JP6959638B2 - Communication systems, communication methods and programs - Google Patents

Description

The present invention relates to communication systems, communication methods and programs.

In recent years, a technique has been used in which an individual is authenticated using a communication terminal such as a mobile terminal and electronic payment such as point addition is performed. However, the network environment of mobile terminals is unstable depending on the situation, and it has been difficult to make electronic payments such as adding points under such circumstances. Therefore, it is considered to perform communication using the network environment of the store side instead of the network environment of the mobile terminal to perform electronic payment such as point addition.

In this way, in order to perform electronic payment using the network environment on the store side, for example, it is known that a personal ID is acquired from a mobile terminal and processed by proximity communication using an inductive RFID (Radio Frequency Identifier). ing. However, not all mobile terminals are provided with an RF (Radio Frequency) tag. Therefore, various techniques for authenticating such communication terminals by proximity communication have been proposed.

For example, Patent Document 1 proposes a technique for authenticating using voice as a transmission medium, such as outputting voice as transmission data on the mobile terminal side and acquiring transmission data from the received voice. ..

International Publication No. 2012/046885

However, in the technique described in Patent Document 1, the output voice is recorded, and it is easily fraudulent by being played back later, and stable communication cannot be ensured to receive the voice accurately. There was a problem such as not being able to do it. Therefore, it is still insufficient in terms of stability and security of communication using voice as a transmission medium.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a communication system, a communication method, and a program capable of improving the stability and security of communication using voice as a transmission medium. It is supposed to be.

(1) In order to achieve the above object, the communication system according to the first aspect of the present invention is
A store terminal installed in a store, a communication system including a communication terminal owned by the user, and a communicatively a server connected to each other via a network before Symbol shop terminal,
The store terminal is
An authentication information generation means that generates authentication information that can be used only for one-time authentication when the user detects that they are close to each other.
An authentication information transmitting means for transmitting the authentication information generated by the authentication information generating means to the communication terminal by voice, and an authentication information transmitting means.
A receiving means for receiving transmission information, which is information to be transmitted from the communication terminal, by voice, and
The demodulation information transmitting means for demodulating the transmission information received by the receiving means and transmitting the transmission information to the server via the network is provided.
The communication terminal is
An authentication information receiving means for receiving the authentication information by voice from the store terminal,
The transmission information includes a transmission means including the authentication information received by the authentication information receiving means and transmitted by voice to the store terminal.
The server
A demodulated information receiving means for receiving the demodulated transmission information from the store terminal, and
A payment processing means that performs payment processing based on the transmission information received by the demodulation information receiving means, and
A payment result transmission means for transmitting the payment result in the payment processing means to the store terminal via the network is provided.
The store terminal further includes a payment result reception display means for receiving and displaying the payment result from the server.
It is characterized by that.

(2) Further, the communication system according to the second aspect of the present invention is
A communication terminal owned by a user, a store terminal installed in a store, a relay terminal that relays communication between the communication terminal and the store terminal, and the store terminal are connected to each other via a network so as to be able to communicate with each other. A communication system that includes a server
The communication terminal includes a transmission means for transmitting transmission information, which is information to be transmitted, to the relay terminal by voice.
The relay terminal is
A receiving means for receiving transmission information by voice from the communication terminal, and
A demodulated information transmitting means that demodulates the transmitted information received by the receiving means and transmits it to the store terminal by short-range wireless communication is provided.
The store terminal is
A demodulated information receiving means for receiving the demodulated transmission information, and
A transmission information transmitting means for transmitting transmission information received by the demodulation information receiving means to the server via the network is provided.
The server
A transmission information receiving means for receiving the transmission information from the store terminal, and
A payment processing means that performs payment processing based on the transmission information received by the transmission information receiving means, and
A payment result transmission means for transmitting the payment result in the payment processing means to the store terminal via the network is provided.
The store terminal,
A payment result reception display means for receiving and displaying the payment result from the server ,
The payment result and reception display unit radio transmitting means for transmitting the payment result received to the relay terminal by short-range wireless communication, further example Bei a,
The relay terminal further includes a voice transmission means that receives the payment result from the store terminal and transmits the payment result by voice to the communication terminal.
The communication terminal is
A voice receiving means for receiving the payment result by voice from the relay terminal,
A demodulation display means for demodulating and displaying the payment result received by the voice receiving means is further provided.
It is characterized by that.

(3) Further, the communication system according to the third aspect of the present invention is
A communication terminal owned by a user, a store terminal installed in a store, a relay terminal that relays communication between the communication terminal and the store terminal, and the store terminal are connected to each other via a network so as to be able to communicate with each other. A communication system that includes a server
The communication terminal includes a transmission means for transmitting transmission information, which is information to be transmitted, to the relay terminal by voice.
The relay terminal is
A receiving means for receiving transmission information by voice from the communication terminal, and
A demodulated information transmitting means that demodulates the transmitted information received by the receiving means and transmits it to the store terminal by short-range wireless communication is provided.
The store terminal is
A demodulated information receiving means for receiving the demodulated transmission information, and
A transmission information transmitting means for transmitting transmission information received by the demodulation information receiving means to the server via the network is provided.
The server
A transmission information receiving means for receiving the transmission information from the store terminal, and
A payment processing means that performs payment processing based on the transmission information received by the transmission information receiving means, and
A payment result transmission means for transmitting the payment result in the payment processing means to the store terminal via the network is provided.
The store terminal,
A payment result reception display means for receiving and displaying the payment result from the server,
A control signal transmitting means for transmitting a control signal that enables the function of the receiving means by the relay terminal based on an operation by the user is further provided.
The relay terminal further includes a notification means for notifying that the function of the receiving means has been activated when the control signal transmitted from the store terminal is received.
It is characterized by that .

( 4 ) Further, in order to achieve the above object, the communication method according to the fourth aspect of the present invention is:
A store terminal installed in a store, a communication terminal and, before Symbol store communication method by a communication system including a server communicatively connected to each other via a network to a terminal, the owned by the user,
The store terminal
An authentication information generation step that generates authentication information that can be used only for one authentication when the user detects that they are close to each other.
An authentication information transmission step of transmitting the authentication information generated in the authentication information generation step to the communication terminal by voice, and an authentication information transmission step.
A reception step of receiving transmission information, which is information to be transmitted from the communication terminal, by voice, and
The demodulation information transmission step of demodulating the transmission information received in the reception step and transmitting it to the server via the network is executed.
The communication terminal
An authentication information receiving step of receiving the authentication information by voice from the store terminal, and
The transmission step of including the authentication information received by the authentication information receiving means in the transmission information and transmitting the authentication information to the store terminal by voice is executed.
The server
A demodulation information receiving step for receiving the demodulated transmission information from the store terminal, and
A payment processing step that performs payment processing based on the transmission information received in the demodulation information receiving step, and
A payment result transmission step of transmitting the payment result in the payment processing step to the store terminal via the network is executed.
The store terminal further executes a payment result reception display step of receiving and displaying the payment result from the server.
It is characterized by that.

( 5 ) Further, in order to achieve the above object, the program according to the fifth aspect of the present invention is
A store terminal installed in a store, a program in a communication system including a communication terminal owned by the user, and a server communicatively connected to each other via a network before Symbol shop terminal,
The store terminal
An authentication information generation means that generates authentication information that can be used only for one-time authentication when the user detects that they are close to each other.
An authentication information transmitting means for transmitting the authentication information generated by the authentication information generating means to the communication terminal by voice.
A receiving means for receiving transmission information, which is information to be transmitted from the communication terminal, by voice.
It functions as a demodulated information transmitting means that demodulates the transmission information received by the receiving means and transmits it to the server via the network.
The communication terminal
An authentication information receiving means for receiving the authentication information by voice from the store terminal,
The transmission information includes the authentication information received by the authentication information receiving means and functions as a transmission means for transmitting the authentication information to the store terminal by voice.
The server
Demodulated information receiving means for receiving the demodulated transmission information from the store terminal,
A payment processing means that performs payment processing based on transmission information received by the demodulation information receiving means,
The payment result in the payment processing means is made to function as a payment result transmission means for transmitting the payment result to the store terminal via the network.
Further functioning of the store terminal as a payment result reception display means for receiving and displaying the payment result from the server.
It is characterized by that.

According to the present invention, it is possible to improve the stability and safety of communication using voice as a transmission medium.

It is a block diagram which shows an example of the communication system which concerns on embodiment of this invention. It is a block diagram which shows an example of the communication terminal which concerns on embodiment of this invention. (A) is a diagram showing an example of a circuit included in the transmitting unit, and (b) is a diagram showing an example of a circuit included in the receiving unit. It is a block diagram which shows an example of the point settlement server which concerns on embodiment of this invention. It is a flowchart which shows an example of the processing of an information processing apparatus, a communication terminal, and a point settlement server. It is a flowchart which shows an example of one-time key generation processing. (A) is an example of transmitting data using a frequency modulation method, (b) is an example of transmitting data using a phase modulation method, and (c) is an example of transmitting data using a frequency modulation method and a phase modulation method. It is a figure which shows the example of transmitting data. It is a figure for demonstrating the transmission method of an audio signal. It is a flowchart which shows an example of transmission data generation processing. It is a flowchart which shows an example of the authentication process. It is a block diagram which shows an example of the authentication system in the modification. It is a figure for demonstrating the transmission method of an audio signal in a modification.

