JP2019054477A - Communication arbitration apparatus, program for causing a computer to execute, computer readable recording medium having recorded program, and data structure - Google Patents

Abstract

To provide a communication arbitration apparatus which arbitrates communication conditions of a secondary user so as to avoid interference between wireless communication of a primary user and wireless communication of the secondary user.SOLUTION: A communication arbitration apparatus 1 includes: determination means 14; and arbitration means 15. The determination means 14 determines whether secondary user's wireless communication interferes with primary user's wireless communication on the basis of a communication range of the primary user and a communication range of the secondary user and outputs the determination result to the arbitration means 15. The arbitration means 15 arbitrates a communication conditions of the wireless communication of the secondary user on the basis of the determination result received from the determination means 14 so as to avoid interference between the wireless communication of the primary user and the wireless communication of the secondary user determined to be mutually interfered.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a communication arbitration apparatus, a program for causing a computer to execute, a computer-readable recording medium storing the program, and a data structure.

  In order to satisfy various communication performance requirements in the fifth generation mobile communication system, additional frequency resources are required. Among them, a technique for sharing a frequency that is not used in time and place is attracting attention (Non-Patent Document 1). In order to share the frequency, it is necessary to sequentially grasp the usage status of the primary user so as not to interfere with the existing wireless system (primary user). On the other hand, a system that estimates the usage status (power distribution) of a primary user using a mobile device as a sensor terminal has been proposed (Non-Patent Document 2). In addition, in order to reduce the amount of data when the mobile device sends data to the server, a data aggregation method using passing communication of the mobile device has also been proposed (Non-Patent Document 3).

Ministry of Internal Affairs and Communications, “Radio Policy 2020 Roundtable Report”, June 2016. Matsuno, et al., "Efforts for frequency sharing between different radio systems in 5th generation mobile communication systems," IEICE Tech., RCS116, Oct. 2016. Tamai, et al., “Inter-terminal data collection method for reducing cellular communication load in participatory sensing,” Proc. 24th Multimedia Communication and Distributed Processing Workshop, pp.84-91, Oct. 2016.

  However, in the conventional technology that shares the frequency, the secondary user side determines communication conditions that do not interfere with the primary user, and the communication of the secondary user so as not to interfere with the primary user. There is no mediation of conditions. As a result, it is difficult to avoid interference between the primary user's wireless communication and the secondary user's wireless communication.

  Therefore, according to an embodiment of the present invention, a communication arbitration device that arbitrates secondary user communication conditions so as to avoid interference between primary user radio communication and secondary user radio communication is provided. To do.

  In addition, according to the embodiment of the present invention, the computer executes mediation of the communication conditions of the secondary user so as to avoid interference between the wireless communication of the primary user and the wireless communication of the secondary user. Provide a program.

  Furthermore, according to the embodiment of the present invention, to cause the computer to adjust the communication condition of the secondary user so as to avoid interference between the primary user's wireless communication and the secondary user's wireless communication. A computer-readable recording medium on which the program is recorded is provided.

  Furthermore, according to the embodiment of the present invention, there is provided a data structure for arbitrating secondary user communication conditions so as to avoid interference between primary user wireless communication and secondary user wireless communication. provide.

(Configuration 1)
According to the embodiment of the present invention, the communication arbitration device includes a determination unit and an arbitration unit. The determination means determines whether or not the secondary user's wireless communication interferes with the primary user's wireless communication based on the primary user's communication range and the secondary user's communication range. The arbitration unit avoids interference between the primary user's wireless communication and the secondary user's wireless communication when the determination unit determines that the wireless communication of the secondary user interferes with the wireless communication of the primary user. As such, the communication conditions of the secondary user's wireless communication are arbitrated.

(Configuration 2)
In Configuration 1, it is parallel to a straight line connecting the center of the communication range of the primary user and the center of the communication range of the secondary user, and the secondary user's communication from the center of the communication range of the primary user. The distance from the center of the primary user's communication range to the line defining the primary user's communication range in the direction toward the center of the communication range is the first distance, parallel to the straight line, and secondary usage The second distance is the distance from the center of the secondary user's communication range to the line defining the secondary user's communication range in the direction from the center of the user's communication range to the center of the primary user's communication range. When the distance between the center of the communication range of the primary user and the center of the communication range of the secondary user is the third distance, the determination unit is configured such that the third distance is equal to the first distance and the second distance. A first determination process for determining whether or not the sum is less than or equal to the distance is performed. Te, third distance is, when it is determined to be less than the sum of the first distance and the second distance, secondary use of the wireless communication is judged to interfere with the radio communication of the primary user.

(Configuration 3)
In Configuration 2, the determination unit determines whether or not the first frequency band used for the wireless communication of the primary user and the second frequency band used for the wireless communication of the secondary user overlap at least partially. A second determination process is further performed. In the first determination process, it is determined that the third distance is less than or equal to the sum of the first distance and the second distance, and the second determination process. When it is determined that the first frequency band and the second frequency band overlap at least partially, it is determined that the secondary user's wireless communication interferes with the primary user's wireless communication.

(Configuration 4)
In the configuration 2 or the configuration 3, the first distance is a radius of a circle that defines the communication range of the primary user, and the second distance is a radius of the circle that defines the communication range of the secondary user. .

(Configuration 5)
In any one of Configurations 1 to 4, the center of the communication range of the primary user is parallel to a straight line connecting the center of the communication range of the primary user and the center of the communication range of the secondary user. The distance from the center of the primary user's communication range to the line defining the primary user's communication range in the direction from the center to the secondary user's communication range is the first distance and is parallel to the straight line And the distance from the center of the secondary user communication range to the line defining the secondary user communication range in the direction from the center of the secondary user communication range to the center of the primary user communication range. Is the second distance, and the third distance is the distance between the center of the communication range of the primary user and the center of the communication range of the secondary user. It is determined whether or not it is less than or equal to the sum of the distance and the second distance, and according to the determination result The secondary user's wireless communication is stopped by either adjusting the transmission power in the secondary user's wireless communication or adjusting the directivity of the radio wave in the secondary user's wireless communication. Arbitrate the conditions.

(Configuration 6)
In the configuration 5, when the arbitration unit determines that the third distance is equal to or less than the sum of the first distance and the second distance, the wireless communication of the secondary user is stopped by stopping the wireless communication of the secondary user. When the communication conditions of communication are arbitrated and it is determined that the third distance is not less than or equal to the sum of the first distance and the second distance, the trajectory of the primary user's communication range is the secondary user's It is further determined whether or not it passes through the center of the communication range, and in accordance with the determination result, adjustment of transmission power in the secondary user's wireless communication and adjustment of radio wave directivity in the secondary user's wireless communication The communication condition of the secondary user's wireless communication is arbitrated by either.

(Configuration 7)
In the configuration 6, when the arbitration unit determines that the trajectory of the primary user's communication range passes through the center of the secondary user's communication range, the arbitration unit sets 2 by adjusting the transmission power in the secondary user's wireless communication. When the communication condition of the secondary user's wireless communication is arbitrated and it is determined that the trajectory of the primary user's communication range does not pass through the center of the secondary user's communication range, the secondary user's wireless communication The communication condition of the secondary user's wireless communication is adjusted by adjusting the directivity of the radio wave.

(Configuration 8)
In the configuration 6 or the configuration 7, the arbitration unit performs the wireless communication of the secondary user by either adjusting the transmission power in the wireless communication of the secondary user or adjusting the directivity of the radio wave in the wireless communication of the secondary user. When the communication condition is adjusted, the secondary user is further adjusted to multi-hop wireless communication so that the secondary user can perform wireless communication sharing the frequency band with the primary user. When the communication condition of the secondary user's wireless communication is arbitrated by the stop, the secondary user is further arbitrated so that the secondary user can perform wireless communication sharing the frequency band with the primary user by changing the wireless communication network.

(Configuration 9)
Further, according to the embodiment of the present invention, the program determines whether the determination means uses the primary user's wireless communication based on the primary user's communication range and the secondary user's communication range. A first step of determining whether or not to interfere with the user's wireless communication, and the arbitrating means when the determining means determines that the secondary user's wireless communication interferes with the primary user's wireless communication A program for causing a computer to execute a second step of arbitrating communication conditions of secondary user wireless communication so as to avoid interference between the user wireless communication and the secondary user wireless communication.

(Configuration 10)
In Configuration 9, it is parallel to a straight line connecting the center of the primary user's communication range and the center of the secondary user's communication range, and the secondary user's communication range from the center of the primary user's communication range. The distance from the center of the primary user's communication range to the line defining the primary user's communication range in the direction toward the center of the communication range is the first distance, parallel to the straight line, and secondary usage The second distance is the distance from the center of the secondary user's communication range to the line defining the secondary user's communication range in the direction from the center of the user's communication range to the center of the primary user's communication range. When the distance between the center of the communication range of the primary user and the center of the communication range of the secondary user is the third distance,
In the first step, the determination means performs a first determination process for determining whether or not the third distance is equal to or less than the sum of the first distance and the second distance, and the first determination process When it is determined that the third distance is less than or equal to the sum of the first distance and the second distance, it is determined that the secondary user's wireless communication interferes with the primary user's wireless communication.

(Configuration 11)
In Configuration 10, in the first step, the determination means includes at least a part of the first frequency band used for the primary user's wireless communication and the second frequency band used for the secondary user's wireless communication. And a second determination process for determining whether or not the first distance and the second distance are overlapped. In the first determination process, it is determined that the third distance is equal to or less than the sum of the first distance and the second distance; and In the second determination process, when it is determined that the first frequency band and the second frequency band overlap at least partially, it is determined that the secondary user's wireless communication interferes with the primary user's wireless communication. To do.

