JP5710336B2 - Neighboring terminal extraction system, information terminal, control method, and control program - Google Patents

Description

  The present invention relates to a neighboring terminal extraction system, an information terminal, a control method, and a control program.

  In recent years, with the spread of information terminals such as mobile phones, users of information terminals that have visited places where many people gather will inform each other of the existence of nearby information terminals, that is, nearby persons. For this purpose, information for identifying a user is registered in advance with a third-party service organization, and the position of the information terminal of the user is detected by detecting a signal transmitted from the registered information terminal of the user. A user whose information has been acquired and whose current position has been acquired with respect to another user's information terminal registered in advance with the third party service organization, which is present in the vicinity of the current position of the acquired user's information terminal A system for notifying the presence of a nearby user by notifying access information (such as the location information of the user) of the information terminal is known (for example, Patent Document 1).

JP 2004-328308 A

  However, in the system disclosed in Patent Document 1, the position information of the user's information terminal detected in order for a user to know the presence of the information terminal of the other person nearby is a third party service organization. The other person who is near will be sent to the place where the previous user exists based on the information, so that the other person who is nearby will be sent out from among other users When selecting other users who are close to, even if it is rough location information of their information terminal, other users who are not necessarily close will be notified of their location information as much as possible It is also true that there is a desire not to want.

  Regardless of whether or not you are near you, instead of exchanging location information with other users, you can exchange your location information in a broadcast manner in order to efficiently search for nearby users. There is also a desire to do so. Further, among other users, by notifying a user who is searching for a nearby partner by misrepresenting his / her location information, the location information of the user is obtained illegally, and the stalker is confused. There is also a problem that this act is triggered.

  In addition, as a user, there may be situations where you want to keep your location information secret or do not want to be known because of the relationship with privacy etc. Since the location information of the user's information terminal is basically detected and exchanged by the third party service organization, the location information that is not disclosed to the third party service organization is also disclosed. Therefore, it is pointed out that there is a problem in information management in that the third-party service organization grasps all the location information of registered users.

  Therefore, the present invention has been made in view of the above-described conventional problems, and when searching for a user close to his current position from among a plurality of users, both of them are close to each other while hiding the position information completely. It is an object to provide a proximity terminal extraction system, an information terminal, a control method, and a control program that can select users.

In order to solve the above-described problem, the neighboring terminal extraction system according to the present invention as set forth in claim 1 is configured so that an arbitrary digit of the position information of its own terminal composed of a predetermined number string determined in advance is transmitted to another terminal. Among the position information of the other terminal composed of a predetermined terminal and a predetermined number string, a number having the same digit as the arbitrary digit is predetermined from the arbitrary digit. of when within a numerical range, see containing and a other terminals transmitting different digits and the arbitrary digit for the one terminal, the one terminal of the arbitrary in the second terminal When the number of digits different from the digit is within a predetermined numerical range from the same number of digits as the digit different from the arbitrary digit in the one terminal, the other terminal is stored .

  Further, in the neighborhood terminal extraction system according to claim 1, the neighborhood terminal extraction system according to the present invention is characterized in that the arbitrary digits are transmitted in order from the least significant digit in the predetermined digit string. And

  Furthermore, in order to solve the said subject, the information terminal in this invention of Claim 3 is the said measurement means which measures the positional information on the own terminal comprised from the predetermined | prescribed predetermined numerical sequence, and the said measurement Storage means for storing position information, transmission means for transmitting an arbitrary digit of the position information to another terminal, and position information of the other terminal composed of a predetermined number sequence determined in advance. A receiving means for receiving a number different from the arbitrary digit transmitted from the other terminal when the same digit as the arbitrary digit is within a predetermined numerical range from the arbitrary digit; A determination unit that determines whether a number of digits different from the arbitrary digit is within a predetermined numerical range from a number of the same digit as the digit different from the arbitrary digit in the own terminal; and the determination unit Within the predetermined numerical range Characterized in that it comprises a storage means for storing said other terminal that is determined to.

  Further, the information terminal according to the present invention is the information terminal according to claim 3, wherein the transmission unit transmits / receives data to / from the other terminal only with respect to the other terminal stored in the storage unit. It is characterized in that a number having a digit different from any digit that has been performed is transmitted.