First, the communication system 1 according to the present embodiment will be described with reference to FIG.

As shown in FIG. 1, the communication system 1 includes an information processing device 100, a communication terminal 200, and a point payment server 300 capable of communicating with each other via the information processing device 100 and a network 9. As shown in the figure, it is assumed that the information processing device 100 and the communication terminal 200 are both located in the store 999. The function of the information processing device 100 in this embodiment is built in the payment terminal of the store 999, and the information processing device 100 in this embodiment is assumed to be the payment terminal of the store 999. Although the explanation is omitted, the payment terminal has a function of performing general payment processing such as product purchase.

As shown in FIG. 1, the information processing device 100 includes a storage unit 110, a control unit 120, an input unit 130, an output unit 140, a detection unit 150, a communication unit 160, and a system for connecting them to each other. It has a bus 99. The information processing device 100 in this embodiment functions as an authentication device and also as a relay device for point settlement processing such as a point awarding process. As will be described in detail later, the information processing device 100 has a function of generating a one-time key as authentication information having an expiration date and outputting it to the communication terminal 200, and a function of authenticating the validity of the communication terminal 200. doing. In addition, the user ID (membership number, password, etc.) received from the communication terminal 200 is transmitted to the point payment server 300 via the network 9 to perform point payment processing (payment processing related to point grant according to the payment amount). It has a function.

The storage unit 110 is composed of a hard disk, a memory, or the like, and stores the program 111. The program 111 is software that executes a process of generating and updating a one-time key and a process of authenticating the validity of the communication terminal 200. Although not shown, the storage unit 110 stores a one-time key generated by the one-time key generation unit 121, which will be described later, an expiration date thereof, transmission data received from the communication terminal 200, and the like.

The control unit 120 is composed of a CPU (Central Processing Unit) and the like. The control unit 120 operates according to the program 111 stored in the storage unit 110, and executes the process according to the program 111. The control unit 120 includes a one-time key generation unit 121 and an authentication processing unit 122 as main functional units provided by the program 111.

The one-time key generation unit 121 has a function of executing a process of generating a one-time key (one-time key generation process). A one-time key is information that has a predetermined expiration date and is valid only once (only in one authentication). The one-time key generation unit 121 generates a one-time key by a general method based on the detection of the detection unit 150 that the communication terminal 200 is close to the information processing device 100.

The authentication processing unit 122 has a function of executing a process (authentication process) for authenticating the validity of the communication terminal 200. When the authentication processing unit 122 receives the transmission data from the communication terminal 200, the authentication processing unit 122 authenticates whether or not the communication terminal 200 is valid based on the one-time key included in the transmission data.

The input unit 130 is a device for inputting voice data such as a microphone. Specifically, the input unit 130 receives the transmission data output from the communication terminal 200, demodulates it, and inputs it to the control unit 120.

The output unit 140 is a device for outputting audio data such as a speaker. Specifically, the output unit 140 converts (modulates) the one-time key generated by the one-time key generation unit 121 into voice data, and outputs the converted voice data of the one-time key to the communication terminal 200. Further, the output unit 140 includes a display device such as a general monitor, and the output unit 140 displays the point processing result received from the point settlement server 300.

The detection unit 150 is composed of, for example, a proximity sensor, and detects that the distance between the information processing device 100 and the communication terminal 200 is within a predetermined distance (for example, 7 cm). When the detection unit 150 detects that the communication terminal 200 is close to the information processing device 100, the detection unit 150 outputs a detection signal to the control unit 120. The one-time key generation unit 121 of the control unit 120 starts the one-time key generation process based on the detection signal. The detection unit 150 can detect that the distance between the information processing device 100 and the communication terminal 200 is within a predetermined distance (for example, 7 cm) and how much the distance is. .. The detection unit 150 in this embodiment shows an example of detecting that the distance between the information processing device 100 and the communication terminal 200 is within 7 cm as a predetermined distance, but 7 cm is just an example. The distance is not limited to 7 cm as long as the distance is such that audio data can be suitably transmitted and received. That is, a distance at which voice data can be suitably transmitted / received by an experiment or the like may be set as a predetermined distance. Further, as a predetermined distance, different distances may be set depending on the type of proximity sensor.

The communication unit 160 is an interface capable of connecting to a communication network such as the Internet. The communication unit 160 communicates with the point payment server 300 via the network 9. The communication unit 160 communicates with the communication unit 330 of the point settlement server 300 via a dedicated line, for example, and transmits / receives necessary information. Further, the communication unit 160 may have a function of transmitting and receiving necessary information by communicating by BLE (Bluetooth Low Energy), which is a Bluetooth (registered trademark) standard formulated for the purpose of low power consumption. ..

The communication terminal 200 is, for example, a mobile phone, a smartphone, a tablet terminal, or the like, and as shown in FIG. 2, the storage unit 210, the control unit 220, the input unit 230, the output unit 240, and the like are connected to each other. It is equipped with a system bus 98.

The storage unit 210 is composed of a hard disk, a memory, or the like, and stores the program 211. The program 211 is software that executes a process of generating transmission data to be output to the information processing device 100. Although not shown, the storage unit 210 contains various data such as a member number and a password, transmission data generated by the transmission data generation unit 221 described later, and a one-time key received from the information processing device 100. Voice data etc. are stored.

The control unit 220 is composed of a CPU and the like. The control unit 220 operates according to the program 211 stored in the storage unit 210, and executes the process according to the program 211. The control unit 220 includes a transmission data generation unit 221 as a main functional unit provided by the program 211.

The transmission data generation unit 221 has a function of executing a process of generating transmission data to be output to the information processing device 100 (transmission data generation process). When the transmission data generation unit 221 receives the one-time key voice data from the information processing device 100, for example, the received voice data is added (added in a demodulated state) to data such as a membership number and a password and transmitted. Generate data.

The input unit 230 is a device for inputting voice data such as a microphone. Specifically, the input unit 230 receives the one-time key voice data output from the information processing device 100, demodulates it, and inputs it to the control unit 220.

The output unit 240 is a device for outputting audio data such as a speaker. Specifically, the output unit 240 converts (modulates) the transmission data generated by the transmission data generation unit 221 into voice data, and outputs the voice data of the converted transmission data to the communication terminal 200. In this embodiment, the output unit 240 converts the transmission data into voice data, but the transmission data generation unit 221 may generate the transmission data as voice data. (It may be modulated by the transmission data generation unit 221).

Here, a communication method adopted in communication using voice as a transmission medium in the information processing device 100 and the communication terminal 200 will be described. The information processing device 100 and the communication terminal 200 employ orthogonal frequency division multiplexing (OFDM). OFDM is a method of multi-carrier transmission, in which a plurality of carrier waves are closely arranged within a predetermined frequency range so as not to interfere with adjacent carrier waves, and a limited frequency range is efficiently used. By using OFDM, it is possible to increase the number of carriers without enlarging the occupied frequency band. It is common that IFFT (Inverse Fast Fourier Transform) is used for OFDM modulation and FFT (Fast Fourier Transform) is used for demodulation. The IFFT and FFT are performed for each symbol.

Since OFDM is a multi-carrier transmission method, any one can be selected as the modulation method (primary modulation method) for each carrier wave (subcarrier). In the present embodiment, for the reason described later, a frequency modulation method (FSK) which is a first modulation method and a binary phase shift keying (BPSK) which is a second modulation method ) And are used to modulate each subcarrier.

In FSK, two subcarriers having different frequency bands are used as a pair, and different values are assigned to each. Therefore, in FSK, binary information (1 bit) can be represented by using two subcarriers per symbol.

BPSK is a phase modulation method (Phase Shift Keying: PSK) that uses waves of two phases separated by 180 °, and assigns a different value to each phase. BPSK can represent binary information (1 bit) per symbol.

In order to realize the above configuration, the output unit 140 of the information processing device 100 and the output unit 240 of the communication terminal 200, and the input unit 130 of the information processing device 100 and the input unit 230 of the communication terminal 200 each have the following circuits. .. First, FIG. 3A shows an example of the circuit configuration of the output unit 140 of the information processing device 100 and the output unit 240 of the communication terminal 200. The output unit 140 of the information processing device 100 and the output unit 240 of the communication terminal 200 include a mapping circuit 1611, a subcarrier modulation circuit 1612, an IFFT circuit 1613, and a frequency conversion circuit 1614.

