JP2009296146A - Radio communication device and processing method thereof - Google Patents

Radio communication device and processing method thereof Download PDF

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JP2009296146A
JP2009296146A JP2008145855A JP2008145855A JP2009296146A JP 2009296146 A JP2009296146 A JP 2009296146A JP 2008145855 A JP2008145855 A JP 2008145855A JP 2008145855 A JP2008145855 A JP 2008145855A JP 2009296146 A JP2009296146 A JP 2009296146A
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wireless communication
priority
communication device
wireless
radio
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JP5063488B2 (en
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Hironori Shiba
宏礼 芝
Munehiro Matsui
宗大 松井
Kazunori Akaha
和徳 赤羽
Kazuhiro Uehara
一浩 上原
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Nippon Telegraph and Telephone Corp
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<P>PROBLEM TO BE SOLVED: To provide a radio communication device belonging to a non-priority radio system capable of reducing erroneous detection of the presence or absence of transmission of a radio signal from a radio communication device belonging to a prior radio system: and to provide a processing method thereof. <P>SOLUTION: The radio communication device belonging to the non-priority radio communication system receives natural environment information as well as information as to whether or not the radio communication device belonging to the prior radio communication system transmits a radio signal. When the radio communication device transmits the radio signal and the natural environment information does not exceed a reference value, the radio communication device determines that the radio communication device belonging to the prior radio system starts communication processing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、優先的に特定の周波数を用いて無線通信を行なう優先無線システムに属する無線通信装置が無線通信を行なっていない場合に、その周波数を用いて無線通信を行なう無線通信装置およびその処理方法に関する。   The present invention relates to a wireless communication apparatus that performs wireless communication using a frequency when the wireless communication apparatus that belongs to a priority wireless system that performs wireless communication using a specific frequency preferentially does not perform the wireless communication, and processing thereof Regarding the method.

近年、周波数の有効利用を図る手段として、cognitive（以下、コグニティブと記す）無線技術が注目されている。コグニティブ無線技術とは、無線通信装置が周囲の電波環境を認識し、適切な周波数帯域等を選択して無線通信を行なうことにより、空いている周波数帯域を有効に活用する技術である。コグニティブ無線により、従来注目されていなかった周波数や時間を有効に活用することができるため、単位面積当たりの利用周波数帯域を大幅に向上させることができる。   In recent years, cognitive (hereinafter referred to as cognitive) radio technology has attracted attention as a means for effectively using frequencies. The cognitive radio technology is a technology in which a radio communication device recognizes a surrounding radio wave environment, selects an appropriate frequency band, etc., and performs radio communication, thereby effectively utilizing an available frequency band. The cognitive radio can effectively use frequencies and time that have not been attracting attention in the past, so that the frequency band used per unit area can be greatly improved.

ここで、コグニティブ無線技術では、通常、複数の無線システムが同一周波数を共用することが想定されており、また、優先無線システムと非優先無線システムを規定し、非優先無線システムは優先無線システムが通信に利用していない周波数、時間を利用して、優先無線システムに属する通信装置に干渉を与えないように通信を行なう。優先無線システムに属する通信装置と、非優先無線システムに属する通信装置が同一周波数を共用する場合、非優先無線システムに属する通信装置は、優先無線システムに属する通信装置の周波数の利用状況を把握する必要がある。そして、優先無線システムに属する通信装置の周波数利用を検出する方法として、共用する周波数の無線信号の受信強度を検出することにより優先無線システムの周波数の利用状況を検出するEnergy Detectionや、無線信号の周期定常性の特徴を利用したCyclostationary Detectionなどの検出方法が存在する。そして、Energy Detectionに関する技術が非特許文献１に開示されている。   Here, in the cognitive radio technology, it is usually assumed that a plurality of radio systems share the same frequency, and a priority radio system and a non-priority radio system are defined. Communication is performed using a frequency and time not used for communication so as not to interfere with communication devices belonging to the priority wireless system. When a communication device belonging to the priority wireless system and a communication device belonging to the non-priority wireless system share the same frequency, the communication device belonging to the non-priority wireless system grasps the usage status of the frequency of the communication device belonging to the priority wireless system. There is a need. And, as a method of detecting the frequency usage of the communication device belonging to the priority wireless system, Energy Detection for detecting the usage status of the frequency of the priority wireless system by detecting the reception intensity of the wireless signal of the shared frequency, There are detection methods such as cyclostationary detection using the characteristics of periodic stationarity. A technique related to Energy Detection is disclosed in Non-Patent Document 1.

