JPH08265252A - Transmission power control method for small-sized radio equipment - Google Patents
Transmission power control method for small-sized radio equipmentInfo
- Publication number
- JPH08265252A JPH08265252A JP7066413A JP6641395A JPH08265252A JP H08265252 A JPH08265252 A JP H08265252A JP 7066413 A JP7066413 A JP 7066413A JP 6641395 A JP6641395 A JP 6641395A JP H08265252 A JPH08265252 A JP H08265252A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- transmission power
- signal
- small
- fixed station
- 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、送信電力用増幅器の増
幅率を制御するハンディーターミナル型無線機に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handy terminal type radio which controls the amplification factor of a transmission power amplifier.
【０００２】[0002]
【従来の技術】ハンディーターミナル型無線機によって
近傍の相手局と相互通信を行う場合、不必要に大きな送
信電力を出力すると他の送受信機に混信などの電波妨害
を与える場合がある。2. Description of the Related Art When a handy terminal type radio device is used for mutual communication with a nearby partner station, output of an unnecessarily large transmission power may cause radio interference such as interference to other transceivers.
【０００３】このような点から、従来のハンディーター
ミナル型無線機は、送信出力レベルが最大でも１０ｍＷ
しかなく、また、小型でコストの掛からない構成にする
必要性から送信電力の制御は行っていなかった。From such a point, the conventional handy terminal type radio has a maximum transmission output level of 10 mW.
However, the transmission power was not controlled because of the necessity of making the configuration small and inexpensive.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、送信電
力の制御を行わない従来のハンディーターミナル型無線
機においては、データ送信時の消費電力が大きい為に電
池パック寿命が短く、この結果、使用時間を延ばすこと
が難しく、また、送信出力制御回路が複雑で回路の小型
化が難しい等の課題を有していた。However, in the conventional handy terminal type radio which does not control the transmission power, the battery pack life is short because the power consumption during data transmission is large, and as a result, the operating time is shortened. It is difficult to extend the length, and the transmission output control circuit is complicated and it is difficult to reduce the size of the circuit.
【０００５】本願発明の目的は、上記従来の課題を解決
し、使用環境によってデータ送信を低い消費電力に押さ
え、電池寿命を延ばして使用時間を長くしたハンディー
ターミナル型無線機を得ることにある。本願発明の他の
目的は、単純な回路で送信出力制御回路を実現し、小型
な軽量のハンディーターミナル型無線機を得ることにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and to obtain a handy terminal type radio which suppresses data transmission to low power consumption depending on use environment, extends battery life and extends use time. Another object of the present invention is to realize a transmission output control circuit with a simple circuit and obtain a compact and lightweight handy terminal type radio device.
【０００６】[0006]
【課題を解決するための手段】上記従来の課題を解決す
るため、固定の親局に対してハンディーターミナル型無
線機が近くにある場合には送信電力を絞って通信を行
い、前記ハンディーターミナル型無線機と前記親局とが
離れた位置から通信を行う場合には送信電力を高くして
通信を行うようにしたものであり、単純な送信出力制御
回路で低消費電流のハンディーターミナル型無線機を実
現するものである。In order to solve the above-mentioned conventional problems, when a handy terminal type radio is located near a fixed master station, the transmission power is reduced to perform communication, and the handy terminal type is used. When communicating from a position where the wireless device and the master station are distant from each other, the transmission power is increased to perform the communication, and a handy terminal type wireless device having a simple transmission output control circuit and low current consumption. Is realized.
【０００７】[0007]
【作用】本願発明によれば、ハンディーターミナル型無
線機から固定の親局に対して接続要求信号を送信する
際、最初に送信電力増幅器の電圧を低くして送信を行
い、ハンディーターミナル型無線機が前記親局からの接
続応答信号を受信できれば送信電力はそのまま低くした
状態で通信を行うが、前記ハンディーターミナル型無線
機が前記親局からの接続応答信号を受信できない場合
は、前記親局と前記ハンディーターミナル型無線機の距
離が離れていると判断し、前記ハンディーターミナル型
無線機の送信電力増幅器の送信電力を高くして通信を行
うようにして確実な通信と低消費電流化を実現するもの
である。According to the present invention, when the connection request signal is transmitted from the handy terminal type radio to the fixed master station, the voltage of the transmission power amplifier is first lowered to perform transmission. If it can receive the connection response signal from the master station, it communicates with the transmission power kept low, but if the handy terminal type radio cannot receive the connection response signal from the master station, it communicates with the master station. When it is determined that the handy terminal type wireless device is far away, communication is performed by increasing the transmission power of the transmission power amplifier of the handy terminal type wireless device to realize reliable communication and low current consumption. It is a thing.
