JPH0730483A - Radio telephone equipment - Google Patents
Radio telephone equipmentInfo
- Publication number
- JPH0730483A JPH0730483A JP5195232A JP19523293A JPH0730483A JP H0730483 A JPH0730483 A JP H0730483A JP 5195232 A JP5195232 A JP 5195232A JP 19523293 A JP19523293 A JP 19523293A JP H0730483 A JPH0730483 A JP H0730483A
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- transmission
- power level
- partner station
- radio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車電話や携帯電話
等の無線電話装置に関し、特に、送信電力の強度を適切
な値に制御できるように構成したものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiotelephone device such as a car phone and a mobile phone, and more particularly, to a device for controlling the intensity of transmission power to an appropriate value.
【０００２】[0002]
【従来の技術】近年、無線電話装置は、その利便性や経
済性の向上に伴って、利用が急速に広がっており、中で
も自動車電話、携帯電話あるいは構内電話として、セル
ラー電話機およびコードレス電話機が著しく普及してい
る。2. Description of the Related Art In recent years, the use of wireless telephone devices has been rapidly expanding with the improvement of convenience and economy, and in particular, cellular telephones and cordless telephones are remarkably used as car telephones, mobile telephones or private telephones. It is popular.
【０００３】従来の無線電話装置は、図２に示すよう
に、音声信号および電話制御信号を入出力すると共に、
発呼・着呼等の電話機能処理を行なう電話部１と、電話
部１から出力される音声および制御信号を無線周波数に
変調する変調部２と、送信電力の制御を行なう送信電力
制御部３と、送信信号の電力増幅を行ないアンテナから
送出する送信信号電力増幅部４と、アンテナから受信さ
れた受信信号を増幅する受信信号増幅部５と、受信信号
を復調し電話部１に入力する復調部６と、受信信号増幅
部５の出力から受信信号の強度を測定する受信信号強度
評価部７と、無線電話装置の総括制御を行なう制御部８
とを備えている。As shown in FIG. 2, a conventional radiotelephone device inputs and outputs a voice signal and a telephone control signal, and
A telephone unit 1 that performs telephone function processing such as making and receiving calls, a modulator 2 that modulates voice and control signals output from the telephone unit 1 to a radio frequency, and a transmission power control unit 3 that controls transmission power. A transmission signal power amplification section 4 for amplifying the transmission signal power and transmitting it from the antenna; a reception signal amplification section 5 for amplifying the reception signal received from the antenna; and a demodulation for demodulating the reception signal and inputting it to the telephone section 1. Unit 6, a received signal strength evaluation unit 7 that measures the strength of the received signal from the output of the received signal amplification unit 5, and a control unit 8 that performs overall control of the wireless telephone device.
It has and.
【０００４】この無線電話装置では、発呼を行なう場合
に、相手局と確実に接続できるように、制御部８は、送
信電力制御部３に対して最大出力で送信するように指示
しながら、電話部１に発呼処理を行なわせる。In this radiotelephone device, the control unit 8 instructs the transmission power control unit 3 to transmit at the maximum output so that the other station can be surely connected when making a call. Causes the telephone unit 1 to perform call processing.
【０００５】発呼信号は、変調部２で変調され、送信電
力制御部３を介して送信信号電力増幅部４へ入力され、
アンテナより相手局へ送出される。相手局は、この発呼
信号を受信すると応答信号を送出し、応答信号は、受信
信号増幅部５で増幅され、受信信号評価部７へ入力され
る。受信信号評価部７は、相手局の受信信号強度を測定
し、制御部８へ測定結果を出力する。The calling signal is modulated by the modulator 2 and input to the transmission signal power amplifier 4 via the transmission power controller 3.
It is sent from the antenna to the partner station. Upon receiving this calling signal, the partner station sends a response signal, and the response signal is amplified by the received signal amplifier 5 and input to the received signal evaluator 7. The reception signal evaluation unit 7 measures the reception signal strength of the partner station and outputs the measurement result to the control unit 8.
