JP2012105100A - System, method, and program for terminal-to-terminal connection - Google Patents

Abstract

In a situation where there are a large number of sets of terminals to be connected, a specific set of terminals can be reliably paired with a simple operation without causing a collision.
In two terminals 101 and 201 to be paired, when one user simultaneously contacts a right index finger and a left index finger with respect to a pulse wave sensor 102 and 202, respectively, the corresponding terminal comes from the index finger of the user. Key information including the waveform information of the detected volume pulse wave, the detection time information, and the terminal address is generated and transmitted to the pairing server 301. The pairing server 301 collates the key information sent from each of the terminals 101 and 201, and has a common area where time information overlaps for a certain time or more and the distance between waveform information is less than a certain value, The terminal 101, 201 is determined to be pairable and its terminal address is stored. Thereafter, the file transfer between the terminals 101, 201 is relayed using the stored terminal address.
[Selection] Figure 1

Description

  The present invention relates to an inter-terminal connection system, method, and program for connecting specific terminals to each other in an environment where a large number of terminals exist.

  In recent years, various fixed terminals or mobile terminals such as tablet terminals, mobile phones, and personal computers have become widespread. Many of these terminals are compatible with wireless networks such as WiFi, Bluetooth (registered trademark), 3G standard mobile communications networks, and wireless connection methods such as infrared rays. It is possible to transmit files such as texts and photos stored in the terminal to each other.

  By the way, in order to perform file transfer between specific terminals in an environment where a large number of terminals exist, it is necessary to connect the corresponding terminals in a one-to-one relationship in advance. This connection method between terminals is called pairing. When pairing is possible, for example, it is possible to pair terminals of specific participants in a conference hall where a large number of participants exist and transfer a file only between these terminals. This method is very convenient when performing selective distribution in which a specific file is distributed only to a specific participant.

However, when pairing between terminals, conventionally, the following method has been used.
First, in the first method, when the user manually inputs identification information consisting of the same multiple-digit numbers, etc., to each terminal to be paired, and the above-mentioned identification information entered between the terminals is matched (See, for example, Non-Patent Document 1).

  However, in the first method, the input buttons of the portable terminal are generally small, and there are many models having only a software keyboard. For example, the input device is poor, and thus the burden on the user's operation is large. In addition, when there are a plurality of sets of terminals to be connected and pairing of these sets is performed at the same time, there is a possibility that the identification information competes and the connection between the terminals collides.

  Therefore, recently, as a second method, for example, a method of displaying a list of terminals that can be connected to a wireless network in advance and selecting a terminal to be connected from this list is widely used. However, with this method, only the names of connectable terminals are displayed in a list format, and the user must search for and select a target terminal from this list. It is difficult to search for the terminal, and the operational burden on the user is still large.

In addition, as a third method, a method is proposed in which buttons are simultaneously pressed in each pairing terminal, and the terminals are paired if the difference in operation timing of these buttons is within a predetermined time ( For example, refer nonpatent literature 2.). With this method, it is possible to pair desired terminals without imposing a burden on the user on operation.
However, in the third method, there is a problem that a collision occurs at the time of connection when different users try to perform pairing between different terminals at the same time.

Furthermore, as a fourth method, there is also proposed a method for performing pairing by performing communication using a directional signal such as infrared rays between terminals to be connected (see, for example, Patent Document 1).
However, in the fourth method, it is necessary to consider the orientation of the terminals when performing communication, such as arranging the terminals so that their infrared communication interfaces face each other. In addition, it is necessary to consider that there are no obstacles between the infrared communication interfaces. For this reason, for example, when the terminal is large and heavy or fixed, pairing is impossible or even if it is possible, the burden on the user is large.

JP 2009-164874 A

BlackBerry Curve 9300 Smartphone User Guide Version: 5.0 "Scaling method for terminal pairing based on simultaneous click operation", Takashi Oshiba, Hideaki Kobayashi, Information Processing Society of Japan Research Report 2009-GN-70

As described above, the methods that have been used or proposed in the past have a heavy operational burden on the user under a situation where there are multiple sets of terminals to be connected, or pairing between multiple sets of terminals. There was a risk of time collisions.
The present invention has been made paying attention to the above circumstances, and its purpose is to create a collision with a specific set of terminals even in a situation where there are many sets of terminals to be connected. An object of the present invention is to provide a terminal-to-terminal connection system, method and program capable of reliably pairing without any problem.

  To achieve the above object, according to a first aspect of the present invention, a procedure for establishing a one-to-one connection between a first terminal and a second terminal via a wireless line is performed via a connection control device. In the inter-terminal connection system to be executed, the first and second terminals detect information on the volume pulse wave from the living body part of the same user using the pulse wave sensor, and the volume detected by the pulse wave sensor Key information including information on the pulse wave is generated and transmitted to the connection control device. The connection control device determines whether or not the connection between the first terminal and the second terminal is possible by checking the key information sent from each of the first and second terminals. Based on this, the connection between the first terminal and the second terminal is controlled.

  According to a second aspect of the present invention, there is provided an inter-terminal connection in which the first terminal executes a procedure for connecting the first terminal and the second terminal in a one-to-one manner via a wireless line. In the system, the first and second terminals detect information relating to the volume pulse wave from the body part of the user using the pulse wave sensor, and generate key information including information relating to the detected volume pulse wave To do. Then, the first terminal acquires key information of the second terminal from the second terminal, and collates the acquired key information of the second terminal with the generated key information of the first terminal. Thus, whether or not the connection with the second terminal is possible is determined, and the connection with the second terminal is controlled based on the determination result.

  When the plethysmogram, which is human biological information, is obtained from the same person, for example, from the abdomen of the left index finger and the abdomen of the right index finger, a similar waveform can be obtained at a high frequency. On the other hand, even if it is the same living body part, the volume pulse wave acquired from different human living body parts has a different waveform. The volume pulse wave can be easily acquired by touching a pulse wave sensor with a living body part such as a fingertip.

  Therefore, as in the above first and second aspects, the first and second terminals detect the volume pulse wave of the same user, and collate the information related to the detected volume pulse wave. Even in a situation where there are a plurality of sets of terminals, it is possible to reliably perform pairing between the first and second terminals. Further, when pairing, the user only has to contact his / her left index finger and right index finger almost simultaneously with the pulse wave sensors of the first and second terminals to be connected, for example, so that the identification information can be manually input. It is no longer necessary to select a connection partner terminal from a list in which a large number of terminals are registered, thereby greatly reducing the operational burden.

The first and second aspects of the present invention are also characterized by having the following specific configuration.
In the first configuration, when generating the key information, the waveform information of the volume pulse wave detected by the pulse wave sensor includes time information indicating the detection period of the volume pulse wave and terminal identification information, and is connected. When determining whether or not it is possible, the degree of overlap of time information and the distance between waveform information of volume pulse waves are calculated between the key information of the first terminal and the key information of the second terminal. Based on these calculation results, it is determined whether or not connection is possible.
More specifically, it is determined whether or not the common time in which the time information overlaps is equal to or greater than a preset time and the distance between the waveform information of the volume pulse wave is equal to or less than a preset threshold value. When this condition is satisfied, the first terminal and the second terminal can be connected.
In this way, only when the same user touches the pulse wave sensor of the first and second terminals with a finger or the like within the same period and the waveform information of the volume pulse wave is similar, The terminal is determined to be connectable. Therefore, it is possible to more accurately determine whether or not connection (pairing) is possible.