【０００８】[0008]
【実施例】以下に、本願発明の実施例を図面に基づいて
詳細に説明する。第１図は、本願発明の実施例であり送
信電力制御部を備えたダブルスーパーへテロダイン方式
による移動無線機の構成を説明したブロック図である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram illustrating the configuration of a mobile radio device of a double super heterodyne system including a transmission power control unit according to an embodiment of the present invention.
【０００９】本実施例によれば、特定の送信周波数での
送信および特定の受信周波数での受信を行うアンテナ１
と、該アンテナ１で受信した特定の受信周波数のみを通
過させる第１のバンドパスフィルタ８と、該第１のバン
ドパスフィルタ８を通過した受信信号を増幅する受信電
力増幅器９と、該受信電力増幅器９を通過した信号と前
記信号を任意の周波数に変換する第１の信号発生器７か
らの信号を同時に入力する第１周波数変換器１０と、該
第１周波数変換器１０によって作り出された信号から任
意の周波数のみを取り出す第２のバンドパスフィルタ１
１と、該第２のバンドパスフィルタ１１を通過した信号
を増幅する増幅器１２と、該増幅器１２を通過した信号
と前記信号を任意の周波数に変換する第２の信号発生器
１４からの信号を同時に入力する第２周波数変換器１３
と、該第２周波数変換器１３によって作り出された信号
から任意の周波数のみを取り出す第３のバンドパスフィ
ルタ１５と、該バンドパスフィルタ１５から出力される
信号を周波数検波し、所望の周波数に応じたＤＣレベル
を出力する周波数検波器１６と、該周波数検波器１６の
検波信号を受信してデータ解析を行い、データが親機か
らの接続応答信号であるか否かを判別し、判別信号を出
力するＣＰＵ１７と、該ＣＰＵ１７からの前記判別信号
により、後段の送信電力増幅器４の電圧を制御する送信
電力制御回路６と、出力する送信データを介して変調を
かけ、任意の送信周波数を発生させる前記第１の信号発
生器７によって生成された信号を、バンドスイッチを経
由して前記送信電力増幅器４に送り、この信号を該送信
電力増幅器４で増幅し、増幅された信号だけを通過させ
る第１のバンドパスフィルタ３を介して前記信号を前記
アンテナ１より送信するように構成されたものである。According to the present embodiment, the antenna 1 that performs transmission at a specific transmission frequency and reception at a specific reception frequency
A first bandpass filter 8 that passes only a specific reception frequency received by the antenna 1, a reception power amplifier 9 that amplifies a reception signal that has passed through the first bandpass filter 8, and the reception power A first frequency converter 10 for simultaneously inputting a signal passed through an amplifier 9 and a signal from a first signal generator 7 for converting the signal to an arbitrary frequency, and a signal generated by the first frequency converter 10. Second bandpass filter 1 for extracting only arbitrary frequencies from
1, an amplifier 12 that amplifies a signal that has passed through the second bandpass filter 11, a signal that has passed through the amplifier 12, and a signal from a second signal generator 14 that converts the signal into an arbitrary frequency. Second frequency converter 13 that inputs at the same time
And a third bandpass filter 15 for extracting only an arbitrary frequency from the signal generated by the second frequency converter 13, and a signal output from the bandpass filter 15 are frequency-detected to obtain a desired frequency. The frequency detector 16 that outputs a DC level and the detection signal of the frequency detector 16 are received and data analysis is performed to determine whether or not the data is a connection response signal from the master unit, and a determination signal is output. The CPU 17 for outputting and the transmission power control circuit 6 for controlling the voltage of the transmission power amplifier 4 at the subsequent stage by the discrimination signal from the CPU 17, and the transmission data to be output are modulated to generate an arbitrary transmission frequency. The signal generated by the first signal generator 7 is sent to the transmission power amplifier 4 via a band switch, and this signal is amplified by the transmission power amplifier 4. And, in which the signal through the first bandpass filter 3 which passes only the amplified signal is configured to transmit from the antenna 1.