(Configuration 12)
In the configuration 10 or the configuration 11, the first distance is a radius of a circle that defines the communication range of the primary user, and the second distance is a radius of the circle that defines the communication range of the secondary user. .

(Configuration 13)
In any one of Configurations 9 to 12, the center of the communication range of the primary user is parallel to a straight line connecting the center of the communication range of the primary user and the center of the communication range of the secondary user. The distance from the center of the primary user's communication range to the line defining the primary user's communication range in the direction from the center to the secondary user's communication range is the first distance and is parallel to the straight line And the distance from the center of the secondary user communication range to the line defining the secondary user communication range in the direction from the center of the secondary user communication range to the center of the primary user communication range. Is the second distance, and the distance between the center of the primary user communication range and the center of the secondary user communication range is the third distance,
In the second step, the arbitration means determines whether or not the third distance is equal to or less than the sum of the first distance and the second distance, and the secondary user's The communication condition of the secondary user's wireless communication is adjusted by either stopping the wireless communication or adjusting the transmission power in the secondary user's wireless communication and adjusting the directivity of the radio wave in the secondary user's wireless communication.

(Configuration 14)
In the configuration 13, in the second step, the arbitration unit determines that the third distance is equal to or less than the sum of the first distance and the second distance, and stops the wireless communication of the secondary user. When the communication condition of the secondary user's wireless communication is arbitrated and it is determined that the third distance is not less than or equal to the sum of the first distance and the second distance, the trajectory of the communication range of the primary user Further determines whether or not passes through the center of the communication range of the secondary user, and according to the determination result, adjustment of transmission power in the secondary user's wireless communication and radio wave in the secondary user's wireless communication The communication condition of the secondary user's wireless communication is arbitrated by either of the directivity adjustments.

(Configuration 15)
In the configuration 14, when the arbitrating unit determines in the second step that the trajectory of the communication range of the primary user passes through the center of the communication range of the secondary user, in the secondary user's wireless communication When the communication condition of the secondary user's wireless communication is adjusted by adjusting the transmission power, and it is determined that the trajectory of the primary user's communication range does not pass through the center of the secondary user's communication range, The communication conditions of the secondary user's wireless communication are adjusted by adjusting the directivity of the radio wave in the user's wireless communication.

(Configuration 16)
In the configuration 14 or the configuration 15, in the second step, the arbitration unit performs the secondary operation by adjusting the transmission power in the secondary user's wireless communication or adjusting the directivity of the radio wave in the secondary user's wireless communication. When the communication condition of the user's wireless communication is arbitrated, the secondary user can arbitrate so that the secondary user can perform radio communication sharing the frequency band with the primary user by changing to multi-hop wireless communication. When the communication condition of the secondary user's wireless communication is adjusted by stopping the wireless communication of the user, the secondary user can perform wireless communication sharing the frequency band with the primary user by changing the wireless communication network. To mediate.

(Configuration 17)
Furthermore, according to the embodiment of the present invention, the recording medium is a computer-readable recording medium in which the program according to any one of Configurations 9 to 16 is recorded.

(Configuration 18)
Further, according to the embodiment of the present invention, the data structure includes p transmission powers of p (p is a positive integer) primary users and q (q is a positive integer) secondarys. Q position information of users, q received power of radio waves detected by q secondary users, q antenna gains of q secondary users, and q secondary powers It is a data structure including q transmission powers of users, and q position information and q reception powers are 1 consisting of a weighted average of q pieces of position information whose reception power is weighted by the calculation means. It is used to calculate the position of the next user, and the q pieces of position information and the position of the primary user are calculated by the calculation means by the center of the communication range of the primary user and q pieces of q secondary users. Is used to calculate the distance from the center of the communication range, and p transmission power and q reception power are calculated by the calculation means of p primary users. Q antenna gains and q transmission powers are used to calculate q communication ranges of q secondary users, and q antenna gains and q transmission powers are used to calculate q communication ranges. , P communication ranges and q communication ranges, the determination means determines whether the distance is less than or equal to the sum of any of the p communication ranges and the q communication ranges that interfere with each other The determination means is less than the sum of any of the p communication ranges and the q communication ranges whose distances interfere with each other in the first determination process. When it is determined that there is, it is determined that the primary user's wireless communication and the secondary user's wireless communication interfere with each other.

(Configuration 19)
In Configuration 18, each of the p communication ranges and the q communication ranges includes a radius of the communication range having a circular shape.

(Configuration 20)
In the configuration 18 or the configuration 19, the distance, the p communication ranges, and the q communication ranges are further set such that the arbitration unit avoids interference between the primary user's wireless communication and the secondary user's wireless communication. Used to mediate communication conditions for secondary users' wireless communication.

(Configuration 21)
In any one of Configurations 18 to 20, the data structure further includes p frequency bands of radio waves transmitted from p primary users and q of radio waves transmitted from q secondary users. Whether or not p frequency bands and q frequency bands include at least a part of any one of the p frequency bands and any of the q frequency bands. Is used to further execute a second determination process for determining whether one of the p communication ranges and one of the q communication ranges whose distances interfere with each other in the first determination process. Wireless communication of the primary user when it is determined that the sum is less than or equal to and at least a part of any of the p frequency bands and any of the q frequency bands overlaps in the second determination process And secondary user wireless communication There determines that interfere with each other.

  The secondary user can perform wireless communication while avoiding interference between the wireless communication of the primary user and the wireless communication of the secondary user.

1 is a schematic diagram of a radio communication system according to an embodiment of the present invention. It is the schematic of the communication arbitration apparatus shown in FIG. It is a figure which shows the relationship between received power and the distance from a wave source. It is a conceptual diagram of the table | surface which shows the estimation result of the power condition of a primary user. It is the schematic of the table | surface which shows the determination information of a secondary user. It is a figure for demonstrating the method of determining whether radio communication of a primary user and radio communication of a secondary user interfere. It is a figure for demonstrating another method of determining whether radio communication of a primary user and radio communication of a secondary user interfere. It is a figure for demonstrating another method of determining whether radio communication of a primary user and radio communication of a secondary user interfere. It is a conceptual diagram of the table | surface which shows the determination result of the presence or absence of interference with a primary user's radio | wireless communication and a secondary user's radio | wireless communication. It is a figure for demonstrating the method of mediating a communication condition of a secondary user. It is a figure for demonstrating the method of mediating a communication condition of a secondary user. It is a schematic diagram which shows the change of the communication method of a secondary user. It is a flowchart for demonstrating operation | movement of the communication arbitration apparatus shown in FIG. It is a flowchart for demonstrating the detailed operation | movement of step S1 shown in FIG. It is a flowchart for demonstrating the detailed operation | movement of step S2 shown in FIG. It is a figure which shows another shape of the other communication range of a primary user and a secondary user. It is a figure for demonstrating the parameter | index which shows the communication range of a primary user and a secondary user in case the communication range of a primary user and a secondary user has arbitrary shapes. It is the schematic which shows the data structure by embodiment of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

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

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

  The communication arbitration device 1 is connected to the base station 3 via a wired cable 8. The communication arbitration device 1 receives terminal information including position information and radio wave reception power at each of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7 from the base station 3 via the wired cable 8. To do.

  Then, the communication arbitration device 1 determines whether or not the secondary user's wireless communication interferes with the primary user's wireless communication by a method to be described later based on the plurality of terminal information. When it is determined that the secondary user's wireless communication interferes with the primary user's wireless communication, the communication arbitration device 1 performs the primary user's wireless communication and the secondary user's wireless communication with each other by a method described later. The communication conditions of the secondary user's wireless communication are arbitrated so as to avoid interference.

Each of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 periodically uses positional information [x _i , y _i ] (i) that indicates its own position using GPS (Global Positioning System). Is a positive integer) and detects the frequency band bw_S, the lower limit frequency f_S_low and the received power RSSI _i when the radio wave from the wave source S is received, and the frequency band bw_S, the lower limit frequency f_S_low and the received power RSSI _i The time t _i at the time is detected. In addition, each of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 performs position information [x _i , y _i ], transmission start time t_start, transmission time t_RF, and transmission when performing wireless communication. The power POW_t, the frequency band bw_C, and the lower limit frequency f_C_low are detected.

In the position information [x _i , y _i ], x _i represents longitude, and y _i represents latitude. Time _{t i} and the transmission start time t_start is represented by YYYY / MM / DD / h / m / s, transmission time t_RF is represented by h / m / s.

Each of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 includes its own identification information ID _i , position information [x _i , y _i ], frequency band bw_S _i , lower limit frequency f_S_low _i , received power RSSI _i, and the terminal includes a time _{t i} information _{iNFO_i = [ID i / [x} i, y i] / bw_S i / f_S_low i / RSSI i / t i] generates, the generated terminal information info_I = [ID _i / [x _i , y _i ] / bw_S _i / f_S_low _i / RSSI _i / t _i ] is transmitted to the base station 3 (or the base station 4).

Also, each of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7, when performing wireless communication, has its own identification information ID _i , its own transmission antenna gain g _i , and position information [x _{i, y i],} the transmission start time t_start _i, transmission time t_RF _i, transmit power POW_t _i, communication information _{COM_i = [ID i / g i} / [x i including a frequency band Bw_C _i and lower frequency f_C_low _{i, y i} ] _/ t_start _i / generate _{t_RF i / POW_t i / bw_C i} / f_C_low i], the communication information and the generated _{COM_i = [ID i / g i} / [x i, y i] / t_start i / t_RF i / POW_t _i / bw_C _i / f_C_low _i ] is transmitted to the base station 3 (or the base station 4).

  Each of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 receives communication conditions adjusted from the communication arbitration device 1 via the base station 3 (or the base station 4). Then, for example, the plurality of terminal devices 2 and the plurality of robots 7 perform wireless communication at the shared frequency f1 in the region REG1 based on the received communication conditions, and the plurality of terminal devices 2 and the sensors 5 have received the reception. Based on the communication conditions, wireless communication is performed at the shared frequency f2 in the region REG2. The shared frequency f1 may be the same as or different from the shared frequency f2.