【０００６】これを受けた制御部８は、受信信号強度か
ら自局の最適送信電力を求め、その電力値を送信電力制
御部３に設定し、アンテナから出力される送信電力を制
御する。つまり、受信信号強度が大きいときは、相手局
との距離が近いと判断し、送信電力を小さくし、逆に、
受信信号強度が小さいときは、相手局との距離が遠いと
判断し、送信電力を大きくする。Receiving this, the control unit 8 obtains the optimum transmission power of its own station from the received signal strength, sets the power value in the transmission power control unit 3, and controls the transmission power output from the antenna. That is, when the received signal strength is large, it is determined that the distance to the partner station is short, the transmission power is reduced, and
When the received signal strength is low, it is determined that the distance to the partner station is far, and the transmission power is increased.
【０００７】制御部８は、通話中も、相手局との距離の
変化等に基づく受信信号強度の変動に対応するため、こ
の送信電力の制御を継続し、送信電力を常に最適な状態
に維持する。The control unit 8 continues the control of the transmission power and maintains the transmission power in the optimum state at all times in order to cope with the fluctuation of the received signal strength due to the change of the distance with the partner station even during the call. To do.
【０００８】[0008]
【発明が解決しようとする課題】しかし、従来の無線電
話装置では、相手局と接続する際（接続処理）の最初の
時点で、送信電力を最大に設定して通信を開始するた
め、必要以上に電力を消費し、また、近隣の他無線シス
テムへの妨害を引き起こすという問題点を有していた。However, in the conventional radiotelephone device, since the transmission power is set to the maximum and communication is started at the first point of time when connecting with the partner station (connection process), it is more than necessary. However, it has a problem in that it consumes power and causes interference with other wireless systems in the vicinity.
【０００９】本発明は、こうした従来の問題点を解決す
るものであり、無線接続処理の際に送信電力が不必要に
大きくなることを防ぎ、それにより消費電力を減らし、
他無線システムへの妨害を最小限に抑えることができる
無線電話装置を提供することを目的としている。The present invention solves these conventional problems and prevents the transmission power from becoming unnecessarily high during the wireless connection process, thereby reducing the power consumption,
It is an object of the present invention to provide a wireless telephone device that can minimize interference with other wireless systems.
【００１０】[0010]
【課題を解決するための手段】そこで、本発明では、相
手局との通信状態に応じて送信電力レベルを制御する制
御手段を備えた無線電話装置において、前回の通信の送
信電力レベルを記憶する記憶手段を設け、制御手段に、
この記憶手段に記憶された送信電力レベルを次回の無線
接続時の初期送信電力レベルとして設定させている。Therefore, according to the present invention, the transmission power level of the previous communication is stored in the wireless telephone device having the control means for controlling the transmission power level according to the communication state with the partner station. A storage means is provided, and the control means is
The transmission power level stored in this storage means is set as the initial transmission power level for the next wireless connection.
【００１１】[0011]
【作用】そのため、相手局と無線通信を行なったときの
最適送信電力値が記憶手段に記憶され、次回に無線接続
を行なうときは、送信電力がこの最適値に設定されて送
信が開始される。従って、送信開始時の送信電力が不必
要に大きい値を取る事態が回避できる。Therefore, the optimum transmission power value at the time of wireless communication with the partner station is stored in the storage means, and when the wireless connection is made next time, the transmission power is set to this optimum value and the transmission is started. . Therefore, it is possible to avoid a situation where the transmission power at the start of transmission takes an unnecessarily large value.
【００１２】[0012]
【実施例】本発明の実施例における無線電話装置は、図
１に示すように、送信電力値を記憶する送信電力値記憶
部９を備えている。その他の構成は従来の装置（図２）
と変わりが無い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a wireless telephone device according to an embodiment of the present invention includes a transmission power value storage unit 9 for storing a transmission power value. Other configurations are conventional devices (Fig. 2)
There is no change.