【００１０】次に、上記実施例でハンディターミナル型
無線機が固定の親局の近傍に位置する場合の動作につい
て図２のフローチャートに基づき説明する。固定された
親局近傍にハンディターミナル型無線機が位置し、前記
ハンディターミナル型無線機から親局へのデータ送信要
求が発生した時（ステップ１０１）、前記ハンディター
ミナル型無線機に内蔵されたＣＰＵ１７は信号発生器７
によって生成された信号を送信周波数として設定し、こ
の信号を送信出力制御回路６に送り、該送信出力制御回
路６では前記信号に基づいて送信電力増幅回路４の電圧
を下げ、送信出力を低くした後で送受信切り替えスイッ
チ２及びバンドスイッチ５を送信設定に切り替え、同時
に送信データによって第１の信号発生器７に変調をかけ
て接続要求信号を送信する（ステップ１０２）。送信さ
れた前記接続要求信号は親局で受信し（ステップ１０
６）、次に親局から接続応答信号を送信するが（ステッ
プ１０７）、その間に前記ハンディターミナル型無線機
は前記ＣＰＵ１７によって信号発生器７を受信用周波数
設定後、送受信切り替えスイッチ２及びバンドスイッチ
５を受信設定に切り替えて受信待ち状態にし、親局から
の接続応答信号を待って、前記親局からの接続応答信号
をＣＰＵ１７で確認後（ステップ１０３）、親局との通
信を開始し（ステップ１０４，１０８）、通信終了後、
前記ハンディターミナル型無線機の無線部は電源を切
り、親局は待ち受け状態となる。Next, the operation when the handy terminal type radio is located near the fixed master station in the above embodiment will be described with reference to the flow chart of FIG. When the handy terminal type radio is located near the fixed master station and a data transmission request is issued from the handy terminal type radio to the master station (step 101), the CPU 17 built in the handy terminal type radio Is the signal generator 7
The signal generated by is set as the transmission frequency, this signal is sent to the transmission output control circuit 6, and the transmission output control circuit 6 lowers the voltage of the transmission power amplification circuit 4 based on the signal to lower the transmission output. After that, the transmission / reception changeover switch 2 and the band switch 5 are switched to the transmission setting, and at the same time, the first signal generator 7 is modulated by the transmission data and the connection request signal is transmitted (step 102). The master station receives the transmitted connection request signal (step 10).
6) Next, a connection response signal is transmitted from the master station (step 107), during which the handheld terminal radio sets the signal generator 7 by the CPU 17 for reception frequency, and then the transmission / reception changeover switch 2 and band switch. 5 is switched to the reception setting to be in a reception waiting state, waits for a connection response signal from the master station, and after confirming the connection response signal from the master station by the CPU 17 (step 103), communication with the master station is started ( (Steps 104, 108), after communication is completed,
The wireless unit of the handy terminal type wireless device is turned off, and the master station is in a standby state.