In the second configuration, prior to the calculation of the degree of overlap of the time information, the time information included in the key information of the first and second terminals is stored in the connection control device or the clock means incorporated in the first terminal. The timekeeping time is corrected as the reference time.
When determining whether or not connection is possible, if there is a time difference between the internal times between the first and second terminals, the degree of overlap of time information cannot be accurately calculated, which is a problem. However, the time information generated by each of the first and second terminals is corrected using the time measured by the internal clock in the connection control device or the first terminal as a reference time. For this reason, it is possible to calculate the degree of overlap of time information under a unified correct time axis.

In the third configuration, prior to calculating the distance between the waveform information of the volume pulse wave, each waveform information of the volume pulse wave included in the key information of the first and second terminals is set to the maximum value of the waveform information. And normalization based on the minimum value.
An experiment was conducted to compare multiple volume pulse wave waveforms acquired at the same time from the same person using pulse wave sensors with the same specifications. It was found that the possible ranges of the amplitude and waveform values do not necessarily match. However, as described above, the range of waveform information values can be normalized between the first and second terminals to be connected, so that it is easy to determine whether or not they are the same human waveform. Can be done. Further, even if the specifications of the pulse wave sensors mounted on each terminal to be paired are different, the comparison can be easily performed.

In the fourth configuration, when determining whether or not connection is possible, prior to calculating the distance between waveform information of volume pulse waves, the normalized waveform information is further subjected to first-order differentiation or second-order differentiation. .
Thus, by calculating the distance between the waveform information using the differentiated waveform obtained by differentiating the normalized waveform information, the difference in waveform between users can be made more prominent, and multiple users can perform pairing. It becomes possible to improve the accuracy when performing.

The fifth configuration compares the number of sampling data of the waveform included in the common time among the waveform information among the waveform information of the volume pulse wave when determining whether connection is possible, and samples the result of this comparison. When the number of data is the same, the number of sampling data is selected as the common number, and when the number of data is different, the smaller number of sampling data is selected as the common number. Then, for each of the waveform information, the sampling data corresponding to the common number is extracted from the head position as first and second waveform data series, and the extracted first waveform data series and second waveform data series are extracted. The distance between the waveform information is calculated by calculating the square sum of the difference between the sampling data corresponding to the order and dividing the calculated square sum by the common number. is there.
If it does in this way, it will become possible to calculate the similarity of waveform information as a distance by calculating the difference for every component in two waveform information which overlaps for a fixed time or more.

In the sixth configuration, when calculating the distance between the waveform information of the volume pulse wave, the sampling data is excluded by the number corresponding to the phase shift amount from the beginning or the end of the first and second waveform data series. First and second phase correction data series are generated respectively. Then, between the generated first phase correction data series and the second phase correction data series, a square sum of differences between the sampling data corresponding to the order is calculated, and the calculated square sum Is divided by the number obtained by subtracting the number of data corresponding to the amount of phase shift from the common number to calculate the distance between the waveform information.
In general, even if the time difference of internal time between terminals is corrected, there may be a phase shift between waveform information depending on individual differences between terminals. However, by calculating the distance between the waveform data series in consideration of the phase shift as described above, it is possible to perform pairing in which the phase shift is also corrected.

  That is, according to the present invention, even when there are a large number of terminal sets to be connected, a pair of specific terminals can be reliably paired with a simple operation without causing a collision. A connection system, method and program can be provided.

1 is a block diagram illustrating a configuration of an inter-terminal connection system according to a first embodiment of the present invention. The flowchart which shows the procedure of the key information calculation process performed in the terminal of the system shown in FIG. The figure which shows an example of the key information memorize | stored in the key information storage part provided in the pairing server of the system shown in FIG. The flowchart which shows the procedure and processing content of the pairing process performed in the pairing server of the system shown in FIG. The flowchart which shows the procedure of a pairing determination process among the procedures of the pairing process shown in FIG. 4, and a processing content. The figure for demonstrating the 1st method of calculating the distance between pulse wave information among the procedures of the pairing determination process shown in FIG. The figure for demonstrating the 2nd method of calculating the distance between pulse wave information among the procedures of the pairing determination process shown in FIG. The block diagram which shows the structure of the inter-terminal connection system concerning 2nd Embodiment of this invention. The flowchart which shows the procedure and processing content of the pairing process performed by the terminal of the system shown in FIG.

Embodiments according to the present invention will be described below with reference to the drawings.
(First embodiment)
In the first embodiment of the present invention, for example, in a conference room where there are a large number of terminals, these terminals transmit whether pairing is possible between the first terminal and the second terminal to be connected. The pairing server makes a determination based on the waveform information of the volume pulse wave included in the key information and the detection time information thereof, and when it is determined that pairing is possible, the pairing server is subsequently set between the first and second terminals. The file transfer is performed through the network.

FIG. 1 is a block diagram showing the configuration of an inter-terminal connection system according to the first embodiment of the present invention. 101 and 201 are first and second terminals, and 301 is a pairing server. .
First, each of the first and second terminals 101 and 201 is a portable information terminal such as a mobile phone, a smart phone, a PDA (Personal Digital Assistant), or a notebook personal computer, and implements the present invention. As necessary constituent elements, pulse wave sensors 102 and 202, key information calculation units 103 and 203, transmission / reception units 104 and 204, terminal information processing units 105 and 205, file storage units 106 and 206, information Display units 107 and 207 are provided. Among these, the key information calculation units 103 and 203, the transmission / reception units 104 and 204, and the terminal information processing units 105 and 205 are realized by causing a central processing unit (CPU) to execute an application program.

  The pulse wave sensors 102 and 202 detect a volume pulse wave, which is biological information, from the biological part of the user within a pulse wave detection period specified by the terminal information processing units 105 and 205 described later. Specifically, a light emitting element for emitting infrared rays to a living body part, and infrared rays scattered without being absorbed by hemoglobin present in the blood of the living body part among infrared rays irradiated to the living body part The light receiving element. An infrared LED is used as an example of the light emitting element, and a photodiode or a phototransistor is used as an example of the light receiving element. The signal output from the light receiving element is taken out as an analog pulse wave signal via a low-pass filter circuit and an amplifier circuit, and is output to the key information calculation units 103 and 203.

  When the key information calculation units 103 and 203 receive the pulse wave signals output from the pulse wave sensors 102 and 202, the key information calculation units 103 and 203 calculate waveform information from the pulse wave signals. Further, information representing the pulse wave detection period by the pulse wave sensors 102 and 202 and terminal identification information are acquired from the terminal information processing units 105 and 205, and the calculated waveform information and the acquired detection period information are acquired. And key information including terminal identification information.