The control unit 120 of the information processing device 100 and the control unit 220 of the communication terminal 200 process the data series to be transmitted, divide the data series into data of a predetermined size (1 bit), and supply each of the divided data to the mapping circuit 1611. .. The mapping circuit 1611 maps each of the divided data to each symbol section of each subcarrier. As described above, since the subcarriers are modulated by FSK and BPSK, one bit is assigned to one symbol section of one subcarrier. After that, in the subcarrier modulation circuit 1612, the subcarriers are modulated by FSK and BPSK, and are inversely discrete Fourier transformed in the IFFT circuit 1613 and converted into a time signal, so that the frequency conversion circuit 1614 shifts to the target audio frequency band. It is converted and output to each speaker.

FIG. 3B shows an example of the circuit configuration of the input unit 130 of the information processing device 100 and the input unit 230 of the communication terminal 200. The input unit 130 of the information processing device 100 and the input unit 230 of the communication terminal 200 include a frequency conversion circuit 1621, an FFT circuit 1622, a demodulation circuit 1623, and a demapping circuit 1624. The sound collected by each microphone is converted into a predetermined frequency band by the frequency conversion circuit 1621 and returned to the data in the frequency domain discrete Fourier transformed by the FFT circuit 1622. After that, the demodulation circuit 1623 demodulates the subcarrier signal by the demodulation method corresponding to FSK and BPSK, and the demapping circuit 1624 restores the data in predetermined bit units allocated to each subcarrier and each symbol section. Is output to the control unit 120 of the information processing device 100 and the control unit 220 of the communication terminal 200.

Subsequently, the configuration of the point payment server 300 shown in FIG. 4 will be described. The point payment server 300 is a device installed at a location different from the store 999, for example, a general-purpose computer. When the point payment server 300 receives the user ID (membership number and password) and the store ID from the information processing device 100 via the network 9, the point payment server 300 executes a payment process (point payment process) related to the granting of points according to the payment amount. , The result of the point settlement process is transmitted to the information processing device 100 which is a settlement terminal. In this embodiment, the point payment server 300 gives points as an example, but in addition to this, data such as payment processing in product purchase by electronic money and distribution of coupons are described. It is applicable if it is a matter related to transmission and reception.

As shown in FIG. 4, the point settlement server 300 includes a storage unit 310, a control unit 320, a communication unit 330, and a system bus 97 that connects them to each other. It is assumed that the point payment server 300 has a function conventionally provided by the computer, and the description of the conventional function will be omitted.

The storage unit 310 functions as a main memory and a work memory for the control unit 320 to operate. The storage unit 310 is composed of, for example, a hard disk, a memory, or the like, and stores various information, fixed data, applications, screen data, an operation program executed by the control unit 320, and the like.

In addition, the storage unit 310 stores the payment processing program 311 for executing the processing related to the payment executed by the control unit 320. Further, the storage unit 310 stores a user table 312 that stores information (user ID, remaining number of points, etc.) of a user who uses the communication system 1 for payment processing. In addition, the storage unit 310 stores a store table 313 that stores information (store ID, etc.) of a store that uses the communication system 1 for payment processing. The user table 312 and the store table 313 may be stored at the time of registration for use of the communication system 1 (at the time of registration for the first use), respectively.

The control unit 320 is composed of, for example, a CPU or the like, and controls each unit of the point settlement server 300. The control unit 320 executes the processing related to the point payment by executing the payment processing program 311 stored in the storage unit 310.

The communication unit 330 is an interface capable of connecting to a communication network such as the Internet. The communication unit 330 communicates with the communication unit 160 of the information processing device 100 via the network 9 to transmit and receive necessary information.

The above is the configuration of the communication system 1. Subsequently, the overall operation of the communication system 1 will be described focusing on the operation of the information processing apparatus 100.

First, when the power is turned on to the information processing device 100, processing is started as shown in FIG. 5, and whether or not the distance between the information processing device 100 and the communication terminal 200 is within a predetermined distance, that is, , It is determined whether or not the detection unit 150 has detected that they are close to each other (step S101). If it is not detected by the detection unit 150 (step S101; No), the process of step S101 is repeated until it is detected.

On the other hand, when the detection unit 150 detects it (step S101; Yes), the control unit 120 executes the one-time key generation process by the function of the one-time key generation unit 121 (step S102). FIG. 6 is a flowchart showing an example of the one-time key generation process performed in step S102 of FIG. As shown in FIG. 6, the one-time key generation unit 121 of the control unit 120 first generates a one-time key (step S111). In the process of step S111, the one-time key may be generated by a general one-time key generation method such as generation based on the current time. It is assumed that the information processing device 100 and the communication terminal 200 are kept close to each other until the authentication process is completed.

After executing the process of step S111, the one-time key generation unit 121 converts (modulates) the generated one-time key into voice data by the output unit 140 and outputs it (step S112), and ends the one-time key generation process. do. By executing the process of step S112, the voice data of the one-time key is received by the nearby communication terminal 200. In the process of step S112, the volume is output at a volume determined in advance by an experiment or the like (that is, the minimum volume that can be transmitted and received by voice if it is within the range detected by the detection unit 150). In the process of step S112, the output volume of the one-time key may be adjusted and output so as to be different according to the distance between the information processing device 100 detected by the detection unit 150 and the communication terminal 200. For example, when the detection unit 150 detects that the distance is 2 cm, the output volume may be adjusted to be lower than that when the detection unit 150 detects that the distance is 7 cm. The output volume may be set in advance according to the separation distance.

By the process of step S112, the generated one-time key is modulated and transmitted as voice data. In this embodiment, the communication using voice as a medium is utilized, and FIG. 7 shows. As shown, transmission data is multiplexed and transmitted by using a plurality of modulation methods that are independent of each other and have different characteristics (user ID as transmission data, etc. (membership number) in the process of step S212 of FIG. 9 to be described later. The same applies when outputting audio (such as passwords and passwords). Since a plurality of modulation methods having different characteristics are used, it is possible to reduce the possibility that each data causes a transmission error at the same time. Examples of modulation methods independent of each other include FSK, PSK, and Amplitude-shift keying (ASK).

Hereinafter, a case where the subcarriers are modulated using FSK (first modulation method) and BPSK (second modulation method) will be described as an example. The combination of different modulation methods is not limited to the above combination, and for example, PSK and ASK may be used, or ASK and FSK may be used. Further, as PSK, a quadrature phase shift keying (QPSK), a differential quadrature phase shift keying (DQPSK), and a differential two phase shift keying (Differential Binary Phase Shift) are used. Keying: DBPSK) or the like may be used.

FSK is a modulation method for transmitting data by modulating the frequency of a subcarrier. Since the phase is not used for the modulation of the subcarrier, it is resistant to changes in the communication environment due to the movement of the communication terminal 200 or the like. However, since the subcarriers are modulated using the frequency, the frequency usage efficiency is low. FIG. 7A shows a specific example in which 1 and 0 of data are represented by using two channels (hereinafter, ch) in FSK combined with OFDM. It is 1 when ch1 is used and 0 when ch2 is used. In FSK, as shown in FIG. 7A, information for one bit per symbol section can be transmitted using two channels.

BPSK is a modulation method for transmitting data by modulating the phase of a subcarrier. Since the frequency is not used for the modulation of the subcarrier, the frequency usage efficiency is excellent, but unlike the FSK, it is vulnerable to changes in the communication environment due to the movement of the communication terminal 200 or the like. FIG. 7B shows a specific example in which data 1 and 0 are expressed using two types of phases in BPSK. The case where the subcarrier starts from the mountain is 1 and the case where the subcarrier starts from the valley is 0. In BPSK, as shown in FIG. 7B, one channel can transmit information for one bit per symbol section.

FIG. 7C shows an example in which information is carried on a subcarrier using FSK and different information is carried on the subcarrier using BPSK for transmission. In the first symbol section, since the subcarrier of ch1 starts from the mountain, the FSK data is 1 and the BPSK data is 1. In the second symbol section, since the subcarrier of ch2 starts from the mountain, the FSK data is 0 and the BPSK data is 1. In this way, different data can be carried on the subcarrier and transmitted using FSK and BPSK. As can be understood from FIG. 7C, when FSK and BPSK are used, data of 0.5 bit / ch per symbol section as FSK and 0.5 bit / ch per symbol section as BPSK can be transmitted. ..

Hereinafter, the process in which the output unit 140 modulates the subcarrier using the FSK and BPSK according to the one-time key as the transmission data will be specifically described. The same applies to the case where the user ID (membership number or password) as transmission data is output by voice in the process of step S212 of FIG. 9 to be described later. In this example, the case where the number of subcarriers is 126 will be described as an example.

