2vj _{(x A, y} A) is time is below the threshold value Δx _A, Δy _A, it converged. In this case, _{x A} is equal to or less than the threshold value [Delta] x _A, and, if _{y A} is less than or equal to a threshold [Delta] y _A, judged to have converged. The threshold Δx _A is, for example, 10 m, and the threshold Δy _A is, for example, 10 m.

  (Cd2) It is determined that convergence has occurred when the number of determinations reaches a certain number of times, such as 5 to 10 times.

  (Cd3) In the second and subsequent determinations, there is an error ΔG between the wave source position estimated in the k−1 (k is an integer of 2 or more) determination and the wave source position estimated in the k-th determination. It is determined that the convergence has occurred when the difference is equal to or smaller than the threshold value Gth.

If the convergence condition (Cd1) is used, the average position _(x A, _{y A)} is calculated by the following equation.

In Equation (2), SN _r represents a terminal device (a plurality of terminal devices 2 and 6, a plurality of sensors 5 and a plurality of robots 7), and SN _d represents a virtual terminal device 2vj.

FIG. 14 is a flowchart for explaining the operation of estimating the wave source position. Referring to FIG. 14, when the operation of estimating the wave source position is started, estimating means 14 of communication estimating apparatus 1A estimates communication system or modulation system estimation results EST (signals) of the primary user and the secondary user. _STDD , the signal S _A , the signal S _F , the signal S _OF , the signal S _CD , the signal _SP, and the signal S _TC ) are received from the communication estimation unit 13 (step S31).

  Then, the estimating unit 14 determines whether the estimation result EST is one of TDD, CDMA modulation, and FM modulation (step S32).

In step S32, when the estimated result EST is determined TDD, as either CDMA modulation and FM modulation, estimation means 14 based on the estimation result EST, from the sample data _{D SPL} _i plurality of terminal group Among the plurality of received powers, a plurality of received powers whose errors are suppressed are detected, and a plurality of pieces of position information corresponding to the detected plurality of received powers are detected (step S33).

On the other hand, when it is determined in step S32 that the estimation result EST is not any of TDD, CDMA modulation, and FM modulation, the estimating unit 14 determines a plurality of real terminals from the sample data D _{SPL —} i without distinguishing the reception power. A plurality of pieces of received power and a plurality of pieces of position information of the device are detected (step S34).

After the step S33 or step S34, estimation means 14, a plurality of positional information _{(x 1, y 1) ~} (x N, y N) a and a plurality of received power RSSI ₁ ~RSSI _N in equation (1) assignment to the center of gravity _(x G, _{y G)} calculates the estimates the calculated center of gravity _(x G, _{y G)} as wave source position (step S35).

Then, the estimating unit 14 substitutes the plurality of pieces of position information (x ₁ , y ₁ ) to (x _N , y _N ) and the total number N of the terminal devices 2 into Expression (2), and averages the positions (x _A , y _A ) is calculated (step S36).

Then, the estimation unit 14, _{x A} <Δx _A and determines whether or not _{y A <Δy A} (step S37).

In step S37, _{x A} <Δx _A and, when it is determined not _{y A <Δy A,} estimating means 14, add the J terminal agent 2v1~2vJ based on prestored power distribution estimation results (Step S38).

  Subsequently, the estimating unit 14 deletes the terminal devices (the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) having low received power reliability REL from the terminal devices used for estimating the wave source position ( Step S39).

Thereafter, the series of operations proceeds to step S35, in step S37, _{x A} <Δx _A and, until it is determined that the _{y A <Δy A,} step S35~ step S39 is repeatedly executed.

Then, in step S37, _{x A} <Δx _A and, when it is determined that the _{y A <Δy A,} the operation is completed to estimate the wave source position.

In the flowchart shown in FIG. 14, when the process proceeds from step S33 to step S35, in step S35, the estimating unit 14 estimates the wave source position [x _G , y _G ] using a plurality of reception powers with suppressed errors. . Therefore, the wave source position [x _G , y _G ] can be accurately estimated.

Even when the wave source position is estimated using a plurality of received powers with suppressed errors, if the distribution of the actual terminal devices is biased, there is an error in the estimated wave source position [x _G , y _G ].

Thus, after step S35, S36 is executed, in step S37, the estimated source locations _{[x G, y} G] When it is determined that there is an error in the _{(x A} <Δx _A and,, _{y A} <[Delta] y _If it is determined that it is not _A ), after the above-described steps S38 and S39 are sequentially executed, the process proceeds to step S35.

  Then, in step S35, the estimating unit 14 uses the plurality of pieces of position information of the plurality of real terminal apparatuses and the plurality of reception powers in which the error is suppressed, the plurality of pieces of position information of the virtual terminal apparatus, and the plurality of reception powers to generate a wave source. Estimate the position. Therefore, the wave source position can be accurately estimated.

When the process proceeds from step S34 to step S35, the estimation unit 14 estimates the wave source position using the plurality of pieces of received power and the plurality of pieces of position information detected from the sample data D _{SPL —} i without distinguishing the received power ( Step S35).

FIG. 15 is a flowchart for explaining the detailed operation of step S33 in FIG. Referring to FIG. 15, when it is determined in step S32 of FIG. 14 that estimation result EST is one of TDD, CDMA modulation, and FM modulation, estimation unit 14 outputs signal _STDD from communication estimation unit 13. It is determined whether or not the estimation result EST is TDD by determining whether or not it has been received (step S331). In this case, the estimation means 14, when the communication estimating means 13 receives a signal _{S TDD,} estimation results EST is determined to be TDD, when the communication estimator 13 does not receive a signal _{S TDD,} estimation result EST Is not TDD.

When it is determined in step S331 that the estimation result EST is TDD, the estimation unit 14 determines a plurality of reception powers of a plurality of radio waves transmitted from a communication device that controls and / or manages another communication device, and A plurality of pieces of position information corresponding to a plurality of received powers are detected from the sample data D _{SPL —} i (step S332).

On the other hand, if in step S331, when the estimation result EST is determined not TDD, estimating means 14 is an estimation result EST is CDMA modulation by determining whether it has received a signal _{S CD} from the communication estimator 13 It is determined whether or not it is (step S333). In this case, the estimation means 14, when the communication estimating means 13 receives a signal _{S CD,} estimation results EST is determined to be CDMA modulation, when the communication estimator 13 does not receive a signal _{S CD,} estimation result It is determined that EST is not CDMA.

When it is determined in step S333 that the estimation result EST is CDMA modulation, the estimating unit 14 determines a plurality of reception powers of a plurality of radio waves on the forward link and a plurality of pieces of position information corresponding to the plurality of reception powers. It is detected from the sample data D _{SPL —} i (step S334).

On the other hand, when it is determined in step S333 that the estimation result EST is not CDMA modulation, the estimating unit 14 calculates a plurality of reception powers of a plurality of radio waves detected by a filter having a bandwidth including a frequency shift due to the modulation signal. , And a plurality of pieces of position information corresponding to the plurality of received powers are detected from the sample data D _{SPL —} i (step S335).

  Then, after any of steps S332, S334, and S335, the process proceeds to step S35 in FIG.

  When it is determined in step S333 that the estimation result EST is not CDMA modulation, it is not determined whether or not the estimation result EST is FM modulation in the flowchart of FIG. It is assumed that EST is determined to be one of TDD, CDMA modulation, and FM modulation. In step S331, it is determined that estimation result EST is not TDD, and in step S333, estimation result EST is not CDMA. This is because it is clear that the estimation result EST is FM modulation.

  FIG. 16 is a flowchart for explaining another operation of estimating the wave source position. The flowchart shown in FIG. 16 is the same as the flowchart shown in FIG. 14 except that step S37 of the flowchart shown in FIG. 14 is replaced with step S37A, and steps S33A and S33B are added.

  Referring to FIG. 16, when the operation of estimating the wave source position is started, steps S311 to S34 described above are sequentially performed. Then, after step S33 or step S34, the estimation unit 14 sets k = 1 (step S33A). Then, after the above-described step S35 is executed, the estimating unit 14 determines whether or not k = K (step S37A). Here, k indicates the number of times of estimation of the wave source position, and K indicates the maximum number of times of estimation of the wave source position.