  The transmission / reception units 104 and 204 have a wireless interface, and transmit the key information created by the key information calculation units 103 and 203 to the pairing server 301. As the wireless interface, for example, a well-known wireless communication interface such as WiFi, Bluetooth (registered trademark), wireless LAN (Local Area Network), or a 3G standard mobile communication network is used.

  The file storage units 106 and 206 use a large-capacity nonvolatile memory such as an HDD (Hard Disc Drive) or a NAND flash memory as a storage medium, and store data files of materials used in meetings, for example. Used for.

  The terminal information processing units 105 and 205 have a terminal connection control function and a file transfer control function. When the terminal connection control function receives a terminal connection processing start request from the input unit (not shown), the terminal connection control function generates guidance information for pulse wave detection for the user and displays the guidance information on the information display units 107 and 207. An operation start signal and an end signal for designating a pulse wave detection period are given to the pulse wave sensors 102 and 202. Further, in order to create key information, the detection period information and terminal identification information are output to the key information calculation units 103 and 203. The file transfer control function performs transmission control of the data file stored in the file storage units 106 and 206 in a state where a wireless connection is established with another terminal.

  The information display means 107 and 207 are composed of, for example, a liquid crystal display, and display the guidance information, the pairing processing end notification message, the file transfer completion notification message, and the like under the control of the terminal information processing units 105 and 205. .

  Next, the pairing server 301 comprises a server computer, and functions necessary for carrying out the present invention include a transmission / reception unit 302, a key information storage unit 303, a pairing processing unit 304, and a pair information storage unit 305. A time information correction unit 306 is provided. Among these, the pairing processing unit 304 and the time information correction unit 306 are realized by causing the CPU to execute an application program.

  The transmission / reception unit 302 includes wireless communication interfaces such as WiFi, Bluetooth (registered trademark), wireless LAN (Local Area Network), and the like from the terminals existing in the conference room, in the same manner as the transmission / reception units of the terminals 101 and 201 described above. A processing function for receiving the transmitted key information and storing it in the key information storage unit 303, a processing function for transmitting a pairing determination result by the pairing processing unit 304 described later, and a pair stored in the pair information storage unit 305 A file transfer function between the terminals according to the ring target terminal address.

  The key information storage unit 303 is used for storing the key information of each terminal received by the transmission / reception unit 302. The pair information storage unit 305 is used to store the terminal addresses of two terminals whose validity is recognized as a connection target by the pairing processing unit 304 described below in association with each other.

  Each time new key information is stored in the key information storage unit 303, the time information correction unit 306 extracts detection period information from the key information, and sets the detection start time and end time included in the period information as a pair. A process of correcting the time of the internal clock provided in the ring server 301 as the reference time is performed.

  The pairing processing unit 304 calculates, for each set of key information of each terminal stored in the key information storage unit 303, the degree of overlap between detection periods and the degree of similarity between volume pulse wave waveform information. Based on these calculation results, a process for determining whether or not connection is possible is performed. Specifically, when the common time in which the detection periods overlap with each other is equal to or longer than a preset time and the distance between the waveform information of the volume pulse waves is equal to or less than a preset threshold, the key information is The two transmitted terminals are determined to be pairing targets, and the terminal addresses of the two terminals determined to be pairing targets are stored in the pair information storage unit 305. On the other hand, if either one of the above two conditions is not satisfied, the two terminals are not paired.

Next, the operation of the system configured as described above will be described.
Here, the user of the first terminal 101 applies for permission of pairing to the pairing server 301 using the second terminal 201 owned by another user as a pairing partner, and thereafter the first terminal 101 and the first terminal 101 A case where file transfer is performed with the second terminal 201 via the pairing server 301 will be described as an example.

(1) Key information creation processing in terminals 101 and 201 First, a user inputs a terminal connection start request via an input unit (not shown) provided in first terminal 101. Upon receiving this connection start request, the first terminal 101 causes the information display unit 107 to display a guidance message that prompts the terminal information processing unit 105 to contact the ecological part with the pulse wave sensor 102. Subsequently, a detection start signal is given to the pulse wave sensor 102, and a stop signal is given when a preset detection period has elapsed.

  Here, the detection period is set to a fixed time, but the length is preferably set to a time that is sufficiently long as key information for connecting the terminals and does not place a burden on the user. In general, the peak number of the waveform signal of the volume pulse wave corresponds to the pulse rate, and the normal human pulse rate is 60 times or more per minute. For this reason, if calculating backward from the above numerical values, one second is required to detect a pulse wave waveform for one period. Further, by acquiring waveforms for a plurality of periods, even if a deviation occurs in the pulse wave signal acquisition time between the terminal 101 and the terminal 201, the deviation can be absorbed. In the present embodiment, in consideration of this point, the length of the detection period is set to 2 seconds to 3 seconds, for example, and a plurality of pulse waves are detected during this period. It is not necessarily limited to this value.

  When the above guidance message is displayed, the user next uses his / her right index finger with respect to the pulse wave sensors 102 and 202 at the second terminal 201 of the other user who is paired with the first terminal 101 of the user. And the left index finger in contact at the same time. Then, the pulse wave sensor 102 of the first terminal 101 detects a pulse wave from the left index finger of the user during a period from when the detection start signal is input to when the end signal is input, and the pulse wave signal is the key signal. The information is input to the information calculation unit 103.

When the pulse wave signal is input, the key information calculation unit 103 first calculates the waveform information from the pulse wave signal in step S11 as shown in FIG.
That is, first, the pulse wave signal is converted into a digital signal, and the amplitude of the digitized pulse wave signal is normalized to a certain range. When converting a pulse wave signal into a digital signal, the sampling rate representing the number of samples per second does not lose information on the pulse wave signal acquired by the pulse wave sensor 102, and the amount of data does not become too large. It is desirable to set a value, for example, set to 100 Hz or 200 Hz. However, it is not limited to this value.

  Further, the following method is used as a normalization method. That is, first, the minimum amplitude value and the maximum amplitude value are extracted from a plurality of sampling data included in the digital pulse wave signal. Then, the minimum amplitude value is subtracted from all the sampling data, and the entire sampling data is further divided by the maximum amplitude value. By this processing, a digital waveform data series composed of sampling data having a value of 0 or more and 1 or less can be obtained as waveform information. The first-order differential signal is obtained by performing first-order differentiation on the waveform data series in which the amplitude is normalized, and the first-order differential signal is used as waveform information. The second-order differential signal may be obtained by performing second-order differentiation on the waveform data series in which the amplitude is normalized, and the second-order differential signal may be used as waveform information. Further, the normalized waveform data series may be used. The peak value may be detected from the waveform and the peak detection signal may be used as waveform information.

Next, in step S12, the key information calculation unit 103 gives time information indicating the detection period of the pulse wave to the calculated waveform information. As the time information, a detection start time and an end time when the pulse wave sensor 102 detects a pulse wave signal are used.
For example, it is assumed that A / D conversion and normalization are performed when calculating the waveform information in step S11, and the detection start time when the pulse wave sensor 102 detects a pulse wave signal is 0:00:00 If the end time is 00:00:00, the detection start time and end time are used as time information.

