JP6432085B2 - Use resource acquisition device, use resource acquisition method, and program - Google Patents

Description

  The present invention relates to a utilization resource acquisition device that acquires a utilization resource amount of a wireless resource for each wireless communication scheme.

  Conventionally, in order to realize wireless communication that satisfies the user's experience quality (QoE), it has been predicted whether or not the wireless communication of the own cell can be accommodated according to the usage state of the wireless resource. Specifically, using the current radio resource usage status of its own cell and the current radio resource usage status of another cell (interfering cell), a relational expression indicating the relationship between the two usage statuses is identified, and It is known to make predictions about the availability of wireless communication using the specified relational expression and the boundary line indicating the relationship between the usage status of the own cell and the usage status of other cells according to the boundary of availability. (For example, refer to Patent Document 1 and Non-Patent Document 1).

  In addition, in order to improve the prediction accuracy of such accommodation availability, it is also known to adjust the boundary line depending on whether or not the wireless communication can be accommodated by assigning radio resources according to the prediction (for example, non-patent literature) 2).

Japanese Patent Laying-Open No. 2015-50502

Mariko Sekiguchi, Hitoshi Yano, Masayuki Ariyoshi, Kiyoshi Kobayashi, “Achieving QoS Forecast Techniques for Wireless LANs for Improving Application Operation Quality in Frequency Sharing Environments”, IEICE, Software Radio Society (SR), SR2013-36, p91-98, July 2013 Hitoshi Yano, Mariko Sekiguchi, Masayuki Ariyoshi, Kiyoshi Kobayashi, “Prediction of Predictable Application in Consideration of Required QoE Satisfaction Rate in Wireless LAN”, IEICE, Software Radio Society, Vol. 113, no. 400, p43-50, SR2013-85, January 2014

However, in the prediction of whether or not the wireless communication can be accommodated, a difference in wireless communication method has not been considered. For wireless communication of different wireless communication schemes, for example, there may be little influence on mutual communication quality, or there may be a great influence on at least one communication quality. Therefore, when the possibility of accommodation is predicted without considering the difference in wireless communication method, for example, wireless communication may be excessively limited, and the communication quality of other wireless communication is more than expected. It may be lowered.
Generally speaking, when performing processing related to radio resource allocation, such as prediction of whether radio communication can be accommodated, the wireless communication usage status for each wireless communication method is acquired in consideration of the characteristics of each wireless communication method. It was requested.

  The present invention has been made in accordance with the above situation, and provides a utilization resource acquisition device and the like that can acquire the utilization state of wireless communication for each wireless communication method in consideration of the characteristics of each wireless communication method. For the purpose.

In order to achieve the above object, a utilization resource acquisition device according to the present invention uses a wireless communication unit that performs wireless communication, and a received signal received by the wireless communication unit, to determine the amount of wireless resources that are used for wireless communication. An acquisition unit that acquires a certain usage resource amount for each wireless communication method, and a change unit that increases or decreases the usage resource amount of the target wireless communication method among the usage resource amounts for each wireless communication method acquired by the acquisition unit And, for the wireless communication scheme to be changed, outputs the usage resource amount changed by the changing portion, and for the wireless communication scheme not changed, an output portion that outputs the usage resource amount acquired by the acquisition portion, It is provided.
With such a configuration, it is possible to acquire the usage resource amount for each wireless communication method. In addition, for at least some wireless communication systems, the usage resource amount is changed according to the characteristics of the wireless communication system, so that, for example, the output usage resource amount is used as it is for the prediction of the conventional accommodation possibility. By doing so, it is possible to realize appropriate control in consideration of the characteristics of the wireless communication system.

In the utilization resource acquisition apparatus according to the present invention, the changing unit may reduce the utilization resource amount of the wireless communication scheme for a wireless communication scheme that does not affect the quality of mutual wireless communication even when mixed with a predetermined wireless communication scheme. For a wireless communication system that decreases and deteriorates the quality of wireless communication when mixed with a predetermined wireless communication system, the use resource amount of the wireless communication system may be increased.
With such a configuration, the amount of resources used can be increased or decreased in consideration of the relationship with a predetermined wireless communication method. For example, even if Bluetooth (registered trademark) and a wireless LAN are mixed, there is little deterioration in transmission characteristics of both, and therefore, when a predetermined wireless communication method is a wireless LAN, even if the amount of resources used for Bluetooth is reduced. Good. For example, when IEEE 802.15.4 and a wireless LAN are mixed, a significant frame loss occurs only for IEEE 802.15.4. Therefore, when the predetermined wireless communication method is a wireless LAN, IEEE 802.15.4 is used. The amount of resources used may be increased.

In the utilization resource acquisition apparatus according to the present invention, the decrease in the utilization resource amount may be to minimize the utilization resource amount, and the increase in the utilization resource amount may be to maximize the utilization resource amount.
With such a configuration, for example, when there are mixed wireless communication methods that do not affect the quality of mutual wireless communication, the availability determination is performed using the amount of resource used for each output wireless communication method. Therefore, the wireless communication that can be accommodated can be increased. Also, for example, when radio communication schemes that affect the quality of at least one radio communication are mixed, the allocation of radio resources is controlled using the amount of used resources for each output radio communication scheme It is possible to secure a communication opportunity of a wireless communication system that is affected by wireless communication of other systems.

The utilization resource acquisition apparatus according to the present invention may further include a control unit that performs control related to radio resource allocation using the utilization resource amount output by the output unit.
With such a configuration, it is possible to perform control related to radio resource allocation in consideration of characteristics for each radio communication scheme. Since the output usage resource amount is appropriately changed in consideration of the characteristics of each wireless communication method, the control unit may perform conventional control.

  Further, in the utilization resource acquisition device according to the present invention, the acquisition unit includes a spectrogram acquisition unit that acquires a spectrogram related to a received signal received by the wireless communication unit, and a change in a time direction of the spectrogram acquired by the spectrogram acquisition unit from a threshold value. Transmitting from the transmission start time detected by the time detection unit and the transmission start time detected by the time detection unit, the transmission start time when the large increase is continuous in the frequency direction, and the transmission end time when the decrease larger than the threshold is continuous in the frequency direction In the spectrogram up to the end point, a spectrum acquisition unit that acquires a frequency spectrum according to the maximum value at each frequency, and a wireless communication method detection unit that detects a wireless communication method corresponding to the frequency spectrum acquired by the spectrum acquisition unit; Detected by the wireless communication method detector For each line communication system, the utilization resource acquisition unit that acquires utilization resource amount using the transmission start time and transmission end time detected by the time detecting unit may be provided.

  According to the utilization resource acquisition apparatus and the like according to the present invention, it is possible to acquire the utilization status of wireless communication for each wireless communication method in consideration of the characteristics of each wireless communication method.

The block diagram which shows the structure of the utilization resource acquisition apparatus by embodiment of this invention The block diagram which shows the structure of the acquisition part in the embodiment The flowchart which shows operation | movement of the utilization resource acquisition apparatus by the embodiment The flowchart which shows operation | movement of the utilization resource acquisition apparatus by the embodiment The flowchart which shows operation | movement of the utilization resource acquisition apparatus by the embodiment The flowchart which shows operation | movement of the utilization resource acquisition apparatus by the embodiment The flowchart which shows operation | movement of the utilization resource acquisition apparatus by the embodiment The flowchart which shows operation | movement of the utilization resource acquisition apparatus by the embodiment The figure for demonstrating acquisition of the amount of resources which can be added in the embodiment The figure for demonstrating the relationship between wireless LAN and Bluetooth in the embodiment The figure for demonstrating the relationship between wireless LAN and Bluetooth in the embodiment Schematic diagram showing an example of the appearance of the computer system in the embodiment The figure which shows an example of a structure of the computer system in the embodiment

  Hereinafter, the utilization resource acquisition apparatus by this invention is demonstrated using embodiment. In the following embodiments, components and steps denoted by the same reference numerals are the same or equivalent, and repetitive description may be omitted. The used resource acquisition apparatus according to the present embodiment acquires the used resource amount of the radio resource for each radio communication method, and changes the used resource amount for the radio communication method to be changed.

  FIG. 1 is a block diagram showing a configuration of a used resource acquisition apparatus 1 according to this embodiment. The use resource acquisition device 1 according to the present embodiment includes a wireless communication unit 11, an acquisition unit 12, a change unit 13, an output unit 14, a storage unit 15, and a control unit 16. The use resource acquisition device 1 may be, for example, a radio base station such as an access point, a terminal device such as a station, or a use resource without performing radio communication such as a radio base station. The apparatus which performs the process which acquires quantity may be sufficient. In the present embodiment, a case where the use resource acquisition device 1 is a radio base station that performs radio communication with a terminal device will be mainly described. In the present embodiment, the case where the use resource acquisition device 1 is a device that performs wireless communication in an autonomous distributed wireless network is mainly described, but this need not be the case. The wireless communication may be, for example, wireless LAN (IEEE 802.11) communication, Bluetooth communication, or IEEE 802.15.4 communication (for example, ZigBee (registered trademark) communication). There may be. In the present embodiment, a case where the use resource acquisition apparatus 1 performs wireless LAN communication will be mainly described. In addition, the wireless network may be an environment in which other wireless systems are mixed. That is, many wireless communication devices may share the same frequency band.

  The wireless communication unit 11 performs wireless communication. For example, the wireless communication unit 11 may perform wireless communication with one or more terminal devices. The wireless communication may be wireless LAN communication as described above. Further, the wireless communication unit 11 may perform wireless communication by CSMA / CA (Carrier Sense Multiple Access / Collision Avoidance) or CSMA / CD (Carrier Sense Multiple Access / Collision Detection), for example. The wireless communication unit 11 normally receives or transmits a wireless signal. For example, when the use resource acquisition device 1 is not a device that performs wireless communication such as a wireless base station or a terminal device, the wireless signal May only be received. Moreover, the frequency of the radio signal does not matter. The frequency of the radio signal may be, for example, the ISM band or another frequency.

  Note that the wireless communication unit 11 may or may not include a wireless communication device for performing communication. The wireless communication unit 11 may be realized by hardware, or may be realized by software such as a driver that drives a communication device.

  Using the received signal received by the wireless communication unit 11, the acquisition unit 12 acquires the usage resource amount for each wireless communication method. The wireless communication system is a standard or format of wireless communication, and includes, for example, wireless LAN, Bluetooth, IEEE 802.15.4, and the like. The used resource amount is the amount of radio resources used for radio communication. In the following description, the amount of radio resources is usually the amount of radio resources in the time direction. The amount of the radio resource may be, for example, the ratio of radio resources in the time direction (for example, utilization rate), may be the time of radio resources per unit time (for example, utilization time), and the radio resource Other information regarding the time direction may be used. Further, the amount of radio resources may be a representative value of the amount of radio resources, for example. The representative value may be, for example, an average value or a median value.