  The base station 3 receives terminal information INFO_i and communication information COM_i from each of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7, and the received terminal information INFO_i and communication information COM_i are transmitted to the wired cable 8 Is transmitted to the communication arbitration device 1. Further, the base station 3 receives the terminal information INFO_i and the communication information COM_i from the base station 4 and transmits the received terminal information INFO_i and communication information COM_i to the communication arbitration device 1 via the wired cable 8.

  The base station 4 receives terminal information INFO_i and communication information COM_i from each of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7, and transmits the received terminal information INFO_i and communication information COM_i to the wired cable ( (Not shown) to the base station 3.

  FIG. 2 is a schematic diagram of the communication arbitration device 1 shown in FIG. With reference to FIG. 2, the communication arbitration device 1 includes a reception unit 11, a storage unit 12, a creation unit 13, a determination unit 14, an arbitration unit 15, and a transmission unit 16.

  The receiving unit 11 receives the terminal information INFO_i and the communication information COM_i from the base station 3 via the wired cable 8 and stores the received terminal information INFO_i and the communication information COM_i in the storage unit 12.

  The storage unit 12 stores the terminal information INFO_i and the communication information COM_i received from the reception unit 11.

  The creation unit 13 estimates the power distribution of the primary user based on the terminal information INFO_i stored in the storage unit 12 by a method described later, and stores the estimated power distribution estimation result in the storage unit 12.

  Further, the creation means 13 creates decision information related to the secondary user's wireless communication based on the communication information COM_i stored in the storage means 12 by a method described later, and stores the created decision information in the storage means 12. Store.

  Based on the primary user power distribution estimation result and secondary user determination information stored in the storage unit 12, the determination unit 14 performs wireless communication between the primary user and the secondary user by a method described later. It is determined whether or not the wireless communication interferes, and the determination result is output to the arbitration unit 15.

  The arbitration unit 15 receives the determination result of the presence or absence of interference from the determination unit 14. Based on the determination result, the primary user power distribution estimation result and the secondary user determination information stored in the storage unit 12, the arbitration unit 15 performs the primary user's The communication conditions of the secondary user are arbitrated so as to avoid interference between the wireless communication and the secondary user's wireless communication. Then, the arbitration unit 15 outputs the arbitration result to the transmission unit 16.

  The transmission unit 16 receives the arbitration result from the arbitration unit 15, and receives the arbitration result via the wired cable 8 and the base station 3 (and the base station 4), a plurality of terminal devices 2, 6, a plurality of sensors 5, and a plurality of units. To the robot 7.

A method for estimating the power distribution of the primary user will be described. The creation unit 13 reads a plurality of terminal information INFO_i from the storage unit 12, and based on the plurality of pieces of position information [x _i , y _i ] and the plurality of received power RSSI _i included in the read plurality of terminal information INFO_i. Estimate the position.

  A method for estimating the wave source position will be described.

The creation means 13 calculates the center of gravity [x _G , y _G ] of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 by the following formula.

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

The creation unit 13 estimates the center of gravity _(x G, _{y G)} were calculated by the formula (1) as wave source position. That is, the creation unit 13 estimates the center of gravity [x _G , y _G ] of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 weighted by the received power RSSI _i as the wave source position.

  FIG. 3 is a diagram illustrating the relationship between the received power and the distance from the wave source. In FIG. 3, the vertical axis represents the received power, and the horizontal axis represents the distance from the wave source S.

Referring to FIG. 3, received power RSSI _i attenuates in inverse proportion to the distance from wave source S. As a result, the received power RSSI _i increases as it approaches the wave source S, so that the weighting effect by the received power RSSI _i is greater in the vicinity of the wave source S. Therefore, the estimated value estimated by the estimation method using the center of gravity [x _G , y _G ] as the wave source position approaches the vicinity of the wave source.

When the generation unit 13 estimates the wave source position [x _G , y _G ], the creation unit 13 estimates the communication range of the primary user using the estimated wave source position [x _G , y _G ].

More specifically, the creation unit 13 estimates the maximum radius at which the received power of the radio wave transmitted from the primary user is equal to or less than a certain value (set value) as the communication range of the primary user. The set value is set in consideration of allowable interference power, interference margin, and the like. Creating means 13, among the plurality of received power RSSI _i included in the plurality of terminal information INFO_i stored in the storage unit 12, detects the received power RSSI _i _low equal to or less than the set value, the received power RSSI _i that the detected Calculating the distance between the position of the terminal device (at least one of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) having _low and the wave source position [x _G , y _G ], The maximum value of the calculated distance is estimated as the communication range of the primary user.

In addition, when the transmission power of the primary user is known, the creation unit 13 estimates the primary user's communication range using a radio wave propagation model. For example, when the free space propagation model is used as the radio wave propagation model, the creation unit 13 calculates the distance d _primary based on the following equation, and estimates the calculated distance d _primary as the communication range of the primary user.

In the formula (2), P _T is the transmit power of the primary user, P _R is the receiving terminal apparatus (a plurality of terminal devices 2, 6, any one of a plurality of sensors 5 and a plurality of robots 7) Is the power RSSI _i , and λ is the wavelength of the radio wave. Expression (2) is a relational expression when an isotropic antenna is used.

Creating means 13 substitutes included in the plurality of terminal information INFO_i plurality of received power RSSI _i and the primary user of the transmission power and the _P R of each formula (2), the _{P T,} a plurality of distances _{d primary} The maximum distance among the calculated plurality of distances d _primary is estimated as the communication range of the primary user.

  FIG. 4 is a conceptual diagram of a table showing the estimation result of the power status of the primary user. Referring to FIG. 4, table TBL-1 includes a primary user ID, time, a lower limit frequency, a bandwidth, a longitude, a latitude, and a radius. The primary user ID, time, lower limit frequency, bandwidth, longitude, latitude, and radius are associated with each other.

The creation unit 13 uses terminal information INFO_i = [ID / [of terminal devices (any of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7) used for estimating the communication range of the primary user. x _i , y _i ] / bw_S / f_S_low / RSSI _i / t _i ] is read from the storage unit 12 and the read terminal information INFO_i = [ID / [x _i , y _i ] / bw_S / f_S_low / RSSI _i / t _i ] detects time t _i , lower limit frequency f_S_low and bandwidth bw_S, and stores the detected time t _i , lower limit frequency f_S_low and bandwidth bw_S in the time, lower limit frequency and bandwidth of table TBL-1, respectively.

Further, the creation means 13 stores the primary user ID in the primary user ID of the table TBL-1, and stores the estimated wave source position [x _G , y _G ] in the longitude and latitude of the table TBL-1. The estimated communication range of the primary user (the maximum distance among the plurality of distances d _primary ) is stored in the radius of the table TBL-1.

  The creation means 13 performs the above-described processing for all primary users, creates a table TBL-1, and stores the created table TBL-1 in the storage means 12.

  FIG. 5 is a schematic diagram of a table showing determination information of secondary users. Referring to FIG. 5, Table TBL-2 shows secondary user ID, transmission start time, transmission time, lower limit frequency, bandwidth, transmission power, longitude, latitude, and transmission antenna gain. And radius. The secondary user ID, transmission start time, transmission time, lower limit frequency, bandwidth, transmission power, longitude, latitude, transmission antenna gain, and radius are associated with each other.

The creation unit 13 reads out the communication information COM_i of each of the plurality of terminal devices 2 and 6, the plurality of sensors 5, and the plurality of robots 7 from the storage unit 12, and transmits the secondary user ID _i and transmission from the read communication information COM_i. Detect start time t_start _i , transmission time t_RF _i , lower limit frequency f_C_low _i , bandwidth bw_C _i , transmission power POW_t _i , position information [x _i , y _i ] (= longitude, latitude), and transmission antenna gain g _i .

Then, the creation unit 13 calculates the distance at which the received power R _{i of the} radio waves transmitted from each of the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 becomes a set value, based on the following formula: To do.

In Expression (3), P _t represents the transmission power of the terminal device (one of the plurality of terminal devices 2 and 6, the plurality of sensors 5 and the plurality of robots 7), g _i represents the antenna gain, r Represents a distance from the terminal device (any one of the plurality of terminal devices 2 and 6, the plurality of sensors 5, and the plurality of robots 7), and λ represents the wavelength of the radio wave.

The creation means 13 substitutes the set value of the received power, the transmission power POW_t _i, and the transmission antenna gain g _i for R _i , P _t, and g _i in Expression (3), respectively, and the distance at which the received power R _i becomes the set value r is calculated. Then, the creation unit 13 sets the calculated distance r as a radius representing the communication range of the secondary user.

Then, the creation means 13 uses the secondary user ID _i , transmission start time t_start _i , transmission time t_RF _i , lower limit frequency f_C_low _i , bandwidth bw_C _i , transmission power POW_t _i , position information [x _i , y _i ], transmit antenna gain g _i and radius (= distance r), respectively table TBL-2 secondary user ID, transmission start time, transmission time, the lower limit frequency, bandwidth, transmit power, longitude, latitude, transmit antenna gain and the radius To store.

  The creation unit 13 performs the above-described processing for all of the plurality of terminal devices 2 and 6, the plurality of sensors 5, and the plurality of robots 7, creates a table TBL-2, and stores the created table TBL-2 in the storage unit 12. To store.

  The third term on the right side of Equation (3) is a term indicating the propagation loss of radio waves when following the free space propagation model of radio waves. In the embodiment of the present invention, the creating means 13 may obtain the distance r using a propagation loss according to a propagation model other than the free space propagation model. Therefore, when a propagation loss according to a propagation model other than the free space propagation model is used, the third term on the right side of Equation (3) is changed to a propagation loss according to the actually used propagation model.