  When it is determined in step S37A that k is not K, the estimating unit 14 sets k = k + 1 (step S33B). Then, steps S38 and S39 described above are sequentially performed. After step S39, a series of operations proceeds to step S35. Thereafter, in step S37A, steps S35, S37A, S33B, S38, and S39 are repeatedly executed until it is determined that k = K. Then, in step S37A, when it is determined that k = K, the operation of estimating the wave source position ends.

  FIG. 17 is a flowchart for explaining still another operation for estimating the wave source position. The flowchart shown in FIG. 17 is the same as the flowchart shown in FIG. 16 except that step S37A of the flowchart shown in FIG. 16 is changed to steps S41 to S43.

  Referring to FIG. 17, when the operation of estimating the wave source position is started, steps S31 to S34, S33A, and S35 described above are sequentially performed. Then, after step S35, the estimating unit 14 determines whether or not k is 2 or more (step S41).

  When it is determined in step S41 that k is 2 or more, the estimating unit 14 calculates an error ΔG between the wave source position estimated at the (k−1) -th determination and the wave source position estimated at the k-th determination. (Step S42).

  Then, the estimating unit 14 determines whether the error ΔG is equal to or smaller than the threshold Gth (Step S43).

When it is determined in step S43 that the error ΔG is not equal to or smaller than the threshold value Gth, or when it is determined in step S41 that k is not equal to or larger than 2, the above-described steps S33B, S38, and S39 are sequentially performed. Then, after step S39, a series of operations proceeds to step S35. Thereafter, in step S43, steps S35, S41 to S43, S33B, S38, and S39 are repeatedly executed until it is determined that the error ΔG is equal to or smaller than the threshold value Gth. When it is determined in step S43 that the error ΔG is equal to or smaller than the threshold value Gth, the operation of estimating the wave source position ends.
(Ii) Estimation of communication range Estimation of the communication range will be described as an application example of the estimation result of the communication method or the modulation method described above.

  FIG. 18 is a schematic diagram of a communication estimation device having a function of estimating a communication range. Referring to FIG. 18, communication estimating apparatus 1B is the same as communication estimating apparatus 1A except that estimating means 14 of communication estimating apparatus 1A shown in FIG. 13 is replaced with estimating means 14A.

The estimation unit 14A estimates the wave source position [x _G , y _G ] by the same method as the estimation method of the wave source position by the estimation unit 14 of the communication estimation device 1A. Then, the estimating unit 14A estimates the communication range of the primary user using the estimated wave source position [x _G , y _G ].

More specifically, the estimating unit 14A estimates, as the communication range of the primary user, the maximum radius at which the reception power of the radio wave transmitted from the primary user becomes equal to or less than a certain value (set value). In this case, the estimation unit 14A, among the plurality of received power RSSI _i included in the plurality of sample data _{D SPL} _i, detects the received power RSSI _i _low equal to or less than the set value, the received power RSSI _i _low that the detected The distance between the position of the terminal device (at least one of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) and the position of the primary user (= [x _G , y _G ]) Then, the maximum value of the calculated distance is estimated as the communication range of the primary user. The set value is set in consideration of an allowable interference power, an interference margin, and the like.
(TDD)
When the estimation result EST is TDD, the estimating unit 14A selects the radio wave from the master station (base station) from among the plurality of received power RSSI _i included in the plurality of sample data D _{SPL —} i stored in the storage unit 12. detecting a received power RSSI _i _M, among the received power RSSI _i _M that the detected, detects the received power RSSI _i _M_low to be below the set value. Then, the estimation unit 14A includes a position of a terminal device having received power RSSI _i _M_low (plurality of terminal devices 2, 6, at least one of the plurality of sensors 5 and a plurality of robots 7), the wave source position _{[x G} , Y _G ] is calculated, and the maximum value of the calculated distance is estimated as the communication range of the primary user.

Thus, when the estimation result EST of the communication method or the modulation method is TDD, the estimating unit 14A communicates with the primary user based on the received power RSSI _i _M of the radio wave transmitted from the master station (base station). Estimate the range. Note that the master station (base station) corresponds to a communication device that controls and / or manages another communication device.

  In the case of TDD, there are multiple sources. Further, in the power measurement by the spectrum analyzer, an error occurs in the power measurement because the phases of transmission and reception of the radio wave appear as the duty ratio of the power.

However, the estimated result of the communication system or modulation method when a TDD, estimates the communication range of the base station (= primary user of the communication range) by using the received power RSSI i _{_M} from the master station (base station) so it can be estimated communication range of the base station (= primary user of the communication range) by using the received power RSSI i _{_M} which suppresses errors. Therefore, the communication range of the base station (= the communication range of the primary user) can be accurately estimated.
(CDMA)
When the estimation result EST is CDMA modulation, the estimating unit 14A receives from the transmission source of the forward link out of the plurality of received power RSSI _i included in the plurality of sample data D _{SPL —} i stored in the storage unit 12. detecting a power RSSI _i _F, among the received power RSSI _i _F that the detected, detects the received power RSSI _i _F_low to be below the set value. Then, the estimating unit 14A calculates the position of the terminal device (at least one of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) having the received power RSSI _i _F_low, and the wave source position [x _G , Y _G ] is calculated, and the maximum value of the calculated distance is estimated as the communication range of the primary user. In this case, the estimating unit 14A does not use the received power RSSI _{i —} j of the reverse link (= uplink).

As described above, when the estimation result of the communication scheme or the modulation scheme is CDMA modulation, the estimating unit 14A does not use the received power RSSI _{i —} j of the reverse link (= uplink) and receives the signal from the transmission source of the forward link. estimating the communication range of the primary user based on the power RSSI _i _F.

In the case of CDMA modulation, since the transmission power of the forward link is constant power, the communication range of the primary user can be accurately estimated by using the received power RSSI _i _F in the forward link.
(FM modulation)
Estimating means 14A, when estimation result EST is FM-modulated, from among the plurality of received power RSSI _i included in the plurality of sample data _{D SPL} _i stored in the storage unit 12, the range of the frequency shift by the modulation signal detecting a received power RSSI _i _BW detected using a filter having a bandwidth including, among the received power RSSI _i _BW that the detected, detects the received power RSSI _i _BW_low to be below the set value. Then, the estimating unit 14A calculates the position of the terminal device (at least one of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) having the received power RSSI _i _BW_low, and the wave source position [x _G , Y _G ] is calculated, and the maximum value of the calculated distance is estimated as the communication range of the primary user.

As described above, when the estimation result of the communication method or the modulation method is the FM modulation, the estimation unit 14 detects the reception power RSSI _i _BW detected using the filter having the bandwidth including the range of the frequency shift due to the modulation signal. Is used to estimate the communication range of the primary user, so that the communication range of the primary user can be accurately estimated.

  When the filter for detecting the received power has a narrow bandwidth with respect to the frequency shift, the received power changes according to the modulation signal.

However, when detecting the received power RSSI i _{_BW} using a filter having a bandwidth including a range of frequency shift caused by the modulation signal, received power RSSI i _{_BW} does not change according to the modulation signal. Therefore, the communication range of the primary user can be accurately estimated.

Incidentally, when the estimated result of the communication system or modulation method TDD, other than CDMA and FM modulation, estimation means 14A, a plurality of received power RSSI _i in the sample data _{D SPL} _i without distinction the received power RSSI _i _J, a received power RSSI _i _j_low that is equal to or less than a set value is detected. Then, the estimation unit 14A includes a position of a terminal device having received power RSSI _i _j_low (plurality of terminal devices 2, 6, at least one of the plurality of sensors 5 and a plurality of robots 7), the wave source position _{[x G} , Y _G ] is calculated, and the maximum value of the calculated distance is estimated as the communication range of the primary user.

  Further, the estimating means 14A calculates the distance at which the reception power of the radio wave transmitted from the secondary user is set to a set value, and sets the range in which the position of the secondary user is the center and the calculated distance is the radius as the secondary. Estimate the communication range of the user.