Hereinafter, for ease of understanding, the bit strings of the transmitted data are set to B ₁ , B ₂ , ..., B _n , B ₁ ', B ₂ ', ..., B _n '(n is a natural number), and the subcarrier is C. _{Let 1} , C ₂ , ..., C ₁₂₆ . Subcarriers C ₁ , C ₂ , subcarriers C ₃ , C ₄ , ..., Subcarriers C ₁₂₅ , and C ₁₂₆ are paired, respectively, and are paired P ₁ , P ₂ , ... P _{63 in} that order. Here, it is assumed that the order of the bit strings is not changed in the data mapping.

Mapping circuit 1611, using FSK, the first symbol interval, the bit string _{B 1} pair _{P 1,} the bit string _{B 2} pair _{P 2,} ..., allocates the bit string _{B 63} sequentially paired _{P 63.} Then, the mapping circuit 1611, using FSK, allocated in the second symbol period, the bit string _{B 64} to the pair _{P 1,} the bit string _{B 65} into the pair _{P 2,} ..., a bit string _{B 126} sequentially paired _{P 63.}

Then, as described above, the subcarrier modulation circuit 1612 modulates each subcarrier using FSK and BPSK according to the data assigned to each subcarrier.

The output unit 140 transmits data using FSK by selecting one of the subcarriers for each _{pair P 1} , P ₂ , ..., P _63. Then, the output unit 140 transmits data using BPSK by modulating the phase of the selected subcarrier. The output unit 140 may transmit the same data using the FSK and the BPSK, or may transmit different data between the FSK and the BPSK.

As described above, since the communication method according to the present embodiment uses a plurality of modulation methods that are differently affected by changes in the communication environment, it is possible to prevent data communication errors from occurring and to stabilize communication. The sex can be improved. When the change in the communication environment is large, for example, when the movement of the communication terminal 200 is large, the data is demodulated by using the FSK-modulated portion of the collected audio signal, which is resistant to the change in the environment, and the data is demodulated to 0. It suffices if 5 bit / ch data can be stably received. On the other hand, when the change in the communication environment is small, 0.5 bit / ch data can be added per symbol section by additionally reading the BPSK-modulated part from the collected audio signal, so that the total is 1. Information of 1 bit / ch can be received per symbol section.

By the way, in order to perform multiplexing using different modulation methods, it is conceivable to adopt different modulation methods for different subcarriers. However, in this case, since it is necessary to use a large number of subcarriers, a wide frequency band is required. Further, since the transmission capacity of the output unit 140 is also limited, the energy per subcarrier becomes smaller as the number of subcarriers increases. In the communication method according to the present embodiment, since the subcarriers are modulated by using FSK and BPSK, the frequency usage efficiency can be improved and the energy efficiency used for transmission / reception of the subcarriers can be improved. As described above, the same applies to the case where the user ID or the like (membership number or password) as transmission data is output by voice in the process of step S212 of FIG. 9 described later. That is, although the information processing device 100 has been described here as an example, the same applies to the communication terminal 200.

As described above, the information processing apparatus 100 (similarly to the communication terminal 200) can transmit the same data twice by using two modulation methods. Furthermore, the data is transmitted by adopting the following method. If the communication speed is constantly reduced in accordance with a large change in the communication environment in order to ensure the stability of the communication, the communication time will be extended and the convenience of the user will be impaired.

Therefore, by devising the transmission order of the multiplexed data and transmitting it, the communication speed is increased or decreased according to the change of the environment. FIG. 8 shows an example of an image in which data is transmitted using FSK and BPSK. In the transmission image of FIG. 8, the transmission data (one-time key) transmitted by the information processing apparatus 100 is the first data D1, the second data D2, the third data D3, the fourth data D4, the fifth data D5, and the sixth data. It is composed of data D6.

The information processing apparatus 100 changes the transmission order of the data D1 to D6 depending on the modulation method used. Specifically, a series of data to be transmitted is divided into two (D1 to D3, D4 to D6) based on predefined information (rules), and the data modulated by BPSK is divided into two groups in the latter half. (D4 to D6) are transmitted first, and then the divided first half groups (D1 to D3) are transmitted. On the other hand, the data modulated by FSK transmits the data D1 to D6 without changing the order. For example, as shown in FIG. 8, in the first symbol section, the first data D1 is placed on the FSK and the fourth data D4 is placed on the BPSK. In the second symbol section, the second data D2 is placed on the FSK and the fifth data D5 is placed on the BPSK.

According to this configuration, when the communication state is normal, the receiving side can demodulate the data from either FSK or BPSK. Therefore, in the first half of the communication, the group (D1 to D3) is grouped by FSK and BPSK is used. When the groups (D4 to D6) are received, all the data can be received. Therefore, processing such as reception and demodulation in the latter half becomes unnecessary. Therefore, if the reception process can be completed earlier and the information can be restored from the plurality of modulation methods as a result, the communication speed can be increased.

In addition, even if part or all of the data cannot be demodulated from either FSK or BPSK due to burst noise or the like in the first half of communication, the group (D4 to D6) received as FSK in the second half of communication , Since the received data can be correctly restored from the groups (D1 to D3) received as BPSK, stable communication can be realized.

Further, through the first half and the second half of the communication, even if the data cannot be demodulated by the BPSK due to the change in the communication environment caused by the movement of the communication terminal 200 or the like, the data can be demodulated by the FSK, so that stable communication can be realized.

As described above, in the communication method according to the present embodiment, since data is transmitted using a plurality of modulation methods having different characteristics with respect to the movement of the communication terminal 200, etc., it responds to changes in the communication environment such as the movement of the communication terminal 200. It is possible to increase the communication speed and always realize stable communication. Here, the information processing device 100 has been described as an example, but the communication terminal 200 also has the same configuration as described above.

Returning to FIG. 5, when the process of step S102 is executed, the voice data of the one-time key is received by the communication terminal 200, and the process of the communication terminal 200 is started due to this. The voice data of the one-time key is received by the input unit 230 of the communication terminal 200 as described above, but the input unit 230 is set in advance in a receivable state (a state in which voice data can be received). It is assumed that Further, the audio data received by the input unit 230 is demodulated by the input unit 230 to become bit string data.

Here, the demodulation process executed by the communication terminal 200 will be described. The communication terminal 200 receives the same information twice from the signal modulated by using FSK and BPSK, and executes the demodulation process in consideration of the quality of the received data when demodulating the signal. The same applies to the case where the process of step S201 of FIG. 5 to be described later is performed and the transmission data is received by the input unit 130 of the information processing apparatus 100.

Specifically, the input unit 230 of the communication terminal 200 receives the audio signal modulated by FSK and BPSK, and the FSK-modulated portion and the BPSK-modulated portion of the audio signal are displayed. Demodulate each. Then, the input unit 230 determines whether or not the data obtained by demodulating the portion of the audio signal modulated by FSK by FSK and the data obtained by demodulating the portion modulated by BPSK by BPSK satisfy predetermined qualities. .. Whether or not the demodulated data satisfies the predetermined quality is determined by, for example, the presence or absence of defects in the data determined by using an error detection code such as CRC, the S / N ratio (Signal-Noise Ratio) or the strength of the received signal, and the like. Is determined based on whether or not is equal to or greater than a predetermined value.

Then, the audio signal is converted into the received data by using the data determined to satisfy the predetermined quality. After that, the input unit 230 executes subsequent processing such as demodulation of the subcarrier and demapping. Although the communication terminal 200 has been described as an example here, the information processing device 100 also has the same configuration as described above.

As described above, in the case where the communication system 1 has the above configuration, it is not possible to accurately demodulate a part or all of the data from the audio signal modulated by one of the modulation methods due to a transmission error or the like. Also, the received data can be demodulated using the audio signal modulated using the other modulation method.

Returning to FIG. 5, when the processing of the communication terminal 200 is started, the communication terminal 200 executes the transmission data generation processing by the function of the transmission data generation unit 221 (step S201), and then the communication terminal 200 ends the processing. FIG. 9 is a flowchart showing an example of the transmission data generation process performed in step S201 of FIG. As shown in FIG. 9, the transmission data generation unit 221 of the control unit 220 first receives information to be transmitted such as a member number and a password stored in the storage unit 210 from the information processing device 100 in one time. Transmission data is generated by adding key audio data (demodited bit string data) (step S211).

After executing the process of step S211, the transmission data generation unit 221 converts the generated transmission data into voice data by the output unit 240 and outputs it (step S212), and ends the transmission data generation process. As described above, also in the process of step S212, the transmission data is multiplexed and transmitted by using a plurality of modulation methods as in the process of step S112. By executing the process of step S212, the transmitted data is received and demodulated by the adjacent information processing device 100 (the demodulation process is the same as that of the communication terminal 200). As described above, the output volume in the process of step S212 may be the minimum volume that can be transmitted and received by voice as long as it is within the range detected by the detection unit 150 of the information processing apparatus 100. Specifically, in the process of step S212, the volume may be output at the same volume as the volume received by the input unit 230 of the communication terminal 200.