図４は従来の非優先無線システムにおける無線通信装置の機能ブロック図である。
図４において、非優先無線システムにおける無線通信装置の無線通信部４１は他の無線通信装置と無線通信を行なう処理部である。また周波数情報取得部４２は、無線通信部４１で受信した受信信号から、受信電力や当該受信信号の特徴などを抽出する。また無線システム検出部４３は、周波数情報取得部４２から受信電力などの情報を受け、当該受信電力などの情報と、予めメモリ等に記録されている優先無線システムを検出するための閾値とを比較し、優先無線システムの検出を行なう。優先無線システムを検出した場合、無線通信装置の無線システム検出部４３は、無線通信部４１に、通信処理の停止、あるいはチャネルの変更といった指示を行う。また無線通信システム検出部４３は、周波数情報取得部４２に情報取得要求を行う場合もある。 FIG. 4 is a functional block diagram of a wireless communication apparatus in a conventional non-priority wireless system.
In FIG. 4, a wireless communication unit 41 of a wireless communication device in a non-priority wireless system is a processing unit that performs wireless communication with other wireless communication devices. Further, the frequency information acquisition unit 42 extracts received power, characteristics of the received signal, and the like from the received signal received by the wireless communication unit 41. The wireless system detection unit 43 receives information such as reception power from the frequency information acquisition unit 42 and compares the information such as reception power with a threshold value for detecting a priority wireless system recorded in advance in a memory or the like. The priority wireless system is detected. When the priority wireless system is detected, the wireless system detection unit 43 of the wireless communication apparatus instructs the wireless communication unit 41 to stop communication processing or change the channel. Further, the radio communication system detection unit 43 may make an information acquisition request to the frequency information acquisition unit 42.

図５は従来の非優先無線システムにおける無線通信装置の処理フローを示す図である。
非優先無線システムにおける無線通信装置は、自装置の周辺環境の周波数データを取得し（ステップＳ５１）、優先無線システムによる通信の有無を検出する（ステップＳ５２）。そして、非優先無線システムにおける無線通信装置は、その判定結果（ステップＳ５３）に基づいて、優先無線システムによる周波数の利用が無い場合には、非優先無線システムにおける無線通信の開始、或いは無線通信の継続を行なう（ステップＳ５４）。また上記判定結果において、優先無線システムによる周波数の利用がある場合には、非優先無線システムにおける無線通信の停止を行なう（ステップＳ５５）。以上により、非優先無線システムに属する無線通信装置は、優先無線システムと周波数の共用を行なう。
Qingchun Ren, Qilian Liang,“Performance Analysis of Energy Detection for Cognitive Radio Wireless Network”WASA 2007, IEEE, pp.139-146,Aug.2007 FIG. 5 is a diagram showing a processing flow of the wireless communication apparatus in the conventional non-priority wireless system.
The wireless communication device in the non-priority wireless system acquires the frequency data of the surrounding environment of the own device (step S51), and detects the presence / absence of communication by the priority wireless system (step S52). Then, based on the determination result (step S53), the wireless communication device in the non-priority wireless system starts the wireless communication in the non-priority wireless system or performs wireless communication when the frequency is not used by the priority wireless system. Continue (step S54). If the frequency is used by the priority wireless system in the determination result, the wireless communication in the non-priority wireless system is stopped (step S55). As described above, the wireless communication devices belonging to the non-priority wireless system share the frequency with the priority wireless system.
Qingchun Ren, Qilian Liang, “Performance Analysis of Energy Detection for Cognitive Radio Wireless Network” WASA 2007, IEEE, pp.139-146, Aug.2007

ここで、上述した従来のコグニティブ無線技術においては、優先無線システムに属する無線通信装置と非優先無線システムに属する無線通信装置が周波数の共用を行なう場合、非優先無線システムに属する無線通信装置は、優先無線システムに属する無線通信装置が発する無線信号の周波数をセンシングし、優先無線システムに属する無線通信装置からの無線信号の発信有無を検出している。しかしながら、当該優先無線システムに属する無線通信装置の発する無線信号の周波数は、フェージングやジャドウイングなどの周波数変動が発生することがあり、非優先無線システムに属する無線通信装置は、優先無線システムに属する無線通信装置が無線信号を発信していないにもかかわらず、当該無線通信装置が無線信号を発信していると誤検出してしまうという問題や、優先無線システムに属する無線通信装置が無線信号を発信しているにもかかわらず、当該無線通信装置が無線信号を発信していない誤検出してしまうという問題が発生する。   Here, in the conventional cognitive radio technology described above, when the radio communication device belonging to the priority radio system and the radio communication device belonging to the non-priority radio system share the frequency, the radio communication device belonging to the non-priority radio system is: The frequency of a radio signal emitted from a radio communication device belonging to the priority radio system is sensed to detect the presence / absence of a radio signal from the radio communication device belonging to the priority radio system. However, the frequency of the radio signal emitted by the radio communication device belonging to the priority radio system may vary in frequency such as fading and judwing, and the radio communication device belonging to the non-priority radio system belongs to the priority radio system. Although the wireless communication device does not transmit a wireless signal, the wireless communication device erroneously detects that the wireless signal is transmitting, or the wireless communication device belonging to the priority wireless system transmits a wireless signal. In spite of the transmission, there is a problem that the wireless communication apparatus erroneously detects that the wireless signal is not transmitted.

そこでこの発明は、優先無線システムに属する無線通信装置からの無線信号の発信の有無の誤検出を軽減することのできる、非優先無線システムに属する無線通信装置とその処理方法を提供することを目的としている。   Accordingly, an object of the present invention is to provide a wireless communication apparatus belonging to a non-priority wireless system and a processing method thereof, which can reduce erroneous detection of the presence / absence of transmission of a wireless signal from the wireless communication apparatus belonging to the priority wireless system. It is said.