  FIG. 2 is a block diagram illustrating an example of a detailed configuration of the acquisition unit 12. In FIG. 2, the acquisition unit 12 includes a spectrogram acquisition unit 21, a time point detection unit 22, a spectrum acquisition unit 23, a feature amount acquisition unit 24, a storage unit 25, a wireless communication method detection unit 26, and a usage resource acquisition. Part 27.

  The spectrogram acquisition unit 21 acquires a spectrogram related to the received signal received by the wireless communication unit 11. The spectrogram is a time series of frequency characteristics at each time. The frequency characteristic is some characteristic quantity in the frequency domain of the received signal received, and may be, for example, power per unit frequency or some characteristic quantity related to power and phase. Therefore, the spectrogram may be a power (frequency power spectrogram) indicating power related to a received signal received in the frequency domain and the time domain. In the present embodiment, the case where the spectrogram is a frequency power spectrogram will be mainly described. The spectrogram acquisition unit 21 may acquire the spectrogram, for example, by performing Fourier transform on the received signal received every predetermined time. The Fourier transform may be, for example, a discrete Fourier transform (DFT) or a fast Fourier transform (FFT). Further, the spectrogram acquisition unit 21 may acquire the spectrogram by measuring the transmitted power of the plurality of bandpass filters. Further, the acquired spectrogram may be stored in a recording medium (not shown).

  In the time direction change of the spectrogram acquired by the spectrogram acquisition unit 21, the time point detection unit 22 has a transmission start time when an increase larger than the threshold is continuous in the frequency direction, and a decrease larger than the threshold is continuous in the frequency direction. Detect the end of transmission. The increase or decrease is strictly an increase or decrease in the spectrogram signal (for example, power value). Further, the decrease greater than the threshold is a decrease in which the absolute value of the decrease amount is greater than the threshold. The threshold value used in the determination regarding the increase and the threshold value used in the determination regarding the decrease may be the same or different. Even in the latter case, both threshold values are preferably approximate values. The processing of this time detection unit 22 will be specifically described.

First, the time point detection unit 22 calculates a variation in the time direction in the spectrogram (hereinafter also referred to as “time variation”). The time variation may be anything as long as it shows changes such as increase or decrease in the power value in the time direction in the spectrogram, for example, by the ratio or difference of adjacent power values in the time direction. It may be a differential value of the power value in the time direction. For example, the time variation Δ ^t p _{i, j} (dB) may be expressed by the following equation. Note that the calculated time variation ^Δt p _{i, j} may be stored in a recording medium (not shown).
Δ ^t p _{i, j} = p _{i, j + 1} −p _{i, j} [dB]

Here, p _{i, j} (dB) is a power value in which the frequency is i and the time is j in the spectrogram acquired by the spectrogram acquisition unit 21. The frequency may be increased or decreased by increasing i by 1. In the present embodiment, the former case will be mainly described. Further, it is preferable that the amount of change in frequency when i increases or decreases by 1 is constant. Further, as j increases by 1, time may increase or decrease. In the present embodiment, the former case will be mainly described. Further, it is preferable that the amount of change in time when j increases or decreases by 1 is constant. The increase or decrease in the time direction of the spectrogram is calculated from this Δ ^t pi _{, j} . It should be noted that when Δ ^t p _{i, j} is positive, it increases, and when Δ ^t p _{i, j} is negative, it decreases. When Δ ^t p _{i, j} is 0, neither increase nor decrease is found. In the above equation, subtraction is performed because the power value is displayed in logarithmic display (dB). However, when the power value is displayed in non-logarithm (W), ^Δt p _{i, j} = p _{i, As shown in j + 1} / pi _{, j} , it indicates the fluctuation ratio of the power value. Therefore, it can be said that the time fluctuation in the above equation indicates the fluctuation ratio of the power value in the time direction.

Further, the time point detection unit 22 acquires the next s _{i, j} . The acquired _{si, j} may be stored in a recording medium (not shown). Note that the power value at time j when s _{i, j} = 1 is larger than the threshold Δ ^t p _th in the time direction, and the power value at time j when s _{i, j} = −1 is equal to the time direction. In this case, the threshold value ^Δt p _th is greatly decreased. Therefore, by obtaining s _{i, j} , each frequency and each time of the spectrogram is increased (s _{i, j} = + 1) and decreased (s _{i, j} = −1), which is larger than the threshold value of the power value. (S _{i, j} = 0). Note that Δ ^t p _th is a positive real number.

In addition, the time point detection unit 22 calculates the next n _j for each preset frequency band using the acquired s _{i, j} . The frequency band is a frequency band corresponding to each wireless communication method. In addition, it is preferable that the frequency band corresponding to a certain wireless communication system is set to a band that includes all the frequencies of the wireless signals of the wireless communication system. When a certain wireless communication system has two or more channels, the frequency band may be a frequency band for each channel. The plurality of frequency bands may include, for example, frequency bands that are in an inclusive relationship, or may include frequency bands in which at least some of the frequencies overlap.

Here, i _min is a value of the frequency i corresponding to the lower limit frequency of the frequency band, and i _max is a value of the frequency i corresponding to the upper limit frequency of the frequency band. This n _j is a value indicating the degree of continuous increase or decrease in the time direction that is greater than the power value threshold in the frequency band from i _min to i _max of time j. Therefore, this n _j can be considered as a continuous index in the frequency direction with time fluctuations larger than the threshold value of the power value in a certain frequency band. At time _j where n _j is greater than the threshold, that is, time j where n _j > n _th , the time direction increase greater than the threshold is continuous in the frequency direction. It can be considered as the signal transmission start time (rising time). Therefore, the time point detection unit 22 detects the transmission start time point at time j where n _j > n _th . Further, at time _j where n _j is smaller than the threshold value, that is, time j where n _j <−n _th , the time direction decrease larger than the threshold value continues in the frequency direction. Can be considered as a wireless signal transmission end point (falling point). Therefore, the time point detection unit 22 detects a transmission end time point that is a time j where n _j <−n _th . The detection of the time point may be, for example, accumulating a value of j corresponding to the time point in a recording medium (not shown), or information indicating that the detection is performed in j corresponding to the time point. (Flag etc.) may be set. The threshold value n _th is a positive real number. More specifically, the threshold value n _th is i _max -i _min following values, it is preferable that a value close to i _max -i _min. Therefore, the threshold value n _th usually has a different value for each frequency band. In addition, in a certain frequency band, an increase or decrease that is greater than the threshold value is continuous. In all of the frequency bands, fluctuations in the time direction are an increase that is greater than the threshold value or a decrease that is greater than the threshold value. Alternatively, the variation in the time direction may be an increase larger than the threshold value or a decrease larger than the threshold value over a wide range that is not all of the frequency band. In the latter case, a part of the frequency band may include a frequency where s _{i, j} = 0.

The spectrum acquisition unit 23 acquires a frequency spectrum corresponding to the maximum value at each frequency in the spectrogram from the transmission start point to the transmission end point detected by the time point detection unit 22. In addition, the acquisition of the frequency spectrum is normally performed in the frequency band used when acquiring the transmission start time and the transmission end time. For example, assuming that the frequency of the frequency band is from i _min to i _max , the transmission start time is j _min , and the transmission end time is j _max , the spectrum acquisition unit 23 performs the processing from i _min to i _max . for each frequency, respectively to obtain power values p _i time to j _max, the maximum value p _i ^max of _j from j _min. A set of maximum values p _i ^max at each frequency from i _min to i _max obtained in this manner is a frequency spectrum. Hereinafter, for convenience of explanation, the maximum value p _i ^max may be simply referred to as p _i . In addition, when a plurality of transmission start points and transmission end points are detected for a certain frequency band, the spectrum acquisition unit 23 determines the interval between the transmission start point and the most recent transmission end point thereafter. For each of these periods, the process of acquiring the frequency spectrum may be repeated. If the period from the transmission start time to the most recent transmission end time thereafter is shorter than a predetermined threshold value, the frequency spectrum may not be acquired for that period. This is because when the number of data is small, the frequency spectrum cannot be acquired appropriately. In addition, when detection of the transmission start time and the like is performed for a plurality of frequency bands, the spectrum acquisition unit 23 acquires the frequency spectrum for each frequency band acquired at the transmission start time and the transmission end time. May be repeated.

  Here, the merit of acquiring such a frequency spectrum will be briefly described. Usually, it is considered that the frequency spectrum of the communication signal can be obtained by acquiring the frequency spectrum that is the power value in the frequency direction at a certain point in time for a certain communication signal, but due to the influence of modulation, fading, etc. The frequency spectrum may be different from the ideal one. On the other hand, as described above, by collecting the maximum values at each frequency and configuring the frequency spectrum, an ideal frequency spectrum that appropriately shows the characteristics of the wireless communication system without being affected by modulation or fading is obtained. Can be acquired. Note that the frequency spectrum acquired by the spectrum acquisition unit 23 is used to detect a wireless communication method, as will be described later. Therefore, by acquiring an ideal frequency spectrum that appropriately represents the characteristics of the wireless communication system, it is possible to realize highly accurate detection of the wireless communication system.

The feature amount acquisition unit 24 acquires a feature amount of wireless communication corresponding to the frequency spectrum from the frequency spectrum acquired by the spectrum acquisition unit 23. When a plurality of frequency spectra are acquired, the feature amount acquisition unit 24 may acquire a feature amount for each frequency spectrum. The feature amount may include, for example, a fluctuation in the frequency direction of the frequency spectrum, may include the center frequency of the frequency spectrum, and information obtained from the shape of the frequency spectrum (for example, a bandwidth at −3 dB) Etc.) and other information that can be acquired from the frequency spectrum may be included. The feature amount may include information other than information that can be acquired from the frequency spectrum. The information may be, for example, a period from the wireless signal transmission start time to the transmission end time, or may be other information. In the present embodiment, the case where the feature amount is a fluctuation in the frequency direction of the frequency spectrum acquired by the spectrum acquisition unit 23 will be mainly described. Hereinafter, this variation is sometimes referred to as “frequency variation”. The frequency fluctuation may be anything as long as the change in the power value in the frequency direction in the frequency spectrum can be understood, for example, the ratio or difference between adjacent power values in the frequency direction. The differential value of the power value in the frequency direction may be used. The frequency fluctuation indicates an increase or decrease in the power value in the frequency direction in the frequency spectrum. For example, the frequency fluctuation Δ ^f p _i (dB) may be expressed by the following equation.
Δ ^f p _i = p _{i + 1} −p _i [dB]

Here, p _i (dB) is a power value having a frequency i in the frequency spectrum acquired by the spectrum acquisition unit 23. Further, in the above formula, although a subtraction because of the power value on the logarithm (dB), the display is not a logarithmic power value (W), the ^{_{Δ f p i = p i +}} 1 / p i This is the same as in the case of time variation. Therefore, it can be said that the frequency fluctuation in the above equation indicates the fluctuation ratio of the power value in the frequency direction.