As described above, by the process of step S112 of FIG. 6 and the process of step S212 of FIG. 9, each voice is transmitted at the minimum volume that can be transmitted and received by voice within the range detected by the detection unit 150. It is output. Therefore, for example, it is possible to prevent the one-time key from being received by a communication terminal (a communication terminal that is not the target) that is close to the communication terminal 200 but is not detected by the detection unit 150 of the information processing device 100. Can be done. Further, when the output volume of the communication terminal of the non-target communication terminal is high, the information processing device 100 receives the voice output by the non-target communication terminal. In this case, Since the one-time key is different (because the non-target communication terminal uses another one-time key), the authentication will not succeed. Therefore, fraud can be suitably prevented.

Returning to FIG. 5, when the process of step S201 is executed, the transmission data is received by the input unit 130 of the information processing device 100, and the information processing device 100 performs the authentication process due to this (step S103). .. The transmission data received by the input unit 130 is demodulated by the input unit 130 as described above to become bit string data.

FIG. 10 is a flowchart showing an example of the authentication process performed in step S103 of FIG. As shown in FIG. 10, the authentication processing unit 122 of the control unit 120 first determines whether or not the one-time key generated by the one-time key generation unit 121 and the one-time key included in the transmission data match. Is determined (step S131). Specifically, in the process of step S131, first, the one-time key included in the transmission data that has been demodulated into bit string data is extracted. Then, it is determined whether or not the extracted one-time key and the one-time key generated by the one-time key generation unit 121 match. As described above, since the one-time key generated by the one-time key generation unit 121 is stored in the storage unit 110 together with the expiration date, the expiration date of the one-time key stored in the storage unit 110 If is cut off, the process of step S134, which will be described later, may be executed without executing the process of step S131. That is, first, the expiration date of the one-time key of the storage unit 110 may be confirmed, and the process of step S131 may be executed only when the expiration date is within the expiration date. The one-time key whose expiration date has passed may be deleted from the storage unit 110 when the expiration date has passed.

When it is determined in step S131 that the one-time keys match (step S131; Yes), the authentication processing unit 122 determines that the authentication was successful (step S132). Specifically, in the process of step S132, the authentication result may be notified to the communication terminal 200, such as outputting a voice indicating that the authentication has been successful. As described above, the subsequent processing may be executed. After executing the process of step S132, the authentication processing unit 122 deletes the one-time key stored in the storage unit 110 (step S133), and then ends the authentication process. On the other hand, when it is determined that the one-time keys do not match (including the case where the one-time key is not stored in the storage unit 120 or the expiration date has expired) (step S131; No), the authentication processing unit 122 performs authentication. It is determined that the failure has occurred (step S134), and the authentication process is terminated. Specifically, in the process of step S134, the authentication result may be notified to the communication terminal 200, such as outputting a voice indicating that the authentication has failed.

After returning to FIG. 5 and executing the process of step S103, the control unit 120 determines whether or not the authentication was successful by the function of the authentication processing unit 122 (step S104). If the authentication fails (step S104; No), the information processing apparatus 100 ends the process as it is.

On the other hand, if the authentication is successful (step S104; Yes), the control unit 120 transmits a telegram requesting execution of the payment process to the point payment server 300 (step S105). Specifically, in the process of step S105, the telegram requesting the settlement process via the communication unit 160 is sent to the user ID (member number and password) for performing the point settlement process, the store ID of the requester, and the settlement amount. At the same time, it is transmitted to the communication unit 330 of the point payment server 300. When the telegram is transmitted to the point settlement server 300, the processing of the point settlement server 300 is started due to this.

When the process of the point settlement server 300 is started, the point settlement server 300 executes the point settlement process, transmits the execution result to the information processing apparatus 100 (step S301), and ends the process. In the point payment process of step S301, first, the user table 312 and whether or not the user ID (membership number and password) and the store ID received from the information processing device 100 are valid are stored in the storage unit 310, respectively. Authenticate by comparing with store table 313. Then, when the authentication is successful, points are given according to the amount indicated by the received payment amount. Specifically, the number of points corresponding to the settlement amount is added to the remaining number of points in the user table 312. Then, the user ID and the remaining number of points (point processing result) are transmitted to the information processing device 100. If the authentication fails, information indicating that the authentication has failed may be transmitted as a point processing result.

Subsequently, when the information processing apparatus 100 receives a point processing result from the point settlement server 300, the information processing apparatus 100 performs a point display process of displaying the process result on a monitor included in the output unit 240 (step S106), and ends the process.

The above is the operation centered on the information processing device 100 in the communication system 1. As described above, the information processing apparatus 100 according to the present embodiment generates a one-time key that is valid only for one authentication and outputs the voice. Then, the transmission data from the communication terminal 200 is input by voice, and the validity of the communication terminal 200 is determined by whether or not the one-time key included in the transmission data matches the one-time key generated and output immediately before. .. That is, the one-time key included in the transmission information received from the communication terminal 200 is authenticated only when it matches the one-time key at the time of generation. Therefore, it is possible to prevent fraud such as being played back after being recorded. Therefore, it is possible to improve the security in authentication using voice as a transmission medium and prevent fraud. Further, the information processing apparatus 100 according to the present embodiment utilizes the fact that the communication is performed using voice as a medium, and as shown in FIG. 7, by using a plurality of modulation methods having different characteristics independent of each other. , The transmission data is multiplexed and transmitted. Since a plurality of modulation methods having different characteristics are used, it is possible to reduce the possibility that each data causes a transmission error at the same time. That is, since a plurality of modulation methods that are differently affected by changes in the communication environment are used, it is possible to prevent data communication errors from occurring and improve communication stability.

Further, when the detection unit 150 of the information processing device 100 detects that the distance between the information processing device 100 and the communication terminal 200 is within a predetermined distance (for example, 7 cm), the one-time key is output by voice. .. Therefore, the output volume of the one-time key can be set to a volume that can be received by the nearby communication terminal 200, and it is possible to prevent recording by another person.

(Modification example)
The present invention is not limited to the above-described embodiment, and various modifications and applications are possible. It does not have to have all the technical features shown in the above-described embodiment, but includes a part of the configurations described in the above-described embodiment so as to solve at least one problem in the prior art. There may be. In addition, the configurations shown in the following modifications may be combined.

In the above embodiment, the function of the information processing device 100 is built in the payment terminal of the store 999 (that is, the information processing device 100 is the payment terminal), but this is an example. The function of the information processing device 100 does not have to be built in the payment terminal of the store 999. For example, as shown in FIG. 11, it is built in the relay device that relays between the communication terminal 200 and the payment terminal 900. May be good. That is, the information processing device 100 may be a relay device that relays between the communication terminal 200 and the payment terminal 900. The relay device may have a size suitable for performing voice communication with the communication terminal 200 in close proximity.

In this case, in the process of step S105 shown in FIG. 5, the information processing device 100 may transmit a message requesting the settlement terminal 900 to execute the settlement process, and the other processes are performed in the same manner as in the above embodiment. Just do it. In the process of step S105, a telegram requesting the settlement process via the communication unit 160 may be transmitted to the settlement terminal 900 together with the user ID (membership number and password) for performing the point settlement process. At this time, unlike the above embodiment, the communication unit 160 does not transmit via a dedicated line, but BLE (Bluetooth Low Energy), which is a Bluetooth (registered trademark) standard established for the purpose of low power consumption. ) May be sent. Then, the payment terminal 900 adds the store ID to the received information and transmits it to the communication unit 330 of the point payment server 300, and the payment terminal 900 displays the execution result of the point payment process received from the point payment server 300. Just do it.

Here, it is difficult to perform voice communication by bringing the speaker of the communication terminal 200 close to the microphone of the information processing device 100 which is a store terminal, depending on the size of the store terminal, the position of the microphone, and the like. In many cases, the store terminal is installed in advance, and it costs a lot to add a new function of the information processing device 100. Therefore, since the relay device has the function of the information processing device 100, it is possible to avoid the difficulty of performing voice communication in close proximity to the microphone of the information processing device 100, which is a store terminal, and stable voice. Can communicate.

Further, the information processing device 100 as a relay device may receive the execution result of the point payment process received by the payment terminal 900 from the point payment server 300 by BLE from the payment terminal 900 (also for wired communication). You may receive it). Then, the information processing apparatus 100 may modulate the received execution result of the point settlement process using the plurality of modulation methods described in the above embodiment and transmit it to the communication terminal 200 by voice. Then, the communication terminal 200 may display the received execution result on the output unit 240 of the communication terminal 200.

The user of the communication terminal 200 can access the point payment server 300 via the network of the communication terminal 200, and can refer to the execution result of the point payment process by accessing the point payment server 300. However, the network environment of the communication terminal 200 is unstable depending on the situation. Therefore, by transmitting the execution result of the point payment process to the communication terminal 200 by voice in this way, the user is surely recognized the execution result of the point payment process regardless of the network environment. be able to.