And in order to solve the said subject, the control method of the neighboring terminal extraction system in this invention of Claim 5 WHEREIN: One terminal is the position information of the own terminal comprised from the predetermined numerical sequence defined beforehand. Among them, the step of transmitting an arbitrary digit number to another terminal, and the other terminal is the same as the arbitrary digit in the position information of the other terminal constituted by a predetermined number string determined in advance. digit numbers, when from the any number of digits within a predetermined numerical range, see containing and a step of transmitting the arbitrary digit different digits for the one terminal, of the one When the number of digits different from the arbitrary digit in the other terminal is within a predetermined numerical range from the same digit as the digit different from the arbitrary digit in the one terminal, the terminal a step of storing and wherein the free Mukoto.

In order to solve the above-mentioned problem, a control program for a neighboring terminal extraction system according to the present invention described in claim 6 is configured such that one terminal is configured by a predetermined number string in a computer of the neighboring terminal extraction system. Of the position information of the terminal itself, the process of transmitting an arbitrary digit number to the other terminal, and the position information of the other terminal composed of a predetermined number string determined in advance by the other terminal. Among them, when the same digit as the arbitrary digit is within a predetermined numerical range from the arbitrary digit, a process of transmitting a digit different from the arbitrary digit to the one terminal The one terminal has a number of digits different from the arbitrary digit in the other terminal within a predetermined numerical range from the same digit as the digit different from the arbitrary digit in the one terminal. The other terminal Characterized in that to execute the process of storing.

  According to the present invention, when searching for a user who is close to the current position, a neighboring terminal extraction system, an information terminal, a control method, and a control program that can select neighboring users while hiding accurate positional information from each other. Can be obtained.

It is a block diagram which shows the structure of the whole neighboring terminal extraction system in embodiment of this invention. It is a flowchart figure which shows operation | movement of the one terminal in embodiment of this invention. It is a flowchart figure which shows operation | movement of the other terminal in embodiment of this invention. It is a figure explaining determining whether the number of the same digits as the arbitrary digits in one terminal in the embodiment of the present invention is in a predetermined numerical range in other terminals.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified thru | or abbreviate | omitted suitably.

  FIG. 1 is a block diagram showing the configuration of the entire neighboring terminal extraction system in the embodiment of the present invention. In FIG. 1, one information terminal 10 and other information terminals 20 to 23 such as a mobile phone, a PDA (Personal Digital Assistant), a portable personal computer, etc. receive radio waves from GPS (Global Positioning System) and From the location information measuring units 110 and 210 that measure the current location information, the transmission units 120 and 220 that transmit information related to the location information of the information terminal to the partner information terminal, and the partner information terminal Based on the information on the position information transmitted from the receiving units 130 and 230 that receive information on the position information transmitted from the other party and the information terminal on the other side, the information terminal on the other side Determination units 150 and 250 for determining whether or not the information terminal includes position information of its own information terminal, position information of a partner information terminal existing in the vicinity of its own information terminal, and And a storage storing unit 140 and 240 Prefecture. Although not shown, when the location information of the own terminal is stored and transmitted, or when the location information of the counterpart terminal is received and stored, it is converted into a code value such as binary, quaternary, or octal. An encoding unit may be further provided.

  The position information may be measured by the GPS described above, or the position information of the terminal itself may be registered in advance on the desktop, and there is no particular limitation. In FIG. 1, only four units 20 to 23 are listed as other information terminals, but the number of other information terminals is not limited to four, and other information of any number It is assumed that a plurality of terminals exist near or far from one information terminal 10.

Next, the operation of one information terminal 10 in the embodiment of the present invention will be described. FIG. 2 is a flowchart showing the operation of one information terminal in the embodiment of the present invention. In the description of FIG. 2, another as a prerequisite, the user of one information terminal 10 to search for other information terminals 20 to 23 are in the vicinity of U _0, sediment or near remote user U _0, which from now neighbor search is done and the set of the information terminal 20 to 23 of the user and uset, with the current position P _u0 of the user U ₀ was survey by GPS or the like represented by two-dimensional (XY) coordinates, the current position represented by the XY coordinates, each Decompose every digit for each coordinate. For example, when P _u0 = (13,65), the _{P u0x10 = 1, P u0x01 =} 3, P u0y10 = 6, P u0y01 = 5. Then, it is assumed that the set of U ₀ acquaintance users is set to Uset, and P _u0x01 is broadcasted to _Uset .