In the storage unit 25, range information indicating the range of the feature amount is stored for each wireless communication method. As will be described later, when the feature amount acquired by the feature amount acquisition unit 24 is included in certain range information, the wireless communication method corresponding to the feature amount is the wireless communication method corresponding to the range information. It will be detected. Accordingly, the range information includes, for example, all of the feature quantities corresponding to many received signals related to wireless communication by the wireless communication method corresponding to the range information, and is included in received signals related to wireless communication by other wireless communication methods. The corresponding feature amount may be set not to be included. The range information is preferably information indicating a range for each piece of information included in the feature amount. For example, when the center frequency of the frequency spectrum is included in the feature quantity, the range information may be information having a lower limit value and an upper limit value of the center frequency corresponding to the wireless communication scheme corresponding to the range information. In addition, when the feature amount includes a frequency direction variation of the frequency spectrum, the range information includes an upper limit threshold and a lower limit for each frequency regarding the frequency direction variation of the frequency spectrum according to the wireless communication scheme corresponding to the range information. Information having a threshold may be used. Specifically, the range information corresponding to a certain wireless communication method may have an upper limit threshold Δ ^f p _i ^max and a lower limit threshold Δ ^f p _i ^min for frequency fluctuation (dB) for each frequency. . In such a case, the range information may have an upper limit threshold and a lower limit threshold for all frequencies i in the frequency band of the wireless communication scheme corresponding to the range information, or a part of the range information. Only the frequency i may have an upper threshold and a lower threshold. In the latter case, the frequencies corresponding to the upper limit threshold and the lower limit threshold of the frequency variation included in the range information may or may not be equal. In the latter case, for example, an upper limit threshold and a lower limit threshold may be set for each fine frequency for a characteristic portion, and an upper limit threshold and a lower limit threshold may be set for each coarse frequency for a non-characteristic portion. . For example, information described in the following document 1 may be used as the range information.
Reference 1: Akihiro Miyasaka, Hitoshi Yano, Masayuki Ariyoshi, Tomoaki Kumagai, “Performance evaluation of 2.4 GHz band wireless system detection method using power ratio between adjacent time and frequency”, IEICE Technical Report, SR2014-126, p. . 85-91, February 2015

  For example, when there are a plurality of channels as in a wireless LAN, the range information is normally considered to be the same range for each channel except for the shift amount in the frequency direction. Therefore, in such a case, the range information corresponding to a plurality of channels may be range information corresponding to a certain channel and a shift amount in the frequency direction of the range information corresponding to another channel. .

  The process in which the range information for each wireless communication method is stored in the storage unit 25 does not matter. For example, the range information may be stored in the storage unit 25 via a recording medium, or the range information transmitted via a communication line or the like may be stored in the storage unit 25. Alternatively, the range information input via the input device may be stored in the storage unit 25. The storage in the storage unit 25 may be temporary storage in a RAM or the like, or may be long-term storage. The storage unit 25 can be realized by a predetermined recording medium (for example, a semiconductor memory or a magnetic disk).

  The wireless communication method detection unit 26 detects a wireless communication method corresponding to the frequency spectrum acquired by the spectrum acquisition unit 23. Specifically, when the feature amount acquired from the frequency spectrum by the feature amount acquisition unit 24 is included in a range indicated by certain range information, the wireless communication method detection unit 26 selects a wireless communication method corresponding to the range information. Then, it detects as a radio communication system of radio signals corresponding to the frequency spectrum. In addition, when the feature amount includes frequency variation, when the frequency variation of all frequencies is included in the range for each frequency indicated by the range information, it is determined that the feature amount is included in the range indicated by the range information. Or when a frequency fluctuation of a frequency equal to or greater than a threshold (for example, 90% or more) is included in the range for each frequency indicated by the range information, the feature amount is in the range indicated by the range information. It may be determined that it is included. By detecting the wireless communication method, the type (method) of wireless communication corresponding to the received signal is specified. For example, when the feature amount acquired by the feature amount acquiring unit 24 is included in certain range information, the wireless communication method detecting unit 26 sets “IEEE802.802.3” corresponding to the range information as the wireless communication method corresponding to the received signal. 11g CH7 "may be detected. The detection of the wireless communication method may be, for example, storing information indicating the wireless communication method in a recording medium (not shown), or detecting that the information is detected in the information indicating the wireless communication method. The information (flag etc.) to show may be set. The detected wireless communication method is preferably associated with the frequency band corresponding to the frequency spectrum from which the feature amount used for the detection is acquired, and the transmission period specified by the transmission start time and the transmission end time. It is. Note that Bluetooth and IEEE 802.15.4 are distinguished from each other using range information when the former bandwidth is 1 MHz and the latter bandwidth is 2 MHz and the frequency resolution is sufficiently high. Is possible. On the other hand, when the detection target is also Bluetooth with a bandwidth of 2 MHz, such as Bluetooth Low Energy, as described later, Bluetooth and IEEE 802.15.4 are also distinguished using a time residue. It may be.

  The usage resource acquisition unit 27 acquires the usage resource amount using the transmission start point and the transmission end point detected by the time point detection unit 22 for each wireless communication method detected by the wireless communication method detection unit 26. The wireless communication system detection unit 26 acquires the correspondence between the wireless communication system, the frequency band, and the transmission period specified by the transmission start time and the transmission end time. Therefore, the use resource acquisition unit 27 can know the transmission start time and transmission end time for each radio communication scheme for each frequency band. And the utilization resource acquisition part 27 can acquire the utilization resource amount for every wireless communication system by adding the communication period for every wireless communication system for every predetermined unit time about a certain frequency band. . Note that the usage resource amount may be a usage rate or a usage time, as described above. Moreover, the utilization resource acquisition part 27 may perform the process about each frequency band, and may perform it about a part of frequency band. As a result, the usage resource amount for each radio communication scheme is acquired for each frequency band or a part of the frequency bands. Note that the usage resource amount for each wireless communication method may be stored in a recording medium (not shown). Further, as will be described later, when the control unit 16 needs the current own cell use resource amount, the use resource acquisition unit 27, for example, for the radio communication scheme of the own cell, The amount and the amount of other used resources may be acquired separately. In this case, for example, in the wireless communication system detection unit 26, for the wireless communication system of the own cell, the frequency band and transmission period of the own cell and the other frequency band and transmission period are detected separately. May be.

The changing unit 13 uses the amount of used resources for each wireless communication method acquired by the acquiring unit 12, that is, the amount of used resources for each wireless communication method acquired by the used resource acquiring unit 27, of the wireless communication method to be changed. Increase or decrease the amount of resources used. Specifically, the changing unit 13 may reduce the amount of resources used for a wireless communication method that does not affect the quality of wireless communication even if it is mixed with a predetermined wireless communication method. Good. Moreover, the change part 13 may increase the utilization resource amount of the radio | wireless communication system about the radio | wireless communication system which the quality of radio | wireless communication falls when it mixes with the predetermined | prescribed radio | wireless communication system. Here, the fact that the quality of wireless communication is not affected may be that the quality of wireless communication is not affected at all, and may slightly affect the quality of wireless communication, but does not have a significant effect. It may include. In the present embodiment, the latter case will be mainly described. The changing unit 13 may perform both the process of increasing the amount of used resources and the process of decreasing, or may perform only one of them. Note that the predetermined wireless communication method may be, for example, a wireless communication method that is a control target of radio resource allocation using the amount of resource used for each wireless communication method output by the output unit 14. The predetermined wireless communication method may be, for example, a wireless communication method for wireless communication performed by the wireless communication unit 11 of the utilization resource acquisition device 1. In addition, when increasing the usage resource amount, for example, the changing unit 13 may add a positive value to the usage resource amount acquired by the acquisition unit 12 or may multiply a value larger than 1. Alternatively, it may be changed to a predetermined value larger than the acquired usage resource amount. The predetermined value may be a value at which the utilization rate is 100%. Specifically, the changing unit 13 may change the usage resource amount to 100% when the usage resource amount is a usage rate, and when the usage resource amount is a usage time per unit time. The resource usage amount may be changed to unit time. Further, when reducing the usage resource amount, the changing unit 13 may add, for example, a negative value to the usage resource amount acquired by the acquisition unit 12 and multiplying by a positive value less than 1. Alternatively, it may be changed to a predetermined value smaller than the acquired use resource amount. The predetermined value may be a value at which the utilization rate becomes 0%. Specifically, the changing unit 13 may change the usage resource amount, which is the usage rate and usage time, to zero. Further, correspondence information for associating information for identifying the wireless communication method to be changed with the contents of the change is stored in a recording medium (not shown), and the changing unit 13 may change the information using the correspondence information. Specifically, the following correspondence information is stored, and when the usage resource amounts of the wireless communication schemes A1, A2, and A3 are acquired, the changing unit 13 sets the usage resource amount of the wireless communication scheme A1. It may be changed to 0%, and the amount of resources used in the wireless communication method A3 may be changed to 100%. In this case, the wireless communication method A2 is not the wireless communication method to be changed. The wireless communication system A2 may be, for example, the above-described predetermined wireless communication system, or may not be so.
Wireless communication method to be changed Details of change Wireless communication method A1 0%
Wireless communication system A3 100%

More specifically, when the predetermined wireless communication method is a wireless LAN, the changing unit 13 may decrease the amount of used resources of Bluetooth and increase the amount of used resources of IEEE 802.15.4. The reason will be briefly described below.
The influence of the wireless LAN on Bluetooth will be described with reference to FIG. 6A. In FIG. 6A, PN indicates the number of Bluetooth piconets. “No WLAN” refers to the case where only Bluetooth communication is performed, and “Conventional WLAN” refers to wireless LAN communication that does not determine whether or not accommodation is possible and Bluetooth communication at the same time. In this case, “with WLAN for determining availability” is a case where wireless LAN communication for determining availability and Bluetooth communication are performed simultaneously. The wireless LAN communication for determining whether or not accommodation is possible is determined based on the above-described Patent Literature 1 or Non-Patent Literature 1 to determine whether or not accommodation is possible. Sometimes communication is not performed. As can be seen from FIG. 6A, regardless of the number of Bluetooth piconets, it can be seen that the presence or absence of wireless LAN communication does not significantly affect the Bluetooth communication quality (here, throughput).