【００１１】さらに、図３に示すフローチャートに基づ
いて、前記ハンディターミナル型無線機が固定の親局か
ら離れた場所に位置する場合の動作について説明する。
前記ハンディターミナル型無線機から親局に対するデー
タ送信要求が発生した時（ステップ２０１）、前記ハン
ディターミナル型無線機のＣＰＵ１７は第１の信号発生
器７を送信周波数に設定して信号を送信出力制御回路６
に送り、この結果、送信電力増幅回路４の電圧を下げ送
信出力を低くした後、送受信切り替えスイッチ２及びバ
ンドスイッチ５を送信設定に切り替え、その後、送信デ
ータによって信号発生器７に変調を掛け接続要求信号を
送信する（ステップ２０２）。送信された接続要求信号
の電波が弱く受信困難であると（ステップ２１１）、親
局は待受状態のままとなり（ステップ２１２）、一方、
前記ハンディターミナル型無線機は内蔵のＣＰＵ１７が
親局からの接続応答信号を一定期間の間に確認できない
時には待ち受け状態になり（ステップ２０４）、再度Ｃ
ＰＵ１７により信号発生器７を送信周波数に設定し、こ
の信号を送信出力制御回路６に送り、送信電力増幅回路
４の電圧を上げて送信出力を上げた後（ステップ２０
５）、送受信切り替えスイッチ２及びバンドスイッチ５
を送信設定にし、送信データによって前記信号発生器７
に変調を掛け親機に対する接続要求信号を送信し（ステ
ップ２０６）、このハンディターミナル型無線機からの
接続要求信号を親局が受信し（ステップ２１３）、前記
接続要求信号が親局に受信された時、親局より接続応答
信号を送信するが（ステップ２１４）、その間、前記ハ
ンディターミナル型無線機はＣＰＵ１７によって信号発
生器７を受信用周波数に設定し、送受信切り替えスイッ
チ２及びバンドスイッチ５を受信設定にして受信待ち状
態となって親局からの接続応答信号を待ち、親局からの
接続応答信号をＣＰＵ１７で確認すると（ステップ２０
７）親局との通信を開始し（ステップ２０８，２１
５）、通信が終了後、前記ハンディターミナル型無線機
の無線部は電源を切り、親局は待ち受け状態となる。Further, the operation when the handy terminal type radio is located away from the fixed master station will be described with reference to the flow chart shown in FIG.
When a data transmission request to the master station is generated from the handy terminal type wireless device (step 201), the CPU 17 of the handy terminal type wireless device sets the first signal generator 7 to the transmission frequency and controls the transmission output of the signal. Circuit 6
As a result, the voltage of the transmission power amplifier circuit 4 is lowered and the transmission output is lowered, and then the transmission / reception changeover switch 2 and the band switch 5 are switched to the transmission setting, and then the signal generator 7 is modulated by the transmission data and connected. A request signal is transmitted (step 202). When the radio wave of the transmitted connection request signal is weak and it is difficult to receive the signal (step 211), the master station remains in the standby state (step 212).
When the built-in CPU 17 cannot confirm the connection response signal from the master station within a certain period of time, the handy terminal type wireless device enters a standby state (step 204), and C again.
After the signal generator 7 is set to the transmission frequency by the PU 17 and this signal is sent to the transmission output control circuit 6, the voltage of the transmission power amplification circuit 4 is increased to increase the transmission output (step 20).
5), transmission / reception changeover switch 2 and band switch 5
To the transmission setting, and the signal generator 7 is set according to the transmission data.
To transmit a connection request signal to the master unit (step 206), the master station receives the connection request signal from the handy terminal type wireless device (step 213), and the connection request signal is received by the master station. Then, the connection response signal is transmitted from the master station (step 214), while the handy terminal type radio sets the signal generator 7 to the reception frequency by the CPU 17 during that period, and the transmission / reception changeover switch 2 and the band switch 5 are set. When the reception setting is set, the reception waiting state is waited for the connection response signal from the master station, and the CPU 17 confirms the connection response signal from the master station (step 20).
7) Start communication with the master station (steps 208, 21)
5) After the communication is completed, the power of the wireless unit of the handy terminal type wireless device is turned off, and the master station enters the standby state.