  A method for determining the presence or absence of interference will be described. FIG. 6 is a diagram for explaining a method of determining whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other.

The determination means 14 detects the longitude and latitude of the table TBL-1 recorded in the storage means 12 as the center Center1 of the communication range of the primary user, and determines the radius of the table TBL-1 as the communication range of the primary user. It is detected as the radius _{r 1} which represents. Further, the determination unit 14 detects the longitude and latitude of the table TBL-2 recorded in the storage unit 12 as the center Center2 of the communication range of the secondary user, and the radius of the table TBL-2 is the communication of the secondary user. It is detected as the radius r ₂ representing the range. Then, the determination unit 14 calculates the distance D between the center Center1 and the center Center2.

  Then, the determination unit 14 determines whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other by determining whether or not the following equation holds.

  More specifically, when determining that the expression (4) is established, the determination unit 14 determines that the primary user's wireless communication and the secondary user's wireless communication interfere with each other, and the expression (4) is satisfied. When it is determined that the wireless communication is not performed, it is determined that the wireless communication of the primary user and the wireless communication of the secondary user do not interfere with each other.

  When Expression (4) is established, the communication range of the primary user is in contact with or intersects with the communication range of the secondary user (see (a) of FIG. 6). When the communication range of the primary user is in contact with the communication range of the secondary user, a terminal device (a plurality of terminal devices 2 and 2 located at the contact point between the communication range of the primary user and the communication range of the secondary user) 6. Any of the plurality of sensors 5 and the plurality of robots 7) can receive both the radio waves transmitted from the primary user and the radio waves transmitted from the secondary user.

  Further, when the communication range of the primary user intersects with the communication range of the secondary user, terminal devices (multiple terminal devices) that exist in both the communication range of the primary user and the communication range of the secondary user 2, 6. Any one of the plurality of sensors 5 and the plurality of robots 7) can receive both the radio wave transmitted from the primary user and the radio wave transmitted from the secondary user.

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

Therefore, when the expression (4) is satisfied, that is, when the distance D is equal to or less than the sum of the radius r ₁ and the radius r ₂ (= r ₁ + r ₂ ), the determination unit 14 performs wireless communication of the primary user. And the secondary user's wireless communication are determined to interfere with each other.

  On the other hand, when Expression (4) is not established, the communication range of the primary user does not touch or intersect with the communication range of the secondary user (see (b) of FIG. 6). As a result, a terminal device (a plurality of terminal devices 2, 6. a plurality of sensors 5 and a plurality of robots 7) existing within the communication range of the primary user can receive radio waves transmitted from the secondary user. A terminal device (one of a plurality of terminal devices 2, 6. a plurality of sensors 5 and a plurality of robots 7) that is not received and is within the communication range of the secondary user transmits a radio wave transmitted from the primary user Not receive.

  As described above, when the communication range of the primary user does not touch or intersect with the communication range of the secondary user, the primary user's wireless communication and the secondary user's wireless communication interfere with each other. do not do.

Therefore, when the expression (4) is not satisfied, that is, when the distance D is larger than the sum of the radius r ₁ and the radius r ₂ (= r ₁ + r ₂ ), the determination unit 14 performs wireless communication of the primary user. And the secondary user's wireless communication are determined not to interfere with each other.

  The determination means 14 uses the above-described method for all primary users and all secondary users (a plurality of terminal devices 2, 6. a plurality of sensors 5 and a plurality of robots 7). It is determined whether or not the wireless communication of the secondary user interferes with the wireless communication of the secondary user.

  The above-described method for determining the presence or absence of interference is a determination method when it is assumed that the primary user and the secondary user share the same frequency band.

  When it is not assumed that the primary user and the secondary user share the same frequency band, the determination means 14 executes the following determination method in addition to the above determination method, and performs the primary user It is determined whether or not the wireless communication of the secondary user interferes with the wireless communication of the secondary user.

  FIG. 7 is a diagram for explaining another method for determining whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other.

  Referring to FIG. 7, when the frequency band bw1 of the primary user is a part of the frequency band bw2 of the secondary user, the frequency band bw1 of the primary user and the frequency of the secondary user The band bw2 partially overlaps (see (a) of FIG. 7).

  Further, when the frequency band bw2 of the secondary user is a part of the frequency band bw1 of the primary user, the frequency band bw1 of the primary user and the frequency band bw2 of the secondary user are also , Partially overlapping (see FIG. 7B).

  Further, when the frequency band bw1 of the primary user is a frequency band different from the frequency band bw2 of the secondary user, the frequency band bw1 of the primary user and the frequency band bw2 of the secondary user do not overlap ( (See (c) of FIG. 7).

Therefore, when the determination unit 14 determines that the distance D is equal to or less than the sum of the radius r ₁ and the radius r ₂ (= r ₁ + r ₂ ) in the method for determining the presence or absence of interference described in FIG. It is determined whether the frequency band bw1 of the primary user and the frequency band bw2 of the secondary user overlap at least partially. When the determination unit 14 determines that the frequency band bw1 of the primary user and the frequency band bw2 of the secondary user overlap at least partially, the wireless communication of the primary user and the wireless communication of the secondary user Are determined to interfere with each other.

On the other hand, when the determination unit 14 determines that the frequency band bw1 of the primary user and the frequency band bw2 of the secondary user do not overlap at least partially, the wireless communication of the primary user and the wireless of the secondary user It is determined that communication does not interfere. Since the frequency band bw1 of the primary user and the frequency band bw2 of the secondary user are different from each other, even if the distance D is equal to or less than the sum (= r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ , 1 This is because interference between the secondary user's wireless communication and the secondary user's wireless communication does not occur.

  FIG. 8 is a diagram for explaining still another method for determining whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other.

  Referring to FIG. 8, when it is determined that the frequency band bw <b> 1 of the primary user and the frequency band bw <b> 2 of the secondary user overlap at least partially in the method for determining the presence or absence of interference described in FIG. 7. The means 14 further determines whether or not the sub frequency bands bw_sub_1 and bw_sub_2 used by the primary user overlap the sub frequency band bw_sub_3 used by the secondary user in the overlapped frequency band bw_overlap. Determine.

  When the determination unit 14 determines that the sub frequency bands bw_sub_1 and bw_sub_2 used by the primary user overlap with the sub frequency band bw_sub_3 used by the secondary user ((a) of FIG. 8). Reference) It is determined that the primary user's wireless communication and the secondary user's wireless communication interfere with each other. On the other hand, when the determination unit 14 determines that the sub frequency bands bw_sub_1 and bw_sub_2 used by the primary user do not overlap with the sub frequency bands bw_sub_3 used by the secondary user ((b in FIG. 8) ) Reference) It is determined that the primary user's wireless communication and the secondary user's wireless communication do not interfere with each other.

  The plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7 may perform wireless communication using an OFDM (Orthogonal Frequency Division Multiplexing) communication method. In such a case, the determination method illustrated in FIG. It is meaningful to determine whether or not there is interference between the primary user's wireless communication and the secondary user's wireless communication.

  When the determination method of the presence / absence of interference described in FIGS. 6 to 8 is determined as determination method 1 to determination method 3, respectively, the determination unit 14 is configured such that the primary user and the secondary user share the same frequency band. If it is assumed that the wireless communication of the primary user and the wireless communication of the secondary user interfere using only the determination method 1. Further, when it is not assumed that the primary user and the secondary user share the same frequency band, the determination unit 14 uses the determination methods 1 and 2 to perform wireless communication with the primary user and 2 It may be determined whether or not the secondary user's wireless communication interferes, and whether or not the primary user's wireless communication and the secondary user's wireless communication interfere using the determination methods 1 to 3. May be determined.

  Note that the frequency bands bw1 and bw2 illustrated in FIG. 7 and the sub-frequency bands bw_sub_1 to bw_sub_3 illustrated in FIG. 8 are the same in terms of representing frequency bands for performing wireless communication. Therefore, in the embodiment of the present invention, the frequency bands bw1 and bw2 shown in FIG. 7 and the sub-frequency bands bw_sub_1 to bw_sub_3 shown in FIG. 8 constitute the “first frequency band” or the “second frequency band”. To do.

  FIG. 9 is a conceptual diagram of a table showing the determination result of the presence or absence of interference between the primary user's wireless communication and the secondary user's wireless communication. Referring to FIG. 9, table TBL-3 includes a primary user ID and a secondary user ID. “1” indicates that the wireless communication of the primary user and the wireless communication of the secondary user interfere, and “0” indicates the wireless communication of the primary user and the wireless communication of the secondary user. Represents no interference.

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

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

  The determination unit 14 determines whether or not the primary user's wireless communication and the secondary user's wireless communication interfere with each other by the method described above, and the primary user's wireless communication and the secondary user's wireless communication. A table TBL-3 indicating the determination result of the presence or absence of interference with communication is created, and the created table TBL-3 is output to the arbitrating means 15.

  An arbitration method for avoiding interference when it is determined that the primary user's radio communication and the secondary user's radio communication interfere with each other will be described.

  The arbitration unit 15 receives from the determination unit 14 the table TBL-3 indicating the determination result of the presence or absence of interference. Then, the arbitrating unit 15 refers to the table TBL-3 and detects the primary user and the secondary user who interfere with the wireless communication.

Then, the arbitration unit 15 uses the longitude and latitude of the table TBL-1 recorded in the storage unit 12 for the primary user and the secondary user who are determined to interfere with each other in the wireless communication. The center of the range is detected as Center1, and the radius of the table TBL- ₁ is detected as the radius r1 representing the communication range of the primary user. Further, the determination unit 14 detects the longitude and latitude of the table TBL-2 recorded in the storage unit 12 as the center Center2 of the communication range of the secondary user, and the radius of the table TBL-2 is the communication of the secondary user. It is detected as the radius r ₂ representing the range. Then, the determination unit 14 calculates the distance D between the center Center1 and the center Center2.