Further, the information processing device 100 as a relay device may enable detection by the detection unit 150 by receiving a control command transmitted from the payment terminal 900, for example. Specifically, on the payment terminal 900 side, a control command that enables detection of the detection unit 150 of the information processing device 100 may be transmitted based on an operation by an operator (clerk or the like) of the payment terminal 900. Then, on the side of the information processing device 100, the detection by the detection unit 150 is enabled based on the reception of the control command, and the user of the communication terminal 200 is notified that the detection by the detection unit 150 is valid. do it. The notification may be performed, for example, by voice notification or by turning on an LED (Light Emitting Diode) provided in the relay device.

According to this, it is possible to prevent unnecessary detection from being performed on the side of the information processing device 100, and it is possible to notify the user of the communication terminal 200 that the information processing terminal 200 should be brought close to the user, so that a suitable point payment process can be performed. It can be carried out.

In the above embodiment, in the transmission data generation process, the transmission data generation unit 221 of the communication terminal 200 adds (adds in a demodulated state) the received one-time key voice data to generate transmission data. As shown, this is just an example. For example, in the process of step S211 of FIG. 9, the transmission data generation unit 221 simply adds (adds in a demodulated state) the received one-time key voice data to the information to be transmitted such as the membership number and password. Instead, the information to be transmitted may be encrypted with a received and demodulated one-time key. In addition to encryption, information to be transmitted may be calculated using a received and demodulated one-time key (for example, adding a one-time key). Then, the encrypted or calculated information may be used as transmission data. In this case, for example, the information to be transmitted is squared and the remainder divided by 5 is added to the information to be transmitted. A predetermined hash function may be applied to the transmission data, and the result (hash value) may be added to the transmission data.

Then, in the process of step S212 of FIG. 9, the generated transmission data and hash value may be converted into voice data by the output unit 240 and output to the information processing apparatus 100. On the side of the information processing device 100, in the authentication process of FIG. 10, before the process of step S131, the transmission data received from the communication terminal 200 and the voice data of the hash value are demolished into bit string data, and the transmission data is one-time. Decrypt with the one-time key generated by the key generation unit 121 (return to the state before the calculation). Then, in the process of step S132, a predetermined hash function may be applied to the decoded transmission data, and it may be determined whether or not the result (hash value) matches the received hash value. The process when the one-time key has expired is the same as that of the above embodiment. Then, if the hash values match, it may be determined that the authentication was successful, and if they do not match (similar to the above embodiment), it may be determined that the authentication has failed. It is assumed that a common hash function is stored in advance in the respective storage units of the information processing device 100 and the communication terminal 200. According to this, since the one-time key and the hash value are not authenticated unless they are valid, it is possible to improve security and prevent fraud more than simply adding the one-time key.

Further, whether to only add a one-time key to the information to be transmitted or to encrypt or calculate the information to be transmitted with the one-time key depends on, for example, the distance between the information processing device 100 and the communication terminal 200. It may be selectable according to the situation. Specifically, when the distance between the information processing device 100 and the communication terminal 200 is less than a predetermined distance, only the one-time key is added to the information to be transmitted, and the distance is equal to or larger than the predetermined distance. If this is the case, the information to be transmitted may be encrypted or calculated with a one-time key. According to this, since suitable security can be ensured according to the distance, fraud can be prevented while reducing the processing load.

Further, in the above modified example, an example in which the information to be transmitted is encrypted or calculated with a one-time key is shown, but in addition to this, the information to be transmitted is stored as a one-time key and a secret unique to each communication terminal. It may be encrypted or calculated using a key. Specifically, the communication terminal 200 receives in advance the identification information that identifies the communication terminal 200 and the private key corresponding to the identification information from an encryption server that can communicate with each other via the network (temporarily received). After that, communication between the communication terminal 200 and the server is unnecessary). Then, in the transmission data generation process of FIG. 9, the information to be transmitted such as the membership number and the password is the one-time key (restored state) received from the information processing device 100 and the private key received from the encryption server. , Can be used for encryption or calculation to generate transmission data. In this case, the hash value may be added to the transmission data and the identification information received from the server may be added to the transmission data as in the above modification. That is, in the process of step S212 of FIG. 9, the output unit 240 may convert (modulate) the generated transmission data, hash value, and identification information into voice data and output it to the information processing device 100.

On the side of the information processing apparatus 100, in the authentication process of FIG. 10, before the process of step S131, the transmission data, the hash value, and the identification information received from the communication terminal 200 are demolished into bit string data, and the transmission data is set to one. Decryption is performed using the one-time key generated by the time key generation unit 121 and the private key (returns to the state before the calculation). Then, in the process of step S132, a predetermined hash function may be applied to the decoded transmission data, and it may be determined whether or not the result (hash value) matches the received hash value. The private key is stored in advance in the storage unit 110 of the information processing device 100 in association with the identification information of the communication terminal 200, and the private key can be specified from the storage unit 110 based on the received identification information. good. Further, for example, the private key may be calculated by calculating according to a predetermined rule based on the identification information. Subsequent processing is the same as the above modification. According to this, security can be further improved.

In addition to this, for example, on the communication terminal 200 side, the identification information may be encrypted or calculated with the one-time key, and the information to be transmitted may be encrypted or calculated with the one-time key and the private key. good. Then, on the side of the information processing apparatus 100, the identification information is first decrypted with the one-time key, and the private key is acquired based on the identification information. Then, the transmitted data may be decrypted using the acquired private key and the one-time key. According to this, security can be further improved.

Further, in the above embodiment, as shown in FIG. 1, an example in which the information processing apparatus 100 includes one output unit 140 is shown, but this is an example. The information processing device 100 may include a plurality of output units 140, and in this case, the output units 140 may be provided at different positions and at positions where the sound is evenly distributed around the information processing device 100. According to this, it is possible to output sound at a more suitable output volume.

For example, even if the distance between the information processing device 100 and the communication terminal 200 is the distance detected by the detection unit 150, the distance between the input unit 230 of the communication terminal 200 and the output unit 140 of the information processing device 100 is large. It may have been done. In such a case, if the output volume of the information processing device 100 is low, there is a possibility that the communication terminal 200 may not be able to receive voice accurately. On the other hand, if the output volume is increased, it may be received by a communication terminal other than the target. Therefore, by providing the output units 140 at positions where the voice is evenly distributed around, the distance between the input unit 230 of the communication terminal 200 and the output unit 140 of the information processing device 100 becomes substantially constant, and the voice is produced at a suitable output volume. Can be output.

Further, the information processing device 100 may include a plurality of detection units 150 corresponding to the plurality of output units 140. Then, among the plurality of detection units 150, the voice output may be performed only from the output unit 140 corresponding to the detection unit 150 that has detected that the communication terminal 200 is in close proximity. According to this, it is possible to prevent the output from the unnecessary output unit 140, output the voice with a suitable output voice, and further improve the security.

Further, in the above embodiment, in the process of step S112 of FIG. 6, the minimum volume capable of transmitting and receiving by voice within the range detected by the detection unit 150 (that is, within the range detected by the detection unit 150) is determined in advance by an experiment or the like. An example of outputting a one-time key with volume) is shown, but this is just an example. As described above, the volume output in step S112 does not have to be a constant volume, and may be, for example, a volume in consideration of ambient noise and the like. Specifically, when the volume of ambient noise is high, it is necessary to increase the volume so that the voice communication between the information processing device 100 and the communication terminal 200 does not fail. However, since the volume of ambient noise changes with the passage of time, if the volume of ambient noise decreases and the output volume remains high, security deteriorates. Therefore, it is necessary to change the output volume according to the volume of ambient noise.

In this example, during the period in which the one-time key is output as voice in step S112 of FIG. 6, the volume of ambient noise is measured by the input unit 130 of the information processing device 100, and the output volume is set according to the volume of the noise. You just have to adjust. Specifically, the measured noise volume may be divided into a plurality of stages and output at an output volume corresponding to the stage. Similarly, for the voice output of the communication terminal 200 in step S212 of FIG. 9, the volume of ambient noise may be measured and the output volume may be adjusted. According to this, it is possible to output at an appropriate volume according to the surrounding situation, and it is possible to prevent deterioration of security. When measuring the volume of ambient noise, it is not necessary to measure the volume of noise in the frequency band generally used for voice communication and not to measure the noise in the unused frequency band.

Further, for example, as in the above modification, a plurality of output units 140 (similar to the detection unit 150) are provided around the information processing device 100, and a plurality of input units 130 are provided correspondingly, and a one-time key is provided. The user may be notified to move the communication terminal 200 to the position where the volume of ambient noise is the lowest before the output of. For example, the volume of ambient noise is measured by each of the plurality of input units 130 provided around the information processing device 100, and the input unit 130 determined to have the lowest noise volume among the plurality of input units 130. A notification sound may be output from the corresponding output unit 140, and the user may be urged to move the communication terminal 200 to the position of the output unit 140. Then, based on the detection by the corresponding detection unit 150, the one-time key audio output may be performed. According to this, it is possible to reduce the influence of noise and improve security.