上記目的を達成するために、本発明は、優先的に特定の周波数を用いて無線通信を行なう優先無線システムに属する無線通信装置と、前記優先無線システムに属する無線通信装置が前記周波数を用いて無線通信を行なっていない時に、前記周波数を利用して無線通信を行なう非優先無線システムに属する無線通信装置と、を有する無線通信システムにおける、前記非優先無線システムに属する無線通信装置であって、前記非優先無線システムに属する無線通信装置が、前記周波数による無線通信処理と、他装置からの無線信号の受信処理とを行なう無線通信手段と、前記受信処理によって取得した無線信号から周波数情報を取得する周波数情報取得手段と、前記取得した周波数情報に基づいて、前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無を判定する優先無線システム検出手段と、自然環境情報を取得する自然環境情報取得手段と、前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無と、前記取得した自然環境情報とに基づいて、自装置の無線通信の停止、電波の輻射の停止、前記周波数の利用、自装置の無線通信の開始、自装置の無線通信の継続のいずれかを決定する処理決定手段と、を備えることを特徴とする無線通信装置である。   To achieve the above object, the present invention provides a wireless communication device belonging to a priority wireless system that preferentially performs wireless communication using a specific frequency, and a wireless communication device belonging to the priority wireless system uses the frequency. A wireless communication apparatus belonging to the non-priority wireless system in a wireless communication system having a wireless communication apparatus belonging to a non-priority wireless system that performs wireless communication using the frequency when not performing wireless communication, A wireless communication device belonging to the non-priority wireless system obtains frequency information from a wireless communication means for performing wireless communication processing by the frequency and reception processing of a wireless signal from another device, and a wireless signal acquired by the reception processing Frequency information acquisition means for performing wireless communication devices belonging to the priority wireless system based on the acquired frequency information Priority wireless system detection means for determining presence / absence of wireless communication at the frequency, natural environment information acquisition means for acquiring natural environment information, presence / absence of wireless communication at the frequency by a wireless communication device belonging to the priority wireless system, Based on the acquired natural environment information, it is determined whether to stop the wireless communication of the own device, stop the radio wave radiation, use the frequency, start the wireless communication of the own device, or continue the wireless communication of the own device. A wireless communication apparatus, comprising:

また本発明は、前記非優先無線システムに属する無線通信装置の自然環境情報取得手段は、通信ネットワークを介して他装置から前記自然環境情報を取得することを特徴とする。   Further, the present invention is characterized in that the natural environment information acquisition means of the wireless communication device belonging to the non-priority wireless system acquires the natural environment information from another device via a communication network.

また本発明は、前記自然環境情報は、地震発生時に計測できる地震波のうちのＰ波、空気中の気圧、風速、雨量、津波発生時に計測できる潮位、波の振動周期、空気中の放射線量の何れか１つまたは複数であることを特徴とする。   According to the present invention, the natural environment information includes P wave of seismic waves that can be measured at the time of earthquake occurrence, atmospheric pressure, wind speed, rainfall, tide level that can be measured at the time of tsunami occurrence, wave vibration period, radiation dose in the air. It is any one or a plurality.

また本発明は、優先的に特定の周波数を用いて無線通信を行なう優先無線システムに属する無線通信装置と、前記優先無線システムに属する無線通信装置が前記周波数を用いて無線通信を行なっていない時に、前記周波数を利用して無線通信を行なう非優先無線システムに属する無線通信装置と、を有する無線通信システムにおける、前記非優先無線システムに属する無線通信装置の処理方法であって、前記非優先無線システムに属する無線通信装置の無線通信手段が、前記周波数による無線通信処理と、他装置からの無線信号の受信処理とを行ない、前記非優先無線システムに属する無線通信装置の周波数情報取得手段が、前記受信処理によって取得した無線信号から周波数情報を取得し、前記非優先無線システムに属する無線通信装置の優先無線システム検出手段が、前記取得した周波数情報に基づいて、前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無を判定し、前記非優先無線システムに属する無線通信装置の自然環境情報取得手段が、自然環境情報を取得し、前記非優先無線システムに属する無線通信装置の処理決定手段が、前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無と、前記取得した自然環境情報とに基づいて、自装置の無線通信の停止、電波の輻射の停止、前記周波数の利用、自装置の無線通信の開始、自装置の無線通信の継続のいずれかを決定することを特徴とする処理方法である。   The present invention also provides a wireless communication device belonging to a priority wireless system that preferentially performs wireless communication using a specific frequency, and a wireless communication device belonging to the priority wireless system is not performing wireless communication using the frequency. A wireless communication apparatus belonging to a non-priority wireless system that performs wireless communication using the frequency, and a processing method for the wireless communication apparatus belonging to the non-priority wireless system, Radio communication means of a radio communication device belonging to the system performs radio communication processing by the frequency and reception processing of radio signals from other devices, and frequency information acquisition means of the radio communication device belonging to the non-priority radio system includes: The frequency information is acquired from the radio signal acquired by the reception process, and the radio communication device belonging to the non-priority radio system Based on the acquired frequency information, the destination wireless system detection means determines whether or not wireless communication of the frequency is performed by the wireless communication device belonging to the priority wireless system, and the natural environment of the wireless communication device belonging to the non-priority wireless system The information acquisition unit acquires natural environment information, and the processing determination unit of the wireless communication device belonging to the non-priority wireless system includes the presence / absence of the wireless communication of the frequency by the wireless communication device belonging to the priority wireless system and the acquired Based on the natural environment information, determining whether to stop the wireless communication of the own device, stop the radio wave radiation, use the frequency, start the wireless communication of the own device, or continue the wireless communication of the own device. This is a characteristic processing method.

