JP2008085849A - Wireless terminal device - Google Patents
Wireless terminal device Download PDFInfo
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- JP2008085849A JP2008085849A JP2006265365A JP2006265365A JP2008085849A JP 2008085849 A JP2008085849 A JP 2008085849A JP 2006265365 A JP2006265365 A JP 2006265365A JP 2006265365 A JP2006265365 A JP 2006265365A JP 2008085849 A JP2008085849 A JP 2008085849A
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Abstract
Description
本発明は、無線端末装置に関するものであり、特に無線端末装置に不具合が生じ通信不可能になった場合に上位装置へ通知を行う無線端末装置に関するものである。 The present invention relates to a wireless terminal device, and more particularly to a wireless terminal device that notifies a host device when a failure occurs in a wireless terminal device and communication becomes impossible.
従来の無線通信システムについて図３を用いて説明する。
図３において、３０１は統制局（制御局とも呼ばれる。）であり、３０２は基地局、３０３−１、３０３−２、３０３−３・・・３０３−Nは移動局である。また、移動局を総称する場合には移動局３０３と記載する。さらに、統制局３０１と基地局３０２間は、有線またはマイクロ回線等の伝送路３０４にて接続されているのが一般的である。基地局３０２の通信エリア３０５（または、通信ゾーンとも呼ぶ。）内に移動局３０３が存在することによって、基地局３０２を経由した移動局間通信や統制局３０１と移動局３０３の通信を行うことが可能になる。また、移動局３０３は基地局を介さずに移動局同士で通信を行う移動局間直接通信を行うことが可能である。
A conventional wireless communication system will be described with reference to FIG.
3, 301 is a control station (also referred to as a control station), 302 is a base station, 303-1, 303-2, 303-3... 303-N are mobile stations. In addition, the mobile station is collectively referred to as a mobile station 303. Further, the control station 301 and the base station 302 are generally connected by a transmission line 304 such as a wired or micro line. When the mobile station 303 exists in the communication area 305 (or communication zone) of the base station 302, communication between the mobile stations via the base station 302 and communication between the control station 301 and the mobile station 303 are performed. Is possible. In addition, the mobile station 303 can perform direct communication between mobile stations in which communication is performed between mobile stations without using a base station.
統制局３０１は、デジタル無線通信システムにおける基地局３０２および複数の移動局３０３間の通信接続およびサービスエリアの維持、管理を行う。この統制局３０１には、回線制御装置が設置され、移動局からの発呼(call)制御あるいは通信ルートの設定を行う制御等を行う。 The control station 301 maintains and manages a communication connection and a service area between the base station 302 and the plurality of mobile stations 303 in the digital wireless communication system. The control station 301 is provided with a line control device, and performs control such as call control from a mobile station or setting of a communication route.
次に上述したデジタル無線通信システムにおける無線端末装置について図４を用いて説明する。図４において、４０１は無線端末装置に設けられた電力増幅部であり、電力増幅部４０１内には、電力の方向性を決定するサーキュレータ４０２と、電力増幅のためのアンプ４０３と、サーキュレータ４０２に接続され、送信波の反射等が生じた場合の高周波電力を終端させ、回路や機器の破損を防ぐための終端抵抗４０５が設けられており、電力増幅部４０１には送受信を行うアンテナ４０６と無線伝送を行うための無線部４０４が接続されている。
このように構成することによって、例えば電力増幅部４０１とアンテナ４０６間で断線が生じ、無線部からの送信出力信号が断線部分にて反射した場合、サーキュレータ４０２の方向性によって反射波は全て終端抵抗４０５に終端され、アンプ４０３や無線部４０４の破損を防ぐことが可能となる。
Next, a wireless terminal device in the digital wireless communication system described above will be described with reference to FIG. In FIG. 4, reference numeral 401 denotes a power amplifying unit provided in the wireless terminal device. The power amplifying unit 401 includes a circulator 402 that determines the direction of power, an amplifier 403 for power amplification, and a circulator 402. A termination resistor 405 is provided to terminate the high frequency power when the transmission wave is reflected and the like, and to prevent damage to circuits and equipment. The power amplifier 401 and the antenna 406 for transmitting and receiving are wirelessly connected. A wireless unit 404 for performing transmission is connected.
With this configuration, for example, when a disconnection occurs between the power amplification unit 401 and the antenna 406 and the transmission output signal from the radio unit is reflected at the disconnection part, all reflected waves are terminated by the directionality of the circulator 402. Terminating at 405 makes it possible to prevent the amplifier 403 and the radio unit 404 from being damaged.