【００１２】また、前記ハンディターミナル型無線機が
固定の親局からサービスエリア外に位置した場合の動作
について、図４のフローチャートに基づいて説明する。
前記ハンディターミナル型無線機が固定の親局からサー
ビスエリア外に位置した状態で固定の親局へのデータ送
信要求が発生した時（ステップ３０１）、前記ハンディ
ターミナル型無線機のＣＰＵ１７は信号発生器７を送信
周波数に設定して送信出力制御回路６に信号を送り、こ
の信号を基に送信電力増幅回路４の電圧を下げて送信出
力を絞った後（ステップ３０２）、送受信切り替えスイ
ッチ２及びバンドスイッチ５を送信設定に切り換え、そ
の後、ハンディターミナル型無線機からの送信データに
よって信号発生器７に変調をかけて親機に対する接続要
求信号を送信し（ステップ３０３）、送信された接続要
求信号の電波が弱く、親局が受信不可能であると、該親
局は依然待受状態を維持する。一方、その間に前記ハン
ディターミナル型無線機は、ＣＰＵ１７によって信号発
生器７を受信用周波数設定し、送受信切り換えスイッチ
２及びバンドスイッチ５を受信設定とし、受信待ち状態
にし親局からの接続応答信号を待つ。この状態で一定期
間内に親局からの接続応答信号をＣＰＵ１７が確認でき
ない時（ステップ３０４）、前記ＣＰＵ１７は信号発生
器７を再度送信周波数に設定してその信号を送信出力制
御回路６に送り、前記送信電力増幅回路４の電圧を大き
くして送信出力を上げた後（ステップ３０５）、送受信
切り換えスイッチ２及びバンドスイッチ５を送信設定に
し、ハンディターミナル型無線機からの送信データによ
って信号発生器７に変調をかけて親局に対して接続要求
信号を送信するが（ステップ３０３）、送信された接続
要求信号が送信出力レベルを上げたにも関わらず前記ハ
ンディターミナル型無線機からの信号を親局で受信出来
ない時、ＣＰＵ１７はハンディターミナル型無線機が圏
外にいると判断し、圏外表示を出して無線部の電源を切
る（ステップ３０６）。The operation when the handy terminal type radio is located outside the service area from the fixed master station will be described with reference to the flowchart of FIG.
When a data transmission request is made to the fixed master station while the handy terminal type radio is located outside the service area from the fixed master station (step 301), the CPU 17 of the handy terminal type radio sets the signal generator. 7 is set to the transmission frequency, a signal is sent to the transmission output control circuit 6, the voltage of the transmission power amplification circuit 4 is lowered based on this signal to narrow down the transmission output (step 302), and then the transmission / reception switch 2 and band The switch 5 is switched to the transmission setting, and then the signal generator 7 is modulated by the transmission data from the handy terminal type wireless device to transmit the connection request signal to the master unit (step 303). When the radio wave is weak and the master station cannot receive the signal, the master station still maintains the standby state. On the other hand, in the meantime, the handy terminal type wireless device sets the signal generator 7 for receiving frequency by the CPU 17, sets the transmission / reception changeover switch 2 and the band switch 5 to the reception setting, and puts in the reception waiting state to receive the connection response signal from the master station. wait. In this state, when the CPU 17 cannot confirm the connection response signal from the master station within a certain period (step 304), the CPU 17 sets the signal generator 7 to the transmission frequency again and sends the signal to the transmission output control circuit 6. After increasing the voltage of the transmission power amplification circuit 4 to increase the transmission output (step 305), the transmission / reception changeover switch 2 and the band switch 5 are set to the transmission setting, and the signal generator is generated by the transmission data from the handy terminal type radio. 7 is transmitted and a connection request signal is transmitted to the master station (step 303), but the signal from the handy terminal type radio is transmitted even though the transmitted connection request signal raises the transmission output level. When the master station cannot receive the signal, the CPU 17 determines that the handy terminal type radio is out of range, displays an out-of-range indication, and turns off the power of the radio unit. (Step 306).
【００１３】上記各実施例における一連の動作から、接
続要求信号は最小の送信電力から順次に送信電力を高く
するようにしたので、消費電流を減らす事が出来、且つ
構造が単純であるので小型化が容易である。From the series of operations in each of the above-described embodiments, the transmission power of the connection request signal is sequentially increased from the minimum transmission power, so that the current consumption can be reduced and the structure is simple, so that the size is small. It is easy to convert.
【００１４】[0014]
【発明の効果】本発明の送信電力増幅制御回路及びシス
テムを使用することによってデータ送信時に、小さな消
費電力で電池の寿命を延ばすことが出来、この結果、ハ
ンディターミナル型無線機の使用時間を延ばすことがで
き、また、単純な送信出力制御回路によって実現するこ
とができるので、小型なハンディーターミナル型無線機
を得ることができる等の効果を有する。By using the transmission power amplification control circuit and system of the present invention, it is possible to extend the battery life with small power consumption during data transmission, and as a result, extend the operating time of the handy terminal type radio. In addition, since it can be realized by a simple transmission output control circuit, there is an effect that a small handy terminal type radio can be obtained.