  Next, the effect of Bluetooth on the wireless LAN will be described with reference to FIG. 6B. In FIG. 6B, it can be seen that the throughput of the conventional wireless LAN does not change even when the number of Bluetooth piconets increases. Therefore, it can be seen that Bluetooth communication does not affect the communication quality of the wireless LAN. On the other hand, in FIG. 6B, for the wireless LAN that determines whether or not accommodation is possible, the throughput of the wireless LAN decreases as the number of piconets increases. This is because the use amount of the wireless resource is voluntarily reduced by considering the use resource amount of Bluetooth when determining whether or not the wireless LAN can be accommodated. Therefore, from the result of FIG. 6B, it can be seen that when wireless LAN and Bluetooth communication are mixed, it is only necessary to determine whether or not the wireless LAN can be accommodated without considering the Bluetooth communication. For this reason, as described above, when the predetermined wireless communication method is a wireless LAN, the use resource amount of Bluetooth may be reduced. As a result of such a decrease, even if the amount of resources used in the wireless LAN increases, the communication quality of Bluetooth is not greatly affected, and the amount of resources used in the wireless LAN can be increased.

It is known that when a wireless LAN and IEEE 802.15.4 are mixed, the packet loss rate of IEEE 802.15.4 is increased. For this, see the following document 2, for example.
Reference 2: Takeshi Yamamoto, Yoshizo Tanaka, Tsuyoshi Kitagawa, Hiromi Yamamoto, Hitoshi Yano, Mariko Sekiguchi, Masahiro Miyasaka, Masayuki Ariyoshi, Tomoaki Kumagai, Hiroshi Okada, “Coexistence of Wireless LAN and Wireless Sensor NW with QoE as Control Index System ", 2015 IEICE General Conference, B-17-8, p. 555, February 2015 In IEEE 802.15.4, there is no chance of transmission of wireless signals when busy, so as can be seen from the experimental results described in that document 2, When mixed, the impact will be greater. Therefore, when IEEE 802.15.4 communication and communication of other wireless communication methods are mixed, IEEE 802.15.4 is used from the viewpoint of reducing packet loss in IEEE 802.15.4 communication. It is preferable to reduce non-radio communication. For this reason, as described above, when the predetermined wireless communication method is a wireless LAN, the use resource amount of IEEE 802.15.4 may be increased. As a result of such an increase, the amount of wireless LAN use resources can be reduced, thereby increasing the number of IEEE 802.15.4 communication opportunities. As a result, the packet loss rate of IEEE 802.15.4 can be reduced. Because it can. Also in Document 2, the IEEE 802.15.4 packet loss rate is reduced by changing the wireless LAN communication channel to eliminate the mixture of IEEE 802.15.4 communication and wireless LAN communication. It has been shown that it can be improved from 17.2% to 0.16%. Therefore, it can be seen that changing the amount of resources used in IEEE 802.15.4 to 100% is very effective from the viewpoint of reducing the packet loss rate of IEEE 802.15.4.

  The output unit 14 outputs the usage resource amount changed by the changing unit 13 for the wireless communication method to be changed, and outputs the usage resource amount acquired by the acquisition unit 12 for the wireless communication method that is not the change target. . As a result, the used resource amount that has been changed or not changed is output for each wireless communication method for which the used resource amount has been acquired by the acquiring unit 12. Note that the output of the changed usage resource amount and the output of the usage resource amount that has not been changed may be performed separately or simultaneously. The output usage resource amount may be used for control of radio resource allocation, as will be described later.

  Here, the output may be, for example, display on a display device (for example, a CRT or a liquid crystal display), transmission via a communication line to a predetermined device, printing by a printer, or output to a recording medium. It may be accumulated or delivered to another component. In the present embodiment, the case where the output is accumulation in the storage unit 15 will be mainly described. The output unit 14 may or may not include an output device (for example, a transmission device or a printer). The output unit 14 may be realized by hardware, or may be realized by software such as a driver that drives the devices.

  The storage unit 15 stores the usage resource amount for each wireless communication method. Specifically, information for associating information for identifying a wireless communication method with the amount of resource used may be stored. The amount of resources used is accumulated by the output unit 14. The storage in the storage unit 15 may be temporary storage in a RAM or the like, or may be long-term storage. The storage unit 15 can be realized by a predetermined recording medium (for example, a semiconductor memory or a magnetic disk).

  The control unit 16 performs control related to radio resource allocation using the usage resource amount output by the output unit 14, that is, the usage resource amount stored in the storage unit 15. The control related to the allocation of radio resources may be, for example, control according to the availability determination described in Patent Document 1, Non-Patent Documents 1 and 2, etc., and the frequency (channel) used in radio communication It may be control related to the change of the wireless resource, or both of them, or other control related to radio resource allocation. For example, when new wireless communication is performed, the control according to the determination of the availability is permitted when the wireless communication is permitted and when the wireless communication is determined to be impossible. The wireless communication may not be permitted. Further, the control related to the change of the frequency used in the radio communication may be to change the frequency used in the radio communication when there is no radio resource available at the frequency currently used in the radio communication. . The change in the frequency may be, for example, a change in a channel used in wireless communication. The wireless communication method to be controlled is usually the predetermined wireless communication method described above. In addition, the utilization resource acquisition apparatus 1 may perform wireless communication by the predetermined wireless communication method, or may be another apparatus. In the latter case, the control unit 16 may perform the control by transmitting an instruction regarding the control to another device. In the present embodiment, a case where the control unit 16 controls wireless communication by the wireless communication unit 11 will be mainly described.

Here, determination of availability is described separately for acquisition of the required resource amount, acquisition of the used resource amount, and acquisition of the addable resource amount.
[Obtain required resource amount]
A method of calculating the required resource amount using offered load, transmission rate, and the like will be described. The offered load is a traffic volume that a device that performs wireless communication intends to transmit, and may be considered to be, for example, a requested data rate of an application layer. For example, when an application requests 10 Mb / s wireless communication, the offered load is “10 Mb / s”. If it is assumed that no retransmission occurs, the transmission time of data and ACK for the data is the usage time of the radio resource, so the radio resource usage rate ρ _{s, n} of the application _n is as follows: .
ρ _{s, n} = Σ {(transmission time of data frame of application n + time required for ACK of data frame of application n) / MT}
MT is a measurement period for calculating a radio resource utilization rate. Also, Σ in the above equation is the sum for the data frame of application n transmitted during the MT period. Therefore, the above equation becomes as follows.
ρ _{s, n} = N _{DATA, n} × (D _{DATA, n} + D _{ACK, n} ) (1)

Here, N _{DATA, n} is the number of data frames that application n transmits in unit time during the measurement period, D _{DATA, n} is the average time it takes to transmit data frames of application n, and D _{ACK, n} Is the time taken to ACK the data frame of application n. D _{ACK, n} is a time uniquely determined only by the transmission rate of ACK. In the equation (1), N _{DATA, n} and D _{DATA, n} are respectively _expressed by the following equations. Incidentally, O _n is an offered load of the application n (b / s), L avg, n is the average packet size of the application n (Byte). In the case of application packets exceeding the MTU size, the average IP packet size may be assumed to be the MTU size. Further, D _fixed is a physical layer overhead (a preamble length) that does not depend on the transmission rate, L _fixed is an overhead other than the physical layer that depends on the transmission rate, and R _n is a transmission rate of application n (b / s). Note that in the application n, when only one of the uplink and downlink radio communications is performed, the transmission rate R _n may be an uplink or downlink transmission rate at which the radio communication is performed. On the other hand, in the application n, when both uplink and downlink radio communications are performed, the transmission rate R _n may be the sum of the uplink and downlink transmission rates at which the radio communication is performed.
_{N DATA, n = O n /} (L avg, n × 8)
D _{DATA, n} = D _fixed + (L _{avg, n} × 8 + L _fixed ) / R _n
Therefore, the radio resource utilization rate of equation (1) is as follows:
ρ _{s, n} = coef _n × O _n / R _n
However, coef _n is as follows.
coef _n = 1 + {(D _fixed + D _{ACK, n} ) × R _n + L _fixed } / (L _{avg, n} × 8)

As described above, the control unit 16 determines the amount of radio resources (required resource amount) necessary for performing wireless communication according to the offered load of the application from the offered load, transmission rate, and average packet size of the application. ) Can be calculated. The offered load and average packet size may be acquired from an application. In addition, the transmission rate is acquired in a device that performs wireless communication of the application (for example, the use resource acquisition device 1 or a device that performs wireless communication with the use resource acquisition device 1). May be. The acquisition is performed by, for example, acquiring RSSI (received signal strength) of a radio signal transmitted from a communication partner (for example, a beacon transmitted from a radio base station) and stored in a recording medium (not shown). The transmission rate corresponding to the acquired RSSI may be obtained by using information that associates the RSSI with the transmission rate (for example, a table that associates both). From the 802.11g data frame format, D _fixed is 16 + 4 = 20 (μs), and L _fixed is {(2 + 24 + 8 + 20 + 8 + 4) × 8 + 6} = 534 (bit). Here, for simplification of description, the padding region is not considered.

[Obtain resource usage]
A method for acquiring the usage resource amount will be described. In addition, although the utilization resource amount for every radio | wireless communication system is output by the output part 14, here, the control part 16 uses the utilization resource amount, current self-cell utilization resource amount, and other others A case of acquiring the cell usage resource amount will be described. The own cell is a cell in which wireless communication is performed by the above-described predetermined wireless communication method, and is normally a cell in which the wireless communication unit 11 of the utilization resource acquisition apparatus 1 performs wireless communication.

  The control unit 16 acquires the current own cell usage resource amount that is the current radio resource usage amount of the own cell with which the used resource acquisition device 1 performs radio communication. This current own cell utilization resource amount may be the latest in the own cell or may be new enough to be identified with the latest one. The utilization rate of the radio resource of the own cell is a value obtained by dividing the time when a device belonging to the own cell performs radio communication by the observation time of the radio communication. The use time of the radio resource of the own cell is the time when a device belonging to the own cell performs radio communication during an observation period which is a unit time. Note that the current own cell usage resource amount is usually information for each channel. In the present embodiment, it is assumed that processing such as acquisition of the current own cell usage resource amount is performed for a predetermined time length (hereinafter sometimes referred to as “control slot”). In that case, it is preferable that the acquisition unit 12 also acquires the use resource amount for each control slot. For example, the control unit 16 may acquire the current own cell use resource amount by specifying the radio communication of the own cell in the use resource amount for each radio communication method stored in the storage unit 15, The current own cell usage resource amount may be acquired according to the carrier sense result, the current own cell usage resource amount may be calculated according to the offered load of wireless communication in the own cell, or other The current own cell usage resource amount may be received from the device. The control unit 16 usually acquires the current own cell usage resource amount for the frequency band (channel) in which the wireless communication unit 11 performs wireless communication. As described above, when the acquisition unit 12 acquires the current own cell usage resource amount and the current other usage resource amount for the radio communication scheme of the own cell, the control unit 16 may use the current own cell usage resource amount acquired by the acquisition unit 12.