しかし、上記のような従来技術の場合、電力増幅部４０１からアンテナ４０６にいたる経路で断線等の不具合が発生すると、アラーム等の通知がされなかったため、無線部４０４では送信を実施している状態となっていても実際には送信がなされていないという問題が生じていた。 However, in the case of the conventional technology as described above, when a failure such as a disconnection occurs in the path from the power amplification unit 401 to the antenna 406, an alarm or the like is not notified, and thus the wireless unit 404 is performing transmission. However, there was a problem that no transmission was actually made.
本発明では、上述したような従来の課題を解決するために為されたもので、無線端末装置内において断線等の障害発生時に、送信出力信号を停止させ上位装置に通知する無線端末装置を提供することを目的とする。 The present invention has been made to solve the above-described conventional problems, and provides a wireless terminal device that stops a transmission output signal and notifies a higher-level device when a failure such as a disconnection occurs in the wireless terminal device. The purpose is to do.
上記目的を達成するため、請求項１に記載の発明は、無線通信を行う無線端末装置において、該無線端末装置は少なくとも無線部と、アンテナ部と、電力増幅部とを有しており、
前記電力増幅部は、反射波検出用回路を具備し、所定の電力を検出すると前記無線部からの送信出力信号を停止する、ことを特徴とする。
In order to achieve the above object, according to the first aspect of the present invention, in the wireless terminal device that performs wireless communication, the wireless terminal device includes at least a wireless unit, an antenna unit, and a power amplifying unit.
The power amplifying unit includes a reflected wave detection circuit, and stops transmission output signals from the radio unit when a predetermined power is detected.
以上のように本発明によると、無線端末装置内において断線等の障害発生時に、送信出力信号を停止させ上位装置に通知する無線端末装置を提供することができる。 As described above, according to the present invention, it is possible to provide a wireless terminal device that stops a transmission output signal and notifies a higher-level device when a failure such as disconnection occurs in the wireless terminal device.
本発明における実施例について図面を参照して説明する。
図１は本発明における無線端末装置のブロック構成図である。
図１において、１０１は電力増幅部、１０２はサーキュレータ、１０３はアンプ、１０４は反射波検出回路、１０５は無線部、１０６は電力増幅部１０１と接続されているアンテナである。
通常、無線端末装置では無線部１０５により高周波の送信信号を生成し、生成された送信信号は電力増幅部１０１内のアンプ１０３へと伝送され、出力が増幅される。増幅された送信信号はアンテナ１０６を介して送信出力される。ここで、サーキュレータ１０２では、アンテナ１０６にて受信した反射波や不要波等を受けると、反射波検出回路１０４へと整流する。反射波検出回路１０４では、反射波が検出されると、アラーム信号を無線部１０５へと出力し、無線部１０５にて送信を停止させる。
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram of a wireless terminal device according to the present invention.
In FIG. 1, 101 is a power amplifying unit, 102 is a circulator, 103 is an amplifier, 104 is a reflected wave detection circuit, 105 is a radio unit, and 106 is an antenna connected to the power amplifying unit 101.
Normally, in the wireless terminal device, a high-frequency transmission signal is generated by the wireless unit 105, and the generated transmission signal is transmitted to the amplifier 103 in the power amplification unit 101, and the output is amplified. The amplified transmission signal is transmitted and output via the antenna 106. Here, when the circulator 102 receives a reflected wave or an unnecessary wave received by the antenna 106, the circulator 102 rectifies the reflected wave to the reflected wave detection circuit 104. When the reflected wave is detected, the reflected wave detection circuit 104 outputs an alarm signal to the radio unit 105 and the radio unit 105 stops transmission.
無線部１０５にて送信を停止した後、無線部１０５で送信信号を停止すると同時に上位装置である例えば統制局３０１に送信停止の通知を実施する。このとき基地局と統制局は例えば有線等の伝送路３０４で接続されているため、送信停止の通知は伝送路３０４で行う事が可能となる。
また、本実施例では反射波を受けた時の電流を整流するためサーキュレータを用いて説明したが、サーキュレータに限らず、例えばアイソレータでも良いことは言うまでも無い。
After the transmission is stopped by the wireless unit 105, the transmission signal is stopped by the wireless unit 105, and at the same time, for example, the control station 301 that is a higher-level device is notified of the transmission stop. At this time, since the base station and the control station are connected via a transmission line 304 such as a wired line, the transmission stop notification can be made via the transmission line 304.
In the present embodiment, the circulator is used to rectify the current when the reflected wave is received. However, it is needless to say that the circulator is not limited to the circulator.