  FIG. 19 is a flowchart for explaining the operation of estimating the communication range of the primary user and the secondary user.

Referring to FIG. 19, when the operation of estimating the communication range is started, the estimating unit 14A estimates the communication system of the primary user and the secondary user (signal S _TDD , signal S _A , signal S _A) . _F , any one of the signal S _OF , the signal S _CD , the signal _SP, and the signal S _TC ) is received from the communication estimation unit 13 (step S51).

  Then, the estimating unit 14A determines whether the estimation result EST is TDD (step S52).

When it is determined in step S52 that the estimation result EST is TDD, the estimating unit 14A transmits the received power RSSI _i included in the sample data D _{SPL —} i stored in the storage unit 12 from the master station. selecting a radio wave received power RSSI _i _M (step S53).

  On the other hand, when it is determined in step S52 that the estimation result EST is not TDD, the estimation unit 14A determines whether the estimation result EST is CDMA modulation (step S54).

When it is determined in step S54 that the estimation result EST is CDMA modulation, the estimating unit 14A determines whether or not the plurality of received powers RSSI _i included in the sample data D _{SPL —} i stored in the storage unit 12 are in the forward link. The received power RSSI _i _F is selected (step S55).

  On the other hand, when it is determined in step S54 that the estimation result EST is not CDMA modulation, the estimating unit 14A determines whether the estimation result EST is FM modulation (step S56).

When it is determined in step S56 that the estimation result EST is the FM modulation, the estimation unit 14A performs the frequency shift among the plurality of reception power RSSI _i included in the sample data D _{SPL —} i stored in the storage unit 12. The detected received power RSSI _i _BW is selected using a filter having a bandwidth that includes the range (step S57).

Then, in step S56, when it is determined that the estimation result EST is not FM modulation, or after any of step S53, step S55, and step S57, the estimating unit 14A determines a plurality of secondary usages by using equation (1). the center of gravity [x _{G, y G]} positions of the plurality of secondary users have been weighted by the received power at the user calculates the center of gravity [x _{G, y G]} of the calculated position and the position of the primary user It is estimated (step S58).

Thereafter, the estimating unit 14A estimates the communication range of the primary user based on the reception power of the radio wave transmitted from the primary user (step S59). More specifically, the estimating unit 14A estimates, as the communication range of the primary user, the maximum radius at which the received power of the radio wave transmitted from the primary user becomes equal to or less than the set value. In this case, the estimation unit 14A, among the plurality of received power RSSI _i included in the plurality of sample data _{D SPL} _i, detects the received power RSSI _i _low equal to or less than the set value, the received power RSSI _i _low that the detected The distance between the position of the terminal device (at least one of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) and the position of the primary user (= [x _G , y _G ]) Then, the maximum value of the calculated distance is estimated as the communication range of the primary user.

  After step S59, the estimating unit 14A obtains a distance at which the reception power of the radio wave transmitted from the secondary user becomes a set value, and sets the range around the secondary user's position and the radius as the calculated distance. Is estimated as the communication range of the secondary user (step S60). Thus, the operation of estimating the communication range ends.

[Setting sharing conditions]
As an application example of the above-described estimation result of the communication method or the modulation method, setting of a sharing condition when a primary user and a secondary user share a frequency will be described.

  FIG. 20 is a schematic diagram of a communication estimation device having a function of setting a sharing condition. Referring to FIG. 20, communication estimating apparatus 1C is obtained by adding correction means 15, determining means 16, setting means 17 and transmitting means 18 to communication estimating apparatus 1B shown in FIG. Same as 1B.

In the communication estimating apparatus 1C, the communication estimating unit 13 calculates the estimation result EST (any one of the signal S _TDD , the signal S _A , the signal S _F , the signal S _OF , the signal S _CD , the signal _SP, and the signal S _TC ). Is output to the estimating means 14A and the correcting means 15. The storage unit 12 further stores a database DB2 described later, a primary user's corrected communication range, and a secondary user's corrected communication range.

  The correction unit 15 reads out the communication range of the primary user and the communication range of the secondary user from the storage unit 12. The correction unit 15 reads the database DB2 from the storage unit 12. Further, the correction unit 15 receives from the communication estimation unit 13 the estimation result EST of the communication method or modulation method of the primary user and the secondary user.

  Then, the correction unit 15 detects the allowable interference amount corresponding to the estimation result of the communication method or the modulation method of the primary user and the secondary user with reference to the database DB2, and based on the detected allowable interference amount. Then, the communication range of the primary user and the communication range of the secondary user are corrected by a method described later. Then, the correction unit 15 stores the corrected communication range of the primary user and the corrected communication range of the secondary user in the storage unit 12.

[Correction of communication range]
FIG. 21 is a conceptual diagram of another database. Referring to FIG. 21, database DB2 includes a primary user's communication method or modulation method, a secondary user's communication method or modulation method, and allowable interference amounts AAIF _pq , AAIF _qp (p = 1 to 7, q = 1 to 7).

Each of the allowable interference amounts AAIF _pq and AAIF _qp is associated with a combination of the communication method or modulation method of the primary user and the communication method or modulation method of the secondary user. For example, the allowable interference amount AAIF ₁₁ is a communication system or modulation method of the primary user TDD, a permissible amount of interference when the communication system or modulation method of the second user is a TDD, AAIF ₁₂ is This is the allowable interference amount when the communication method or modulation method of the primary user is AM modulation or ASK modulation, and the communication method or modulation method of the secondary user is TDD. The same applies to the other allowable interference amounts AAIF _{13 to} AAIF ₇₇ .

When p ≠ q, the allowable interference amount AAIF _pq is the same as the allowable interference amount AAIF _qp . That is, the allowable interference amounts AAIF _{11 to} AAIF ₇₇ are arranged in a matrix of 7 rows × 7 columns, so that the diagonal components AAIF ₁₁ , AAIF ₂₂ , AAIF ₃₃ , AAIF ₄₄ , AAIF ₅₅ , AAIF ₆₆ and AAIF ₇₇ are arranged. Off-diagonal components arranged symmetrically with respect to each other are the same as each other.

Each of the allowable interference amounts AAIF _{11 to} AAIF ₇₇ is composed of an allowable interference amount simulated using a combination of the communication method or modulation method of the primary user and the communication method or modulation method of the secondary user.

The correction unit 15 estimates the estimation result (signal S _TDD , signal S _A , signal S _F , signal S _OF , signal S _CD) of the communication scheme or modulation scheme of the primary user and the communication scheme or modulation scheme of the secondary user. And any one of the signals S _TC ) from the communication estimating means 13, referring to the database DB 2 read from the storage means 12 and referring to the allowable interference amount AAIF _pq (any of AAIF _{11 to} AAIF ₇₇ ) corresponding to the estimation result. Is detected.

Then, the correction unit 15 determines the detected allowable interference amount AAIF _pq (any one of AAIF _{11 to} AAIF ₇₇ ) as the power amount P _margin of the _margin .

  FIG. 22 is a diagram illustrating the relationship between the cumulative probability and the signal strength. In FIG. 22, the vertical axis represents the cumulative probability, and the horizontal axis represents the signal strength. Curve k1 shows the relationship between the cumulative probability and the signal strength in Rayleigh fading, and curve k2 shows the relationship between the cumulative probability and the signal strength in Nakagami Rice fading when the rice coefficient K is 40.

  Referring to FIG. 22, in Rayleigh fading and Nakagami Rice fading, the cumulative probability increases exponentially as the signal strength increases (see curves k1 and k2).

  A base station of a cellular system or a television broadcast is generally a fixed station, but a mobile station communicates while moving. Even if both the fixed station and the sensor node are in a fixed state, the surrounding communication environment is temporally changing, so that the sensor node is affected by fading while observing power. Further, in the mobile station, fading accompanying the movement is further added.