FIG. 10 is a diagram for explaining a method of arbitrating communication conditions of secondary users. Referring to FIG. 10, arbitration means 15 determines whether distance D is greater than radius r ₁ and radius r ₂ . When the arbitration unit 15 determines that the distance D is larger than the radius r ₁ and the radius r ₂ (see FIG. 10A), the primary user wireless communication and the secondary user wireless communication are performed. The communication parameter of the secondary user is changed so as to avoid the interference. More specifically, the arbitrating unit 15 adjusts the power of the secondary user so as to avoid interference between the wireless communication of the primary user and the wireless communication of the secondary user, or from the secondary user. Adjust the directivity of the transmitted radio wave. When the distance D is larger than the radius r ₁ and the radius r ₂ , since the secondary user's center position is outside the primary user's communication range, the secondary user's power or radio wave directivity can be reduced. This is because the interference between the primary user's wireless communication and the secondary user's wireless communication can be avoided by adjusting.

On the other hand, when it is determined that the distance D is smaller than the radius r ₁ or the radius r ₂ (see FIG. 10B), the arbitrating unit 15 performs arbitration so as to stop the secondary user's wireless communication. When the distance D is smaller than the radius r ₁ or the radius r ₂ , since the secondary user's center position exists within the primary user's communication range, the secondary user's power or radio wave directivity can be reduced. Even if the adjustment is made, the communication range of the secondary user partially overlaps the communication range of the primary user, and interference between the primary user's wireless communication and the secondary user's wireless communication cannot be avoided. Therefore, when the distance D is smaller than the radius r ₁ or the radius r ₂ , the arbitration is performed so as to stop the secondary user's wireless communication.

FIG. 11 is a diagram for explaining a method of arbitrating communication conditions of secondary users. Referring to FIG. 11, when it is determined that distance D is larger than radius r ₁ and radius r ₂ , arbitration means 15 tracks the primary user's communication range (r ₁₎ obtained by observing for a certain period of time. It is determined whether (t ₀ ) → r ₁ (t)) includes the center of the communication range of the secondary user. In this case, the fixed time depends on the moving speed of the primary user, but is, for example, 30 seconds.

When the arbitration unit 15 determines that the trajectory of the primary user's communication range includes the center of the secondary user's communication range, the secondary user's power ( (Transmission power) is reduced (see (a) of FIG. 11). As a result, the radius of the communication range of the secondary user is reduced from the radius r ₂ to the radius r ′ ₂ . As a result, the distance D becomes larger than the sum of the radius r ₁ (t) and the radius r ′ ₂ (= r ₁ (t) + r ′ ₂ ), and the primary user's wireless communication and the secondary user's wireless Interference with communication is avoided.

  By arbitrating by the arbitration method shown in FIG. 11A, the secondary user can perform wireless communication using the shared frequency for as long as possible by adjusting his / her power.

On the other hand, the arbitration unit 15 adjusts the directivity of the radio wave transmitted from the secondary user when it is determined that the trajectory of the communication range of the primary user does not include the center of the communication range of the secondary user. Thereby, the shape of the radio wave transmitted from the secondary user is changed from the circular CIR to the elliptical ELLIP (see FIG. 11B). As a result, the distance D becomes larger than the sum of the radius r ₁ (t) and the radius r ″ ₂ (= r ₁ (t) + r ″ ₂ ), and the primary user's wireless communication and the secondary user's wireless Interference with communication is avoided.

  Therefore, by adjusting the directivity of the secondary user's radio wave, the secondary user who transmits the radio wave in a certain direction can avoid interference with the primary user while maintaining his / her wireless communication.

  As a directivity adjustment method, an adaptive array technology such as a DCMP (Directionally Constrained Minimization of Power) method can be used. This DCMP method is a method of estimating the direction of arrival of radio waves at the time of reception, deriving the optimum weight by the direction-constrained output power minimization method, and performing beam forming.

  FIG. 12 is a schematic diagram showing a change in the communication method of the secondary user. With reference to FIG. 12, when it is determined that the primary user's wireless communication and the secondary user's wireless communication interfere with each other by the above-described method, the primary user's wireless communication and the secondary user's wireless are performed. As a method for avoiding interference with communication, there are a change in communication conditions of the secondary user (adjustment of power or directivity) and a stop of the secondary user's wireless communication (wave stop).

  When the communication condition of the secondary user is changed, the secondary user performs wireless communication with the base station 3 by multihop when wireless communication by multihop is possible. In this case, the frequency band used for multihop is an unlicensed band such as Wi-Fi or a different shared frequency band. By using multi-hop, an increase in load on the existing communication network can be reduced.

  When the secondary user stops or when the multi-hop cannot be used, the secondary user can accommodate the existing communication network (a communication network using a shared frequency band, for example, LTE (Long Term Evolution)). To change. By changing the accommodation network, the secondary user can perform radio communication by sharing the frequency as much as possible.

  FIG. 13 is a flowchart for explaining the operation of the communication arbitration device 1 shown in FIG. Referring to FIG. 13, when the operation of the communication arbitration device 1 is started, the determination unit 14 of the communication arbitration device 1 performs the primary user wireless communication and the secondary user wireless communication by the method described above. The presence or absence of interference is determined (step S1).

  Then, the determination unit 14 outputs the determination result of the presence / absence of interference between the primary user's wireless communication and the secondary user's wireless communication to the arbitration unit 15.

  The arbitration unit 15 receives a determination result of whether or not there is interference between the primary user's wireless communication and the secondary user's wireless communication from the determination unit 14, and based on the received determination result, the wireless communication interferes with each other. Then, for the determined primary user and secondary user, the communication condition of the secondary user is arbitrated so as to avoid interference between the primary user's wireless communication and the secondary user's wireless communication (steps). S2). The communication arbitration device 1 transmits the arbitration result to the plurality of terminal devices 2 and 6, the plurality of sensors 5, and the plurality of robots 7 via the base station 3. As a result, the operation of the communication arbitration device 1 ends.

  FIG. 14 is a flowchart for explaining the detailed operation of step S1 shown in FIG. Referring to FIG. 14, when the operation of communication arbitration device 1 is started, determination unit 14 of communication arbitration device 1 determines the center of the communication range of the primary user from table TBL-1 stored in storage unit 12. And the center of the communication range of the secondary user is detected from the table TBL-2 stored in the storage means 12. Then, the determination unit 14 calculates the distance D between the detected center of the communication range of the primary user and the center of the communication range of the secondary user (step S11).

Thereafter, the determination unit 14 detects the radius r ₁ representing the communication range of the primary user from the table TBL-1 and detects the radius r ₂ representing the communication range of the secondary user from the table TBL-2 (step S1). S12).

Then, the determination unit 14 determines whether or not the distance D is equal to or less than the sum (r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ (step S13).

In step S13, when it is determined that the distance D is equal to or less than the sum (r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ , the determination unit 14 uses the table TBL-1 stored in the storage unit 12 as 1 The frequency band bw1 of the secondary user's wireless communication is detected, and the frequency band bw2 of the secondary user's wireless communication is detected from the table TBL-2 stored in the storage unit 12 (step S14).

  Then, the determination unit 14 determines whether or not the frequency band bw1 and the frequency band bw2 overlap at least partially (step S15).

  In step S15, when it is determined that the frequency band bw1 and the frequency band bw2 overlap at least partially, the determination unit 14 determines that the wireless communication of the primary user interferes with the wireless communication of the secondary user ( Step S16).

On the other hand, when it is determined in step S13 that the distance D is not less than or equal to the sum (r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ , or in step S15, the frequency band bw1 and the frequency band bw2 are at least partially. When it is determined that they do not overlap, the determination unit 14 determines that the wireless communication of the primary user and the wireless communication of the secondary user do not interfere (step S17).

  After step S16 or step S17, the determination means 14 determines whether or not there is any interference for all secondary users (step S18).

When it is determined in step S18 that the presence / absence of interference has not been determined for all secondary users, the determination unit 14 communicates with another secondary user from the table TBL-2 stored in the storage unit 12. detecting the center of the range and the radius _{r 2} of the (step S19).

  Thereafter, the series of operations proceeds to step S13, and steps S13 to S19 are repeatedly executed until it is determined in step S18 that the presence or absence of interference has been determined for all secondary users.

  If it is determined in step S18 that the presence / absence of interference has been determined for all secondary users, the determination unit 14 determines whether the presence / absence of interference has been determined for all primary users ( Step S20).

In step S20, when it is determined that the presence / absence of interference has not been determined for all primary users, the determination unit 14 communicates with another primary user from the table TBL-1 stored in the storage unit 12. detecting the center of the range and the radius _{r 1} of the (step S21).

  Thereafter, the series of operations proceeds to step S13, and steps S13 to S21 are repeatedly executed until it is determined in step S20 that the presence or absence of interference has been determined for all primary users.

  When it is determined in step S20 that the presence or absence of interference has been determined for all primary users, the determination unit 14 determines the presence or absence of interference for all primary users and secondary users (Table TBL-3) is created (step S22), and the created determination result (table TBL-3) is output to the arbitrating means 15. Then, a series of operation | movement transfers to step S2 of FIG.

When it is determined in step S13 that the distance D is not less than or equal to the sum (r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ , the wireless communication of the primary user and the wireless communication of the secondary user do not interfere with each other. When the distance D is not less than the sum (r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ (see step S17), the primary user's frequency band bw1 and the secondary user's frequency band bw2 are determined. This is because the primary user's wireless communication and the secondary user's wireless communication do not interfere with each other even if they overlap at least partially.