In FIG. 2, first, one information terminal 10 initializes a user set Uset (step (hereinafter referred to as “S”) 20), and with respect to Ua belonging to the user set Uset of another information terminal, P _u0x01 = 3, which is the least significant digit of the current position X, is transmitted (S21). Then, from Ua belonging to user set uset, from among the represented current position in the XY coordinates Ua is present, receives the P _Uay01 the least significant digit of the current position Y of Ua (S22). The one information terminal 10 determines whether or not there is a possibility that another information terminal Ua is in the vicinity of the own terminal based on the received _Puay01 in the determination unit 150 (S23). When it is determined that there is a high possibility of being present (S23: Yes), the process proceeds to S25, where the user set Uset is updated to leave another information terminal (Ua) and may exist in the vicinity. If it is determined that it is not high (S23: No), the process proceeds to S24, and the other information terminal (Ua) that has transmitted _Puay01 is _removed from the user set Uset. The determination method in S23 will be described later.

Subsequently, in S26, it is determined whether or not _Puay , which is the digit of the current position Y of the other information terminal, has been received from all the user sets Uset (S26). _If the reception of _Pay , which is the digit of the current position Y, is not completed (S26: No), the process returns to S22. When the reception of _Puay , which is the digit of the current position Y of another information terminal from all user sets Uset, is completed (S26: Yes), the _{process proceeds} to S27. Here, assuming that there is no response from other information terminals belonging to the Uset, it may be determined that all _Puays have been received when there is no response for a predetermined time.

  In S27, it is determined whether one information terminal 10 and another information terminal Ua of the user set Uset are sufficiently close to each other, and if it is determined that they are sufficiently close, that is, one information terminal 10 When it is determined that transmission / reception has been completed up to the most significant digit of the position coordinates in both the information terminal and the other information terminal (S27: Yes), the process ends, and when it cannot be determined that it is sufficiently close ( S27: No), the process proceeds to S28. Also, the process ends when the Use is empty (that is, there is no other party to transmit). That is, in the case of S27: No, it means that there are still many other information terminal candidates that belong to the user set Uset and are considered to be in the vicinity position with one information terminal. The determination method in S27 will be described later.

Further, in order to narrow down other information terminals Ua in the vicinity from one information terminal 10, in S28, the current position X of the current terminal X of the own terminal is compared with the set Uset of users of other information terminals remaining. The next lower digit, P _u0x10 = 1, is transmitted. In S29, Puay10, which is the next lower digit of the current position Y of the other information terminal Ua, from the current position represented by the XY coordinates where the remaining information terminal Ua is present from the user set _Uset. Is returned to the process of S23, and the information terminal 10 determines whether there is another remaining information terminal in the vicinity of its own terminal based on the received _Puay10 in the determination unit 150. Determine whether or not.

Next, operations of other information terminals 20 to 23 in the embodiment of the present invention will be described. FIG. 3 is a flowchart showing the operation of another terminal in the embodiment of the present invention. In the description of FIG. 3, the preconditions are the same as those in FIG. In S31, the other information terminals 20 to 23 receive P _u0x10 = 1 which is the lower digit of the current position X of the one information terminal 10 from the user U ₀ of the one information terminal 10. In S32, the other information terminals 20 to 23 determine whether or not the own terminal is likely to be in the vicinity of the one information terminal 10 in the determination unit 250 based on the received _Pu0x10 . If it is determined that there is a high possibility of being in the vicinity (S32: Yes), the process proceeds to S33, and other information is selected from the current position represented by the XY coordinates where the other information terminals 20 to 23 are located. If it is determined that the next lower digit of the current position Y of the terminal is transmitted and remains as the user set Uset and is not likely to exist in the vicinity (S32: No), the process proceeds to S34. Whether or not to send the information indicating that the user is not in the vicinity of one information terminal 10 (non-neighbor) without dropping the next lower digit of the current position Y of the other information terminals 20 to 23 Or in the vicinity of one information terminal 10 And exit a timeout without sending a message indicating no. The determination method in S32 will be described later.