また本発明は、上述の処理方法において、前記非優先無線システムに属する無線通信装置の自然環境情報取得手段は、通信ネットワークを介して他装置から前記自然環境情報を取得することを特徴とする。   According to the present invention, in the processing method described above, the natural environment information acquisition unit of the wireless communication device belonging to the non-priority wireless system acquires the natural environment information from another device via a communication network.

また本発明は、上述の処理方法において、前記自然環境情報は、地震発生時に計測できる地震波のうちのＰ波、空気中の気圧、風速、雨量、津波発生時に計測できる潮位、波の振動周期、空気中の放射線量の何れか１つまたは複数であることを特徴とする。   Further, the present invention is the processing method described above, wherein the natural environment information includes P waves of seismic waves that can be measured when an earthquake occurs, atmospheric pressure, wind speed, rainfall, tide level that can be measured when a tsunami occurs, wave vibration period, It is any one or a plurality of radiation doses in the air.

本発明によれば、非優先無線システムに属する無線通信装置は、優先無線システムに属する無線通信装置が無線信号を発信しているかの情報だけでなく、自然環境情報をさらに受信して、当該優先無線システムに属する無線通信装置が無線信号を発信していないにもかかわらず、自然環境情報が基準値を超えた場合には、優先無線システムに属する無線通信装置が通信処理を開始すると判定している。従って、優先無線システムに属する無線通信装置が無線信号を発信していない時でも、その後、発信する可能性がある場合にはそれを検出して自装置の通信を停止するため、優先無線システムに属する無線通信装置の通信処理の開始を検出する精度が上がり、誤検出による優先無線システムへの与干渉の軽減を行うことができる。   According to the present invention, the wireless communication device belonging to the non-priority wireless system further receives not only information on whether the wireless communication device belonging to the priority wireless system is transmitting a wireless signal, but also the natural environment information, If the natural environment information exceeds the reference value even though the wireless communication device belonging to the wireless system does not transmit a wireless signal, it is determined that the wireless communication device belonging to the priority wireless system starts communication processing. Yes. Therefore, even when a wireless communication device belonging to the priority wireless system does not transmit a wireless signal, if there is a possibility of transmitting the signal thereafter, it is detected and the communication of the own device is stopped. The accuracy of detecting the start of communication processing of the wireless communication device to which the wireless communication apparatus belongs is increased, and interference with the priority wireless system due to erroneous detection can be reduced.

以下、本発明の一実施形態による無線通信システムを図面を参照して説明する。
図１は同実施形態による無線通信システムの構成を示すブロック図である。
この図において、符号１は優先無線システムに属する無線通信装置である。また２は非優先無線システムに属する無線通信装置である。この図に示す優先無線システムに属する無線通信装置１は、周波数ｆａの無線信号を利用する。そして、非優先無線システムに属する無線通信装置２は、優先無線システムに属する無線通信装置１が周波数ｆａの無線信号の送信を停止したことを検出した場合、当該周波数ｆａの無線信号を用いて、非優先無線システム内の他の無線通信装置と無線信号による通信を行なう。ここで、優先無線システムは、例えば、周波数ｆａの無線信号の使用がライセンスされた無線システムであり、非優先無線システムはライセンスされていない無線システムである。またライセンスされている、いないに関わらず、優先無線システムは、非優先無線システムに対して優先的に周波数ｆａを利用できる無線システムであるとする。 Hereinafter, a wireless communication system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a wireless communication system according to the embodiment.
In this figure, reference numeral 1 denotes a wireless communication apparatus belonging to the priority wireless system. Reference numeral 2 denotes a wireless communication apparatus belonging to a non-priority wireless system. The wireless communication device 1 belonging to the priority wireless system shown in this figure uses a radio signal having a frequency fa. When the wireless communication device 2 belonging to the non-priority wireless system detects that the wireless communication device 1 belonging to the priority wireless system has stopped transmitting the wireless signal having the frequency fa, the wireless communication device 2 uses the wireless signal having the frequency fa, Communication with other wireless communication devices in the non-priority wireless system is performed using wireless signals. Here, the priority wireless system is, for example, a wireless system licensed to use a radio signal having the frequency fa, and the non-priority wireless system is an unlicensed wireless system. It is assumed that the priority radio system is a radio system that can use the frequency fa preferentially with respect to the non-priority radio system regardless of whether it is licensed or not.