図２は本発明の動作について記載したフローチャートを示した図である。
図２において、無線端末装置は通信を行うため送信を開始し（Ｓ２０１）、反射波検出回路１０４にてサーキュレータ１０２を介して反射波または不要波を検出しているかどうかを見ている（Ｓ２０２）。このとき反射波検出回路が反射波を検出しなかった場合にはそのまま送信を継続し、通信を行う（Ｓ２０４）が、反射波または不要波等を検出すると、無線部１０５にアラーム信号を出力し送信を停止する（Ｓ２０３）。
FIG. 2 is a flowchart showing the operation of the present invention.
In FIG. 2, the wireless terminal device starts transmission for communication (S201), and checks whether the reflected wave detection circuit 104 detects a reflected wave or an unnecessary wave via the circulator 102 (S202). . At this time, if the reflected wave detection circuit does not detect the reflected wave, the transmission is continued and communication is performed (S204). When the reflected wave or unnecessary wave is detected, an alarm signal is output to the wireless unit 105. Transmission is stopped (S203).
以上のことから本発明の実施の形態によると、電力増幅部からアンテナまでの空中線系での断線等を監視し、送信を止めるためのアラームを出力することで送信波がアンテナから出力されておらず、通話が行えないという状態を防ぐ事が可能となる。 From the above, according to the embodiment of the present invention, a disconnection wave or the like in the antenna system from the power amplification unit to the antenna is monitored, and an alarm for stopping transmission is output, so that a transmission wave is not output from the antenna. Therefore, it is possible to prevent a situation in which a call cannot be made.
さらに本発明の実施の形態によると、送信波が断線等の不具合により反射してきた場合に電力増幅部及び無線部が破損することを防ぐ事が可能となる。 Furthermore, according to the embodiment of the present invention, it is possible to prevent the power amplification unit and the radio unit from being damaged when the transmission wave is reflected due to a failure such as disconnection.
１０１・・・電力増幅部、
１０２・・・サーキュレータ、
１０３・・・アンプ、
１０４・・・反射波検出回路、
１０５・・・無線部、
１０６・・・アンテナ、
３０１・・・統制局、
３０２・・・基地局、
３０３・・・移動局、
３０４・・・伝送路、
３０５・・・通信エリア、
４０１・・・電力増幅部、
４０２・・・サーキュレータ、
４０３・・・アンプ、
４０４・・・無線部、
４０５・・・終端抵抗、
４０６・・・アンテナ。
101... Power amplifying unit,
102. Circulator,
103 ... Amplifier,
104: Reflected wave detection circuit,
105 ... wireless part,
106 ... Antenna,
301 ... Control station,
302 ... base station,
303 ... Mobile station,
304 ... transmission path,
305: Communication area,
401... Power amplifier,
402. Circulator,
403 ... amplifier,
404 ... wireless unit,
405: Termination resistance,
406: Antenna.
Claims (1)
前記電力増幅部は、反射波検出用回路を具備し、所定の電力を検出すると前記無線部からの送信出力信号を停止する、ことを特徴とした無線端末装置。 In a wireless terminal device that performs wireless communication, the wireless terminal device has at least a wireless unit, an antenna unit, and a power amplification unit,
The wireless terminal device, wherein the power amplification unit includes a reflected wave detection circuit and stops a transmission output signal from the wireless unit when a predetermined power is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006265365A JP2008085849A (en) | 2006-09-28 | 2006-09-28 | Wireless terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006265365A JP2008085849A (en) | 2006-09-28 | 2006-09-28 | Wireless terminal device |
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| Publication Number | Publication Date |
|---|---|
| JP2008085849A true JP2008085849A (en) | 2008-04-10 |
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| JP2006265365A Pending JP2008085849A (en) | 2006-09-28 | 2006-09-28 | Wireless terminal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010070985A1 (en) * | 2008-12-15 | 2010-06-24 | 日本電気株式会社 | Power detection circuit, transmitter, and power detection method |
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2006
- 2006-09-28 JP JP2006265365A patent/JP2008085849A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010070985A1 (en) * | 2008-12-15 | 2010-06-24 | 日本電気株式会社 | Power detection circuit, transmitter, and power detection method |
| JP5003824B2 (en) * | 2008-12-15 | 2012-08-15 | 日本電気株式会社 | Power detection circuit, transmission device, and power detection method |
| US8620225B2 (en) | 2008-12-15 | 2013-12-31 | Nec Corporation | Power detection circuit, transmitter, and power detection method |
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