  On the other hand, when calculating the waveform information in step S11, if only the peak value is detected in addition to the A / D conversion and normalization and this is used as the waveform information, the detection start time and the A / D conversion are performed. The peak time is calculated using the sampling rate at the time of execution, and this time is given in association with the peak value in the waveform information.

  Subsequently, in step S13, the key information calculation unit 103 gives the terminal address of its own terminal 101 to the calculated waveform information. The terminal address is identification information uniquely assigned to the terminal 101. As an example, an IP (Internet Protocol) address, a MAC (Media Access Control) address, and an IMEI (International Mobile Equipment Identity) can be used. The information is not limited as long as the information can identify the terminal 101.

Finally, the first terminal 101 transmits the key information created by the key information calculation unit 103 from the transmission / reception unit 104 to the pairing server 301.
The processing from the detection of the pulse wave signal performed at the first terminal 101 to the creation and transmission of the key information is performed at the second terminal 201 in exactly the same manner.

(2) Pairing determination process in pairing server 301 (2-1) Reception / storage process of key information The pairing server 301 monitors the arrival of key information from each terminal. When key information is transmitted from the terminal in this state, the key information is received by the transmission / reception unit 302 and then stored in the key information storage unit 303. FIG. 3 shows an example of key information stored in the key information storage unit 303.

(2-2) Time information correction processing When new key information is stored in the key information storage unit 303, the time information correction means 306 reads out the newly stored key information and is included in the key information. The time information of the detection period is corrected based on the time measured by the internal clock of the server 301. This time information correction processing calculates the time difference between the information representing the internal time of the terminal having the terminal address included in the key information and the time measured by the internal clock of the pairing server 301, and calculates the calculated time difference. This is done by adding or subtracting to the time information of the key information.

For example, the internal time of the first terminal 101 is 12:01:00 on January 1, 2010, and the internal time of the pairing server 301 is 12:01:05 on January 1, 2010. Suppose that the start time in the time information of the key information is 1 January 2010 12:00:55, and the end time is 10:00 2010 11: 00: 58: 00. In this case, the internal time of the terminal 101 is delayed by 5 seconds with respect to the internal time of the pairing server 301. Accordingly, in this case, the start time of the key information is advanced from January 1, 2010, 12:00:55, 5 seconds to January 1, 2010, 12:01:00, 00, and the end time is changed to 2010. Corrections are made on January 1, 2010 at 12:01:03, 00, which was advanced 5 seconds from January 1, 12: 00: 58.00. Note that SNTP (Simple Network Time Protocol) is known as a method for calculating the time difference.
The time correction process described above is similarly performed on the key information sent from the second terminal 201.

(2-3) Overview of Pairing Determination Processing Next, the pairing server 301 uses the key information including the detection period information corrected by the time by the pairing processing unit 304 to store the key information in the key information storage unit 303. It is determined whether or not pairing between terminals is possible for all combinations of terminals in which is stored. FIG. 4 is a flowchart showing the processing procedure and processing contents.

  In step S20, the pairing processing unit 304 first determines whether or not the number of key information records in the key information storage unit 303 is two or more. If it is one or less, the pairing processing unit 304 ends the processing without performing the pairing determination. To do.

  On the other hand, it is assumed that the number of records is 2 or more. In this case, the pairing processing unit 304 first initializes variables i and j indicating the number of rows in the key information storage unit 303 in steps S21 and S22 to i = 1 and j = i + 1, respectively, and then in step S23, i rows Whether or not pairing is possible is determined by reading and comparing the key information of the eye and the key information of the j-th row.

  If pairing is impossible as a result of this determination, the process proceeds to step S24 to determine whether or not the value of the variable j has reached the number of key information records in the key information storage unit 303. If j has not reached the number of records, the variable j is incremented in step S25 and the process returns to step S23. The key information in the j-th row after the increment is read and compared with the key information in the i-th row. Judge whether pairing is possible. Thereafter, similarly, until it is determined that pairing is possible, j is incremented, and the key information on the j-th row after the increment and the key information on the i-th row are sequentially compared to determine whether pairing is possible. repeat.

When the value of j reaches the number of records, the process proceeds to step S26 to determine whether or not the variable i has reached the number of records. If i has not reached the number of records, the variable i is incremented to i = i + 1 in step S27 and the process returns to step S22. Here, the variable j is initialized to j = i + 1, and the process proceeds to step S23. Then, the key information of the i-th row after the increment and the key information of the initialized j-th row are read from the key information storage unit 303, respectively, and compared to determine whether pairing is possible. If pairing is impossible as a result of this determination, in steps S24, S25, and S23, the key information of the i-th row after the increment and the key information from the j = i + 1-th row to the j = (number of records) row are obtained. The process of determining whether pairing is possible by comparing sequentially is repeated.
Thereafter, each time i is incremented, the key information of the incremented i-th row and the key information from the j = i + 1-th row to the j = (number of records) row are sequentially compared to determine whether pairing is possible. The process of determining is repeated.

  Now, in the process of determining whether pairing is possible, it is assumed that a pairing condition is satisfied as a result of comparing the key information on a certain i-th line with the key information on a certain j-th line and it is determined that pairing is possible. Then, the pairing processing unit 304 proceeds from step S23 to step S28, and stores the i-th key information and the j-th key information in the pair information storage unit 305 in association with each other. Then, the key information of the i-th row and the key information of the j-th row are deleted from the key information storage unit 303, and the storage information of the key information storage unit 303 is updated.

  When the above-described pairing permission / inhibition determination process for all combinations of i and j is completed, the pairing processing unit 304 finally obtains key information for which a preset time has elapsed since the storage in step S30. Delete from the key information storage unit 303.

(2-4) Details of Pairing Determination Process By the way, the pairing determination process in the information step S23 is performed as follows. FIG. 5 is a flowchart showing the processing procedure and processing contents.
That is, in step S231, the pairing processing unit 304 first compares the time information indicating the detection period included in the i-th key information with the time information indicating the detection period included in the j-th key information. It is determined whether or not there is a region that overlaps for a time length of. As a result of this determination, if there is an area that overlaps for a certain length of time, a pair of the terminal that has transmitted the i-th key information and the terminal that has transmitted the j-th key information is determined as a pairable candidate, and step S232 Migrate to On the other hand, if there is no area that overlaps for a certain length of time, the process proceeds to step S235 and it is determined that the pair of terminals is not pairable.

  For example, the start time of the time information included in the key information in the i-th row is 2010/01/1 12:00:55, and the end time 2010/1/1 12:00:58, j It is assumed that the start time of the time information included in the key information on the line is 2010/01/1 12:00:56, and the end time is 2010/01/1 12: 00: 59.00. Then, when the condition of the overlapping time region is set to, for example, 1 second by experiment or the like in advance, the time information included in the i-th key information and the time information included in the j-th key information overlap each other for 2 seconds. It is determined that the overlapping time domain condition is satisfied. On the other hand, when there is no overlap of time information like the key information of records No. 3 and No. 4 shown in FIG. 3, it is determined that the above overlapping time region condition (1 second or more) is not satisfied, and the above record It is determined that the key information of No3 and No4 is not pairable.