  Next, a method of acquiring the current other cell usage resource amount will be described. The control unit 16 obtains the current other cell usage resource amount that is the current radio resource usage amount of another cell that may interfere with the own cell. The current other cell use resource amount may be the latest in other cells, or may be new enough to be identified with the latest one. The other cell may be one cell or two or more cells. The other cell is an interference cell for the own cell, for example, another cell adjacent to the own cell. In addition, the resource usage amount of other cells includes a resource usage amount of wireless communication using a wireless communication scheme different from that of the own cell. That is, wireless communication other than the wireless communication of the own cell is wireless communication of another cell regardless of the wireless communication method. The control unit 16 adds the usage resource amount excluding the current own cell usage resource amount for each wireless communication method in the current usage resource amount for each wireless communication method stored in the storage unit 15, The current other-cell usage resource amount may be acquired. That is, the current amount of other cell usage resources is obtained by subtracting the current own cell usage resource amount from the total of the current usage resource amount stored in the storage unit 15 for each wireless communication method. The total of the currently used resource amounts may be performed, for example, for radio communication in the frequency band of the radio communication of the own cell.

[Get amount of resources that can be added]
Next, a method for acquiring the addable resource amount will be described. The control unit 16 specifies a relational expression indicating the relationship between the own cell use resource amount and the other cell use resource amount using the current own cell use resource amount and the current other cell use resource amount. The relational expression indicating the relationship between the own cell use resource amount and the other cell use resource amount passing through the current own cell use resource amount and the current other cell use resource amount is the current own cell use resource amount and the current other cell use amount. It changes according to the amount of resources used. Specifically, the slope and intercept of the relational expression, which are linear functions, change according to the current own cell usage resource amount and the current other cell usage resource amount that are the starting points. Therefore, the control unit 16 specifies a relational expression indicating the relationship between the own cell use resource amount and the other cell use resource amount that passes through the current own cell use resource amount and the current other cell use resource amount. Will do. This relational expression is, for example, an expression showing a straight line extending from the lower left to the upper right in FIG. For details of the relational expression, see Patent Document 1 and Non-Patent Document 1. As described in Patent Document 1 and Non-Patent Document 1, this relational expression is
y = a (x + c) (2)
Can be described. Note that x is the own cell use resource amount, y is the other cell use resource amount, c is a predetermined constant, and a is the current own cell use resource amount and the current other cell use resource. It is a coefficient determined by the quantity. Here, the coefficient a is normally a positive value. This is because collision of radio signals increases with an increase in the amount of resources used by the own cell, and the amount of resources used by other cells also increases accordingly. From the above equation (2), when the current own cell usage resource amount and the current other cell usage resource amount are x1 and y1, respectively, the control unit 16
a = y1 / (x1 + c)
Thus, the value of the coefficient a can be determined, and as a result, the relational expression (2) can be specified. As described in Patent Document 1 and Non-Patent Document 1, for example, c = 80.45.

The control unit 16 predicts the addable resource amount by using the boundary information stored in the recording medium (not shown), the specified relational expression, and the current own cell use resource amount. As will be described later, the control unit 16 acquires the relational expression specified using the current own cell usage resource amount and the current other cell usage resource amount acquired in a certain control slot, and the control slot. The amount of additional resources that can be added is predicted using the current own cell usage resource amount. Next, boundary information will be described. In FIG. 5, when the own cell use resource amount and the other cell use resource amount are on the lower left side of the boundary line, wireless communication in the own cell can be accommodated, and the own cell use resource amount and the other cell use resource amount are In the case of the upper right side from the boundary line, wireless communication in the own cell cannot be accommodated. Note that “accommodable” means that all traffic to be transmitted can satisfy a desired QoE. In other words, if it can be accommodated, a desired QoE is satisfied in each traffic of wireless communication. On the other hand, if it cannot be accommodated, the desired QoE is not satisfied in at least one of the traffics of wireless communication. For example, QoE may be satisfied when the throughput is greater than a threshold according to the offered load, and QoE may not be satisfied otherwise. The threshold according to the offered load may be, for example, the offered load itself or may be a value obtained by multiplying the offered load by a value close to 1. The boundary line is a line indicating the boundary between the use situation that can be accommodated and the use situation that cannot be accommodated. The information indicating the relationship between the own cell use resource amount and the other cell use resource amount corresponding to the boundary line is the boundary information. Therefore, as described above, when x is the own cell use resource amount and y is the other cell use resource amount, the equation corresponding to the boundary line is y = F (x) (3)
May be used as boundary information. The function F may be a linear function as shown in FIG. For example, when p and q are arbitrary real numbers, F (x) = px + q may be satisfied. That is,
y = px + q
It may be. In such a case, the boundary information may be information indicating p and q. In the present embodiment, the case where the boundary information is a linear function will be mainly described. The boundary line shown in FIG. 5 is, for example, the following equation (see Patent Document 1 and Non-Patent Document 1).
y = −1.1 × x + 73.137
In addition, as described in Non-Patent Document 2, when the boundary information is adjusted, the control unit 16 may predict the amount of resource that can be added using the adjusted boundary information. Good.

  The control unit 16 acquires the maximum amount of radio resources that can be accommodated in the own cell, and uses this to acquire the amount of resources that can be added in the own cell. Since the boundary indicated by the boundary information indicates the accommodation limit, the maximum amount of radio resources that can be accommodated in the own cell (for example, x2 in FIG. 5 or the like) is obtained by obtaining the intersection between the expressions (2) and (3). x3) can be obtained. Then, a value (for example, x2-x1) obtained by subtracting the current own cell use resource amount (for example, x1 in FIG. 5) acquired by the control unit 16 from the maximum radio resource amount is an addable resource in the own cell. It becomes quantity. In addition, although the control part 16 acquires the amount of resource which can be added normally about a use channel, you may acquire the amount of resource which can be added also about each other channel.

  Moreover, the control part 16 may determine the accommodation availability regarding an additional offered load using the amount of resources which can be added. The additional offered load may be, for example, an offered load of an application that newly communicates or an offered load of a terminal device that wants to newly communicate. For example, as described above, the control unit 16 obtains the required resource amount from the offered load, and when the required resource amount is equal to or less than the addable resource amount, the control unit 16 performs radio communication corresponding to the additional offered load. The start of communication may be permitted, and if not, the start of wireless communication corresponding to the additional offered load may not be permitted. By performing such control, wireless communication satisfying QoE can be realized. In addition, when acquiring the required resource amount from the offered load, the control unit 16 may receive information such as a traffic transmission rate and a packet size according to the offered load and use them. Further, the control unit 16 calculates the own cell use resource amount for the result of adding the current offered load and the additional offered load, and uses the own cell use resource amount and the above relational expression. The other cell use resource amount corresponding to the own cell use resource amount is also calculated, depending on whether the calculated own cell use resource amount and the other cell use resource amount are located on the accommodable side from the boundary line. It may be determined whether to allow wireless communication corresponding to the additional offered load.

  Here, the effect of the change by the changing unit 13 will be briefly described. When the used resource amount before the change by the changing unit 13 is used, it is assumed that the current other cell used resource amount is y1. In that case, as shown in FIG. 5, the amount of resource that can be added is x2-x1. On the other hand, when the used resource amount after the change by the changing unit 13 is used, it is assumed that the current other cell used resource amount is y2 which is smaller than y1. Specifically, even if it is considered that the wireless communication of another cell includes Bluetooth communication and the usage resource amount is changed to 0%, the current usage amount of other cells is reduced to y2. Good. As described above, as a result of the current other cell usage resource amount being changed to y2, the addable resource amount is increased to x3-x1. Therefore, for example, in the own cell, radio resources can be allocated extra by an amount corresponding to x3-x2.

  When the current own cell usage resource amount and the current other cell usage resource amount are present on the side where the boundary line cannot be accommodated, the control unit 16 changes the used frequency band (used channel) of the own cell. May be. The change destination may be determined, for example, by performing spectrum sensing and searching for a free frequency band. For example, if the wireless LAN communication of the own cell and the IEEE 802.15.4 communication are mixed, and the usage resource amount of IEEE 802.15.4 is changed to 100% by the changing unit 13, The own cell use resource amount and the current other cell use resource amount are present on the unaccommodable side of the boundary line. In such a case, the control unit 16 may change the use channel. As described above, as a result of changing the use channel, a communication opportunity of IEEE 802.15.4 is secured, and the packet loss rate of IEEE 802.15.4 is improved. In addition, when the use resource acquisition device 1 is a radio base station, the control unit 16 may change the channel by controlling the radio communication unit 11 to transmit a channel change instruction to each terminal device. Good. Further, when the use resource acquisition device 1 is not a radio base station, the channel change may be performed by instructing the radio base station of the own cell to transmit a channel change instruction to each terminal device of the own cell. Good. Note that the channel change instruction preferably includes a new used channel. In addition, the channel change instruction may include information related to the timing for changing the used channel. This is because the radio base station and each terminal device change the use channel at the same time. The information about the timing may be, for example, a time (period) from when a channel change instruction is received to when the used channel is changed, or a time when the used channel is changed.

  Further, the storage unit 15 and the storage unit 25 may be realized by the same recording medium or may be realized by separate recording media. In the former case, the area that stores the used resource amount is the storage unit 15, and the area that stores the range information is the storage unit 25.

  Next, operation | movement of the utilization resource acquisition apparatus 1 is demonstrated using the flowchart of FIG. In this flowchart, a case where the control unit 16 controls wireless LAN communication performed by the wireless communication unit 11 will be described. Further, in this flowchart, a case will be described in which the change in the usage resource amount by the changing unit 13 is a change to 100% in the case of an increase, and a change to 0% in the case of a decrease.

  (Step S <b> 101) The acquisition unit 12 determines whether to acquire the usage resource amount for each wireless communication method. And when acquiring the utilization resource amount for every radio | wireless communication system, it progresses to step S102, and when that is not right, it progresses to step S107. For example, the acquisition unit 12 may periodically determine to acquire the use resource amount for each wireless communication method, or may determine to acquire the use resource amount for each wireless communication method at other timing. Good.