The flowchart shown in FIG. 14 shows the detailed operation of step S1 in FIG. 13 when it is not premised that the primary user and the secondary user share the same frequency band. When it is assumed that the user and the secondary user share the same frequency band, step S14 and step S15 in FIG. 14 are not executed, and in step S13, the distance D has the radius r _1. When it is determined that the value is equal to or less than the sum (r ₁ + r ₂ ) of the value and the radius r ₂ , the series of operations proceeds to step S16.

  FIG. 15 is a flowchart for explaining the detailed operation of step S2 shown in FIG. Referring to FIG. 15, after step S <b> 1 in FIG. 13, arbitration means 15 of communication arbitration apparatus 1 receives the determination result of presence / absence of interference (table TBL-3) from determination means 14, and the received determination result ( Based on Table TBL-3), a primary user and a secondary user that interfere with each other are detected (step S31).

  Then, the arbitration unit 15 detects the center of the communication range of the primary user from the table TBL-1 stored in the storage unit 12 for the detected primary user and secondary user that interfere with each other, and stores them. The center of the communication range of the secondary user is detected from the table TBL-2 stored in the means 12. Thereafter, the arbitrating means 15 calculates a distance D between the detected center of the communication range of the primary user and the center of the communication range of the secondary user (step S32).

Subsequently, the arbitrating means 15 detects the radius r ₁ representing the communication range of the primary user from the table TBL- ₁ and detects the secondary r from the table TBL-2 for the primary user and the secondary user that interfere with each other. detecting the radius _{r 2} representing the communication range of the user (step S33).

Thereafter, the arbitrating unit 15 estimates the communication range of the primary user and the communication range of the secondary user (step S34). More specifically, the arbitrating unit 15 estimates a circle having the radius r ₁ as the communication range of the primary user, and estimates a circle having the radius r ₂ as the communication range of the secondary user.

Then, the arbitrating unit 15 determines whether or not the communication range of the primary user and the communication range of the secondary user intersect (Step S35). More specifically, when the distance D is equal to or less than the sum (r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ , the arbitration unit 15 determines the communication range of the primary user and the communication range of the secondary user. If the distance D is not less than or equal to the sum (r ₁ + r ₂ ) of the radius r ₁ and the radius r ₂ , the communication range of the primary user and the communication range of the secondary user should not intersect judge.

  In step S35, when it is determined that the communication range of the primary user and the communication range of the secondary user do not intersect with each other, the series of operations shifts to another arbitration time (step S36). Then, the process proceeds to step S31.

On the other hand, in step S35, when the communication range of the primary user of the communication range and the secondary user is determined to intersect, the arbitration unit 15, or the distance D is smaller than the radius r ₁ or radius r ₂ not Is determined (step S37).

In step S37, when the distance D is determined to be smaller than the radius r ₁ or radius r _2, the arbitration unit 15 arbitrates to stop radio communication of the secondary user (step S38). Thereafter, the arbitrating unit 15 determines whether there is another communication network that can be used (step S39).

  When it is determined in step S39 that there is no other communication network that can be used, the series of operations proceeds to step S38. On the other hand, when it is determined in step S39 that there is another usable communication network, the second user is arbitrated to connect to another communication network (step S40).

On the other hand, in step S37, the distance (when it is determined that the words ,, the distance D is greater than the radius r ₁ and the radius r ₂₎ D is the time that is judged not to be less than the radius r ₁ or radius r _2, arbitration The means 15 further determines whether or not the trajectory of the primary user's communication range during a certain period passes through the center of the secondary user's communication range (step S41).

  In step S41, when it is determined that the trajectory of the primary user's communication range passes through the center of the secondary user's communication range, the arbitration unit 15 performs the primary user's wireless communication and the secondary user's wireless communication. Arbitration is performed so as to adjust the power of the secondary user so as to avoid interference with communication (step S42).

  On the other hand, when it is determined in step S41 that the trajectory of the primary user's communication range does not pass through the center of the secondary user's communication range, the arbitration unit 15 performs the primary user's wireless communication and secondary usage. Arbitration is performed so as to adjust the directivity of the secondary user's radio wave so as to avoid interference with the user's wireless communication (step S43).

  Then, after step S42 or step S43, the arbitrating means 15 determines whether or not the secondary user can use multi-hop wireless communication (step S44). More specifically, the arbitration unit 15 determines whether the secondary user uses the secondary usage target of the mediation based on the location information of the secondary user to be mediated and the location information of the other secondary user. The secondary user determines that the multi-hop wireless communication can be used, and the secondary user does not exist around the secondary user to be arbitrated. It is determined that the user cannot use multi-hop wireless communication. Further, the arbitration unit 15 determines that the secondary user can use the multi-hop wireless communication when there is an unlicensed band such as Wi-Fi or a different shared frequency band, and the unlicensed band such as Wi-Fi or When there is no different shared frequency band, it is determined that the secondary user cannot use the wireless communication by multi-hop.

  When it is determined in step S44 that multi-hop wireless communication is available, the arbitrating unit 15 performs arbitration so as to perform multi-hop wireless communication (step S45).

  On the other hand, when it is determined in step S44 that multi-hop wireless communication is not available, the arbitrating unit 15 determines whether there is another available communication network (step S46).

  When it is determined in step S46 that there is no other communication network that can be used, the arbitration unit 15 performs secondary usage so as to avoid interference between the primary user's wireless communication and the secondary user's wireless communication. The mediator adjusts the power or directivity to perform wireless communication (step S47).

  On the other hand, when it is determined in step S46 that there is another available communication network, the series of operations proceeds to step S40.

  Then, after any of step S40, step S45, and step S47, the arbitration result is transmitted to the plurality of terminal devices 2, 6, the plurality of sensors 5, and the plurality of robots 7. Move to “Finish”.

  The communication arbitration device 1 determines whether or not there is interference between the primary user's wireless communication and the secondary user's wireless communication in accordance with the above-described flowchart shown in FIG. 13 (including the flow cart shown in FIGS. 14 and 15). And mediation based on the determination result of the presence or absence of the interference, it is possible to determine the communication condition of the secondary user that does not interfere with the primary user, so as not to interfere with the primary user. The communication conditions of secondary users can be arbitrated. As a result, it is possible to perform wireless communication so that the secondary user does not interfere with the primary user. When a shared frequency band is used, wireless communication can be performed using the shared frequency band so that the secondary user does not interfere with the primary user.

  FIG. 16 is a diagram illustrating another shape of another communication range of the primary user and the secondary user. In the above description, the communication range of the primary user and the secondary user has been described as having a circular shape. However, in the embodiment of the present invention, the primary user and the secondary user are not limited thereto. The communication range may be elliptical (see (a) in FIG. 16), or may be a polygon such as a quadrangle and pentagon (see (b) and (c) in FIG. 16). May have any shape (see FIG. 16D).

  FIG. 17 is a diagram for explaining an index representing the communication range of the primary user and the secondary user when the communication range of the primary user and the secondary user has an arbitrary shape.

  Referring to FIG. 17, the primary user communication range CM_REG1 and the secondary user communication range CM_REG2 have arbitrary shapes. The primary user communication range CM_REG1 has a center O1, and the secondary user communication range CM_REG2 has a center O2.

The length of the line segment Line connecting the center O1 and the center O2 is obtained as the distance D. Further, the distance d ₁ from the center O1 to the line defining the primary user communication range CM_REG1 in the direction from the center O1 to the center O2 in the direction parallel to the line Line is defined as the primary user communication range. This is an index representing CM_REG1.

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

The indices d ₁ and d ₂ are used in place of the radii r ₁ and r ₂ described above, respectively. In the flowchart shown in FIG. 14, the primary user wireless communication and the secondary user wireless communication are performed. It is used to determine the presence or absence of interference, and is used to mediate communication conditions for secondary users in the flowchart shown in FIG.

Preferably, the maximum distance _{d1_max} from the center O1 to the line defining the primary user communication range CM_REG1 is used as an index representing the primary user communication range CM_REG1, and the communication range of the center O2 or rsecondary user is used. the maximum distance _{d 2_Max} to the line defining the CM_REG2 to index representing the communication range CM_REG2 secondary user. Maximum distance _{d 1_max,} by using as an index representing the communication range CM_REG1 and secondary use of the communication range CM_REG2 each primary user of _{d 2_max,} the wireless communication of the primary user of the wireless communication and the secondary user The presence or absence of interference can be accurately determined. Note that the maximum distances d 1 — _max and d 2 — _max are used instead of the radii r ₁ and r ₂ described above, respectively, and in the flowchart shown in FIG. 14, the primary user wireless communication and the secondary user wireless communication 15 is used to determine whether or not there is interference, and in the flowchart shown in FIG.

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

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

The ROM stores a program Prog_A having the flowchart shown in FIG. 13 (including the flowchart shown in FIG. 14 and the flowchart shown in FIG. 15). Then, the CPU reads the program Prog_A from the ROM, executes the read program Prog_A, determines whether or not there is interference between the primary user's wireless communication and the secondary user's wireless communication, and whether or not the interference exists. The arbitration of the communication condition of the secondary user based on the determination result is executed. The RAM temporarily stores radii r ₁ and r ₂ (indexes d ₁ and d ₂ ), received power RSSI _i, distance D, and the like.

  The program Prog_A may be recorded and distributed on a recording medium such as a CD or DVD. In this case, the CPU reads and executes the program Prog_A from the mounted recording medium, determines whether there is interference between the primary user's wireless communication and the secondary user's wireless communication, and determines whether there is interference. Based on the result, the communication condition of the secondary user is adjusted. Therefore, a recording medium such as a CD or a DVD in which the program Prog_A is recorded is a recording medium that can be read by a computer (CPU).