Therefore, when the estimation result of the communication system or the modulation system is a cellular system or a television broadcast, the correction unit 15 reads the relationship between the cumulative probability and the signal strength (curve k1 or k2 in FIG. 22) from the storage unit 12. Based on the relationship between the read cumulative probability and the signal strength (curve k1 or curve k2 in FIG. 22), for example, an event occurring at a probability of 90% is selected from an event occurring at a probability of 5%. . That is, in the Rayleigh fading, the correction unit 15 selects the signal strength P2 from the signal strength P1, and determines the selected signal strength P2 as the margin power amount _Pmargin . Further, in Nakagami Rice fading, the correction means 15 selects the signal strength P4 from the signal strength P3, and determines the selected signal strength P4 as the power amount P _margin of the _margin .

The selection of an event that occurs at a probability of 90% is merely an example, and the correction unit 15 may select an event that occurs at a probability other than 90%. It is sufficient to select an event that occurs with high probability. Therefore, when the estimation result of the communication system or the modulation system is a cellular system or a television broadcast, the correction unit 15 determines the reference probability based on the relationship between the cumulative probability and the signal strength (curve k1 or curve k2 in FIG. 22). A signal strength corresponding to an event occurring with a higher probability is detected, and the detected signal strength is determined as a power amount P _margin of the _margin .

  FIG. 23 is a diagram for explaining a method of correcting the communication range of the primary user. In FIG. 23, the vertical axis represents the power of the primary user, and the horizontal axis represents the distance from the primary user.

  Referring to FIG. 23, a curve k3 is a propagation characteristic of a radio wave obtained by estimation. A curve k3 is a propagation characteristic of a radio wave estimated using a radio wave propagation model such as a radio wave free space propagation model.

The distance R ₂ is the radius determined by the method described above, a communication range of the primary user estimated by the estimating means 14A.

When determining the power amount P _margin of the _margin by the above-described method, the correction unit 15 obtains the power P ₅ of the primary user corresponding to the distance R ₂ based on the curve k 3, and _{adds the margin} to the obtained power P ₅ . by adding the amount of power _{P margin} calculated power _{P 6} of the primary user, it obtains a distance _{R 1} which corresponds to the power _{P 6} of the determined primary user. That is, the correction unit 15 corrects the distance _{R 2} at a distance _{R 1} based on the electric energy _{P margin} margin using radio wave propagation characteristics (curve k3). Then, the correction means 15 sets a range of a circle centered on the position (x _G , y _G ) of the primary user and having a radius of the distance R ₁ (correction distance) as a correction communication range of the primary user.

  FIG. 24 is a diagram for explaining a method of correcting the communication range of the secondary user. In FIG. 24, the vertical axis represents the power of the secondary user, and the horizontal axis represents the distance from the secondary user.

  Referring to FIG. 24, a curve k4 is a propagation characteristic of a radio wave estimated from communication conditions when performing wireless communication using a shared frequency. A curve k4 is a propagation characteristic of a radio wave estimated using a radio wave propagation model such as a radio wave free space propagation model.

The distance r ₂ is the radius r obtained by the method described above, a communication range of the secondary user estimated by the estimating means 14A.

After determining the power amount P _margin of the _margin , the correction unit 15 calculates the power P ₈ of the secondary user corresponding to the distance r ₂ based on the curve k4, and calculates the power P ₈ of the secondary user from the obtained power P ₈ of the secondary user. by subtracting the electric power amount _{P margin} margin seeking power _{P 7} of the secondary user obtains the distance _{r 1} corresponding to the power _{P 7} of the determined secondary user. That is, the correction unit 15 corrects the distance _{r 2} a distance _{r 1} based on the electric energy _{P margin} margin using radio wave propagation characteristics (curve k4). The correction means 15, the position of the secondary user (x _{i, y i)} centered on the distance r ₁ range of a circle _(corrected distance) the radius as a correction communication range of the secondary user.

  Then, the correction unit 15 stores the corrected communication range of the primary user and the corrected communication range of the secondary user in the storage unit 12.

  FIG. 25 is a conceptual diagram of the corrected communication range. Referring to FIG. 25, communication range REG_cm1 is the estimated communication range of the primary user estimated by estimating unit 14A, and communication range REG_cm2 is the corrected communication range of primary user corrected by correcting unit 15. It is. The communication range REG_cm3 is the estimated communication range of the secondary user estimated by the estimating unit 14A, and the communication range REG_cm4 is the corrected communication range of the secondary user corrected by the correcting unit 15.

As described above, the correcting unit 15 corrects the primary user's estimated communication range REG_cm1 to the primary user's corrected communication range REG_cm2 based on the power amount P _{margin of the} margin, and corrects the primary user's estimated communication range REG_cm2. Is corrected to the secondary user's corrected communication range REG_cm4 so as to widen the estimated communication range REG_cm3.

  Note that the correction unit 15 determines the communication range of the primary user and the communication range of the secondary user for all of the primary user and the secondary user whose communication ranges are close to each other by the above-described method. Is corrected.

[Judgment of interference]
A method for determining the presence or absence of interference will be described. FIG. 26 is a diagram for explaining a method of determining whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other.

Referring to FIG. 26, the correction communication range of the primary user, the position of the primary user (x _{G, y G)} ranges from a distance R _1, correction communication range of the secondary user, position of the secondary user _(x i, _{y i)} in the range from a distance _{r 1.}

The determining means 16 detects the center (x _G , y _G ) and the radius R ₁ of the primary user's corrected communication range stored in the storage means 12. Further, the determination unit 16 detects the center (x _i , y _i ) and the radius r ₁ of the corrected communication range of the secondary user stored in the storage unit 12. The determination means 16, the center _(x G, _{y G)} and the center _(x i, _{y i)} and calculates the distance D between.

  Then, the determination means 16 determines whether or not the primary user's wireless communication and the secondary user's wireless communication interfere by determining whether or not the following equation is satisfied.

  More specifically, when determining that Expression (3) holds, the determining unit 16 determines that the wireless communication of the primary user and the wireless communication of the secondary user interfere with each other, and Expression (3) holds. When it is determined that the wireless communication is not performed, it is determined that the wireless communication of the primary user and the wireless communication of the secondary user do not interfere.

  When Expression (3) holds, the corrected communication range REG_cm2 of the primary user shown in FIG. 25 contacts or intersects with the corrected communication range REG_cm4 of the secondary user shown in FIG. When the primary user's corrected communication range REG_cm2 is in contact with the secondary user's corrected communication range REG_cm4, a terminal located at the contact point between the primary user's corrected communication range REG_cm2 and the secondary user's corrected communication range REG_cm4. The device (any one of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) receives both the radio wave transmitted from the primary user and the radio wave transmitted from the secondary user. It is possible.

  Also, when the primary user's corrected communication range REG_cm2 intersects with the secondary user's corrected communication range REG_cm4, it exists in both the primary user's corrected communication range REG_cm2 and the secondary user's corrected communication range REG_cm4. Terminal device (one of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) performs both the radio wave transmitted from the primary user and the radio wave transmitted from the secondary user. Can be received.

  Thus, when the primary user's corrected communication range REG_cm2 touches or intersects with the secondary user's corrected communication range REG_cm4, the primary user's wireless communication and the secondary user's wireless communication interfere.

Therefore, when Expression (3) is satisfied, that is, when the distance D is equal to or less than the sum of the radius R ₁ and the radius r ₁ (= R ₁ + r ₁ ), the determining unit 16 determines whether the primary user's wireless communication Is determined to interfere with the secondary user's wireless communication.

  On the other hand, when Expression (3) does not hold, the corrected communication range REG_cm2 of the primary user shown in FIG. 25 does not touch and does not cross the corrected communication range REG_cm4 of the secondary user shown in FIG. (See FIG. 26). As a result, the terminal device (any of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) existing in the primary user's corrected communication range REG_cm2 was transmitted from the secondary user. The terminal device (any of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) which does not receive the radio wave and is within the corrected communication range REG_cm4 of the secondary user is transmitted from the primary user. Does not receive transmitted radio waves.

  In this manner, when the primary user's corrected communication range REG_cm2 does not touch or cross the secondary user's corrected communication range REG_cm4, the primary user's wireless communication and the secondary user's wireless Does not interfere with communication.