  When the process proceeds to step S232, the pairing processing unit 304 obtains the distance D between the waveform information included in the key information of the i-th row and the waveform information included in the key information of the j-th row in the step S232, In step S233, it is determined whether or not the distance D is equal to or less than a preset threshold value. If the distance D is equal to or smaller than the threshold value as a result of this determination, the process proceeds to step S234, and a pair of the terminal that transmitted the i-th key information and the terminal that transmitted the j-th key information is paired. It is determined that ringing is possible. On the other hand, if the distance D exceeds the threshold value, it is determined in step S235 that the pair of the terminal that has transmitted the i-th key information and the terminal that has transmitted the j-th key information is not pairable. To do.

As a method for calculating the distance D between the waveform information, the following two methods are conceivable.
[First distance calculation method]
First, in the common area where the waveform information included in the key information of the i-th row and the waveform information included in the key information of the j-th row overlap in time, the number of sample points existing in the two waveform information is unified. As a method of unifying the number of sample points existing in the waveform information, a method of removing a larger number of sample points from the end of the waveform information sample point having a large number of sample points out of the two waveform informations can be considered. Here, the number of unified sample points is represented by M, and the waveform information unified into M pieces of waveform information included in the key information of the i-th row in the common area is represented by Si1,. Waveform information unified into M pieces of waveform information included in the key information in the j-th row is represented by Sj1,... SjM.

この式において、ｍは２つの波形情報のサンプル点のうち先頭からｍ番目であるということを表す。すなわち、Ｓｉｍはｉ行目の波形情報の先頭からｍ番目のサンプル点を表す。かくして、共通領域における２つの波形情報の距離Ｄが算出される。 Next, the difference between each sample point is squared and added in order from the beginning of the two waveform information with the M sample points unified, and M is the number of the added values. The divided value is defined as a distance, and this distance is used as a measure of similarity. The distance D is expressed by the following formula.

In this equation, m represents the mth from the beginning of the sample points of the two waveform information. That is, Sim represents the mth sample point from the beginning of the waveform information in the i-th row. Thus, the distance D between the two waveform information in the common area is calculated.

  FIG. 6 shows an example of the distance calculation process by the first distance calculation method described above, that is, the distance calculation process when the phase shift between the waveform information is not taken into consideration. In the figure, there are 8 sample points in the first waveform Si and 9 sample points in the second waveform Sj in the common area. Therefore, one sample point is deleted from the second waveform Sj to obtain eight, and the difference is obtained between the eight sample points of the first and second waveforms. Then, the sum of squares of these differences is calculated, and the distance is calculated by dividing the calculated value of the sum of squares by 8 of the number of samples.

[Second distance calculation method]
First, M is the number obtained by summing up the difference of each sample point squared in order from the beginning of the two waveform information in which M sample points are unified into M pieces, and then adding up the added values. Divide by Then, the distance obtained as a result is stored in the memory as a provisional distance.

  Next, Si2,..., SiM, which are new waveform information obtained by removing one sample point from the head of the waveform information included in the key information included in the i-th row, and 1 from the end of the waveform information included in the key information in the j-th row. Sj1,..., SjM-1, which are new waveform information from which one sample point is removed, are respectively generated. Then, the difference is obtained for each sample point in order from the top of the new waveform information having these two M-1 sample points, and the sum of squares of the differences of the obtained sample points is obtained. Divide by (M-1) which is the number of times this sum of squares is added. Thereby, the similarity between the two waveform information is calculated in consideration of the phase shift for one sample point. The similarity when comparing the M-1 sample points calculated here and the similarity when comparing the M sample points are compared, and the value is smaller, that is, the similarity is higher. Update provisional similarity with value.

  Subsequently, Si3,..., SiM, which are new waveform information obtained by removing two sample points from the beginning of the waveform information included in the key information in the i-th row, and the end of the waveform information included in the key information in the j-th row. Sj1,..., SjM-2, which are new waveform information from which two sample points are removed, are generated. Then, the difference is also obtained for each sample point in order from the top of the new waveform information having these two M-2 sample points. Then, the difference for each sample point is squared and added, and then divided by (M−2), which is the number of times the sum of the squares is added. Calculate the similarity of two pieces of waveform information. Then, the calculated similarity is compared with the provisional similarity, and when the calculated similarity is less than the provisional similarity, the provisional similarity is calculated based on two waveform information in consideration of a phase shift of two sample points. Update with similarity.

  Comparing and updating the similarity calculation and provisional similarity considering such phase shift, while increasing the number of sample points to be removed from the head and tail by one, the upper limit of phase shift specified in advance After that, the provisional distance is expressed as D as the final distance.

すなわち、Ｍ個のサンプル点を用いて２つの波形情報同士の距離を算出する場合には、この式においてｌ＝０とした時の値を求めればよく、また１サンプル点分だけ位相ずれを考慮した場合の距離は、この式においてｌ＝１とした時の値を求めればよい。 By doing this, even when a phase shift due to individual differences depending on the terminal exists in the waveform information, it is possible to correctly calculate the similarity between the waveform information by absorbing this phase shift. Here, when the number of sample points to be removed from the beginning and end is represented by a lowercase letter l, and when the distance between waveform information from which l sample points have been removed from the beginning and end is denoted by dl, dl is represented by the following expression. Is done.

That is, when calculating the distance between two pieces of waveform information using M sample points, it is only necessary to obtain the value when l = 0 in this equation, and also consider the phase shift by one sample point. The distance in this case can be obtained by a value when l = 1 in this equation.

  FIG. 7 shows an example of calculation processing by the above-described second distance calculation method, and shows a case where the phase shift up to two sample points is taken into consideration. In the figure, first, the number of sample points of the first waveform and the second waveform in the common area is unified to eight. Then, while increasing the number of sample points to be removed from the beginning and the end by one, the calculation of the similarity between the sample points and the calculation of the distance up to the upper limit number of phase shifts (for example, two) defined in advance, The smallest value among the distances obtained by these calculations is defined as the distance D between the waveform information.

(2-5) File Transfer Processing Between Terminals When pairing determination for all the combinations of terminals is completed, the pairing server 301 executes inter-terminal connection processing according to the pairing determination result as follows.
In other words, for example, it is assumed that the terminal information of the first terminal 101 and the second terminal 201 is stored in the pair information storage unit 305 as a combination of terminals permitted to be paired.

  In this case, the pairing server 301 reads the terminal addresses of the first terminal 101 and the second terminal 201 that are permitted to perform the pairing from the pair information storage unit 305 under the control of the transmission / reception unit 302, and these terminals. A connection establishment signal indicating that a connection has been established is transmitted to 101 and 201. On the other hand, when the first and second terminals 101 and 201 receive the connection establishment signal by the transmission / reception means 104 and 204, they are connected to the information display units 107 and 207 under the control of the terminal information processing units 105 and 205. Display a message that the message is established.