  FIG. 18 is a schematic diagram showing a data structure according to the embodiment of the present invention. Referring to FIG. 18, the data structure D-STR according to the embodiment of the present invention includes a primary user ID, a primary user transmission power, a secondary user ID, and a secondary user position. Information, secondary user's reception power, secondary user's antenna gain, and secondary user's transmission power are included.

  The primary user ID and the transmission power of the primary user are associated with each other. The secondary user ID, secondary user location information, secondary user received power, secondary user antenna gain, and secondary user transmission power are associated with each other.

The primary user ID is P (P is a positive integer) a number of decision information ID1_1～ID1_P, transmission power of the primary user, consists of P number of transmission power _{P T 1_1~P} T 1_P.

The secondary user ID is composed of Q (Q is a positive integer) pieces of identification information ID2_1 to ID2_Q, and the secondary user's location information is composed of Q pieces of location information Ps2_1 to Ps2_Q. received power is made the Q of the received power _{P R 2_1~P} R 2_Q, antenna gain of the secondary user is made the Q of the antenna gain _{g 2 _1~g} 2 _Q, transmission of the secondary user power consists of a Q-number of transmit power _{P T 2_1~P} T 2_Q.

  The creation unit 13 of the communication arbitration device 1 creates a data structure D-STR based on the above-described tables TBL-1 and TBL-2, and stores the created data structure D-STR in the storage unit 12.

  Based on the data structure D-STR, the determination unit 14 determines whether or not there is interference between the primary user's wireless communication and the secondary user's wireless communication by the method described above, and the p determined to interfere with each other. (P is an integer satisfying 1 ≦ p ≦ P) primary users and q (q is an integer satisfying 1 ≦ q ≦ Q) secondary users are detected.

The primary user and interfere with the determined q-number of position of the secondary user information Ps2_1~Ps2_q and the q reception power _{P R 2_1~P} R _{2_q,} the determination unit 14 receives power _P R _{2_1~} the weighted average of q positional information Ps2_1~Ps2_q where the P _R 2_q the weights used to compute the position of the primary user consisting of (see equation (1)). Here, the determination means 14 for calculating the position of the primary user constitutes “calculation means”.

  Further, the q pieces of position information Ps2_1 to Ps2_q and the position of the primary user are determined by the determination means 14 between the center of the communication range of the primary user and the center of the q communication ranges of the q secondary users. Used to calculate the distances D1 to Dq. Here, the center of the communication range of the primary user is composed of the position of the primary user calculated by the equation (1), and the centers of the q communication ranges of the q secondary users are respectively q Each piece of position information Ps2_1 to Ps2_q. The determination means 14 for calculating the distances D1 to Dq constitutes “calculation means”.

Furthermore, the secondary user and interfere with the determined p number of primary users of p pieces of transmission power P _T 1_1~P _{T 1_p,} and the primary user and interfere with the determined q-number of secondary use q number of the received power _{P R 2_1~P} R _{2_q} the user, the determination unit 14 p number of communication range of p number of primary users (radius _r 1_1 _{~r 1_p} (= index _d 1_1 _{~d 1_p))} Is used to calculate Here, the determination unit 14 that calculates p communication ranges (radius r _{1 — 1 to} r _{1 — p} (= index d _{1 — 1 to} d ₁ — _p )) constitutes “calculation unit”.

Furthermore, the primary user and interfere with the determined q-number of secondary users of q antenna gain _{g 2 _1~g} 2 _q and the q transmission power _{P T 2_1~P} T _{2_q,} the determination means 14 Is used to calculate _q communication ranges (indexes d _{2-1 to} d _2-q ) of q secondary users using Equation (3). Here, the determination means 14 for calculating the _q communication ranges (indexes d _{2-1 to} d _2-q ) constitutes “calculation means”.

Furthermore, the distance D1～Dq, p-number of communication range (radius _r 1_1 _{~r 1_p} (= index _d 1_1 _{~d 1_p))} and the q communication range (index _d 2-1 _{~d 2-q)} is determined The means 14 includes any one of p communication ranges (radius r _{1 — 1 to} r _{1 — p} (= index d _{1 — 1 to} d ₁ — p)) whose distances (D _{1 to Dq} ) interfere with each other and q communication ranges (index). it is used to perform a first determination process for determining whether or not more than the sum of any of the _{d 2-1} ~d _2-q).

Then, in the first determination process, the determination unit 14 includes any one of p communication ranges (radius r _{1 — 1 to} r _{1 — p} (= index d _{1 — 1 to} d ₁ — _p )) that interfere with each other and q communication ranges (index). d _{2-1 to} d _2-q ), it is determined that the wireless communication of the primary user and the wireless communication of the secondary user interfere with each other.

Preferably, each of the p communication ranges and the q communication ranges includes a circular radius (any one of r _{1 — 1 to} r _{1 — p} ).

Preferably, the distance D1～Dq, p-number of communication range (radius _r 1_1 _{~r 1_p} (= index _d 1_1 _{~d 1_p))} and the q communication range (index _d 2-1 _{~d 2-q)} is Arbitration means 15 is used to arbitrate the communication conditions of the secondary user so as to avoid interference between the primary user's wireless communication and the secondary user's wireless communication.

  Preferably, the data structure D-STR includes p frequency bands of radio waves transmitted from p primary users and q frequency bands of radio waves transmitted from q secondary users. In addition. Then, in the p frequency bands and the q frequency bands, the determination unit 14 determines whether or not at least a part of any one of the p frequency bands overlaps any one of the q frequency bands. This is used to execute the determination process.

The determination means 14, (either D1～Dq) distance in the first determination process is mutually interfering p number of communication range (radius _r 1_1 _{~r 1_p} (= index _d 1_1 _{~d 1_p))} It is determined that it is equal to or less than the sum of any one of the _q communication ranges (indexes d _{2-1 to} d _2-q ), and any one of the p frequency bands and q pieces are included in the second determination process. When it is determined that at least a part of one of the frequency bands overlaps, it is determined that the primary user's wireless communication and the secondary user's wireless communication interfere with each other.

  According to the above-described embodiment, the communication arbitration device according to the embodiment of the present invention is configured so that the wireless communication of the secondary user is 1 based on the communication range of the primary user and the communication range of the secondary user. Determining means for determining whether or not to interfere with the wireless communication of the next user; and when the determining means determines that the wireless communication of the secondary user interferes with the wireless communication of the primary user, the wireless of the primary user Arbitration means for arbitrating communication conditions of the secondary user's wireless communication may be provided so as to avoid interference between the communication and the secondary user's wireless communication.

  This is because if the determination unit and the arbitration unit are provided, the secondary user can perform wireless communication while avoiding interference between the primary user's wireless communication and the secondary user's wireless communication.

  Further, in the program according to the embodiment of the present invention, the determination means determines that the secondary user wireless communication is based on the primary user wireless communication based on the primary user communication range and the secondary user communication range. The first step of determining whether or not to interfere with communication, and the arbitrating means, when the determining means determines that the secondary user's wireless communication interferes with the primary user's wireless communication, the primary user's What is necessary is just a program for making a computer perform the 2nd step which mediates the communication condition of secondary user's radio | wireless communication so that interference with radio | wireless communication and radio | wireless communication of a secondary user may be avoided.

  If the computer executes the first and second steps, the secondary user can perform wireless communication while avoiding interference between the primary user's wireless communication and the secondary user's wireless communication. It is.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  The present invention is applied to a communication arbitration device, a program for causing a computer to execute, a computer-readable recording medium storing the program, and a data structure.

  DESCRIPTION OF SYMBOLS 1 Communication arbitration apparatus, 2, 6 Terminal apparatus, 3, 4 Base station, 5 Sensor, 7 Robot, 8 Wired cable, 10 Wireless communication system, 11 Reception means, 12 Storage means, 13 Creation means, 14 Determination means, 15 Arbitration Means, 16 Transmission means.

Claims (21)