Therefore, when the formula (3) is not satisfied, that is, when the distance D is larger than the sum of the radius R ₁ and the radius r ₁ (= R ₁ + r ₁ ), the determination unit 16 performs the wireless communication of the primary user. Is determined not to interfere with the secondary user's wireless communication.

  The determination unit 16 determines, for all the primary users and all the secondary users (all of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7), the primary user by the above-described method. It is determined whether or not the wireless communication of the secondary user interferes with the wireless communication of the secondary user.

  The above-described method of determining the presence / absence of interference is a method on the assumption that the primary user and the secondary user share the same frequency band.

  FIG. 27 is a conceptual diagram of a table showing a determination result of the presence or absence of interference between the wireless communication of the primary user and the wireless communication of the secondary user. Referring to FIG. 27, table TBL-1 includes a primary user ID and a secondary user ID. “1” indicates that the primary user's wireless communication and the secondary user's wireless communication interfere with each other, and “0” indicates the primary user's wireless communication and the secondary user's wireless communication. Does not interfere.

  Accordingly, the wireless communication of the primary user having the primary user ID of “0” is performed by the secondary user having the secondary user ID of “2” (the plurality of terminal devices 2, 6, the plurality of sensors 5). And any of the plurality of robots 7), and the secondary user (the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7) having the secondary user ID of "3". Do not interfere with any of the wireless communications.

  The wireless communication of the primary user having the primary user ID of “1” is performed by the secondary user having the secondary user ID of “2” (the plurality of terminal devices 2, 6, the plurality of sensors 5). And a secondary user (a plurality of terminal devices 2, 6, a plurality of sensors 5, and a plurality of robots 7) having a secondary user ID of "3" without interfering with wireless communication of any of the robots 7 and 7. ) Interfere with wireless communication.

  The determining unit 16 determines whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other by the above-described method, and determines whether the primary user's wireless communication and the secondary user's wireless communication interfere with each other. A table TBL-1 indicating the result of determining the presence or absence of interference with communication is created, and the created table TBL-1 is output to the setting unit 17. In this case, “1” described at the intersection of the primary user ID and the secondary user ID in the table TBL-1 causes interference between the wireless communication of the primary user and the wireless communication of the secondary user. And the determination result D_YES indicating that the primary user ID and the secondary user ID are set to “0” described at the intersection of the primary user ID and the secondary user ID. Constitute a determination result D_NO indicating that no interference occurs.

  A method for setting the communication conditions of the secondary user's wireless communication when it is determined that the primary user's wireless communication and the secondary user's wireless communication do not interfere will be described.

  FIG. 28 is a diagram illustrating a corrected communication range of the primary user and a corrected communication range of the secondary user. Referring to FIG. 28, when the wireless communication of the primary user and the wireless communication of the secondary user do not interfere, the corrected communication range of the primary user may be in contact with the corrected communication range of the secondary user. There is no crossing.

Therefore, setting means 17, the determination result upon receiving the D_NO, correction communication range of the secondary user (secondary users position _(x i, _{y i)} and a radius _{r 1)} and radio wave propagation characteristics (in FIG. 24 The curve k4) is read from the storage means 12. The setting means 17 determines the transmission power P _t of the secondary user so that the position of the reach of radio waves secondary user (x _{i, y i)} from within the correction communication range of the secondary user I do. Further, the setting unit 17 determines a shared frequency _fcom to be shared with the primary user.

Then, the setting unit 17 generates the communication condition CDT = [secondary user ID / _Pt / _fcom ] including the secondary user ID, the transmission power _Pt, and the shared frequency _fcom, and generates the generated communication. The condition CDT = [secondary user ID / _Pt / _fcom ] is output to the transmitting means 18. The setting unit 17 generates the communication condition CDT for all of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7, and outputs the generated communication condition CDT to the transmission unit 18.

  The transmitting unit 18 receives the communication condition CDT from the setting unit 17, and transmits the received communication condition CDT to all of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7.

FIG. 29 is a flowchart for explaining the operation of communication estimation device 1C shown in FIG. Referring to FIG. 29, when the operation of communication estimation device 1C is started, correction unit 15 determines a power amount P _margin of the _margin (step S61). In this case, the correction unit 15 includes the estimation result (one of the signal S _TDD , the signal S _A , the signal S _F , the signal S _OF , the signal S _CD , the signal _SP, and the signal S _TC received from the communication estimation unit 13. ) Is other than the cellular system or the television broadcast (ie, when a signal other than the signal _STC is received), the estimation result (the signal S _TDD , the signal S _A ) is referred to by referring to the database DB2 read from the storage unit 12. , the signal _{S F,} the signal _{S oF,} signals _{S CD,} the signal _{S P} and the signal _S to detect the allowable interference quantity AAIF _pq corresponding to either consist) of _TC, power margin allowable interference quantity AAIF _pq which the detected Determined as amount P _margin . On the other hand, the correction unit 15 receives the estimation result from the communication estimation unit 13 (constitutes any one of the signal S _TDD , the signal S _A , the signal S _F , the signal S _OF , the signal S _CD , the signal _SP, and the signal S _TC ). when There is a cellular system or a television broadcast (i.e., when receiving the signal S _TC), based on the relationship between the cumulative probability and the signal intensity (curve k1 or curve k2 in Fig. 22), probability higher than the reference probability Is detected, and the detected signal strength is determined as a _margin power amount _Pmargin .

Then, after step S61, the correction unit 15 corrects the estimated communication range of the primary user to the corrected communication range of the primary user by the above-described method based on the determined margin power amount P _margin , The estimated communication range of the secondary user is corrected to the corrected communication range of the secondary user (step S62).

  Thereafter, steps S4 to S6 described above are sequentially executed, and the operation of the communication control device 1A ends.

  Thereafter, based on the corrected communication range of the primary user and the corrected communication range of the secondary user, the judging means 16 determines the interference between the wireless communication of the primary user and the wireless communication of the secondary user by the method described above. Is determined (step S63), and the determination result is output to the setting unit 17.

When the wireless communication of the primary user and the wireless communication of the secondary user do not interfere with each other, the setting unit 17 receives the determination result D_NO from the determination unit 16 and, in accordance with the received determination result D_NO, the secondary user The communication conditions of the secondary user are set based on the corrected communication range (step S64). More specifically, setting means 17, the position ranges secondary user the reach of radio waves (x _{i, y i)} transmission power of a secondary user to consist in correcting a communication range of the secondary user to determine the P _t. Further, the setting unit 17 determines a shared frequency _fcom to be shared with the primary user. The setting means 17 sets the transmission power P _t of the secondary user and shared frequency f _com as a communication condition of the secondary user.

  When the primary user's wireless communication and the secondary user's wireless communication interfere with each other, the setting unit 17 receives the determination result D_YES from the determination unit 16 and responds to the primary determination according to the received determination result D_YES. The secondary user's communication conditions are set so as to avoid interference between the user's wireless communication and the secondary user's wireless communication (step S65). Thus, the operation of the communication estimation device 1C ends.

In step S65, communication conditions are set by the following method. Setting means 17 detects the radius R ₁ of the correction communication range of the center Center1 the primary user of the primary user based on the correction communication range of the primary user stored in the storage unit 12, the storage means detecting the radius r ₁ of the correction communication range of the center Center2 the primary user of the secondary user based on the correction communication range of the secondary user stored in 12. The setting means 17 calculates the distance D between the center Center1 and the center CENTER2, when the calculated distance D is determined to be greater than the radius _{R 1} and radius _{r 1,} 1 primary user of the wireless communication and 2 The power of the secondary user is adjusted so as to avoid interference with the wireless communication of the secondary user, or the directivity of radio waves transmitted from the secondary user is adjusted. When the distance D is greater than the radius R ₁ and the radius r ₁ , the secondary user's power or radio wave directivity is adjusted because the center position of the secondary user is outside the corrected communication range of the primary user. By doing so, it is possible to avoid interference between the wireless communication of the primary user and the wireless communication of the secondary user.