【図１】本考案のハンディーターミナル型無線機の構成
を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a handy terminal type wireless device of the present invention.
【図２】固定の親局とハンディーターミナル型無線機の
通信制御手順を示すフローチャートである。FIG. 2 is a flowchart showing a communication control procedure between a fixed master station and a handy terminal type wireless device.
【図３】固定の親局とハンディーターミナル型無線機の
通信制御手順を示すフローチャートである。FIG. 3 is a flowchart showing a communication control procedure between a fixed master station and a handy terminal type wireless device.
【図４】固定の親局とハンディーターミナル型無線機の
通信制御手順を示すフローチャートである。FIG. 4 is a flowchart showing a communication control procedure between a fixed master station and a handy terminal type wireless device.
１ アンテナ ４ 送信電力増幅器 ５ 送信電力制御回路 １７ ＣＰＵ 1 Antenna 4 Transmission Power Amplifier 5 Transmission Power Control Circuit 17 CPU
Claims (2)
データの送受信機能を有する小型無線機の相互通信にお
いて、前記小型無線機にデータの送信出力を可変する送
信出力制御回路を設け、前記小型無線機は固定の固定局
に対して低い送信電力で接続要求信号を送信し、前記固
定局からの接続応答信号を受信した時、前記小型無線機
は低い送信電力のままで通信を行い、固定局からの接続
応答信号を受信できない時は、送信電力を高くして通信
を行う事を特徴とする小型無線機用送信電力制御方法。1. A fixed station having a data transmitting / receiving function,
In mutual communication of a small radio having a data transmission / reception function, the small radio is provided with a transmission output control circuit for varying the data transmission output, and the small radio is connected to a fixed station with low transmission power. When the request signal is transmitted and the connection response signal from the fixed station is received, the small radio communicates with the low transmission power, and when the connection response signal from the fixed station cannot be received, the transmission power is reduced. A transmission power control method for a small wireless device, which is characterized by increasing communication.
号を送った後、固定局からの接続応答信号を入力しない
時、前記小型無線機は無線部の電源を切断することを特
徴とする請求項１記載の小型無線機用送信電力制御方
法。2. The small radio cuts off the power supply to the radio unit when the small radio transmits no connection response signal from the fixed station after transmitting the connection request signal with high transmission power. The transmission power control method for a small radio device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7066413A JPH08265252A (en) | 1995-03-24 | 1995-03-24 | Transmission power control method for small-sized radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7066413A JPH08265252A (en) | 1995-03-24 | 1995-03-24 | Transmission power control method for small-sized radio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08265252A true JPH08265252A (en) | 1996-10-11 |
Family
ID=13315095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7066413A Pending JPH08265252A (en) | 1995-03-24 | 1995-03-24 | Transmission power control method for small-sized radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08265252A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003500888A (en) * | 1999-05-13 | 2003-01-07 | ハネウェル・インコーポレーテッド | Wireless system with transmit power control |
| JP2008125125A (en) * | 2008-02-04 | 2008-05-29 | Kyocera Corp | Radio communication system switching method and communication terminal |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03231523A (en) * | 1990-02-07 | 1991-10-15 | Nippon Telegr & Teleph Corp <Ntt> | Mobile communication control system |
| JPH06311079A (en) * | 1993-04-27 | 1994-11-04 | Sharp Corp | Mobile telephone set with automatic power-off function |
-
1995
- 1995-03-24 JP JP7066413A patent/JPH08265252A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03231523A (en) * | 1990-02-07 | 1991-10-15 | Nippon Telegr & Teleph Corp <Ntt> | Mobile communication control system |
| JPH06311079A (en) * | 1993-04-27 | 1994-11-04 | Sharp Corp | Mobile telephone set with automatic power-off function |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003500888A (en) * | 1999-05-13 | 2003-01-07 | ハネウェル・インコーポレーテッド | Wireless system with transmit power control |
| JP4906192B2 (en) * | 1999-05-13 | 2012-03-28 | ハネウェル・インターナショナル・インコーポレーテッド | Wireless system with transmit power control |
| 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 |
| 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 |
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