A determination unit for determining whether the wireless communication of the secondary user interferes with the wireless communication of the primary user based on the communication range of the primary user and the communication range of the secondary user;
When the determination means determines that the wireless communication of the secondary user interferes with the wireless communication of the primary user, the interference between the wireless communication of the primary user and the wireless communication of the secondary user is avoided. A communication arbitration device comprising arbitration means for arbitrating communication conditions for wireless communication of the secondary user. It is parallel to a straight line connecting the center of the communication range of the primary user and the center of the communication range of the secondary user, and from the center of the communication range of the primary user, A distance from a center of the communication range of the primary user to a line defining the communication range of the primary user in a direction toward the center of the communication range is a first distance, and is parallel to the straight line; and From the center of the secondary user communication range to the line defining the communication range of the secondary user in the direction from the center of the communication range of the secondary user toward the center of the communication range of the primary user. When the distance is the second distance and the distance between the center of the primary user communication range and the center of the secondary user communication range is the third distance,
The determination means performs a first determination process for determining whether or not the third distance is equal to or less than a sum of the first distance and the second distance. In the first determination process, And when the third distance is less than or equal to the sum of the first distance and the second distance, the secondary user's wireless communication interferes with the primary user's wireless communication. The communication arbitration apparatus according to claim 1, wherein the determination is performed.   The determination unit determines whether or not a first frequency band used for the wireless communication of the primary user and a second frequency band used for the wireless communication of the secondary user overlap at least partially. A second determination process is further performed. In the first determination process, it is determined that the third distance is less than or equal to a sum of the first distance and the second distance, and 2, when it is determined that the first frequency band and the second frequency band overlap at least partially, the secondary user's wireless communication interferes with the primary user's wireless communication. The communication arbitration apparatus according to claim 2, which is determined to be.   The first distance is a radius of a circle that defines the communication range of the primary user, and the second distance is a radius of a circle that defines the communication range of the secondary user. The communication arbitration device according to claim 2 or claim 3. It is parallel to a straight line connecting the center of the communication range of the primary user and the center of the communication range of the secondary user, and from the center of the communication range of the primary user, A distance from a center of the communication range of the primary user to a line defining the communication range of the primary user in a direction toward the center of the communication range is a first distance, and is parallel to the straight line; and From the center of the secondary user communication range to the line defining the communication range of the secondary user in the direction from the center of the communication range of the secondary user toward the center of the communication range of the primary user. When the distance is the second distance and the distance between the center of the primary user communication range and the center of the secondary user communication range is the third distance,
The arbitration unit determines whether or not the third distance is equal to or less than a sum of the first distance and the second distance, and according to the determination result, the second user's radio Arbitrate the communication conditions of the secondary user's wireless communication by either stopping the communication, adjusting the transmission power of the secondary user's wireless communication, or adjusting the directivity of the radio wave of the secondary user's wireless communication. The communication arbitration apparatus according to any one of claims 1 to 4.   When the arbitration unit determines that the third distance is equal to or less than a sum of the first distance and the second distance, the secondary user is stopped by the wireless communication of the secondary user. When the communication condition of the wireless communication is arbitrated and it is determined that the third distance is not less than or equal to the sum of the first distance and the second distance, a trajectory of the communication range of the primary user over time Further determines whether the secondary user passes through the center of the communication range of the secondary user, and adjusts the transmission power in the wireless communication of the secondary user and the wireless of the secondary user according to the determination result. The communication arbitration apparatus according to claim 5, wherein the communication condition of the secondary user's wireless communication is arbitrated by any of adjustment of radio wave directivity in communication.   When the arbitration unit determines that the trajectory of the communication range of the primary user passes through the center of the communication range of the secondary user, the arbitration unit adjusts the transmission power in the wireless communication of the secondary user by adjusting the transmission power. When the communication condition of the secondary user's wireless communication is arbitrated and it is determined that the trajectory of the communication range of the primary user does not pass through the center of the secondary user's communication range, the secondary user The communication arbitration apparatus according to claim 6, wherein the communication condition of the secondary user's wireless communication is adjusted by adjusting radio wave directivity in the wireless communication.   The arbitration means sets communication conditions for the secondary user's wireless communication by either adjusting transmission power in the secondary user's wireless communication or adjusting radio wave directivity in the secondary user's wireless communication. When arbitration is performed, the secondary user is further arbitrated so that the secondary user can perform radio communication sharing a frequency band with the primary user by changing to multi-hop radio communication, and the secondary user's radio communication When the communication condition of the secondary user's wireless communication is arbitrated by the stop, the arbitration is further performed so that the secondary user can perform wireless communication sharing the frequency band with the primary user by changing the wireless communication network. The communication arbitration apparatus according to claim 6 or 7. Based on the communication range of the primary user and the communication range of the secondary user, the determination unit determines whether the secondary user's wireless communication interferes with the primary user's wireless communication. A first step;
When the arbitrating means determines that the wireless communication of the secondary user interferes with the wireless communication of the primary user when the determining means determines that the wireless communication of the primary user and the wireless communication of the secondary user are A program for causing a computer to execute a second step of mediating communication conditions of wireless communication of the secondary user so as to avoid interference. It is parallel to a straight line connecting the center of the communication range of the primary user and the center of the communication range of the secondary user, and from the center of the communication range of the primary user, A distance from a center of the communication range of the primary user to a line defining the communication range of the primary user in a direction toward the center of the communication range is a first distance, and is parallel to the straight line; and From the center of the secondary user communication range to the line defining the communication range of the secondary user in the direction from the center of the communication range of the secondary user toward the center of the communication range of the primary user. When the distance is the second distance and the distance between the center of the primary user communication range and the center of the secondary user communication range is the third distance,
In the first step, the determination unit performs a first determination process for determining whether the third distance is equal to or less than a sum of the first distance and the second distance; In the first determination process, when it is determined that the third distance is less than or equal to the sum of the first distance and the second distance, the wireless communication of the secondary user is the primary use. The program for making the computer of Claim 9 determine that it interferes with a person's radio | wireless communication.   In the first step, the determination means includes at least a part of a first frequency band used for wireless communication of the primary user and a second frequency band used for wireless communication of the secondary user. 2nd determination processing which determines whether it overlaps with each other, and in the 1st determination processing, the 3rd distance is below the sum of the 1st distance and the 2nd distance. And when the second determination process determines that the first frequency band and the second frequency band overlap at least partially, wireless communication of the secondary user is performed in the primary The program for making a computer run of Claim 10 determined to interfere with a user's radio | wireless communication.   The first distance is a radius of a circle that defines the communication range of the primary user, and the second distance is a radius of a circle that defines the communication range of the secondary user. A program for causing a computer according to claim 10 or claim 11 to execute. It is parallel to a straight line connecting the center of the communication range of the primary user and the center of the communication range of the secondary user, and from the center of the communication range of the primary user, A distance from a center of the communication range of the primary user to a line defining the communication range of the primary user in a direction toward the center of the communication range is a first distance, and is parallel to the straight line; and From the center of the secondary user communication range to the line defining the communication range of the secondary user in the direction from the center of the communication range of the secondary user toward the center of the communication range of the primary user. When the distance is the second distance and the distance between the center of the primary user communication range and the center of the secondary user communication range is the third distance,
In the second step, the arbitration unit determines whether the third distance is equal to or less than a sum of the first distance and the second distance, and according to the determination result, The secondary user's wireless communication is stopped, the secondary user's wireless communication is adjusted for transmission power, or the secondary user's wireless communication is adjusted for radio wave directivity. The program for making a computer run in any one of Claims 9-12 which mediates the communication conditions of radio | wireless communication.   In the second step, the arbitration means determines that the third distance is less than or equal to the sum of the first distance and the second distance, and the second user's wireless communication When the communication condition of the wireless communication of the secondary user is arbitrated by the stop and it is determined that the third distance is not less than or equal to the sum of the first distance and the second distance, the primary user And further determining whether or not the trajectory of the communication range of time passes through the center of the communication range of the secondary user, and adjusting the transmission power in the wireless communication of the secondary user according to the determination result, The program for causing a computer to execute the method according to claim 13, wherein the communication condition of the secondary user's wireless communication is adjusted by any one of adjustment of radio wave directivity in the wireless communication of the secondary user.   In the second step, the arbitration unit determines that the trajectory of the communication range of the primary user passes through the center of the communication range of the secondary user. The communication condition of the secondary user's wireless communication is arbitrated by adjusting the transmission power in, and it is determined that the trajectory of the communication range of the primary user does not pass through the center of the secondary user's communication range. The program for causing a computer to execute the method according to claim 14, wherein the communication condition of the secondary user's wireless communication is adjusted by adjusting radio wave directivity in the secondary user's wireless communication.   In the second step, the arbitration unit is configured to adjust the transmission power in the secondary user's wireless communication and adjust the radio wave directivity in the secondary user's wireless communication. When the communication condition of the wireless communication is adjusted, the secondary user is further arbitrated so that the secondary user can perform wireless communication sharing the frequency band with the primary user by changing to the multi-hop wireless communication. When the communication condition of the secondary user's wireless communication is adjusted by stopping the secondary user's wireless communication, the secondary user shares the frequency band with the primary user by changing the wireless communication network. The program for making a computer run according to Claim 14 or Claim 15 which mediates so that radio | wireless communication can be performed.   The computer-readable recording medium which recorded the program of any one of Claims 9-16. p transmission powers of p primary users (p is a positive integer), q location information of q (q is a positive integer) secondary users, and the q secondarys Data structure including q received power of radio waves detected by a user, q antenna gains of the q secondary users, and q transmission powers of the q secondary users Because
The q pieces of position information and the q pieces of received power are used by the calculating means to calculate the position of the primary user comprising a weighted average of the q pieces of position information with the received power as a weight. ,
The q pieces of position information and the position of the primary user are calculated by calculating the distance between the center of the communication range of the primary user and the center of the q communication ranges of the q secondary users. Is used to calculate
The p transmission powers and the q reception powers are used by the calculating means to calculate p communication ranges of the p primary users,
The q antenna gains and the q transmission powers are used by the calculating means to calculate q communication ranges of the q secondary users,
The distance, the p communication ranges, and the q communication ranges are equal to or less than a sum of any one of the p communication ranges and the q communication ranges in which the distances interfere with each other. Is used to execute a first determination process for determining whether or not
When the determination unit determines in the first determination process that the distance is less than or equal to the sum of any of the p communication ranges and the q communication ranges that interfere with each other, the primary A data structure for determining that a user's wireless communication and the secondary user's wireless communication interfere with each other.   19. The data structure of claim 18, wherein each of the p communication ranges and the q communication ranges comprises a communication range radius having a circular shape.   The distance, the p number of communication ranges, and the q number of communication ranges are further determined so that the arbitrating means avoids interference between the primary user's wireless communication and the secondary user's wireless communication. 20. The data structure according to claim 18 or 19, which is used for arbitrating communication conditions of a next user's wireless communication. The data structure further includes p frequency bands of radio waves transmitted from the p primary users and q frequency bands of radio waves transmitted from the q secondary users. ,
For the p frequency bands and the q frequency bands, the determination unit determines whether at least a part of any of the p frequency bands overlaps with any of the q frequency bands. Used to further execute the second determination process,
The determination unit determines that the distance is less than or equal to a sum of any of the p communication ranges and the q communication ranges that interfere with each other in the first determination process; and When it is determined in the determination process 2 that at least a part of any one of the p frequency bands and any of the q frequency bands overlaps, the wireless communication of the primary user and the wireless of the secondary user The data structure according to any one of claims 18 to 20, wherein the data structure is determined to interfere with communication.

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