The setting means 17, when the distance D is determined to be smaller than the radius R ₁ or radius r _1, and stops the radio communication of the secondary user. When the distance D is smaller than the radius R ₁ or the radius r ₁ , the secondary user's power or radio wave directivity is adjusted because the center position of the secondary user is within the corrected communication range of the primary user. Even so, the corrected communication range of the secondary user partially overlaps with the corrected communication range of the primary user, and interference between the wireless communication of the primary user and the wireless communication of the secondary user cannot be avoided. is there.

  In the embodiment of the present invention, the presence or absence of interference between the wireless communication of the primary user and the wireless communication of the secondary user may be determined by the following method.

FIG. 30 is a diagram for describing a method of calculating a reception SINR (Signal to Interference Plus Noise Ratio). The reception power P _rcv is represented by the following equation.

In Equation (4), P _trans is transmission power, and P _PL is path loss in a radio wave propagation path.

Path loss _{P PL} is expressed by the following equation.

In equation (5), d is the distance between the transmitter of the primary user and the receiver of the primary user, or the distance between the transmitter of the secondary user and the receiver of the primary user. _Fc is the frequency of the radio wave.

Referring to FIG. 30, determination means 16, a path loss P _PL1 in the path between the primary user of the transmitter and the primary user of the receiver, secondary user transmitter and the primary user determining a path loss P _PL2 in the path between the receiver. The determination unit 16 based on the transmission power _{P t} 1 of the primary user calculates the _{SINR_1 = P t 1-P PL1} , based on the transmit power _{P t} 2 the secondary user SINR_2 _{= P} t 2 -Calculate _PL2 . Thereafter, the determination means 16 calculates ΔSINR = SINR_1−SINR_2, and determines that there is no interference between the wireless communication of the primary user and the wireless communication of the secondary user when the calculated ΔSINR is equal to or smaller than the allowable SINR. (That is, it is determined that the primary user and the secondary user can share). On the other hand, when ΔSINR is larger than the allowable SINR, the determination unit 16 determines that there is interference between the wireless communication of the primary user and the wireless communication of the secondary user.

In this case, the primary user of the transmission power _P t _1 is known, secondary user of the transmission power _P t _2, the sample data _{D SPL} _i transmission information INFO _T _i in the included in the communication communication device 1C Shall be sent to

Note that the path loss P _PL, refers to the degree to which the radio wave radiated from the transmitter is attenuated by distance and frequency. Then, the attenuation increases as the distance between the transmitter and the receiver increases, and the attenuation increases as the frequency increases.

An example in which the reception SINR is calculated when the transmission power of the primary user is 20 dBm and the transmission power of the secondary user is 10 dBm will be described. The judging means 16 detects the center (= centroid [x _G , y _G ]) of the communication range of the two primary users from the communication range of the primary user stored in the storage means 12, Detect the position of the primary user's transmitter and primary user's receiver.

Then, the determining means 16 determines the distance d ₁ between the primary user's transmitter and the primary user's receiver based on the detected positions of the primary user's transmitter and the primary user's receiver. Is calculated, and the calculated distance d ₁ and the frequency f _c (= shared frequency) are substituted into Expression (5) to calculate the path loss P _PL1 (= 80 dB).

The determination means 16, the position of the secondary user transmitter (position of the transmission source terminal device ID _i) detected from the sample data D _{SPL _i,} and the position of the detected secondary user transmitter and calculates the distance d ₂ between the primary user of the receiver. The determination unit 16 calculates the path loss _P PL2 (= 90 dB) by substituting the the calculated distance _{d 2} and the frequency _f c (= shared frequency) into equation (5).

Thereafter, the determination unit 16, a path loss _{P PL1} transmit power and 80dB of 20dBm into Equation (4), the radio waves from the primary user of the transmitter in the primary user of the receiver SINR_1 = 20- Calculate 80 = −60 dBm. The determination means 16, the path loss _{P PL2} transmit power and 90dB of 10dBm into Equation (4), SINR_2 = 10- of radio waves from the secondary users of a transmitter in the primary user of the receiver Calculate 90 = −80 dBm. Further, the determination means 16 calculates the received SINR at the primary user's receiver by calculating ΔSINR = SINR_1−SINR_2 = −60 − (− 80) = 20 dB.

  Then, when the calculated reception SINR is equal to or smaller than the allowable SINR, the determination unit 16 determines that there is no interference between the primary user's wireless communication and the secondary user's wireless communication. Is larger, it is determined that there is interference between the wireless communication of the primary user and the wireless communication of the secondary user.

  Then, the determination unit 16 outputs the determination result of the presence or absence of the interference to the setting unit 17. The setting unit 17 receives the determination result of the presence / absence of interference from the determination unit 16, and when the received determination result indicates that there is interference, sets the communication conditions (transmission power etc.) of the secondary user so that ΔSINR becomes smaller than the allowable SINR. ) Is set.

  When the communication method or the modulation method is CDMA modulation, the setting unit 17 may set the transmission power of the secondary user to be higher than the transmission power of the primary user. CDMA modulation is a modulation method that is highly resistant to interference waves, and generally allows communication even when the power ratio of the primary user and the secondary user is reversed.

  FIG. 31 is a flowchart for explaining the detailed operation of step S63 in FIG. 29 when the reception SINR is used.

Referring to FIG. 31, after step S62 in FIG. 29, determination means 16 reads sample data D _{SPL —} i from storage means 12, and transmits the primary user based on the read sample data D _{SPL —} i. The position of the device, the position of the primary user's receiver, and the position of the secondary user's transmitter are detected (step S631). Here, it is assumed that primary users transmit and receive radio waves, and a transmitter of the secondary user exists within a range where the radio waves reach the receiver of the primary user. Therefore, of the two communication devices of the primary user that transmit and receive radio waves, one is the transmitter of the primary user and the other is the receiver of the primary user. The terminal device that transmits the radio wave is the transmitter of the secondary user. The determination unit 16 determines that, in the two pieces of reception information INFO _{R —} j and INFO _{R —} j ′ of the sample data D _{SPL —} i, the terminal apparatus in which the two pieces of identification information ID _{SRCi —} j and ID _{SRCi —} j ′ of the _source are both primary users The position information [x _i , y _i ] of the (terminal device having the identification information ID _i ) is detected as the position of the transmitter of the secondary user. Further, the determination means 16 determines the center position of the primary user's corrected communication range having one of the identification information ID _{SRCi_j} and ID _{SRCi_j} 'of the two transmission sources as the position of the transmitter of the primary user. And the center position of the corrected communication range of the primary user having the other identification information of the identification information ID _{SRCi_j} and ID _{SRCi_j} 'of the two transmission sources is detected as the position of the receiver of the primary user. .

After step S631, the determination unit 16 determines whether the primary user's transmitter and the primary user's receiver are based on the position of the primary user's transmitter and the position of the primary user's receiver. calculates the distance d _1, the secondary user transmitter position and distance d ₂ between the second user of the transmitter and the primary user of the receiver based on the position of the receiver of the primary user Is calculated (step S632).

After that, the determination unit 16 calculates the path loss P _PL1 in the propagation path of the radio wave from the transmitter of the primary user to the receiver of the primary user based on the distance d ₁ by using Equation (5) (Step S633). . The determination means 16, the path loss P _PL2 in the propagation path of a radio wave from based on the distance d ₂ 2 primary user of the transmitter to the primary user of the receiver is calculated by the equation (5) (Step S634) .

Then, the determination unit 16 based on the transmission power and path loss _{P PL1} of the primary user and calculates the reception power Prcv1 in the primary user of the receiver by Equation (4) (step S635), the secondary user based on the transmission power and path loss _{P PL2} calculates the reception power Prcv2 in the primary user of the receiver by equation (4) (step S636).

Then, the determination unit 16 calculates the SINR _primary at the _primary user's receiver by using SINR = Prcv1-Prcv2 (step S637).

Thereafter, the determination unit 16 determines whether the SINR _primary is equal to or less than the allowable SINR (step S638).

When it is determined in step S638 that the SINR _primary is not less than the allowable SINR, the determination unit 16 determines that there is interference between the wireless communication of the primary user and the wireless communication of the secondary user (step S639).