  (Step S <b> 102) The acquisition unit 12 acquires the use resource amount for each wireless communication method using the reception signal received by the wireless communication unit 11. Details of this processing will be described later with reference to the flowchart of FIG. 4A. For example, the acquisition unit 12 may pass the acquired usage resource amount to the changing unit 13 for the change target, and may pass it to the output unit 14 for the non-change target. You may pass to the change part 13 and the output part 14.

  (Step S103) The changing unit 13 changes the usage resource amount for the wireless communication method to be changed. Details of this processing will be described later with reference to the flowchart of FIG. 4E.

  (Step S104) The output unit 14 outputs the usage resource amount changed by the changing unit 13 for the wireless communication method to be changed, and the used resource acquired by the acquiring unit 12 for the wireless communication method that is not the changing target. Output quantity. In the present embodiment, a case where this output is accumulation in the storage unit 15 will be mainly described.

  (Step S <b> 105) The control unit 16 refers to the use resource amount for each wireless communication method output by the output unit 14, and the use resource amount is 100 in addition to the wireless communication method of the own cell in the channel used by the wireless communication unit 11. It is determined whether there is a wireless communication method that is%. If there is a wireless communication method with a usage resource amount of 100%, it is determined that the channel to be used is changed, and the process proceeds to step S106. Otherwise, the process returns to step S101.

  (Step S106) The control unit 16 changes the channel used by the wireless communication unit 11. Specifically, the control unit 16 controls the wireless communication unit 11 so as to identify a new use channel and transmit a channel change instruction for changing to the specified new use channel to each terminal device. At the same time, the use channel of the wireless communication unit 11 is changed to the specified new use channel. Further, in accordance with the transmitted channel change instruction, the use channel is changed in each terminal device. Then, the process returns to step S101.

  (Step S <b> 107) The control unit 16 determines whether to make a determination regarding whether or not accommodation is possible. If it is determined whether or not accommodation is possible, the process proceeds to step S108. If not, the process returns to step S101. The control unit 16 may, for example, start a new wireless communication (for example, when a new application wants to perform a wireless communication or when there is a request from the terminal device to perform a new wireless communication). Etc.) may be determined to make a determination regarding whether or not accommodation is possible.

  (Step S <b> 108) The control unit 16 determines whether or not accommodation is possible. For example, when it is desired to start a new wireless communication, the control unit 16 may determine whether the new wireless communication can be accommodated.

  (Step S109) The control part 16 performs control according to the determination result of the accommodation possibility. For example, the control unit 16 may control to start a new wireless communication when it is determined that it can be accommodated, and may not start a new wireless communication when it is determined that it cannot be accommodated. You may control. Then, the process returns to step S101.

  In the flowchart of FIG. 3, the process ends when the power is turned off or the process is terminated. Further, the wireless communication unit 11 may perform wireless communication processing other than that included in the flowchart of FIG. For example, when the use resource acquisition apparatus 1 is a radio base station, the radio communication unit 11 may perform processes related to radio communication with each terminal apparatus in addition to the processes included in the flowchart of FIG.

FIG. 4A is a flowchart showing details of the processing for acquiring the usage resource amount (step S102) in the flowchart of FIG.
(Step S201) The wireless communication unit 11 receives a reception signal. In addition, when the length of the time domain of the spectrogram to be acquired is determined, the wireless communication unit 11 may perform reception according to the length. Further, the received signal received may be stored in a recording medium (not shown). For example, a reception signal after AD conversion by an AD conversion unit (not shown) in the wireless communication unit 11 may be stored in a recording medium (not shown).

  (Step S202) The spectrogram acquisition unit 21 acquires a spectrogram related to the received signal. The acquired spectrogram may be stored in a recording medium (not shown).

  (Step S203) The time point detection unit 22 acquires time variation in the acquired spectrogram. The time variation is preferably acquired for each frequency. The acquired time variation may be stored in a recording medium (not shown).

(Step S204) The time point detection unit 22 specifies an increase larger than the threshold or a decrease larger than the threshold from the acquired time variation. Specifically, the time point detection unit 22 may acquire the above-described s _{i, j} .

  (Step S205) The wireless communication method detection unit 26 and the like detect a wireless communication method corresponding to the received signal. Details of this processing will be described later with reference to the flowchart of FIG. 4B.

  (Step S206) The use resource acquisition unit 27 acquires the use resource amount using the transmission start time and the transmission end time for each detected wireless communication method. Then, a series of processes for acquiring the use resource amount for each wireless communication method according to the received signal is completed, and the process returns to the flowchart of FIG.

FIG. 4B is a flowchart illustrating details of the wireless communication method detection process (step S205) in the flowchart of FIG. 4A.
(Step S301) The time detection unit 22 sets the counter k to 1.

(Step S302) The time point detection unit 22 calculates the sum of increases and decreases in the kth frequency band. Specifically, the time point detection unit 22 may calculate n _j that is the sum of the aforementioned s _{i, j in} the kth frequency band. The n _j may be stored in a recording medium (not shown).

(Step S303) In the k-th frequency band, the time point detection unit 22 has a transmission start time point at which an increase larger than the threshold value continues in the frequency direction and a time point when a decrease larger than the threshold value continues in the frequency direction. Is detected. Specifically, when the detection unit 22, and the transmission start time of the n _j> n _th, may detect the transmission end time of the n _j <-n _th. Information indicating the transmission start time and transmission end time may be stored in a recording medium (not shown).

  (Step S304) The spectrum acquisition unit 23 sets the counter m to 1.

  (Step S305) The spectrum acquisition unit 23 determines whether or not the mth radio signal exists in the kth frequency band. If it exists, the process proceeds to step S306, and if not, the process proceeds to step S311. The radio signal is a signal from the transmission start time to the most recent transmission end time thereafter. As described above, when the period is smaller than a predetermined threshold, the spectrum acquisition unit 23 may determine that no radio signal exists during the period.

  (Step S306) The spectrum acquisition unit 23 acquires a frequency spectrum corresponding to the m-th radio signal. Details of this processing will be described later using the flowchart of FIG. 4C. The acquired frequency spectrum may be stored in a recording medium (not shown).

  (Step S307) The feature amount acquisition unit 24 acquires a feature amount from the frequency spectrum acquired by the spectrum acquisition unit 23. The acquired feature amount may be stored in a recording medium (not shown).

  (Step S308) The wireless communication method detection unit 26 determines whether or not range information indicating a range including the acquired feature amount is stored in the storage unit 25. If it is stored, the process proceeds to step S309; otherwise, the process proceeds to step S310. Details of this processing will be described later with reference to the flowchart of FIG. 4D.

  (Step S309) The wireless communication method detection unit 26 selects the wireless communication method corresponding to the range information determined to include the feature amount in step S308 as the wireless communication method of the mth wireless signal in the kth frequency band. To detect. Information for identifying the detected wireless communication method may be stored in a recording medium (not shown). In addition to the information, the frequency band and transmission period of the m-th radio signal are preferably stored in a recording medium (not shown).

  (Step S310) The spectrum acquisition unit 23 increments the counter m by 1. Then, the process returns to step S305.

  (Step S311) The time point detection unit 22 increments the counter k by 1.

  (Step S312) The time point detection unit 22 determines whether or not the kth frequency band exists. If the k-th frequency band exists, the process returns to step S302; otherwise, the process returns to the flowchart of FIG. 4A.

FIG. 4C is a flowchart showing details of the spectrum acquisition process (step S306) in the flowchart of FIG. 4B.
(Step S401) The spectrum acquisition unit 23 sets the frequency counter i to the lowest frequency i _min of the k-th frequency band in the flowchart of FIG. 4B.

(Step S402) The spectrum acquisition unit 23 sets the maximum value p _i ^max of the power of the frequency i to an initial value. The initial value is preferably set to a sufficiently small value, for example, a power value about the background noise or a smaller power value.

(Step S403) The spectrum acquisition unit 23 sets the time counter j to the time j _min at the start of transmission of the m-th radio signal in the k-th frequency band in the flowchart of FIG. 4B.

(Step S404) The spectrum acquisition unit 23 determines whether or not p _{i, j} in the spectrogram is greater than the maximum value p _i ^max . If p _{i, j} is larger than the maximum value p _i ^max , the process proceeds to step S405. Otherwise, the process proceeds to step S406.

(Step S405) The spectrum acquisition unit 23 updates the maximum value p _i ^max of the power of the frequency i to p _{i, j} .

  (Step S406) The spectrum acquisition unit 23 increments the time counter j by one.

(Step S407) The spectrum acquisition unit 23 determines whether or not the time counter j has exceeded the time j _max at the end of transmission of the m-th radio signal in the k-th frequency band in the flowchart of FIG. 4B. If the time counter j exceeds j _max , the process proceeds to step S408; otherwise, the process returns to step S404.

  (Step S408) The spectrum acquisition unit 23 increments the frequency counter i by one.

(Step S409) The spectrum acquisition unit 23 determines whether the frequency counter i exceeds the maximum frequency i _max of the k-th frequency band in the flowchart of FIG. 4B. When the frequency counter i exceeds the maximum frequency i _max , the process returns to the flowchart of FIG. 4B, and otherwise returns to step S402.

  FIG. 4D is a flowchart showing details of the process (step S308) for determining whether there is range information including the feature amount in the flowchart of FIG. 4B. In this flowchart, a case where the feature amount is a frequency variation will be described. In this flowchart, it is assumed that an upper limit threshold and a lower limit threshold are set for each frequency i. Also, this flowchart determines whether or not a feature amount is included in certain range information. Therefore, the wireless communication system detection unit 26 may perform the processing of this flowchart for each range information stored in the storage unit 25. Note that it is preferable that the wireless communication method detection unit 26 performs the processing of this flowchart only for range information corresponding to the wireless communication method of the kth frequency band in the flowchart of FIG. 4B. Since one or more range information usually corresponds to a certain frequency band, the wireless communication system detection unit 26 may perform the process of the flowchart of FIG. 4D for each of the one or more range information. Become. Note that the plurality of range information corresponding to the same frequency band may be, for example, a plurality of range information corresponding to a plurality of wireless communication schemes having the same frequency band but different protocols.

(Step S501) The wireless communication system detection unit 26 sets the frequency counter i to the lowest frequency i _min of the k-th frequency band in the flowchart of FIG. 4B.

(Step S502) radio communication scheme detecting unit 26 reads the upper threshold delta ^f p _i ^max and lower threshold delta ^f p _i ^min of the frequency i indicated by the range information stored in the storage unit 25, a frequency in the frequency variation i values delta ^f p _i is the whether included in the range between the upper and lower thresholds, i.e., whether it is determined whether the _{^{Δ f p i max <Δ f}} p i <Δ f p i min. If the value of the frequency i in the frequency variation is included in the range, the process proceeds to step S503, and if not, the process proceeds to step S506. In addition, at least one of the inequality signs may be an inequality sign (≦) with an equal sign.