図２は非優先無線システムにおける無線通信装置の機能ブロック図である。
この図が示すように、非優先無線システムにおける無線通信装置２は、無線通信部１１、周波数情報取得部１２、無線システム検出部１３、自然環境情報取得部１４の各機能部を備えている。そして、非優先無線システムの無線通信装置２において、無線通信部１１は周波数ｆａを用いて、非優先無線システム内の他の無線通信装置と無線信号により通信を行い、周波数情報取得部１２は、無線通信部１１の受信した無線信号から周波数情報を取得する。そして、無線システム検出部１３は、優先無線システムに属する無線通信装置１からの周波数ｆａの無線信号の発信の有無を判定するために、周波数情報取得部１２と、自然環境情報取得部１４から、周波数情報と自然環境情報の転送を要求する。なお、周波数情報取得部１２と、自然環境情報取得部１４が、周期的に、各取得した情報を無線システム検出部１３に転送するようにしてもよい。そして、無線システム検出部１３は、優先無線システムに属する無線通信装置１からの周波数ｆａの無線信号を検出した場合、または自然環境情報が閾値を超えた場合には、無線通信部１１へ、無線通信の停止、或いは電波の輻射の停止、或いは優先無線システムが利用する周波数の利用停止、を指示する。一方、無線システム検出部１３は、優先無線システムに属する無線通信装置１からの周波数ｆａの無線信号を検出していない場合や、自然環境情報が閾値を超えていない場合には、無線通信部１１へ、周波数ｆａの利用が可能であることを通知する。 FIG. 2 is a functional block diagram of the wireless communication device in the non-priority wireless system.
As shown in this figure, the wireless communication device 2 in the non-priority wireless system includes functional units of a wireless communication unit 11, a frequency information acquisition unit 12, a wireless system detection unit 13, and a natural environment information acquisition unit 14. In the wireless communication device 2 of the non-priority wireless system, the wireless communication unit 11 communicates with other wireless communication devices in the non-priority wireless system using the frequency fa, and the frequency information acquisition unit 12 Frequency information is acquired from the radio signal received by the radio communication unit 11. Then, the radio system detection unit 13 determines whether or not the radio signal having the frequency fa from the radio communication device 1 belonging to the priority radio system is transmitted from the frequency information acquisition unit 12 and the natural environment information acquisition unit 14. Request transfer of frequency information and natural environment information. Note that the frequency information acquisition unit 12 and the natural environment information acquisition unit 14 may periodically transfer each acquired information to the wireless system detection unit 13. When the wireless system detection unit 13 detects a wireless signal with the frequency fa from the wireless communication device 1 belonging to the priority wireless system, or when the natural environment information exceeds the threshold value, the wireless system detection unit 13 An instruction is given to stop communication, stop radio wave radiation, or stop using the frequency used by the priority wireless system. On the other hand, if the wireless system detection unit 13 has not detected a wireless signal having the frequency fa from the wireless communication device 1 belonging to the priority wireless system, or if the natural environment information does not exceed the threshold value, the wireless communication unit 11 To notify that the frequency fa can be used.

図３は非優先無線システムの無線通信装置の処理フローを示す図である。
次に、非優先無線システムの無線通信装置の処理フローについて説明する。
まず無線通信装置２の自然環境情報取得部１４が、自然環境情報を取得する（ステップＳ１１）。そして、自然環境情報取得部１４は、自装置のメモリ等に記録されている自然環境情報の基準値と、取得した自然環境情報とを比較して、基準値で示される自然環境情報の値を超えているかどうかを判定し自然環境の変化を検出する（ステップＳ１２）。また、無線通信装置２の周波数情報取得部１２が、無線通信部１１の受信した無線信号から、周辺環境における無線信号の周波数情報を取得する（ステップＳ１３）。これにより、取得した周波数に、自装置の利用する周波数ｆａが存在するかどうかを検出し、優先無線システムの検出を行なう（ステップＳ１４）。そして、これにより、優先無線システムに属する無線通信装置１から周波数ｆａの無線信号が発信されているかを判定する。そして、取得した自然環境情報と、検出した周波数に基づいて、周波数ｆａの利用による自装置の無線信号の発信が可能かを判定する（ステップＳ１５）。そして、自然環境情報が基準値を以下で、無線通信装置１から周波数ｆａの無線信号が発信されていない場合、つまり自装置による周波数ｆａの無線信号の送信が可能な場合には、周波数ｆａの無線信号による通信処理の開始、または周波数ｆａの無線信号による通信処理の継続を行なう（ステップＳ１６）。また、自然環境情報が基準値以上（無線通信装置１によって無線通信が開始さる可能性がある）、または無線通信装置１から周波数ｆａの無線信号が発信されている場合、つまり自装置による周波数ｆａの無線信号の送信が不可能な場合には、周波数ｆａの無線信号による通信処理の停止、または電波の輻射の停止、或いは優先無線システムが利用する周波数の利用停止を行なう（ステップＳ１７）。 FIG. 3 is a diagram illustrating a processing flow of the wireless communication device of the non-priority wireless system.
Next, a processing flow of the wireless communication device of the non-priority wireless system will be described.
First, the natural environment information acquisition unit 14 of the wireless communication device 2 acquires natural environment information (step S11). Then, the natural environment information acquisition unit 14 compares the reference value of the natural environment information recorded in the memory or the like of the own device with the acquired natural environment information, and determines the value of the natural environment information indicated by the reference value. It is determined whether or not it exceeds, and a change in the natural environment is detected (step S12). Further, the frequency information acquisition unit 12 of the wireless communication device 2 acquires the frequency information of the wireless signal in the surrounding environment from the wireless signal received by the wireless communication unit 11 (step S13). Thereby, it is detected whether or not the frequency fa used by the own apparatus exists in the acquired frequency, and the priority wireless system is detected (step S14). Thus, it is determined whether or not a radio signal having the frequency fa is transmitted from the radio communication device 1 belonging to the priority radio system. Then, based on the acquired natural environment information and the detected frequency, it is determined whether or not the wireless signal of the own device can be transmitted by using the frequency fa (step S15). When the natural environment information is below the reference value and no radio signal having the frequency fa is transmitted from the radio communication apparatus 1, that is, when the radio signal having the frequency fa can be transmitted by the own apparatus, the frequency fa The communication process using the radio signal is started or the communication process using the radio signal having the frequency fa is continued (step S16). Further, when the natural environment information is equal to or higher than a reference value (the wireless communication device 1 may start wireless communication), or a wireless signal having the frequency fa is transmitted from the wireless communication device 1, that is, the frequency fa by the own device. If the wireless signal cannot be transmitted, the communication process using the radio signal having the frequency fa is stopped, the radio wave is stopped, or the frequency used by the priority wireless system is stopped (step S17).