On the other hand, when it is determined in step S638 that the SINR _primary is equal to or less than the allowable SINR, the determination unit 16 determines that there is no interference between the wireless communication of the primary user and the wireless communication of the secondary user (step S638). S640).

  Then, after step S639 or step S640, the determination unit 16 determines whether or not all secondary users have determined whether or not there is interference (step S641).

  When it is determined in step S641 that the presence or absence of interference has not been determined for all the secondary users, the determination unit 16 detects the position of the transmitter of another secondary user (step S642). Then, a series of operations proceeds to Step S632. Thereafter, in step S641, steps S632 to S642 are repeatedly executed until it is determined that the presence or absence of interference has been determined for all the secondary users.

  Then, when it is determined in step S641 that the presence or absence of interference has been determined for all the secondary users, the determination unit 16 determines whether or not the presence or absence of interference has been determined for all the primary users (step S641). Step S643).

  When it is determined in step S643 that the presence or absence of interference has not been determined for all the primary users, the determination unit 16 detects the positions of the transmitter and the receiver of another primary user (step S644). ). Then, a series of operations proceeds to Step S632. Thereafter, in step S643, steps S632 to S644 are repeatedly executed until it is determined that interference has been determined for all the primary users.

  If it is determined in step S643 that the presence or absence of interference has been determined for all the primary users, the determination unit 16 creates determination results of the presence or absence of interference for all of the primary users and the secondary users. Then, the created judgment result is output to the setting means 17 (step S645). Thereafter, a series of operations proceeds to step S64 in FIG.

  As described above, the determination unit 16 determines whether there is interference between the wireless communication of the primary user and the wireless communication of the secondary user using the received SINR, and outputs the determination result to the setting unit 17.

  FIG. 32 is a diagram showing another shape of the communication range of the primary user and the secondary user. In the above description, the communication range of the primary user and the secondary user or the corrected communication range has been described as having a circular shape. However, the embodiment of the present invention is not limited to this, and the primary user and the corrected communication range are not limited to this. The communication range or the corrected communication range of the secondary user may be elliptical (see FIG. 32 (a)) or polygonal such as a quadrangle and a pentagon (FIG. 32 (b), (See (c)), and in general, may be any shape (see (d) in FIG. 33).

  FIG. 33 shows the communication range (or the corrected communication range) of the primary user and the secondary user when the communication range (or the corrected communication range) of the primary user and the secondary user has an arbitrary shape. It is a figure for explaining an index. In FIG. 33, an index indicating the communication range of the primary user and the secondary user will be described, but the same applies to an index indicating the corrected communication range of the primary user and the secondary user.

  Referring to FIG. 33, communication range CM_REG1 of the primary user and communication range CM_REG2 of the secondary user have arbitrary shapes. The primary user communication range CM_REG1 has a center O1, and the secondary user communication range CM_REG2 has a center O2.

Then, the length of a line Segment connecting the center O1 and the center O2 is obtained as the distance D. Also, is parallel to the line segment Line, and, from the center O1 in the direction from the center O1 to the center O2, the primary user of the communication range of the distance _{d 1} of the primary user to the line defining the communication range CM_REG1 An index representing CM_REG1.

Also, is parallel to the line segment Line, and, from the center O2 in the direction from the center O2 to the center O1, to the line that defines the communication range CM_REG2 secondary user distance _{d 2} to the secondary user communication range An index representing CM_REG2.

The indices d ₁ and d ₂ are used instead of the above-mentioned radii R ₁ and r ₁ , respectively, and in the flowchart shown in FIG. 29, the setting of the communication condition of the secondary user and the wireless communication of the primary user Is used to determine the presence or absence of interference between the secondary user and the wireless communication of the secondary user, and to arbitrate the communication conditions of the secondary user.

  The communication range CM_REG1 of the primary user and the communication range CM_REG2 of the secondary user may have the same shape or different shapes.

  In the embodiment of the present invention, the operation of communication estimation device 1 may be executed by software. In this case, the communication estimation device 1 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory).

The ROM stores the program Prog_A having the flowchart shown in FIG. 8 (including the flowcharts shown in FIGS. 9 to 11) or the program Prog_B having the flowchart shown in FIG. Then, the CPU reads one of the programs Prog_A and Prog_B from the ROM, and executes one of the read programs Prog_A and Prog_B to estimate the communication method or modulation method of the primary user and the secondary user. RAM temporarily stores database DB1 and the sample data _{D SPL} _i like.

  In the embodiment of the present invention, the operation of communication estimation device 1A may be executed by software. In this case, the communication estimation device 1A includes a CPU, a ROM, and a RAM.

The ROM stores the program Prog_C having the flowchart shown in FIG. 14 (including the flowchart shown in FIG. 15), the program Prog_D having the flowchart shown in FIG. 16, or the program Prog_E having the flowchart shown in FIG. Then, the CPU reads one of the programs Prog_C, Prog_D, and Prog_E from the ROM, and executes one of the read programs Prog_C, Prog_D, and Prog_E to estimate the wave source position. RAM is the average _{(x A, y A),} (Δx A, Δy A), the signal _{S TDD,} the signal _{S A,} the signal _{S F,} the signal _{S OF,} signals _{S CD,} signal _{S P,} the signal _{S TC,} sample data The D _{SPL —} i and the already estimated wave source position [x _G , y _G ] are temporarily stored.

  Further, in the embodiment of the present invention, the operation of communication estimation device 1B may be executed by software. In this case, the communication estimation device 1B includes a CPU, a ROM, and a RAM.

The ROM stores a program Prog_F including the flowchart shown in FIG. Then, the CPU reads the program Prog_F from the ROM, and executes the read program Prog_F to estimate the communication range of the primary user and the communication range of the secondary user. The RAM temporarily stores the sample data D _{SPL —} i, the estimated position of the primary user, and the distance at which the received power becomes a set value.

  Further, in the embodiment of the present invention, the operation of communication estimation device 1C may be executed by software. In this case, the communication estimation device 1C includes a CPU, a ROM, and a RAM.

The ROM stores a program Prog_G consisting of the flowchart shown in FIG. 29 or a program Prog_H consisting of the flowchart shown in FIG. 29 (including the flowchart shown in FIG. 31). Then, the CPU reads one of the programs Prog_F and Prog_H from the ROM, and executes one of the read programs Prog_F and Prog_H to set the communication range of the primary user and the communication range of the secondary user respectively to the primary. The corrected communication range of the user and the corrected communication range of the secondary user are corrected, and the wireless communication of the primary user is performed based on the corrected corrected communication range of the primary user and the corrected communication range of the secondary user. And determine whether or not there is interference with the secondary user's wireless communication, and according to the determination result of whether or not there is interference, make sure that the primary user's wireless communication and the secondary user's wireless communication do not interfere with each other. The communication conditions of the secondary user are set, or the communication conditions of the secondary user are arbitrated so as to avoid interference between the wireless communication of the primary user and the wireless communication of the secondary user. The RAM temporarily stores the radii R ₁ , r ₁ (indexes d ₁ , d ₂ ), the received power RSSI _i , the distance D, the communication conditions, and the like.

  According to the above-described embodiment, the communication estimating apparatus according to the embodiment of the present invention transmits, from a plurality of terminal devices, sample data for a predetermined time including received power, a received signal, frequency of the received signal, and identification information of a transmission source. Receiving means for receiving, storage means for storing a plurality of sample data of a plurality of terminal devices received by the receiving means, and primary user and secondary usage based on the plurality of sample data stored in the storage means Communication estimating means for executing a first estimating process for estimating a communication method or a modulation method of a user.

  By obtaining the received power, the received signal, the sampled data for a certain period of time including the frequency of the received signal and the identification information of the transmission source from a plurality of terminal devices, by performing the first estimation process based on the plurality of sampled data, This is because the communication method or modulation method of the primary user and the secondary user can be estimated.