  (Step S503) The wireless communication system detection unit 26 increments the frequency counter i by one.

(Step S504) The wireless communication system detection unit 26 determines whether the frequency counter i has exceeded the maximum frequency i _max of the k-th frequency band in the flowchart of FIG. 4B. If the frequency counter i exceeds the maximum frequency i _max , the process proceeds to step S505, and if not, the process returns to step S502.

  (Step S505) The wireless communication system detection unit 26 determines that the frequency variation that is the feature amount is included in the range indicated by the range information to be determined. Then, the process of determining whether or not the feature amount is included in the range information ends.

  (Step S506) The wireless communication system detection unit 26 determines that the frequency variation that is the feature amount is not included in the range indicated by the range information to be determined. Then, the process of determining whether or not the feature amount is included in the range information ends.

  In the flowchart of FIG. 4D, for all the frequencies i in the frequency band of interest, when the value of the frequency variation is included in the range indicated by the range information, it is determined that the feature amount is included in the range information. As described above, when the frequency variation value is included in the range indicated by the range information for the frequency i greater than the threshold, it may be determined that the feature amount is included in the range information.

FIG. 4E is a flowchart showing details of processing for changing the amount of used resources (step S103) in the flowchart of FIG.
(Step S601) The changing unit 13 sets the counter k to 1.

  (Step S602) The changing unit 13 determines whether or not the kth wireless communication method is to be changed. And when it is a change target, it progresses to step S603, and when that is not right, it progresses to step S605.

  (Step S603) The changing unit 13 determines whether the change content of the k-th wireless communication method is an increase or a decrease. If it is an increase, the process proceeds to step S604, and if it is a decrease, the process proceeds to step S607.

  (Step S604) The changing unit 13 increases the usage resource amount of the k-th wireless communication method. Specifically, the changing unit 13 changes the usage resource amount to 100%.

  (Step S605) The changing unit 13 increments the counter k by 1.

  (Step S606) The changing unit 13 determines whether or not the k-th wireless communication method exists. If it exists, the process returns to step S602; otherwise, the process returns to the flowchart of FIG.

  (Step S607) The changing unit 13 decreases the amount of resources used in the kth wireless communication method. Specifically, the changing unit 13 changes the usage resource amount to 0%. Then, the process proceeds to step S605.

Next, operation | movement of the utilization resource acquisition apparatus 1 by this Embodiment is demonstrated using a specific example. In this specific example, a case where the use resource acquisition device 1 is a wireless LAN access point will be described. It is assumed that the access point performs wireless communication with each station using a wireless LAN using CH13 as a use channel. In addition, the changing unit 13 changes the used resource amount of Bluetooth to 0% and changes the used resource amount of ZigBee (IEEE802.15.4) to 100%. In addition, the acquisition unit 12 acquires the use resource amount for each wireless communication method only for the channel used by the wireless communication unit 11.
In such a situation, it is assumed that the usage resource amount for each wireless communication method is acquired at a certain timing, and the acquisition result is as follows (steps S101 and S102).
Wireless LAN: R1%

In such a case, since there is no wireless communication system to be changed, the usage resource amount is not changed (steps S103, S601, S602, S606, and S104). Therefore, in the utilization resource acquisition apparatus 1, the channel is not changed (step S105), and the conventional accommodation possibility determination is performed (steps S107 to S109).
Thereafter, it is assumed that wireless communication between the ZigBee parent device and the child device is started in the frequency band of CH13. Then, it is assumed that the result of the usage resource amount for each wireless communication method acquired at a certain timing is as follows (steps S101 and S102).
Wireless LAN: R2%
ZigBee: R3%

  Then, the changing unit 13 changes the use resource amount of the ZigBee to 100% (steps S103, S601 to S606, S104). In that case, since the amount of ZigBee resource that is not the wireless communication system of the own cell is 100%, the control unit 16 determines that the channel to be used is changed (step S105), and performs spectrum sensing on the wireless communication unit 11. Suppose that a new use channel is determined to be 5CH using the result. And the control part 16 controls the radio | wireless communication part 11 to transmit the channel change instruction | indication containing the new use channel and the information which shows the timing of channel change to each station. Further, the control unit 16 controls the wireless communication unit 11 to change the use channel from CH13 to CH5 at the time indicated by the timing (step S106). In this way, a communication opportunity in ZigBee wireless communication can be secured.

Thereafter, it is assumed that the result of the usage resource amount for each wireless communication method acquired at a certain timing in the new usage channel is as follows (steps S101 and S102).
Wireless LAN: R4%
Bluetooth: R5%
Then, the changing unit 13 changes the use resource amount of the Bluetooth to 0% (steps S103, S601 to S603, S607, S605, S606, and S104). In this case, since there is substantially the same as the case where only wireless LAN communication exists, the use resource acquisition apparatus 1 does not change the channel (step S105) and determines whether or not accommodation is possible as usual. (Steps S107 to S109). In this way, even if Bluetooth and wireless LAN are mixed, the amount of resources used for wireless LAN is not reduced. In addition, as described above, the communication quality between the two is not greatly degraded even in such a case.

  As described above, according to the usage resource acquisition apparatus 1 according to the present embodiment, the usage resource amount of the wireless communication of each wireless communication method is acquired in consideration of the mutual influence of the wireless communication of each wireless communication method. be able to. As a result, for wireless communication systems that do not affect the quality of wireless communication even if they are mixed with wireless communication of a certain wireless communication system, use that satisfies QoE by reducing the amount of resources used for that wireless communication system It is possible to increase the amount of resources and to suppress deterioration in communication quality. In addition, when mixed with wireless communication of a certain wireless communication method, for wireless communication methods whose communication quality deteriorates, by increasing the amount of resources used for that wireless communication method, transmission of wireless communication of that wireless communication method is performed. Opportunities can be secured. Further, by changing the amount of used resources as described above, a conventional control method can be used as a control method in a control unit at the subsequent stage that performs control using the amount of used resources. That is, it is possible to perform radio resource allocation control in consideration of the characteristics of radio communication for each radio communication method, by simply changing the method for acquiring the amount of used resources to the method using the used resource acquisition apparatus 1 according to the present embodiment. It becomes like this. Further, by performing control by the control unit 16, for example, as in Document 2 above, the packet loss rate of wireless communication according to IEEE 802.15.4 is calculated, and an alarm is transmitted when it is higher than the target value Even without providing a sensor server, an IEEE 802.15.4 transmission opportunity can be secured, and the packet loss rate can be reduced.

  In the present embodiment, the case where the use resource acquisition device 1 includes the control unit 16 has been described, but this need not be the case. The used resource acquisition device 1 may not include the control unit 16. In that case, using the amount of wireless communication system resources output by the output unit 14, other devices perform control related to radio resource allocation such as, for example, determination of availability or change of a used channel. It may be broken.

Further, when the frequency resolution of each process performed in the use resource acquisition apparatus 1 is sufficiently small (for example, a fraction of a fraction) of the frequency bandwidth of the wireless communication method to be detected, each wireless communication method is It can be detected. Therefore, for example, a wireless communication system that performs frequency hopping, such as Bluetooth, can be detected by detecting a transmission start time, acquiring a frequency spectrum, and the like for a frequency band corresponding to each channel. On the other hand, when the frequency resolution of each process is not so high, for example, a wireless communication method with a wide frequency bandwidth is detected using the above-described method, and wireless communication with a narrow frequency bandwidth such as Bluetooth is performed. About a system, you may detect using the method of the following literature 3, for example. Further, as described in the document 3, for example, by using a remainder obtained by dividing a transmission start time (transmission start time) by a transmission interval, discrimination between Bluetooth and IEEE 802.15.4 can be realized with higher accuracy. can do. The transmission start time may be detected by the time detection unit 22. In addition, by using the time residue, even if the bandwidths of Bluetooth and IEEE 802.15.4 are the same, both can be identified. Specifically, the wireless communication system detection unit 26 calculates a remainder obtained by dividing the transmission start time by the Bluetooth transmission interval for the wireless signal whose transmission start time and transmission end time are detected by the time detection unit 22. The wireless signals having the same remainder may be determined to be Bluetooth wireless signals. Note that the same remainder may include that the remainder is the same in consideration of the error. As described above, when detecting the wireless communication of Bluetooth using the remainder of the transmission time, the wireless communication method detection unit 26 transmits, for example, a wireless signal having a bandwidth other than Bluetooth of 2 MHz to IEEE 802.15.4. It may be determined that the signal is a wireless signal. In addition, since a wireless signal of IEEE 802.15.4 usually has a constant center frequency, the wireless communication method detection unit 26 has a bandwidth other than Bluetooth, for example, 2 MHz, and a center frequency is constant. The signal may be determined to be an IEEE 802.15.4 radio signal. The bandwidth and center frequency may be acquired by the feature amount acquisition unit 24, for example.
Reference 3: Akihiro Miyasaka, Hitoshi Yano, Masayuki Ariyoshi, Kiyoshi Kobayashi, “System Identification by Nearest Neighbor Method from Broadband Spectrogram in Mixed ZigBee and Bluetooth”, 2014 IEICE General Conference, B-17-31, p. . 610, March 2014

  Further, in the present embodiment, the wireless communication system detection unit 26 detects the wireless communication system depending on whether or not the acquired frequency fluctuation is included in the upper threshold and lower threshold ranges for each frequency indicated by the range information. Although the case has been described, this need not be the case. For example, the wireless communication system detection unit 26 determines whether or not the acquired frequency fluctuation satisfies the condition for each wireless communication system, and the wireless communication system corresponding to the condition that the frequency fluctuation satisfies corresponds to the frequency fluctuation. You may detect as a wireless communication system. The condition may be, for example, a condition relating to a difference between the downward peak frequency and the upward peak frequency in the frequency variation, or may be other conditions.

  Even if the feature quantity acquisition unit 24 acquires feature quantities other than frequency fluctuations, the wireless communication scheme detection unit 26 determines whether the feature quantity is included in the range indicated by the range information. Alternatively, by determining whether or not the feature amount satisfies the condition, the wireless communication method corresponding to the feature amount may be detected. In the latter case, for example, the conditions for each wireless communication method may be stored in the storage unit 25.