【００１３】この無線電話装置は、まず初期状態におい
て無線電話装置から発呼を行なう場合には、従来の装置
と同様に相手局との接続を確実にするために、制御部８
が送信電力制御部３に対して最大出力で送信するように
指示し、電話部１において発呼処理を開始する。In the case where a call is made from the radiotelephone device in the initial state, the radiotelephone device controls the control unit 8 in order to ensure the connection with the partner station as in the conventional device.
Instructs the transmission power control unit 3 to transmit at the maximum output, and the telephone unit 1 starts the calling process.
【００１４】発呼信号は、変調部２で変調され、送信電
力制御部３を介して送信信号電力増幅部４へ入力され、
アンテナより相手局へ送出される。相手局がこの発呼信
号を受信すると、応答信号を送出し、この応答信号は、
受信信号増幅部５で増幅され、受信信号評価部７へ入力
される。The calling signal is modulated by the modulator 2 and input to the transmission signal power amplifier 4 via the transmission power controller 3.
It is sent from the antenna to the partner station. When the partner station receives this calling signal, it sends a response signal, and this response signal
The signal is amplified by the received signal amplifier 5 and input to the received signal evaluator 7.
【００１５】受信信号評価部７は、相手局の受信信号強
度を測定し、制御部８へ測定結果を出力する。制御部８
は、受信信号強度から自局の最適送信電力を求め、その
電力値を送信電力制御部３に設定し、アンテナから出力
される信号の送信電力を制御する。つまり、受信信号強
度が大きいときは相手局との距離が近いと判断し、送信
電力を小さくし、逆に、受信信号強度が小さいときは相
手局との距離が遠いと判断して、送信電力を大きくす
る。The received signal evaluation section 7 measures the received signal strength of the partner station and outputs the measurement result to the control section 8. Control unit 8
Calculates the optimum transmission power of its own station from the received signal strength, sets the power value in the transmission power control unit 3, and controls the transmission power of the signal output from the antenna. That is, when the received signal strength is large, it is determined that the distance to the partner station is short, and the transmission power is reduced. Conversely, when the received signal strength is small, it is determined that the distance to the partner station is long, and the transmission power is To increase.
【００１６】さらに制御部８は、この時の送信電力値を
送信電力値記憶部９に記憶する。Further, the control unit 8 stores the transmission power value at this time in the transmission power value storage unit 9.
【００１７】また、この無線電話装置に着呼があった場
合にも、同様に、受信信号評価部７がその信号の受信信
号強度を測定し、制御部８が受信信号強度から自局の最
適送信電力を求めて送信電力制御部３を設定すると共
に、その電力値を送信電力値記憶部９に記憶する。Also, when an incoming call is made to this radio telephone device, similarly, the reception signal evaluation unit 7 measures the reception signal strength of the signal, and the control unit 8 determines the optimum value of the local station from the reception signal strength. The transmission power is obtained and the transmission power control unit 3 is set, and the power value is stored in the transmission power value storage unit 9.
【００１８】２回目以降の発呼では、制御部８は、送信
電力値記憶部９に記憶されている前回の最適送信電力値
を読み出し、その電力値を送信電力制御部３の初期値と
して設定する。In the second and subsequent calls, the control unit 8 reads the last optimum transmission power value stored in the transmission power value storage unit 9 and sets the power value as the initial value of the transmission power control unit 3. To do.
【００１９】発呼信号は、送信信号電力増幅部４を介し
て、設定された送信出力によりアンテナから相手局に送
信される。The calling signal is transmitted from the antenna to the partner station by the set transmission output through the transmission signal power amplifier 4.
【００２０】この発呼信号の送信電力値が相手局との距
離に比べて十分な強さである場合は、相手局は、この発
呼信号を受信することができ、受信した相手局は、応答
信号を返す。When the transmission power value of the calling signal is sufficiently strong compared to the distance to the partner station, the partner station can receive the call signal, and the partner station that receives the Returns the response signal.