2 and 3, the current position P _u0 of the user U ₀ of one information terminal 10 has been described by two-dimensional (XY) coordinates, but represents the current position P _u0 of the user U _0. However, it is not necessarily two-dimensional, and may be one-dimensional, and of course, it may be three-dimensional as long as height information can be obtained as position information.

  Here, when determining whether or not there is a proximity relationship between one information terminal 10 and the other information terminals 20 to 23 (S23 in FIG. 2, S27, S32 in FIG. 3), the lowest position in the XY coordinates The point of narrowing down other information terminals in the proximity relationship by transmitting digits will be described in detail with reference to FIG. FIG. 4 is a diagram for explaining whether or not a number having the same digit as an arbitrary digit in one terminal in the embodiment of the present invention is within a predetermined numerical range in another terminal.

Now, the current position P _u0 of the user U ₀ of the information terminal 10, assuming P _u0 = a (supplies 13, 65), the current position represented by the XY coordinates, decomposes each _coordinate, P u0x = 13, a _P u0y = 65, one information terminal 10, for the set uset = 100 units other information terminal of the user by transmitting the current position P _u0 = (13,65) of the terminal, Assume that another information terminal located at a distance of 3 or less is searched for as another information terminal in a proximity relationship. In this way, the current location of the own terminal is known to all 100 other information terminals, and both the one information terminal and the other information terminal conceal complete location information, This is contrary to the gist of the present invention of gradually sorting the screens.

Therefore, as described in the description of FIG. 2, first, P _u0x01 = 3, which is the least significant digit of the current position X of the terminal, is transmitted, so that another position at a distance of 3 or less from P _u0x01 = 3. When it is determined that the information terminal is an information terminal in the proximity relationship, as shown by the hatched portion in FIG. 4B, the position at a distance 3 or less from P _u0x01 = 3 is X = 0 to 0. Within a very wide range of 6, 10-16, 20-26, 30-36, 40-46, 50-56, 60-66, 70-76, 80-86, 90-96, 70% range, Since there is one information terminal, one information terminal 10 is indeed X = 0 to 6, 10 to 16, 20 to 26, 30 to 36, 40 to 46, 50 to 56, 60 to 66, Which range is 70 to 76, 80 to 86, 90 to 96 Less likely to borrow, anonymity is very high. And, in order to narrow down the neighboring terminals for other information terminals P _ua that are considered to be in a proximity relationship with one information terminal, another information terminal is selected from the current position represented by the XY coordinates where the other information terminal is located. By sending _Puay01 which is the least significant digit of current position Y with anonymity located in the same wide range of Ua, it is further shaken in one information terminal 10, and finally it is really a neighborhood relationship The other information terminal Ua at is searched. In this way, detailed position information is gradually exchanged while maintaining anonymity.

Next, when transmitting a _P u0x10 = 1 is the next lower digit of the current position X of the terminal P _u0, it will be known only to the user a limited a _P u0x = 13. If this is the case, first, if P _u0x10 = 1, which is the least significant digit of the current position X of the terminal, is transmitted, the position at a distance of 3 or less is as narrow as 16% of X = 7-22. You are known to be in the area. For this reason, transmission is performed from the least significant digit.

  By performing such processing, it is possible to gradually shake away users who are not likely to be close to each other, and even if users of other information terminals transmit false location information, finally Since it is shaken off in the process of one information terminal (S23, S27 in FIG. 2), the position information of the one information terminal cannot be known from the other information terminals, and the nearest terminal is searched. The user of the other information terminal that has been screened in the middle is given only very rough position information with many possibilities as to the position information of the user of one information terminal. The same applies to the case where the false position information is transmitted from one information terminal (it is shaken off in the processing of other information terminals (S32 in FIG. 3)).

As described above, according to the present invention, the user U ₀ of one information terminal 10 uses all the users who are acquainted with the adjacent possibility user Uset as an initial value, performs the adjacent determination, and gradually reduces the use. As long as the user Ua of the other information terminal belonging to the network receives the broadcast distribution from U ₀ in the receiving unit 230 (FIG. 1) as an initial value for the adjacency user Uset, and continues to pass the adjacency determination, Is continuously set to U ₀ . Then, the transmission from the lower digit by (i.e., transmits to the first. The P _U0x01 than _P u0x10) that, from a state in which there is likely to be located in a wide range as the position information, that gradually narrow down It can be done. In the above description, the case where the current position represented by the coordinate value is transmitted / received from the lower digit constituting each coordinate value is described. Of course, it is also possible to carry out.