  Further, the wireless communication method detection unit 26 may detect the wireless communication method corresponding to the frequency spectrum using the frequency spectrum itself acquired by the spectrum acquisition unit 23. Also in that case, for example, it may be determined whether or not the frequency spectrum satisfies a preset condition, and when the frequency spectrum satisfies a certain condition, a wireless communication method corresponding to the condition may be detected. The condition may be, for example, a condition related to the center frequency or a condition related to the frequency width from the rising edge to the falling edge of the frequency spectrum. Further, for example, conditions for each wireless communication method may be stored in the storage unit 25. Further, the wireless communication method detection unit 26 may detect a wireless communication method corresponding to the acquired frequency spectrum, for example, by pattern matching. Specifically, the wireless communication system detection unit 26 may identify a pattern that matches the acquired frequency spectrum and detect a wireless communication system corresponding to the identified pattern. In that case, for example, a pattern for each wireless communication method may be stored in the storage unit 25. In addition, in this way, when detecting a wireless communication method corresponding to a frequency spectrum without using a feature amount, the use resource acquisition device 1 may not include the feature amount acquisition unit 24.

  Further, in the present embodiment, the processing in the case where wireless signals by two or more wireless communication schemes do not overlap has been described, but each wireless communication scheme may be detected even when such overlap exists. Is possible. For example, when there is such an overlap, the frequency fluctuation, which is a feature amount acquired from the frequency spectrum, has a shape in which the frequency fluctuation of IEEE 802.15.4 and the frequency fluctuation of the wireless LAN overlap. Even in such a case, it is possible to detect IEEE 802.15.4 as usual. On the other hand, when detecting a wireless communication method according to the frequency band of the wireless LAN, a range in which the frequency variation is indicated by the range information in a frequency band other than the frequency band corresponding to IEEE 802.15.4 that has already been detected. If it is included, it may be detected that wireless communication corresponding to the wireless LAN is being performed. In addition, when performing the detection process according to such duplication of radio signals, it is preferable to perform the detection process in the order of narrow frequency bands. Then, when detecting the wireless communication method for a certain wireless signal, the wireless communication method detecting unit 26 has a feature amount in the frequency band excluding the frequency band corresponding to the wireless communication method already detected for the wireless signal. It may be determined whether or not it is included in the range information.

  Moreover, although this Embodiment demonstrated the case where each process was performed for every frequency band corresponding to a radio | wireless communication system, it may not be so. For example, when the wireless communication unit 11 of the utilization resource acquisition device 1 performs wireless communication using a wireless LAN, in the frequency band in which the wireless communication unit 11 performs wireless communication or a frequency band including the frequency band, You may perform the process which acquires the utilization resource amount for every radio | wireless communication system.

  In the present embodiment, the case where the spectrogram is a frequency power spectrogram has been mainly described. However, as described above, another spectrogram may be used. When the spectrogram is not a frequency power spectrogram, the power value of the spectrogram in the above description may be considered to be a characteristic value other than the power of the spectrogram.

  In the above embodiment, each process or each function may be realized by centralized processing by a single device or a single system, or may be distributedly processed by a plurality of devices or a plurality of systems. It may be realized by doing.

  In the above embodiment, the information exchange between the components is performed by one component when, for example, the two components that exchange the information are physically different from each other. It may be performed by outputting information and receiving information by the other component, or when two components that exchange information are physically the same, one component May be performed by moving from the phase of the process corresponding to to the phase of the process corresponding to the other component.

  In the above embodiment, information related to processing executed by each component, for example, information received, acquired, selected, generated, transmitted, or received by each component In addition, information such as threshold values, mathematical formulas, addresses, and the like used by each constituent element in processing may be temporarily or for a long time held in a recording medium (not shown), even if not specified in the above description. Further, the storage of information on the recording medium (not shown) may be performed by each component or a storage unit (not shown). Further, reading of information from the recording medium (not shown) may be performed by each component or a reading unit (not shown).

  In the above embodiment, when information used by each component, for example, information such as a threshold value, an address, and various setting values used by each component may be changed by the user, Even if it is not specified in the description, the user may be able to change the information as appropriate, or may not be so. If the information can be changed by the user, the change is realized by, for example, a not-shown receiving unit that receives a change instruction from the user and a changing unit (not shown) that changes the information in accordance with the change instruction. May be. The change instruction received by the receiving unit (not shown) may be received from an input device, information received via a communication line, or information read from a predetermined recording medium, for example. .

  Further, in the above embodiment, when two or more components included in the use resource acquisition apparatus 1 have communication devices, input devices, etc., the two or more components have a physically single device. Or may have separate devices.

  In the above-described embodiment, each component may be configured by dedicated hardware, or a component that can be realized by software may be realized by executing a program. For example, each component can be realized by a program execution unit such as a CPU reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. At the time of execution, the program execution unit may execute the program while accessing the storage unit or the recording medium. In addition, the software which implement | achieves the utilization resource acquisition apparatus 1 in the said embodiment is the following programs. In other words, this program uses a received signal received by a wireless communication unit that performs wireless communication to acquire a use resource amount, which is a wireless resource amount used for wireless communication, for each wireless communication method. Of the amount of resource used for each wireless communication method acquired by the acquisition unit, the change unit that increases or decreases the amount of resource used for the wireless communication method to be changed, and the wireless communication method to be changed are changed by the changing unit. For a wireless communication method that outputs a changed usage resource amount and is not a change target, the program is a program for causing the output unit to function as an output unit that outputs the usage resource amount acquired by the acquisition unit.

  In the program, the functions realized by the program do not include functions that can be realized only by hardware. For example, functions that can be realized only by hardware such as a modem or an interface card in an acquisition unit that acquires information, an output unit that outputs information, and the like are not included in at least the functions realized by the program.

  Further, this program may be executed by being downloaded from a server or the like, and a program recorded on a predetermined recording medium (for example, an optical disk such as a CD-ROM, a magnetic disk, a semiconductor memory, or the like) is read out. May be executed by Further, this program may be used as a program constituting a program product.

  Further, the computer that executes this program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

  FIG. 7 is a schematic diagram illustrating an example of an external appearance of a computer that executes the program and realizes the use resource acquisition apparatus 1 according to the embodiment. The above-described embodiment can be realized by computer hardware and a computer program executed on the computer hardware.

  7, the computer system 900 includes a computer 901 including a CD-ROM drive 905, a keyboard 902, a mouse 903, and a monitor 904.

  FIG. 8 is a diagram showing an internal configuration of the computer system 900. In FIG. 8, in addition to the CD-ROM drive 905, a computer 901 is connected to an MPU (Micro Processing Unit) 911, a ROM 912 for storing a program such as a bootup program, and the MPU 911, and receives instructions of an application program. A RAM 913 that temporarily stores and provides a temporary storage space, a hard disk 914 that stores application programs, system programs, and data, and a bus 915 that interconnects the MPU 911, the ROM 912, and the like are provided. The computer 901 may include a network card (not shown) that provides connection to a LAN, WAN, or the like.

  A program that causes the computer system 900 to execute the function of the utilization resource acquisition apparatus 1 according to the above-described embodiment may be stored in the CD-ROM 921, inserted into the CD-ROM drive 905, and transferred to the hard disk 914. Instead, the program may be transmitted to the computer 901 via a network (not shown) and stored in the hard disk 914. The program is loaded into the RAM 913 when executed. The program may be loaded directly from the CD-ROM 921 or the network. Further, the program may be read into the computer system 900 via another recording medium (for example, a DVD) instead of the CD-ROM 921.

  The program does not necessarily include an operating system (OS), a third party program, or the like that causes the computer 901 to execute the function of the utilization resource acquisition apparatus 1 according to the above-described embodiment. The program may include only a part of an instruction that calls an appropriate function or module in a controlled manner and obtains a desired result. How the computer system 900 operates is well known and will not be described in detail.

  Further, the present invention is not limited to the above-described embodiment, and various modifications are possible, and it goes without saying that these are also included in the scope of the present invention.

  As described above, according to the use resource acquisition device and the like according to the present invention, it is possible to obtain the effect that the use status of the radio communication for each radio communication method can be acquired in consideration of the characteristics of each radio communication method. It is useful as a device for acquiring the amount of resources used for each wireless communication system for allocation control.

DESCRIPTION OF SYMBOLS 1 Use resource acquisition apparatus 11 Wireless communication part 12 Acquisition part 13 Change part 14 Output part 15, 25 Storage part 16 Control part 21 Spectrogram acquisition part 22 Time point detection part 23 Spectrum acquisition part 24 Feature-value acquisition part 26 Wireless communication system detection part 27 Resource acquisition unit

Claims (6)

A wireless communication unit for performing wireless communication;
Using the received signal received by the wireless communication unit, an acquisition unit that acquires a usage resource amount, which is an amount of a wireless resource used for wireless communication, for each wireless communication method;
Of the usage resource amount for each wireless communication scheme acquired by the acquisition unit, a changing unit that increases or decreases the usage resource amount of the wireless communication scheme to be changed,
For the wireless communication scheme to be changed, the usage resource amount changed by the changing portion is output, and for the wireless communication scheme not being changed, an output portion that outputs the usage resource amount acquired by the acquisition portion, and Use resource acquisition device provided. The changing unit is
For wireless communication methods that do not affect the quality of mutual wireless communication even when mixed with a predetermined wireless communication method, reduce the amount of resources used for the wireless communication method,
The used resource acquisition apparatus according to claim 1, wherein for a wireless communication method in which the quality of wireless communication decreases when mixed with the predetermined wireless communication method, the amount of used resources of the wireless communication method is increased. The reduction in the amount of used resources is to minimize the amount of used resources.
The use resource acquisition apparatus according to claim 2, wherein the increase in the use resource amount is to maximize the use resource amount. The utilization resource acquisition apparatus of Claim 1 further provided with the control part which performs control regarding radio | wireless resource allocation using the utilization resource amount output by the said output part. A reception step of receiving a reception signal by wireless communication;
Using the received signal received in the reception step, an acquisition step of acquiring a usage resource amount, which is an amount of radio resources used for radio communication, for each radio communication method;
Of the used resource amount for each wireless communication method acquired in the acquiring step, a changing step for increasing or decreasing the used resource amount of the wireless communication method to be changed;
For the wireless communication method to be changed, output the used resource amount changed in the changing step, and for the wireless communication method not changed, output the used resource amount acquired in the acquiring step; and Use resource acquisition method provided. Computer
An acquisition unit that acquires a use resource amount, which is an amount of a radio resource used for radio communication, for each radio communication method, using a reception signal received by a radio communication unit that performs radio communication,
A change unit that increases or decreases the use resource amount of the wireless communication method to be changed among the use resource amounts for each wireless communication method acquired by the acquisition unit,
For the wireless communication method to be changed, the usage resource amount changed by the changing unit is output, and for the wireless communication method that is not the changing target, the output unit outputs a usage resource amount acquired by the acquisition unit. Program for.

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