なお、自然環境情報取得部１４は、取得する自然環境情報を、有線ネットワークまたは無線ネットワークを介して、自然環境情報の観測装置や提供装置から受信するようにしてもよい。自然環境情報の観測装置や提供装置は、例えば、自然環境を測定する測定会社や測定機関が有するものである。ここで、無線通信装置２の位置情報や自然環境情報の取得時刻が明確な場合には、無線通信装置２の周辺の最新の情報だけを選択して収集することも可能となる。位置情報については、ＧＰＳ機能を無線通信装置２が備えることでＧＳＰ衛星から位置情報を取得することができる。また時刻情報は電波時計を備えていれば、その電波時計から時刻を取得することができる。   The natural environment information acquisition unit 14 may receive the acquired natural environment information from a natural environment information observation device or a provision device via a wired network or a wireless network. The natural environment information observing device and the providing device are, for example, possessed by a measurement company or a measurement organization that measures the natural environment. Here, when the position information of the wireless communication device 2 and the acquisition time of the natural environment information are clear, it is possible to select and collect only the latest information around the wireless communication device 2. As for the location information, the location information can be acquired from the GSP satellite by providing the wireless communication device 2 with the GPS function. If the time information includes a radio clock, the time can be acquired from the radio clock.

次に、自然環境情報について説明する。
自然環境情報は、例えば地震発生時に計測できる地震波のうちのＰ波、或いは台風発生時における気圧、風速、雨量、或いは津波発生時に計測できる潮位や波の振動周期などである。また空気中の放射線量であってもよい。そして、それらの自然環境情報の２つ以上の情報を観測して、それら複数の自然環境情報を無線通信装置２で用いるようにしても良い。そして、例えば、優先無線システムが防災警報を通知する無線システムであるような場合、非優先無線システムに属する無線通信装置２の自然環境情報取得部１４は、自然環境情報として、地震波のＰ波や空気中のガンマ線の情報を他の装置から受信する。そして、その自然環境情報となる地震波のＰ波の強度や、空気中のガンマ線の量と、予めメモリで記憶するそれぞれの基準値とを比較して、取得した自然環境情報が基準値を上回る場合には、防災警報を通知する優先無線システムが動作すると判定する。そして、この判定結果に基づいて、防災警報を通知する優先無線システムの通信を優先させるために、自装置による通信を停止する。 Next, natural environment information will be described.
The natural environment information is, for example, a P wave among seismic waves that can be measured when an earthquake occurs, or atmospheric pressure, wind speed, rainfall, or a tidal level that can be measured when a tsunami occurs, or a wave vibration period. Moreover, the radiation dose in the air may be sufficient. Then, two or more pieces of information on the natural environment information may be observed, and the plurality of natural environment information may be used in the wireless communication device 2. For example, when the priority wireless system is a wireless system that notifies a disaster prevention alarm, the natural environment information acquisition unit 14 of the wireless communication device 2 that belongs to the non-priority wireless system uses the P wave of the seismic wave as the natural environment information. Information on gamma rays in the air is received from other devices. When the acquired natural environment information exceeds the reference value by comparing the intensity of the P wave of the seismic wave as the natural environment information and the amount of gamma rays in the air with each reference value stored in advance in the memory It is determined that the priority wireless system that notifies the disaster prevention alarm operates. And based on this determination result, in order to give priority to communication of the priority wireless system which notifies a disaster prevention alarm, the communication by the own apparatus is stopped.