  When the user who has confirmed this display message selects a file to be transferred from the files stored in the file storage unit 106 in the first terminal 101 and performs a transmission operation, the terminal information processing unit 105 performs the file storage unit. The file selected by the user is read from 106 and this file is transmitted to the pairing server 301. On the other hand, when the pairing server 301 receives the file transmitted from the first terminal 101 by the transmission / reception unit 302, the pairing server 301 is allowed to pair with the terminal 101 from the pair information storage unit 305, that is, the terminal The terminal address of the second terminal 102 that has established a connection with the terminal 101 is read out. Then, the destination address is replaced with the terminal address of the second terminal 201, and the file is transmitted to the second terminal 201. The second terminal 201 receives the file transmitted from the transmission / reception unit 302 of the pairing server 301 by the transmission / reception unit 204. Then, under the control of the terminal information processing unit 205, the received file is stored in the file storage unit 206, and a message that the file has arrived is displayed on the information display unit 207.

  When the user performs a pairing cancellation operation on the first terminal 101 after the file transfer is completed, a request signal to that effect is sent to the pairing server 301. When receiving this cancellation request signal, the pairing server 301 deletes the corresponding terminal address in the pair information storage unit 305.

  As described in detail above, in the first embodiment, when the user brings the right and left index fingers into contact with the pulse wave sensors 102 and 202 almost simultaneously at the two terminals 101 and 201 to be paired, Terminal information 101, 201 creates key information including the waveform information of the volume pulse wave detected from the user's index finger, time information indicating the detection time, and the terminal address by the key information calculation units 103, 203, and the transmission / reception unit 104 and 204 are transmitted to the pairing server 301. On the other hand, the pairing server 301 receives the key information transmitted from each of the terminals 101 and 201 by the transmission / reception unit 302 and stores it in the key information storage unit 303. Then, the key information is collated by the pairing processing unit 304. If the time information has a common area where the time information overlaps for a certain time or more and the distance between the waveform information is less than a certain value, the terminals 101 and 201 are paired. It is determined that ringing is possible, and the terminal address is stored in the pair information storage unit 305. Thereafter, the file transfer between the terminals 101 and 201 is relay-controlled using the stored terminal address.

  Therefore, by collating the waveform information of the volume pulse wave of the same user detected at the first and second terminals 101 and 201 with the detection time information, even in a situation where there are many terminals, The first and second terminals 101 and 201 can be reliably paired. Further, when pairing, the user only has to contact his / her left index finger and right index finger almost simultaneously with the pulse wave sensors 102 and 202 of the first and second terminals 101 and 201 to be connected. This eliminates the need to manually input the number of users and select a connection partner terminal from a list in which a large number of terminals are registered, thereby greatly reducing the operational burden.

  Prior to the key information collation, the difference between the time measured by the internal clocks of the first and second terminals 101 and 201 of the transmission source and the time measured by the internal clock of the pairing server 301 is detected. The time information included in the key information of the first and second terminals 101 and 201 is corrected based on the above. For this reason, even if there is a time lag between the first and second terminals 101 and 201, it is possible to always collate time information accurately without any influence.

  Further, when determining the similarity between waveform information of volume pulse waves, each waveform information is normalized based on the maximum value and the minimum value. In this way, even if the amplitudes and waveform values of the two volume pulse waveforms acquired from the same person at the same time do not match, or even if the characteristics vary between the pulse wave sensors 102 and 202. Therefore, it is possible to easily and accurately determine that the waveform is the same human waveform. In addition, since the normalized waveform information is first-order differentiated or second-order differentiated, it is possible to make the difference in waveform between users more prominent, thereby further improving the identification accuracy between users. It can be further enhanced.

Further, as a method for calculating the distance D between the waveform information, a method of calculating a difference for each component in two waveform information having an overlap of a certain time or more is used to calculate the similarity between the waveform information as a distance. Is possible.
Further, the first and second phase correction data series are generated by excluding sampling data by the number corresponding to the phase shift amount from the beginning or the end of the first and second waveform data series, respectively. Between the first phase correction data series and the second phase correction data series, a sum of squares of differences between the sampling data corresponding in order is calculated, and the calculated sum of squares is calculated from the common number. The number of data corresponding to the phase shift amount is divided by the subtracted number. In this way, even if there is a phase shift between the waveform information due to individual differences between terminals, calculating the distance between the waveform data series in consideration of the phase shift as described above, Pairing with correction becomes possible.

(Second Embodiment)
In the second embodiment of the present invention, the first terminal obtains key information from the second terminal as to whether or not pairing between the first terminal and the second terminal to be connected is possible. Thus, the determination is made by comparing with the key information of the first terminal.

  FIG. 8 is a block diagram showing a configuration of an inter-terminal connection system according to the second embodiment of the present invention, in which 11 indicates a master terminal and 21 indicates a slave terminal. In the figure, the same parts as those in FIG.

  First, the master terminal 11 is a necessary component for carrying out the present invention, as in the first embodiment, the pulse wave sensor 102, the key information calculation unit 103, the transmission / reception unit 104, and the terminal information processing. Unit 105, a file storage unit (not shown), and an information display unit 107, and further includes a pairing processing unit 108, a time information correction unit 109, a key information storage unit 110, and a pair information storage unit 111. ing. Among these, the key information calculation unit 103, the transmission / reception unit 104, the terminal information processing unit 105, the pairing processing unit 108, and the time information correction unit 109 are realized by causing the CPU to execute an application program.

The pairing processing unit 108 has the following processing functions.
(1) When the key information of the master terminal 11 is created by the key information calculation unit 103, an inquiry signal is transmitted from the transmission / reception unit 104 to the slave terminal 21 existing on the wireless network. When the key information transmitted from the slave terminal 21 in response to this inquiry is received by the transmission / reception unit 104, the received key information of the slave terminal 21 is stored in the key information storage unit 110.
(2) The key information of the slave terminal 21 stored in the key information storage unit 110 and the key information of the master terminal 11 created by the key information calculation unit 103 are collated, and the master terminal 11 and the slave terminal 21 Determine whether pairing is possible. And the process which stores in the pair information storage part 111 the terminal address of the slave terminal 21 determined that pairing is possible.

  Prior to the key information collating process by the pairing processing unit 108, the time information correcting unit 109 measures the time of the internal clock of the slave terminal 21 that has transmitted the key information stored in the key information storage unit 110, and the master terminal. 11 is obtained, and the time information included in the key information of the slave terminal 21 stored in the key information storage unit 110 is corrected based on this difference.

  Next, the slave terminal 21 includes, as components necessary for carrying out the present invention, a pulse wave sensor 202, a key information calculation unit 203, a transmission / reception unit 204, a terminal information processing unit 205, and a file storage unit (illustrated). In addition to the information display unit 207, a pairing processing unit 208 is further provided. Among these, the key information calculation unit 203, the transmission / reception unit 204, the terminal information processing unit 206, and the pairing processing unit 208 are realized by causing the CPU to execute an application program.