Further, in the above embodiment, the output unit 140 and the output unit 240 convert (modulate) the data (bit string data) to be transmitted into audio data, and demodulate the audio data received by the input unit 130 and the input unit 230. Although an example is shown in which the bit string data is used, these may be performed by the control unit 120 and the control unit 220, respectively.

Further, in the above embodiment, for example, by using FSK and BPSK carrying the same data, the transmission data is doubly multiplexed and transmitted, but as shown in FIG. 12, the frequencies are further different. By transmitting the same data in the band, the transmission data may be quadrupled and transmitted.

First, frequency band multiplexing will be described. The communication terminal 200 has two bands of 15.9 kHz to 17.9 kHz (first voice frequency band) and 17.9 kHz to 19.9 kHz (second voice frequency band) for communication using voice as a medium. use. The above band takes into consideration the frequency characteristics of speakers installed as standard in smartphones and the like.

At the time of transmission, the communication terminal 200 transmits the same data in two bands of 15.9 kHz to 17.9 kHz, which is a low band, and 17.9 kHz to 19.9 kHz, which is a high band. That is, a signal of 15.9 kHz to 17.9 kHz and a signal of 17.9 kHz to 19.9 kHz are modulated by the transmitted data, respectively.

Specifically, the frequency conversion circuit 1614 shown in FIG. 3 converts the output of the IFFT circuit 1613 into a low band and a high band, and transmits the same data in the low band and the high band. From the speaker of the output unit 140, an audio signal in the band of 15.9 kHz to 17.9 kHz (first audio signal) and an audio signal in the band of 17.9 kHz to 19.9 kHz (second audio signal) are output. NS.

As described above, the communication terminal 200 transmits the same data twice using the two frequency bands, and further transmits the data by adopting the following method. FIG. 12 shows an example in which data is transmitted by simultaneously performing data multiplexing by using two frequency bands and data multiplexing by using two modulation methods. In FIG. 12, for example, D1 (D2) indicates that the data transmitted by FSK is D1 and the data transmitted by BPSK is D2.

For example, the communication terminal 200 divides the transmission data into the first data D1, the second data D2, the third data D3, and the fourth data D4 and transmits the transmission data. The communication terminal 200 changes the transmission order of the data D1 to D4 depending on the frequency band used and the modulation method. Specifically, based on the information defined in the transmission order definition information, the low-band FSK transmits data in the order of D1, D3, D4, D2, and the low-band BPSK transmits data in the order of D2, D4, D3, Data is transmitted in the order of D1. Further, in the high band FSK, data is transmitted in the order of D4, D2, D1 and D3, and in the high band BPSK, data is transmitted in the order of D3, D1, D2 and D4. In other words, different data is transmitted at the same timing for each frequency band and modulation method.

According to this configuration, if the communication state is normal, the receiving side can receive all the data by receiving D1 and D2 in the low band and D3 and D4 in the high band in the first symbol section. Reception / demodulation after the 2 symbol section is unnecessary.

Further, for example, even when the data modulated by BPSK cannot be demodulated due to the movement of the communication terminal 200, the portion where the audio signal is modulated by FSK is D1 in the low band and D4 in the high band in the first symbol section. By receiving D3 in the low band and D2 in the high band in the second symbol section, all the data can be received, so that reception / demodulation after the third symbol section is unnecessary.

Further, even if there is frequency interference throughout the communication and transmission in either the low band or the high band becomes impossible, the received data can be correctly restored only in the one band that can be transmitted normally. For example, assuming that the low band can be transmitted normally, D1 is received by FSK and D2 is received by BPSK in the first symbol section, D3 is received by FSK and D4 is received by BPSK in the second symbol section, and all data can be received. Reception / demodulation after the 3 symbol section becomes unnecessary.

Then, even if there is frequency interference throughout the communication and the data modulated by BPSK cannot be demodulated due to the movement of the communication terminal 200, the data correctly received from the FSK only in one of the bands that can be transmitted normally. Can be restored. For example, assuming that the low band can be transmitted normally, data can be received in the order of D1, D3, D4, and D2 using FSK.

In this modification, the communication terminal 200 has been described as an example, but the information processing apparatus 100 also has the same configuration.

Next, the demodulation process executed by the communication terminal 200 will be described. The communication terminal 200 quadruples receives the same information from signals modulated using different frequency bands and different modulation methods, but when demodulating the signal, the demodulation process is executed in consideration of the quality of the received data. do.

Specifically, the input unit 230 of the communication terminal 200 receives an audio signal and demodulates the subcarrier, and demodulates the data obtained by demodulating the portion of the signal modulated by FSK and the portion modulated by BPSK. It is determined whether or not each of the obtained data satisfies a predetermined quality. Further, the input unit 230 of the communication terminal 200 determines whether or not the data obtained by demodulating the high-band audio signal and the data obtained by demodulating the low-band audio signal satisfy predetermined qualities.

Then, the input unit 230 of the communication terminal 200 converts the audio signal into the received data by using the data determined to satisfy the predetermined quality. After that, the control unit 220 controls the input unit 230 to execute subsequent processing such as demapping. The order of quality determination and demapping of the demodulated data is not limited to the above processing, and quality determination may be performed after demapping.

Here, the communication terminal 200 has been described as an example, but the information processing device 100 also has a similar configuration.

As described above, according to this modification, even if part or all of the data cannot be accurately received in one band due to a decrease in reception intensity due to frequency interference, the other band Data can be demodulated using audio signals. Further, when the communication terminal 200 does not move and there is no frequency interference, both bands can be used to demodulate the data. Therefore, it is possible to further increase the speed of communication using voice as a medium in response to changes in the communication environment.

In this modified example, when there is no movement of the communication terminal 200 and there is no frequency interference, the data is demodulated using the sound of the first symbol (first sound). Not limited to this. For example, when the sound of the first symbol is greatly destroyed by impulse noise or the like, all the data may be received using the symbols included in the second and subsequent sounds.

More specifically, before performing other signal processing, it is detected from the received signal strength whether or not the received so-called raw data contains impulse noise. For example, the received signal after A / D (analog / digital) conversion is temporarily stored and analyzed. When impulse noise is detected, the time zone in which the impulse noise exists is specified. For example, when impulse noise is present in the first sound, the first sound is ignored and it is determined whether or not the analysis of the second sound is possible. With such a configuration, high noise immunity can be realized.

Further, in the above embodiment, the information is transmitted only once for each modulation method and frequency band, but the present invention is not limited to this. The same information may be transmitted twice or more in each modulation method and each frequency band. In this case, for example, after the first data is transmitted, the second data may be transmitted after a predetermined time.

Alternatively, if the receiving side demodulates the first data and determines that the first transmission data can be received accurately, or if the data can be received only in the first half of the signal, the receiving side notifies the transmitting side to that effect. However, in this case, the transmitting side may not transmit the data for the second time or the data in the latter half. In this case, the transmitting side does not need to transmit the same data twice.

Alternatively, before performing the demodulation processing, if the received signal strength at the time of receiving the first data is equal to or higher than a predetermined value, the receiving side determines that the data has been correctly received and notifies the transmitting side to that effect. You may. Alternatively, if it is determined that the data has been correctly received, the demodulation process or the like may not be performed on the data received for the second time without notifying the transmitting side to that effect.

In the above embodiment, the same data is transmitted in duplicate using different modulation methods, but the present invention is not limited to this. For example, the first data may be transmitted using the first modulation method, and the second data different from the first data may be transmitted using the second modulation method.

The communication terminal 200 according to the above embodiment can also be applied to other devices including, for example, a speaker and a microphone. For example, it is a portable music device such as an MP3 player, an IC (Integrated Circuit) recorder, and a wearable terminal such as a wristwatch (however, all of them must be equipped with a speaker and a microphone). Further, an acoustic public address system other than the speaker may be used to output the sound, or a sound collecting device other than the microphone may be used to input the sound.

Further, in the above embodiment, the example in which the voice used as the carrier is the voice in the non-audible band has been described, but the voice in the audible band may be used as the carrier. By using the voice in the audible band as a carrier, the user can confirm the timing at which the data is transmitted, so that the communication terminal 200 can be consciously stopped with respect to the payment terminal 900.

In the above embodiment, when the communication terminal 200 demodulates a signal, the communication terminal 200 determines whether or not the data modulated using a different modulation method and a different frequency band satisfies a predetermined quality, and the data satisfies the predetermined quality. Although the signal was converted into received data using only, the present invention is not limited to this. For example, the reliability of communication is evaluated based on the strength of the received signal, the presence or absence of data defects, etc., and the demodulation process is performed by placing a specific weight on the audio signal received in the modulation method and frequency band with the higher communication reliability. You may do it. The demodulation process may be performed by weighting based on the reliability of communication and calculating a weighted average of the weighted data.