以上、本発明の実施形態について説明したが、上述の処理によれば、非優先無線システムに属する無線通信装置は、優先無線システムに属する無線通信装置が無線信号を発信しているかの情報だけでなく、自然環境情報をさらに受信して、当該優先無線システムに属する無線通信装置が無線信号を発信していないにもかかわらず、自然環境情報が基準値を超えた場合には、優先無線システムに属する無線通信装置が通信処理を開始すると判定している。従って、優先無線システムに属する無線通信装置が無線信号を発信していない時でも、その後、発信する可能性がある場合にはそれを検出して自装置の通信を停止するため、優先無線システムに属する無線通信装置の通信処理の開始を検出する精度が上がり、誤検出による優先無線システムへの与干渉の軽減を行うことができる。   As described above, the embodiment of the present invention has been described. According to the above-described processing, the wireless communication device belonging to the non-priority wireless system is only information on whether the wireless communication device belonging to the priority wireless system is transmitting a wireless signal. If the natural environment information exceeds the reference value even though the natural environment information is further received and the wireless communication device belonging to the priority wireless system does not transmit a wireless signal, the priority wireless system It is determined that the wireless communication device to which it belongs starts communication processing. Therefore, even when a wireless communication device belonging to the priority wireless system does not transmit a wireless signal, if there is a possibility of transmitting the signal thereafter, it is detected and the communication of the own device is stopped. The accuracy of detecting the start of communication processing of the wireless communication device to which the wireless communication apparatus belongs is increased, and interference with the priority wireless system due to erroneous detection can be reduced.

なお、上述の各装置は内部に、コンピュータシステムを有している。そして、上述した各処理の過程は、プログラムの形式でコンピュータ読み取り可能な記録媒体に記憶されており、このプログラムをコンピュータが読み出して実行することによって、上記処理が行われる。ここでコンピュータ読み取り可能な記録媒体とは、磁気ディスク、光磁気ディスク、ＣＤ−ＲＯＭ、ＤＶＤ−ＲＯＭ、半導体メモリ等をいう。また、このコンピュータプログラムを通信回線によってコンピュータに配信し、この配信を受けたコンピュータが当該プログラムを実行するようにしても良い。   Each of the above devices has a computer system inside. Each process described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

また、上記プログラムは、前述した機能の一部を実現するためのものであっても良い。さらに、前述した機能をコンピュータシステムにすでに記録されているプログラムとの組み合わせで実現できるもの、いわゆる差分ファイル（差分プログラム）であっても良い。   The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

無線通信システムの構成を示すブロック図である。It is a block diagram which shows the structure of a radio | wireless communications system. 非優先無線システムにおける無線通信装置の機能ブロック図である。It is a functional block diagram of the radio | wireless communication apparatus in a non-priority radio system. 非優先無線システムの無線通信装置の処理フローを示す図である。It is a figure which shows the processing flow of the radio | wireless communication apparatus of a non-priority radio system. 従来の非優先無線システムにおける無線通信装置の機能ブロック図である。It is a functional block diagram of the radio | wireless communication apparatus in the conventional non-priority radio | wireless system. 従来の非優先無線システムにおける無線通信装置の処理フローを示す図である。It is a figure which shows the processing flow of the radio | wireless communication apparatus in the conventional non-priority radio system.

符号の説明Explanation of symbols

１・・・優先無線システムに属する無線通信装置である。
２・・・非優先無線システムに属する無線通信装置である。
１１・・・無線通信部（無線通信手段）
１２・・・周波数情報取得部（周波数情報取得手段）
１３・・・無線システム検出部（優先無線システム検出手段、処理決定手段）
１４・・・自然環境情報取得部（自然環境情報取得手段） 1 is a wireless communication device belonging to a priority wireless system.
2 is a wireless communication device belonging to a non-priority wireless system.
11: Wireless communication unit (wireless communication means)
12: Frequency information acquisition unit (frequency information acquisition means)
13: Wireless system detection unit (priority wireless system detection means, processing determination means)
14 ... Natural environment information acquisition unit (natural environment information acquisition means)

Claims (6)