【００２１】応答信号を受信した無線電話装置では、従
来と同様の手順で、制御部８が相手局からの受信信号強
度により送信電力を最適な状態に制御し、それと同時
に、その送信電力値を送信電力値記憶部９に記憶して、
次回の発呼等の無線接続時の送信電力初期値として使用
する。In the radiotelephone device that has received the response signal, the control unit 8 controls the transmission power to the optimum state according to the received signal strength from the partner station, and at the same time, the transmission power value Stored in the transmission power value storage unit 9,
It is used as the initial value of the transmission power at the time of wireless connection such as the next call.
【００２２】制御部８が送信電力値記憶部９から読み出
す送信電力値は、前回の通信に成功した送信電力値であ
るから、自局と相手局との位置関係に大きな変化がなけ
れば、今回の通信も成功する確率が極めて高い。そし
て、この通信に成功した場合は、通信開始時の不必要な
電力消費や近隣の他の無線システムへの妨害を避けるこ
とができる。Since the transmission power value read out from the transmission power value storage unit 9 by the control unit 8 is the transmission power value that succeeded in the previous communication, if there is no great change in the positional relationship between the own station and the partner station, this time. The probability of successful communication is extremely high. If this communication is successful, unnecessary power consumption at the start of communication and interference with other wireless systems in the vicinity can be avoided.
【００２３】発呼信号の送信電力値が相手局との距離に
比べて小さい場合は、相手局は、この発呼信号を受信す
ることができず、従って相手局から応答信号が返らな
い。制御部８は、相手局からの応答信号が予め指定され
た時間内に、電話部１を介して検知できない場合は、送
信電力が小さいと判断して、送信電力制御部３に設定す
る送信電力を予め決められた規定値（例えば、最大値）
まで増やし、同時に、送信電力値記憶部９の値を更新す
る。When the transmission power value of the calling signal is smaller than the distance from the partner station, the partner station cannot receive this call signal, and therefore the reply signal is not returned from the partner station. When the response signal from the partner station cannot be detected via the telephone unit 1 within a predetermined time, the control unit 8 determines that the transmission power is low and sets the transmission power to the transmission power control unit 3. Is a prescribed value (for example, maximum value)
And at the same time, the value of the transmission power value storage unit 9 is updated.
【００２４】この送信電力の増加により相手局との接続
が確認できれば、以後は従来と同様に、相手局から受信
した信号の強度に基づいて送信電力を最適値に調整し、
また、この最適値を送信電力値記憶部９に記憶する。ま
た、相手局との接続が確認できなければ、更に送信電力
を増加して、上記の処理を繰り返す。送信電力を最大電
力にまで増加しても接続できない場合は、相手局が通話
圏外に居るものと判断し、発呼処理を終了する。If the connection with the other station can be confirmed by the increase of the transmission power, then the transmission power is adjusted to the optimum value based on the strength of the signal received from the other station, as in the conventional case.
The optimum value is stored in the transmission power value storage unit 9. If the connection with the partner station cannot be confirmed, the transmission power is further increased and the above processing is repeated. If the connection cannot be established even if the transmission power is increased to the maximum power, it is determined that the partner station is out of the communication range, and the calling process ends.
【００２５】このように、実施例の無線電話装置では、
無線接続時の送信電力初期値に、前回の通信における最
適送信電力値を用いるので、送信電力値初期値を一律に
最大値に設定する従来の無線電話装置に比べて、接続時
の送信電力が低く設定されることになる。As described above, in the wireless telephone device of the embodiment,
Since the optimum transmission power value in the previous communication is used as the transmission power initial value at the time of wireless connection, the transmission power at connection is higher than that of the conventional wireless telephone device that uniformly sets the initial value of the transmission power value to the maximum value. It will be set low.