  Also, according to the program according to the embodiment of the present invention, the receiving means receives the sample data for a fixed time including the received power, the received signal, the frequency of the received signal, and the identification information of the transmission source from a plurality of terminal devices. Step, a second step in which the storage means stores a plurality of sample data of the plurality of terminal devices received by the reception means, and a communication estimation means, based on the plurality of sample data stored in the storage means, A program for causing a computer to execute the third step of performing the first estimation processing for estimating the communication method or modulation method of the primary user and the secondary user may be used.

  This is because, if the first to third steps are executed by a computer, the communication method or modulation method of the primary user and the secondary user can be estimated based on a plurality of sample data.

  The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description of the embodiments, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is applied to a communication estimation device, a program to be executed by a computer, and a computer-readable recording medium storing the program.

  1, 1A, 1B, 1C communication estimation device, 2, 6 terminal device, 3, 4 base station, 5 sensor, 7 robot, 8 wire cable, 10 wireless communication system, 11 receiving means, 12 storage means, 13 communication estimation means , 14, 14A estimation means, 15 correction means, 16 determination means, 17 setting means, 18 transmission means.

Claims (17)

Received power, received signal, receiving means for receiving the sample data in a certain time including the identification information of the frequency and the source of the received signal from a plurality of terminal devices,
Storage means for storing a plurality of the sample data of a plurality of terminal devices received by the receiving means,
Communication estimating means for performing a first estimating process for estimating a communication method or a modulation method of a primary user and a secondary user based on the plurality of sample data stored in the storage means; apparatus.   In the first estimation process, the communication estimating means may include, when the identification information of the transmission source included in the sample data from one terminal device is identification information of a plurality of primary users, And the secondary user's communication method is estimated to be time-division duplex, and when the first received power among a plurality of received powers included in the sample data from one terminal device has shifted in frequency, It is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation, and the variation width of a plurality of reception powers included in sample data from one terminal device is equal to or less than a threshold value. , It is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation, and fluctuations of a plurality of reception powers included in sample data from one terminal apparatus are obtained. 2. The method according to claim 1, wherein when the power of the one terminal device is more than twice the power of the own signal, the modulation scheme of the primary user and the secondary user is estimated to be OFDM modulation, AM modulation, or ASK modulation. 3. The communication estimation device according to 1.   When the communication estimating means estimates that the modulation scheme of the primary user and the secondary user is OFDM modulation, AM modulation, or ASK modulation, the communication estimating means further calculates an autocorrelation of the received signal, and performs the calculation. When the autocorrelation consists of two periodically appearing peaks, it is estimated that the modulation scheme of the primary user and the secondary user is OFDM modulation, and when the autocorrelation does not consist of two periodically appearing peaks. The communication estimating apparatus according to claim 2, wherein the primary user and the secondary user are estimated to use AM modulation or ASK modulation.   When the communication estimating means estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation, the communication estimating means further calculates the autocorrelation of the received signal, and calculates the correlation. When the autocorrelation consists of one peak that appears periodically, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, and when the autocorrelation does not consist of one peak that appears periodically. 3. The communication estimating apparatus according to claim 2, wherein the primary user and the secondary user are estimated to use a modulation scheme of FM modulation or FSK modulation.   When the communication estimating means estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation, the communication estimating means further calculates an autocorrelation of the received signal, and calculates the calculated autocorrelation. When one peak appears periodically, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, and when the autocorrelation does not consist of one peak that appears periodically, The communication estimation device according to claim 2, wherein the modulation scheme of the secondary user and the secondary user is estimated to be PSK modulation.   The communication estimating means may be configured such that, in the first estimating process, the communication method of the primary user and the secondary user is not time division duplex, and the modulation method of the primary user and the secondary user When is not any of OFDM modulation, AM modulation, ASK modulation, CDMA modulation, FM modulation, FSK modulation and PSK modulation, it is estimated that the communication system of the primary user is a cellular system or a television broadcast. The communication estimation device according to claim 2. The storage means further stores a database in which the frequency band, the communication method, the modulation method, and the system bandwidth are associated,
The communication estimation unit performs a second estimation process of estimating a communication system or a modulation system of the primary user and the secondary user based on the database stored in the storage unit as the first estimation process. The communication estimation device according to any one of claims 1 to 6, wherein the communication estimation device is additionally executed.   The communication estimating means detects the communication system or the modulation system corresponding to the frequency band and the system bandwidth based on the database in the second estimating process, thereby detecting the primary user and the secondary user. The communication estimating device according to claim 7, wherein the communication estimating device estimates the communication method or the modulation method. A first step in which receiving means receives, from a plurality of terminal devices, sample data for a predetermined time including received power, a received signal, a frequency of the received signal, and identification information of a transmission source;
A second step of storing a plurality of the sample data of a plurality of terminal devices received by the receiving means;
A third estimating unit that executes a first estimating process of estimating a communication system or a modulation system of a primary user and a secondary user based on the plurality of sample data stored in the storage unit; A program for causing a computer to execute the steps.   The communication estimating means may be configured such that, in the first estimating process of the third step, when the identification information of the transmission source included in the sample data from one terminal device is identification information of a plurality of primary users , It is assumed that the communication scheme of the primary user and the secondary user is time division duplex, and the first received power among the plurality of received powers included in the sample data from one terminal device is shifted in frequency. In this case, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation, and fluctuations of a plurality of reception powers included in sample data from one terminal apparatus are performed. When the width is equal to or less than the threshold value, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation, and is included in sample data from one terminal device. When the fluctuation width of the number of received powers is more than twice the power of the own signal in the one terminal device, the modulation scheme of the primary user and the secondary user is OFDM modulation, AM modulation, or ASK modulation. A program for causing a computer according to claim 9 to execute the program.   The communication estimating means, when estimating in the third step that the modulation scheme of the primary user and the secondary user is OFDM modulation, AM modulation or ASK modulation, further comprises: When the calculated autocorrelation consists of two peaks that appear periodically, it is estimated that the modulation scheme of the primary user and the secondary user is OFDM modulation, and the autocorrelation is periodically calculated. 11. The program for causing a computer to execute according to claim 10, wherein when not consisting of two appearing peaks, the modulation scheme of the primary user and the secondary user is estimated to be AM modulation or ASK modulation.   When the communication estimating unit estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation, FM modulation, or FSK modulation in the third step, Is calculated, and when the calculated autocorrelation consists of one peak that appears periodically, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, and the autocorrelation is periodically calculated. The program for causing a computer to execute according to claim 10, wherein when not consisting of one appearing peak, the modulation scheme of the primary user and the secondary user is estimated to be FM modulation or FSK modulation.   The communication estimating means further calculates the autocorrelation of the received signal when the third step estimates that the modulation scheme of the primary user and the secondary user is CDMA modulation or PSK modulation. When the calculated autocorrelation consists of one peak that appears periodically, it is estimated that the modulation scheme of the primary user and the secondary user is CDMA modulation, and the one that the autocorrelation appears periodically is one. The program for causing a computer to execute according to claim 10, wherein when the peak does not occur, the modulation scheme of the primary user and the secondary user is estimated to be PSK modulation.   The communication estimating means may be configured such that, in the first estimating process of the third step, the communication method of the primary user and the secondary user is not time division duplex, and the primary user and the secondary user When the modulation scheme of the next user is not any of OFDM modulation, AM modulation, ASK modulation, CDMA modulation, FM modulation, FSK modulation, and PSK modulation, the communication scheme of the primary user is a cellular system or a television broadcast. A program for causing a computer according to any one of claims 10 to 13 to execute the program. The storage means further stores a database in which the frequency band, the communication method, the modulation method, and the system bandwidth are associated in the second step,
In the third step, the communication estimating means performs a second estimating process of estimating a communication method or a modulation method of the primary user and the secondary user based on the database stored in the storage means. The program for causing a computer to execute according to any one of claims 9 to 14, which is executed in addition to the first estimation process.   The communication estimation unit detects the communication system or the modulation system corresponding to the frequency band and the system bandwidth based on the database in the second estimation process of the third step, thereby performing the primary use. The program for causing a computer according to claim 15 to estimate a communication method or a modulation method of a user and a secondary user.   A computer-readable recording medium on which the program according to any one of claims 9 to 16 is recorded.

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