優先的に特定の周波数を用いて無線通信を行なう優先無線システムに属する無線通信装置と、前記優先無線システムに属する無線通信装置が前記周波数を用いて無線通信を行なっていない時に、前記周波数を利用して無線通信を行なう非優先無線システムに属する無線通信装置と、を有する無線通信システムにおける、前記非優先無線システムに属する無線通信装置であって、
前記非優先無線システムに属する無線通信装置が、
前記周波数による無線通信処理と、他装置からの無線信号の受信処理とを行なう無線通信手段と、
前記受信処理によって取得した無線信号から周波数情報を取得する周波数情報取得手段と、
前記取得した周波数情報に基づいて、前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無を判定する優先無線システム検出手段と、
自然環境情報を取得する自然環境情報取得手段と、
前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無と、前記取得した自然環境情報とに基づいて、自装置の無線通信の停止、電波の輻射の停止、前記周波数の利用、自装置の無線通信の開始、自装置の無線通信の継続のいずれかを決定する処理決定手段と、
を備えることを特徴とする無線通信装置。 A radio communication device belonging to a priority radio system that preferentially performs radio communication using a specific frequency, and a radio communication device belonging to the priority radio system uses the frequency when the radio communication device does not perform radio communication using the frequency. A wireless communication device belonging to the non-priority wireless system, and a wireless communication device belonging to the non-priority wireless system,
A wireless communication device belonging to the non-priority wireless system is
Wireless communication means for performing wireless communication processing by the frequency and reception processing of a wireless signal from another device;
Frequency information acquisition means for acquiring frequency information from the radio signal acquired by the reception process;
Based on the acquired frequency information, priority wireless system detection means for determining presence / absence of wireless communication of the frequency by a wireless communication device belonging to the priority wireless system;
Natural environment information acquisition means for acquiring natural environment information;
Based on the presence / absence of wireless communication at the frequency by the wireless communication device belonging to the priority wireless system and the acquired natural environment information, the wireless communication of the device is stopped, the radio wave is stopped, the use of the frequency, Processing determining means for determining either start of wireless communication of the device or continuation of wireless communication of the own device;
A wireless communication apparatus comprising: 前記非優先無線システムに属する無線通信装置の自然環境情報取得手段は、通信ネットワークを介して他装置から前記自然環境情報を取得する
ことを特徴とする請求項１に記載の無線通信装置。 The wireless communication device according to claim 1, wherein the natural environment information acquisition unit of the wireless communication device belonging to the non-priority wireless system acquires the natural environment information from another device via a communication network. 前記自然環境情報は、地震発生時に計測できる地震波のうちのＰ波、空気中の気圧、風速、雨量、津波発生時に計測できる潮位、波の振動周期、空気中の放射線量の何れか１つまたは複数であることを特徴とする請求項１または請求項２に記載の無線通信装置。   The natural environment information is any one of a P wave among seismic waves that can be measured when an earthquake occurs, atmospheric pressure, wind speed, rainfall, tide level that can be measured when a tsunami occurs, wave vibration period, and radiation dose in the air, or The wireless communication device according to claim 1, wherein there are a plurality of wireless communication devices. 優先的に特定の周波数を用いて無線通信を行なう優先無線システムに属する無線通信装置と、前記優先無線システムに属する無線通信装置が前記周波数を用いて無線通信を行なっていない時に、前記周波数を利用して無線通信を行なう非優先無線システムに属する無線通信装置と、を有する無線通信システムにおける、前記非優先無線システムに属する無線通信装置の処理方法であって、
前記非優先無線システムに属する無線通信装置の無線通信手段が、前記周波数による無線通信処理と、他装置からの無線信号の受信処理とを行ない、
前記非優先無線システムに属する無線通信装置の周波数情報取得手段が、前記受信処理によって取得した無線信号から周波数情報を取得し、
前記非優先無線システムに属する無線通信装置の優先無線システム検出手段が、前記取得した周波数情報に基づいて、前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無を判定し、
前記非優先無線システムに属する無線通信装置の自然環境情報取得手段が、自然環境情報を取得し、
前記非優先無線システムに属する無線通信装置の処理決定手段が、前記優先無線システムに属する無線通信装置による前記周波数の無線通信の有無と、前記取得した自然環境情報とに基づいて、自装置の無線通信の停止、電波の輻射の停止、前記周波数の利用、自装置の無線通信の開始、自装置の無線通信の継続のいずれかを決定する
ことを特徴とする処理方法。 A radio communication device belonging to a priority radio system that preferentially performs radio communication using a specific frequency, and a radio communication device belonging to the priority radio system uses the frequency when the radio communication device does not perform radio communication using the frequency. A wireless communication device belonging to a non-priority wireless system that performs wireless communication, and a processing method for the wireless communication device belonging to the non-priority wireless system,
Radio communication means of a radio communication device belonging to the non-priority radio system performs radio communication processing by the frequency and reception processing of a radio signal from another device,
The frequency information acquisition means of the wireless communication device belonging to the non-priority wireless system acquires frequency information from the wireless signal acquired by the reception process,
The priority wireless system detection means of the wireless communication device belonging to the non-priority wireless system determines the presence or absence of wireless communication of the frequency by the wireless communication device belonging to the priority wireless system based on the acquired frequency information,
The natural environment information acquisition means of the wireless communication device belonging to the non-priority wireless system acquires natural environment information,
Based on the presence / absence of wireless communication of the frequency by the wireless communication device belonging to the priority wireless system and the acquired natural environment information, the processing determining means of the wireless communication device belonging to the non-priority wireless system A processing method characterized by determining one of stop of communication, stop of radio wave radiation, use of the frequency, start of wireless communication of the own device, and continuation of wireless communication of the own device. 前記非優先無線システムに属する無線通信装置の自然環境情報取得手段は、通信ネットワークを介して他装置から前記自然環境情報を取得することを特徴とする請求項４に記載の処理方法。   The processing method according to claim 4, wherein the natural environment information acquisition unit of the wireless communication device belonging to the non-priority wireless system acquires the natural environment information from another device via a communication network. 前記自然環境情報は、地震発生時に計測できる地震波のうちのＰ波、空気中の気圧、風速、雨量、津波発生時に計測できる潮位、波の振動周期、空気中の放射線量の何れか１つまたは複数であることを特徴とする請求項４または請求項５に記載の処理方法。   The natural environment information is any one of a P wave among seismic waves that can be measured when an earthquake occurs, atmospheric pressure, wind speed, rainfall, tide level that can be measured when a tsunami occurs, wave vibration period, and radiation dose in the air, or 6. The processing method according to claim 4 or 5, wherein there are a plurality of processing methods.
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