【００２６】なお、実施例の無線電話装置では、相手局
の受信信号強度を評価して送信電力を制御しているが、
相手局との間で相手方の送信出力を指定する制御データ
を交換し、そのデータに基づいて送信電力を制御する
等、他の方法による制御を行なうことも可能である。In the wireless telephone device of the embodiment, the transmission power is controlled by evaluating the reception signal strength of the partner station.
It is also possible to perform control by another method, such as exchanging control data designating the transmission output of the partner with the partner station and controlling the transmission power based on the data.
【００２７】[0027]
【発明の効果】以上の実施例の説明から明らかなよう
に、本発明の無線電話装置では、相手局との無線接続時
に、送信電力が不必要に大きくなることを防ぐことがで
き、無駄な電力消費を抑え、近隣の他の無線システムへ
の妨害を極力少なくすることができる。As is apparent from the above description of the embodiments, in the wireless telephone device of the present invention, it is possible to prevent the transmission power from unnecessarily increasing during the wireless connection with the partner station, which is wasteful. Power consumption can be suppressed and interference with other wireless systems in the vicinity can be minimized.
【図１】本発明の一実施例における無線電話装置の構成
を示すブロック図、FIG. 1 is a block diagram showing a configuration of a wireless telephone device according to an embodiment of the present invention,
【図２】従来の無線電話装置の構成を示すブロック図で
ある。FIG. 2 is a block diagram showing a configuration of a conventional wireless telephone device.
１ 電話部 ２ 変調部 ３ 送信電力制御部 ４ 送信信号電力増幅部 ５ 受信信号増幅部 ６ 復調部 ７ 受信信号強度評価部 ８ 制御部 ９ 送信電力値記憶部 DESCRIPTION OF SYMBOLS 1 Telephone section 2 Modulation section 3 Transmission power control section 4 Transmission signal power amplification section 5 Received signal amplification section 6 Demodulation section 7 Received signal strength evaluation section 8 Control section 9 Transmission power value storage section
Claims (1)
ベルを制御する制御手段を備えた無線電話装置におい
て、 前回の通信の送信電力レベルを記憶する記憶手段を設
け、前記制御手段が、前記記憶手段に記憶された送信電
力レベルを次回の無線接続時における初期送信電力レベ
ルに設定することを特徴とする無線電話装置。1. A radiotelephone device comprising a control means for controlling a transmission power level according to a communication state with a partner station, a storage means for storing a transmission power level of a previous communication is provided, and the control means comprises: A radiotelephone device, wherein the transmission power level stored in the storage means is set to an initial transmission power level for the next wireless connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195232A JPH0730483A (en) | 1993-07-13 | 1993-07-13 | Radio telephone equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195232A JPH0730483A (en) | 1993-07-13 | 1993-07-13 | Radio telephone equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0730483A true JPH0730483A (en) | 1995-01-31 |
Family
ID=16337684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5195232A Pending JPH0730483A (en) | 1993-07-13 | 1993-07-13 | Radio telephone equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730483A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2343588A (en) * | 1998-11-06 | 2000-05-10 | Nokia Mobile Phones Ltd | Transmission power setting in a radio terminal |
| JP2001057584A (en) * | 1999-06-23 | 2001-02-27 | Sony Internatl Europ Gmbh | Method for generating topology map and network terminal |
| JP2004193851A (en) * | 2002-12-10 | 2004-07-08 | Nec Corp | Mobile terminal and transmission power control method thereof |
| JP2008125125A (en) * | 2008-02-04 | 2008-05-29 | Kyocera Corp | Radio communication system switching method and communication terminal |
| JPWO2006103888A1 (en) * | 2005-03-25 | 2008-09-04 | パイオニア株式会社 | Directional communication apparatus, communication method and communication program, and communication system using directional communication apparatus |
| JP2009247022A (en) * | 1995-06-30 | 2009-10-22 | Interdigital Technol Corp | Spread-spectrum communication system saving power consumption of transmitting/receiving station during inactivation |
| US7801516B2 (en) | 2003-05-29 | 2010-09-21 | Kyocera Corporation | Communication terminal out of range determination method, wireless communication system switching method and communication terminal |