  Moreover, in this embodiment, although the example which performs communication between the one information terminal 10 and the other information terminals 20-23 via radio | wireless is demonstrated, a communication means is not necessarily restricted to radio | wireless, Of course, other communication means may be used.

  The series of operations shown in FIGS. 2 and 3 are not shown by a CPU (Central Processing Unit) (not shown) provided in a control unit (not shown) of one information terminal 10 and other information terminals 20-23. This is performed by executing a program stored in the storage units 140 and 240 including a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.

  The present invention has been described above by the preferred embodiments of the present invention. While the invention has been described with reference to specific embodiments thereof, various modifications and changes can be made to these embodiments without departing from the broader spirit and scope of the invention as defined in the claims. is there.

10 one information terminal 110, 210 position information measuring unit 120, 220 transmitting unit 130, 230 receiving unit 140, 240 position information, other terminal storage unit 150, 250 determining unit 100 neighboring terminal extraction system 20, 21, 22, 23, etc. Information terminals

Claims (6)

One terminal that transmits an arbitrary digit number to other terminals among the position information of its own terminal composed of a predetermined number string determined in advance;
Of the position information of the other terminal composed of a predetermined number sequence determined in advance, the number of the same digit as the arbitrary digit is within the predetermined numerical range from the number of the arbitrary digit. Another terminal that transmits a number of digits different from the other terminal to the one terminal;
Only including,
The one terminal is configured such that when a number different from the arbitrary digit in the other terminal is within a predetermined numerical range from a number different from the arbitrary digit in the one terminal. A neighboring terminal extraction system that stores other terminals .   The neighboring terminal extraction system according to claim 1, wherein the arbitrary digit is transmitted in order from the lowest digit in the predetermined number string. Measuring means for measuring the position information of the terminal composed of a predetermined number sequence determined in advance;
Storage means for storing the measured position information;
Transmitting means for transmitting an arbitrary digit of the position information to another terminal;
When the number of the same digit as the arbitrary digit is within the predetermined numerical value range from the arbitrary digit among the position information of the other terminal constituted by a predetermined number string determined in advance, the other terminal Receiving means for receiving a number of digits different from the arbitrary digit transmitted from:
A determination means for determining whether a digit of a digit different from the arbitrary digit is within a predetermined numerical range from a digit of the same digit as the digit different from the arbitrary digit in the terminal;
Storage means for storing the other terminal determined to be within the predetermined numerical range by the determination means;
Information terminal characterized by including.   The transmission means transmits a number of digits different from any digits previously transmitted / received to / from the other terminal only to the other terminal stored in the storage means. The information terminal according to claim 3. A step in which one terminal transmits an arbitrary digit number to the other terminal among the position information of the terminal composed of a predetermined number sequence determined in advance;
Among the position information of the other terminal constituted by a predetermined number string determined in advance by another terminal, the same digit as the arbitrary digit is within a predetermined numerical range from the arbitrary digit. A step of transmitting a number of digits different from the arbitrary digit to the one terminal;
Only including,
The one terminal is configured such that when a number different from the arbitrary digit in the other terminal is within a predetermined numerical range from a number different from the arbitrary digit in the one terminal. the method of near terminal extraction system, characterized in including Mukoto the step of storing the other terminals. In the computer of the nearby terminal extraction system,
A process in which one terminal transmits an arbitrary digit number to the other terminal among the position information of the terminal composed of a predetermined number string determined in advance;
Among the position information of the other terminal constituted by a predetermined number string determined in advance by another terminal, the same digit as the arbitrary digit is within a predetermined numerical range from the arbitrary digit. A process of transmitting a number of digits different from the arbitrary digit to the one terminal;
And execute
When the one terminal has a number of digits different from the arbitrary digit in the other terminal within a predetermined numerical range from the same digit as the digit different from the arbitrary digit in the one terminal, A control program for executing processing for storing other terminals .

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