  The pairing processing unit 208 waits for a preset time in a state where the key information is generated by the key information calculation unit 203, and when the inquiry signal transmitted from the master terminal 11 is received by the transmission / reception unit 204, the above-described generation The key information is transmitted from the transmission / reception unit 204 to the master terminal 11. If the inquiry signal does not arrive from the master terminal 11 even after the standby time has elapsed, the created key information is deleted. The standby time is set to 30 seconds, for example.

Next, the operation of the system configured as described above will be described. FIG. 9 is a flowchart showing a processing procedure and processing contents by the master terminal 11.
In the master terminal 11 and the slave terminal 21, the processing until the key information including the waveform information of the user's volume pulse wave, its detection time information, and the terminal address is created by the key information calculation units 103 and 203 is described above. The same as in the first embodiment.

  When the key information is created, the master terminal 11 transmits an inquiry signal to the slave terminals existing within the communication range with the own terminal in step S41 under the control of the pairing processing unit 108. On the other hand, the pairing processing unit 208 of the slave terminal 21 stands by in a state where the key information is generated by the key information calculation unit 203. When an inquiry signal arrives from the master terminal 11 within a preset time, for example, 30 seconds in this state, the created key information is transmitted from the transmission / reception unit 204 to the master terminal 11. If the inquiry signal does not arrive from the master terminal 11 even after the waiting time has elapsed, the created key information is deleted.

  When the key information returned from the slave terminal 21 is received by the transmitting / receiving unit 104 after the inquiry signal is transmitted, the pairing processing unit 108 of the master terminal 11 receives the received key information in step S42 as a key information storage unit. 110. Note that even when key information arrives from a plurality of slave terminals, the key information is stored in the key information storage unit 110.

  When new key information is stored in the key information storage unit 110, the time information correction unit 109 reads out the stored new key information, and based on the terminal address included in the key information, the transmission source slave terminal 21 is specified. Then, a difference between a time measured by a built-in clock (not shown) of the slave terminal 21 and a time measured by a built-in clock (not shown) of the master terminal 11 is obtained, and the key information storage unit is obtained based on this difference. The time information included in the key information of the slave terminal 21 newly stored in 110 is corrected. A known SNTP (Simple Network Time Protocol) is used as a method for calculating the time difference.

  When the time correction processing is completed, the pairing processing unit 108 collates the key information of the slave terminal 21 stored in the key information storage unit 110 with the key information created by the master terminal 11 of itself, and It is determined whether there is a slave terminal 21 that can be paired with the terminal 11. The processing procedure and processing contents will be described below.

  That is, the pairing processing unit 108 first determines in step S43 whether or not the number of key information records in the key information storage unit 110 is one or more, that is, whether or not key information is stored. If not stored, pairing determination is not performed and the process is terminated.

  On the other hand, if the key information is stored, the variable i indicating the number of rows in the key information storage unit 110 is initialized to i = 1 in step S44, and the key information on the i-th row is then updated in step S45. The key information is read out and collated with the key information of the master terminal 11 created by the key information calculation unit 103. In this collation process, it is determined whether or not the distance between the waveform information is equal to or smaller than a certain value. If the distance between the waveform information is equal to or smaller than the certain value, the master terminal 11 and the i-th slave terminal 21 are paired. It is determined that ringing is possible.

  In the above-described pairing determination process, as in the first embodiment, whether or not the time information overlap is equal to or longer than a certain time and whether or not the distance between the waveform information is equal to or smaller than a certain value. Each is determined, and it is determined that pairing is possible when the overlap of time information is a certain time or more and the distance between the waveform information is a certain value or less.

  If it is determined that pairing is possible as a result of the collation, the pairing processing unit 108 stores the terminal address information of the i-th slave terminal in the pair information storage unit 111 in step S46. Finally, in step S49, the key information is deleted from the key information storage unit 110, and the process ends.

  On the other hand, it is assumed that the distance between the waveform information exceeds a certain value as a result of the collation in step S45. In this case, the pairing processing unit 108 determines that the master terminal 11 and the i-th slave terminal cannot be paired. Then, the process proceeds to step S47, where it is determined whether or not the value of i has reached the total number of records, and if it has reached, the process ends.

  On the other hand, if the value of i does not reach the total number of records, that is, if unmatched key information remains, i is incremented to i = i + 1 in step S48, and then the process returns to step S46. The later i-th key information and the key information of the master terminal 11 are collated. If the distance between the waveform information is larger than a certain value as a result of this collation, the value of i is incremented again in step S48, and the collation process in step S35 is repeated.

  When key information with a distance between waveform information equal to or less than a certain value is found by repeating the above collation processing, the slave terminal that transmitted the key information is determined as a pairing partner terminal, and the process proceeds to step S46. The terminal address is stored in the pair information storage unit 111. Finally, all the key information stored in the key information storage unit 110 in step S49 is deleted, and the process ends.

  Thereafter, direct file transfer between the master terminal 11 and the slave terminal 21 whose terminal address is stored in the pair information storage unit 111 via the wireless network under the control of the terminal information processing units 105 and 205. Is possible.

  As described in detail above, in the second embodiment, the master terminal 11 obtains key information from the slave terminal 21 to determine whether or not pairing between the master terminal 11 and the slave terminal 21 to be connected is possible. The determination is made by collating with the key information of the master terminal 11. Based on the determination result, file transfer is performed with the slave terminal 21 under the control of the master terminal 11.

  Therefore, also in the second embodiment, as in the first embodiment described above, a situation where there are a large number of terminals based on the collation result of the waveform information of the volume pulse wave of the same user. Even under the above, the master terminal 11 and the slave terminal 21 can be reliably paired. Further, when performing pairing, the user only has to contact his / her index fingers to the pulse wave sensors 102 and 202 of the master terminal 11 and slave terminal 21 to be connected almost simultaneously, so that the identification information can be manually input. It is no longer necessary to select a connection partner terminal from a list in which a large number of terminals are registered, thereby greatly reducing the operational burden.

Prior to the key information collating process, a difference between the clock time of the built-in clock of the slave terminal 21 of the transmission source and the clock time of the built-in clock of the master terminal 11 is detected, and the master terminal is based on this difference. The time information included in the key information 21 is corrected. For this reason, even if there is a time lag between the master terminal 11 and the slave terminal 21, it is possible to eliminate the influence and perform the matching process accurately.
Furthermore, according to the second embodiment, it is possible to directly determine whether pairing is possible between terminals without depending on a pairing server, and to perform direct file transfer based on the determination result.

  The present invention is not limited to the above embodiment. For example, by using a capacitive touch panel as an input unit (not shown), the user starts detecting the volume pulse wave by touching the position corresponding to the pulse wave sensor 102 of the touch panel with a finger. The detection operation may be terminated by releasing the finger from the touch panel.