| JP2014027377A (en) * | 2012-07-25 | 2014-02-06 | Hochiki Corp | Meeting notification system |
-
1993
- 1993-07-13 JP JP5195232A patent/JPH0730483A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009247022A (en) * | 1995-06-30 | 2009-10-22 | Interdigital Technol Corp | Spread-spectrum communication system saving power consumption of transmitting/receiving station during inactivation |
| JP2010273380A (en) * | 1995-06-30 | 2010-12-02 | Interdigital Technol Corp | Spread spectrum communication system for saving power consumption of transceiver station during inactivity |
| GB2343588A (en) * | 1998-11-06 | 2000-05-10 | Nokia Mobile Phones Ltd | Transmission power setting in a radio terminal |
| JP2001057584A (en) * | 1999-06-23 | 2001-02-27 | Sony Internatl Europ Gmbh | Method for generating topology map and network terminal |
| JP2004193851A (en) * | 2002-12-10 | 2004-07-08 | Nec Corp | Mobile terminal and transmission power control method thereof |
| US7801516B2 (en) | 2003-05-29 | 2010-09-21 | Kyocera Corporation | Communication terminal out of range determination method, wireless communication system switching method and communication terminal |
| US8145204B2 (en) | 2003-05-29 | 2012-03-27 | Kyocera Corporation | Communication terminal out of range determination method, wireless communication system switching method and communication terminal |
| JPWO2006103888A1 (en) * | 2005-03-25 | 2008-09-04 | パイオニア株式会社 | Directional communication apparatus, communication method and communication program, and communication system using directional communication apparatus |
| JP2008125125A (en) * | 2008-02-04 | 2008-05-29 | Kyocera Corp | Radio communication system switching method and communication terminal |
| JP4519177B2 (en) * | 2008-02-04 | 2010-08-04 | 京セラ株式会社 | Wireless communication system switching method and communication terminal |
| JP2014027377A (en) * | 2012-07-25 | 2014-02-06 | Hochiki Corp | Meeting notification system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6442375B1 (en) | Systems and methods for maintaining operation of a receiver co-located with a transmitter and susceptible to interference therefrom by desensitization of the receiver | |
| JPH08256102A (en) | Cellular system | |
| US20080176594A1 (en) | Apparatus for controlling radiation power in dual mode mobile terminal and method thereof | |
| JPH06326631A (en) | Radio communication equipment | |
| EP1104119B1 (en) | Transmitter adjusting output power | |
| JPH0730483A (en) | Radio telephone equipment | |
| JP2006279855A (en) | Wireless communication system and communication control method thereof | |
| JP3135832B2 (en) | Composite terminal for mobile communication | |
| JP4173405B2 (en) | Communication terminal out-of-range determination method, communication terminal | |
| JP2000349704A (en) | Radio communication unit, transmission power control method for radio communication unit and recording medium | |
| JP4048589B2 (en) | Transmission power control system for mobile phones | |
| US8199795B2 (en) | Communication device and data transmission method between at least two communication devices | |
| JP2003078470A (en) | Battery saving method, mobile equipment, storage medium with battery save processing program recorded thereon | |
| JPS60261228A (en) | Transceiver | |
| JP3056853B2 (en) | Wireless communication device | |
| JP4962479B2 (en) | Wireless communication device with transmission power control function | |
| JP3156652B2 (en) | Mobile wireless communication device | |
| JPH0332122A (en) | Transmission output control system for mobile communication terminal equipment | |
| JPH01286528A (en) | Transmission output control method | |
| JPH1093503A (en) | Transmission output saving device | |
| JP3081460B2 (en) | Wireless communication device | |
| JPS6313525A (en) | Portable radio equipment | |
| JP3266227B2 (en) | Wireless telephone equipment | |
| JP2016119523A (en) | Communication device | |
| JP3499771B2 (en) | Cordless telephone equipment |