In the above embodiment, the data modulated by BPSK transmits the second half group (D4 to D6) divided into two first, then transmits the first half group (D1 to D3) divided into two, and modulates with FSK. The data transmitted the data D1 to D6 without changing the order, but the present invention is not limited to this. The data modulated by BPSK transmits data D1 to D6 without changing the order, and the data modulated by FSK transmits the second half group (D4 to D6) divided into two first, and then the first half divided. Groups (D1 to D3) may be transmitted.

In the above embodiment, BPSK is used as the PSK, but the present invention is not limited to this. For example, QPSK, DQPSK, and DBPSK may be used as the PSK. For example, in DQPSK, four waves that are out of phase in four stages are used, and different values are assigned to each difference from the immediately preceding wave. Therefore, in DQPSK, information of four values (2 bits) can be represented in one symbol section of one subcarrier.

When DQPSK is used as the PSK, the FSK has two values in one symbol section and the DQPSK has four values in one symbol section, so that a combination of modulation methods having different transmission speeds is used. Taking advantage of this, the data modulated by DQPSK may be divided into the first half and the second half, and if the data in the first half modulated by DQPSK can be accurately received, the subsequent reception / demodulation may be stopped.

In addition, when the above-mentioned functions are realized by sharing the OS (Operating System) and the application, or by cooperating with the OS and the application, only the part other than the OS may be stored in the medium.

It is also possible to superimpose a program on a carrier wave and distribute it via a communication network. For example, the program may be posted on a bulletin board system (BBS, Bulletin Board System) on a communication network, and the program may be distributed via the network. Then, by starting these programs and executing them in the same manner as other application programs under the control of the operating system, the above-mentioned processing may be executed.

1 Communication system 9 Network 97, 98, 99 System bus 100 Information processing device 110 Storage unit 111 Program 120 Control unit 121 One-time key generation unit 122 Authentication processing unit 130 Input unit 140 Output unit 150 Detection unit 160 Communication unit 200 Communication terminal 210 Storage unit 211 Program 220 Control unit 221 Transmission data generation unit 230 Input unit 240 Output unit 300 point Payment server 310 Storage unit 311 Payment processing program 312 User table 313 Store table 320 Control unit 330 Communication unit 900 Payment terminal 999 Store 1611 Mapping circuit 1612 Subcarrier modulation circuit 1613 IFFT circuit 1614, 1621 Frequency conversion circuit 1622 FFT circuit 1623 Demodition circuit 1624 Demapping circuit

Claims (5)

A store terminal installed in a store, a communication system including a communication terminal owned by the user, and a communicatively a server connected to each other via a network before Symbol shop terminal,
The store terminal is
An authentication information generation means that generates authentication information that can be used only for one-time authentication when the user detects that they are close to each other.
An authentication information transmitting means for transmitting the authentication information generated by the authentication information generating means to the communication terminal by voice, and an authentication information transmitting means.
A receiving means for receiving transmission information, which is information to be transmitted from the communication terminal, by voice, and
The demodulation information transmitting means for demodulating the transmission information received by the receiving means and transmitting the transmission information to the server via the network is provided.
The communication terminal is
An authentication information receiving means for receiving the authentication information by voice from the store terminal,
The transmission information includes a transmission means including the authentication information received by the authentication information receiving means and transmitted by voice to the store terminal.
The server
A demodulated information receiving means for receiving the demodulated transmission information from the store terminal, and
A payment processing means that performs payment processing based on the transmission information received by the demodulation information receiving means, and
The payment result transmission means for transmitting the payment result in the payment processing means to the store terminal via the network is provided.
The store terminal further includes a payment result reception display means for receiving and displaying the payment result from the server.
A communication system characterized by that. A communication terminal owned by a user, a store terminal installed in a store, a relay terminal that relays communication between the communication terminal and the store terminal, and the store terminal are connected to each other via a network so as to be able to communicate with each other. A communication system that includes a server
The communication terminal includes a transmission means for transmitting transmission information, which is information to be transmitted, to the relay terminal by voice.
The relay terminal is
A receiving means for receiving transmission information by voice from the communication terminal, and
A demodulated information transmitting means that demodulates the transmitted information received by the receiving means and transmits it to the store terminal by short-range wireless communication is provided.
The store terminal is
A demodulated information receiving means for receiving the demodulated transmission information, and
A transmission information transmitting means for transmitting transmission information received by the demodulation information receiving means to the server via the network is provided.
The server
A transmission information receiving means for receiving the transmission information from the store terminal, and
A payment processing means that performs payment processing based on the transmission information received by the transmission information receiving means, and
A payment result transmission means for transmitting the payment result in the payment processing means to the store terminal via the network is provided.
The store terminal,
A payment result reception display means for receiving and displaying the payment result from the server ,
The payment result and reception display unit radio transmitting means for transmitting the payment result received to the relay terminal by short-range wireless communication, further example Bei a,
The relay terminal further includes a voice transmission means that receives the payment result from the store terminal and transmits the payment result by voice to the communication terminal.
The communication terminal is
A voice receiving means for receiving the payment result by voice from the relay terminal,
A demodulation display means for demodulating and displaying the payment result received by the voice receiving means is further provided.
A communication system characterized by that. A communication terminal owned by a user, a store terminal installed in a store, a relay terminal that relays communication between the communication terminal and the store terminal, and the store terminal are connected to each other via a network so as to be able to communicate with each other. A communication system that includes a server
The communication terminal includes a transmission means for transmitting transmission information, which is information to be transmitted, to the relay terminal by voice.
The relay terminal is
A receiving means for receiving transmission information by voice from the communication terminal, and
A demodulated information transmitting means that demodulates the transmitted information received by the receiving means and transmits it to the store terminal by short-range wireless communication is provided.
The store terminal is
A demodulated information receiving means for receiving the demodulated transmission information, and
A transmission information transmitting means for transmitting transmission information received by the demodulation information receiving means to the server via the network is provided.
The server
A transmission information receiving means for receiving the transmission information from the store terminal, and
A payment processing means that performs payment processing based on the transmission information received by the transmission information receiving means, and
A payment result transmission means for transmitting the payment result in the payment processing means to the store terminal via the network is provided.
The store terminal,
A payment result reception display means for receiving and displaying the payment result from the server ,
A control signal transmitting means for transmitting a control signal based on the operation by the user to validate the function of the receiving means by the relay terminal, further example Bei a,
The relay terminal further includes a notification means for notifying that the function of the receiving means has been activated when the control signal transmitted from the store terminal is received.
A communication system characterized by that. A store terminal installed in a store, a communication terminal and, before Symbol store communication method by a communication system including a server communicatively connected to each other via a network to a terminal, the owned by the user,
The store terminal
An authentication information generation step that generates authentication information that can be used only for one authentication when the user detects that they are close to each other.
An authentication information transmission step of transmitting the authentication information generated in the authentication information generation step to the communication terminal by voice, and an authentication information transmission step.
A reception step of receiving transmission information, which is information to be transmitted from the communication terminal, by voice, and
The demodulation information transmission step of demodulating the transmission information received in the reception step and transmitting it to the server via the network is executed.
The communication terminal
An authentication information receiving step of receiving the authentication information by voice from the store terminal, and
The transmission step of including the authentication information received by the authentication information receiving means in the transmission information and transmitting the authentication information to the store terminal by voice is executed.
The server
A demodulation information receiving step for receiving the demodulated transmission information from the store terminal, and
A payment processing step that performs payment processing based on the transmission information received in the demodulation information receiving step, and
A payment result transmission step of transmitting the payment result in the payment processing step to the store terminal via the network is executed.
The store terminal further executes a payment result reception display step of receiving and displaying the payment result from the server.
A communication method characterized by that. A store terminal installed in a store, a program in a communication system including a communication terminal owned by the user, and a server communicatively connected to each other via a network before Symbol shop terminal,
The store terminal
An authentication information generation means that generates authentication information that can be used only for one-time authentication when the user detects that they are close to each other.
An authentication information transmitting means for transmitting the authentication information generated by the authentication information generating means to the communication terminal by voice.
A receiving means for receiving transmission information, which is information to be transmitted from the communication terminal, by voice.
It functions as a demodulated information transmitting means that demodulates the transmission information received by the receiving means and transmits it to the server via the network.
The communication terminal
An authentication information receiving means for receiving the authentication information by voice from the store terminal,
The transmission information includes the authentication information received by the authentication information receiving means and functions as a transmission means for transmitting the authentication information to the store terminal by voice.
The server
Demodulated information receiving means for receiving the demodulated transmission information from the store terminal,
A payment processing means that performs payment processing based on transmission information received by the demodulation information receiving means,
The payment result in the payment processing means is made to function as a payment result transmission means for transmitting the payment result to the store terminal via the network.
Further functioning of the store terminal as a payment result reception display means for receiving and displaying the payment result from the server.
A program characterized by that.

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