In the second embodiment, the time information correction unit 109, the key information storage unit 110, and the pair information storage unit 111 are provided only in the master terminal 11, but these components are provided in all terminals. All terminals may be able to operate as master terminals as necessary.
In addition, the type and configuration of the terminal, the processing procedure and processing content, the type and configuration of the connection control device, the processing procedure and processing content, and the like can be variously modified without departing from the gist of the present invention. It is.

  In short, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in each embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  11, 21, 101, 201 ... terminal, 102, 202 ... pulse wave sensor, 103, 203 ... key information calculation unit, 108, 208, 304 ... pairing processing unit, 104, 204, 302 ... transmission / reception unit, 111, 305 ... Pair information storage unit, 110, 303 ... Key information storage unit, 105, 205 ... Terminal information processing unit, 107, 207 ... Information display unit, 106, 206 ... File storage unit, 301 ... Pairing server, 109, 306 ... Time information correction unit.

Claims (13)

A terminal-to-terminal connection system that executes a procedure for connecting one-to-one between a first terminal and a second terminal via a wireless line via a connection control device,
The first and second terminals are
A pulse wave sensor for detecting information related to volume pulse waves from a living body part of the same user;
Key information generating means for generating key information including information on the volume pulse wave detected by the pulse wave sensor, and transmitting the generated key information to the connection control device;
The connection control device includes:
Means for receiving key information transmitted from each of the first and second terminals;
Connection possibility determination means for determining whether connection between the first terminal and the second terminal is possible by collating the received key information of the first terminal and key information of the second terminal. When,
An inter-terminal connection system comprising connection control means for controlling connection between the first terminal and the second terminal based on the determination result of the connection possibility. A terminal-to-terminal connection system in which the first terminal executes a procedure for connecting one-to-one between a first terminal and a second terminal via a wireless line,
The first and second terminals are
A pulse wave sensor for detecting information related to the volume pulse wave from the body part of the user;
Key information generating means for generating key information including information related to the volume pulse wave detected by the pulse wave sensor,
The first terminal is
Means for obtaining key information of the second terminal from the second terminal;
A connection permission / non-permission determining unit that determines whether or not a connection with the second terminal is possible by collating the acquired key information of the second terminal with the generated key information of the first terminal; ,
A terminal-to-terminal connection system, comprising: means for controlling connection with the second terminal based on the determination result of the connection possibility. The key information generating means includes
Generating key information including waveform information of the volume pulse wave detected by the pulse wave sensor, time information indicating a detection period of the volume pulse wave, and terminal identification information;
The connection possibility determination means includes
The key information of the first terminal and the key information of the second terminal are respectively calculated as the degree of overlap of time information and the distance between the waveform information of the volume pulse wave, and based on these calculation results The inter-terminal connection system according to claim 1, wherein whether or not connection is possible is determined. The connection possibility determination means includes
It is determined whether or not the common time in which each time information overlaps is equal to or longer than a preset time and the distance between each waveform information of the volume pulse wave is equal to or less than a preset threshold. 4. The inter-terminal connection system according to claim 3, wherein when the condition is satisfied, the first terminal and the second terminal can be connected. The connection possibility determination means includes
A clock means for measuring the internal time;
Prior to the calculation of the degree of overlap of the time information, there is further provided means for correcting the time information included in the key information of the first and second terminals with the internal time measured by the clock means as a reference time. The inter-terminal connection system according to claim 3 or 4, characterized in that The connection possibility determination means includes
Prior to calculating the distance between the waveform information of the volume pulse wave, each waveform information of the volume pulse wave included in the key information of the first and second terminals is based on the maximum value and the minimum value of the waveform information. The inter-terminal connection system according to claim 3 or 4, wherein normalization is performed. The connection possibility determination means includes
The inter-terminal connection system according to claim 6, wherein the normalized waveform information is further subjected to first-order differentiation or second-order differentiation prior to calculation of a distance between the waveform information of the volume pulse waves. The connection possibility determination means includes
Among the waveform information of the volume pulse wave, the number of sampling data of the waveform included in the common time among these waveform information is compared, and if the number of sampling data is the same as a result of the comparison, the number of sampling data is different. In some cases, a means for selecting a smaller number of sampling data as a common number,
For each of the waveform information, means for extracting the sampling data for the common number from the head position as first and second waveform data series;
Between the extracted first waveform data series and the second waveform data series, a square sum of differences between sampling data corresponding in order is calculated, and the calculated square sum is used as the common 5. The inter-terminal connection system according to claim 4, further comprising means for calculating a distance between the waveform information by dividing by the number. Means for calculating the distance between the waveform information of the volume pulse wave,
Means for excluding sampling data by the number corresponding to the phase shift amount from the beginning or end of the first and second waveform data series to generate first and second phase correction data series, respectively;
Between the generated first phase correction data series and the second phase correction data series, a square sum of differences between sampling data corresponding in order is calculated, and the calculated square sum is 9. The inter-terminal connection system according to claim 8, further comprising means for calculating a distance between the waveform information by dividing the common number by a number obtained by subtracting the number of data corresponding to the phase shift amount. . An inter-terminal connection method for executing a procedure for connecting a first terminal and a second terminal in a one-to-one relationship via a wireless line via a connection control device,
A process in which the first and second terminals detect information on volumetric pulse waves from a living body part of the same user by a pulse wave sensor;
The first and second terminals generate key information including information related to the volume pulse wave detected by the pulse wave sensor, and transmit the generated key information to the connection control device;
The connection control device receiving key information transmitted from the first and second terminals, respectively;
The connection control device collates the received key information of the first terminal with the key information of the second terminal, thereby determining whether or not the connection between the first terminal and the second terminal is possible. The process of judging,
A connection method between terminals, wherein the connection control device includes a step of controlling a connection between the first terminal and a second terminal based on a determination result of the connection possibility. A terminal-to-terminal connection method in which the first terminal executes a procedure for connecting one-to-one between a first terminal and a second terminal via a wireless line,
A process in which the first and second terminals detect information related to volumetric pulse waves from a user's body part using a pulse wave sensor;
A process in which the first and second terminals generate key information including information related to the volume pulse wave detected by the pulse wave sensor;
The first terminal obtaining key information of the second terminal from the second terminal;
The first terminal collates the acquired key information of the second terminal with the generated key information of the first terminal, thereby determining whether or not the connection with the second terminal is possible. The process of judging,
A terminal-to-terminal connection method, characterized in that the first terminal includes means for controlling connection with the second terminal based on the determination result of the connection possibility. The process of generating the key information includes:
Generating key information including waveform information of the volume pulse wave detected by the pulse wave sensor, time information indicating a detection period of the volume pulse wave, and terminal identification information;
The process of determining whether or not the connection is possible includes:
The key information of the first terminal and the key information of the second terminal are respectively calculated as the degree of overlap of time information and the distance between the waveform information of the volume pulse wave, and based on these calculation results 12. The inter-terminal connection method according to claim 10 or 11, wherein whether or not connection is possible is determined.   The program which makes the process of each means with which the connection system between terminals in any one of Claims 1 thru | or 3 is provided distribute | distribute to the computer with which the said 1st and 2nd terminal is provided, and the computer with which the said connection control apparatus is provided.

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