JPH05160777A - Radio transmission power control system - Google Patents
Radio transmission power control systemInfo
- Publication number
- JPH05160777A JPH05160777A JP31878691A JP31878691A JPH05160777A JP H05160777 A JPH05160777 A JP H05160777A JP 31878691 A JP31878691 A JP 31878691A JP 31878691 A JP31878691 A JP 31878691A JP H05160777 A JPH05160777 A JP H05160777A
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- station
- wireless communication
- transmission
- radio wave
- 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.)
- Granted
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は無線送信電力制御方式に
関し,特に,無線通信センタ装置の総括のもとに無線通
信を行なう無線端末装置の送信電力の過大,過小を排除
し,無線通信を確保しうる最小の適正レベルに自動的に
制御する送信電力制御方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless transmission power control system, and more particularly, to a wireless communication center device to eliminate excessive or excessive transmission power of a wireless terminal device which performs wireless communication under the control of the wireless communication center device. The present invention relates to a transmission power control method for automatically controlling to a minimum appropriate level that can be secured.
【0002】[0002]
【従来の技術】この種の無線端末装置は,電源として電
池を利用するものも多く,従って送信電力は相手局との
無線通信が確保できる最小の適正なレベルに保持される
ことが望ましいが,従来の無線端末装置の送信電力は常
時一定のレベルに固定されていた。2. Description of the Related Art Many wireless terminals of this type use a battery as a power source. Therefore, it is desirable that the transmission power be maintained at a minimum appropriate level for ensuring wireless communication with a partner station. The transmission power of a conventional wireless terminal device is always fixed at a constant level.
【0003】[0003]
【発明が解決しようとする課題】上述した従来の無線端
末装置では,無線通信を可能とする運用範囲内の全ての
場所で通信が可能となるように,運用範囲内で最大電力
で送受信しなければならない場所を基準として送信電力
を固定値に設定している。In the above-mentioned conventional wireless terminal device, it is necessary to perform transmission / reception with the maximum power within the operating range so that communication can be performed at all places within the operating range where wireless communication is possible. The transmission power is set to a fixed value based on the location where it must be.
【0004】このため,小電力で通信可能な場所でも不
必要な過大な電力の電波を送出して電力を不必要に消耗
し,特に電池で電力の供給をしている無線端末装置にあ
っては,不必要な電力の消耗により電池の消耗を促進
し,実際に無線端末を使用する稼働時間を減少させ,渉
外営業用の無線端末装置などでは多大の機会損失を招い
ているという欠点がある。Therefore, even in a place where communication is possible with a small amount of power, unnecessary electric power radio waves are transmitted to unnecessarily consume electric power, and particularly in a wireless terminal device that supplies electric power with a battery. Has the drawback that it accelerates battery consumption due to unnecessary power consumption, reduces the operating time when the wireless terminal is actually used, and causes a great deal of opportunity loss for wireless terminal devices for public relations sales. ..
【0005】さらに,稼働時間を延伸すべく送信電力を
単純に小さくして運用した場合には遠隔地においての無
線通信が正常に確保できないことがしばしば発生すると
いう欠点がある。Further, when the transmission power is simply reduced to operate in order to extend the operating time, there is a drawback that wireless communication in a remote place cannot be normally ensured.
【0006】本発明の目的は上述した欠点を除去し,送
信電力を固定とせず,過大,過小を抑圧した必要かつ最
小限の適正電力として無線端末装置の稼働時間を延伸
し,かつ送受信の信頼性も確保するように運用しうる無
線送信電力制御方式を提供することにある。The object of the present invention is to eliminate the above-mentioned drawbacks, to extend the operating time of the wireless terminal device as the necessary and minimum proper power without suppressing the transmission power, by suppressing the excess and the excess, and the reliability of transmission and reception. It is to provide a wireless transmission power control method that can be operated so as to ensure the security.
【0007】[0007]
【課題を解決するための手段】本発明の構成は,無線通
信センタ装置の総括のもとに無線通信を行なう無線端末
装置の送信電力を制御する無線送信電力制御方式であっ
て,無線通信を行なう相手局から送信される一定電力の
電波を受信し,その受信レベルにもとづいて自局の送信
電力レベルを自動的に圧縮または増大し,無線通信の確
保に必要かつ最小限の適正レベルに制御するか,もしく
は自局の送出する無線電波のS/N比を求め,自局の送
信電波の出力が無線通信の確保に必要かつ最小限の適正
レベルとなる一定のS/N比を保持するように自局の送
信電力を制御する手段を備えて構成される。The structure of the present invention is a wireless transmission power control system for controlling the transmission power of a wireless terminal device that performs wireless communication under the general control of a wireless communication center device. Receives radio waves of constant power transmitted from the partner station, and automatically compresses or increases the transmission power level of its own station based on the reception level, and controls to the minimum appropriate level necessary for ensuring wireless communication. Or, obtain the S / N ratio of the radio wave transmitted by the local station, and maintain a constant S / N ratio at which the output of the radio wave transmitted by the local station becomes the minimum appropriate level necessary for ensuring wireless communication. Thus, it is configured to include means for controlling the transmission power of its own station.
【0008】また本発明の方式は,無線通信センタ装置
の総括のもとに無線通信を行なう無線端末装置の送信電
力を制御する無線送信電力制御方式であって,自局の送
信データが相手局に正確に受信されたか否かを相手局か
らの通報により把握し,送信誤りが検出されてない場合
には相手局との無線通信を確保しうる低電力で送出し,
送信誤りが検知されていることを確認した場合には相手
局との無線通信を確保しうる高電力で送出するように自
動的に送信電力を制御する手段を備えて構成される。Further, the system of the present invention is a wireless transmission power control system for controlling the transmission power of a wireless terminal device that performs wireless communication under the general control of a wireless communication center device, and the transmission data of the local station is the partner station. Whether or not it was correctly received is notified by the notification from the partner station, and if no transmission error is detected, it is transmitted with low power that can ensure wireless communication with the partner station,
When it is confirmed that a transmission error is detected, it is provided with a means for automatically controlling the transmission power so as to transmit at a high power that can ensure wireless communication with the partner station.
【0009】さらに本発明の方式は,無線通信センタ装
置の総括のもとに無線通信を行なう無線端末装置の送信
電力を制御する無線送信電力制御方式であって,自局と
相手局の距離を計測し,相手局との距離の大小にもとづ
いて自動的に送信電力を無線通信の確保に必要かつ最小
限の適正レベルに制御する手段を備えて構成される。Further, the system of the present invention is a wireless transmission power control system for controlling the transmission power of a wireless terminal device which performs wireless communication under the generalization of a wireless communication center device, and determines the distance between the own station and the partner station. It is equipped with a means for measuring and automatically controlling the transmission power to the minimum appropriate level necessary for ensuring wireless communication based on the size of the distance from the partner station.
【0010】[0010]
【実施例】次に,本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【0011】図1は,本発明の第一の実施例の無線端末
装置の主要構成を示すブロック図である。FIG. 1 is a block diagram showing the main configuration of the wireless terminal device according to the first embodiment of the present invention.
【0012】図1に示す第一の実施例の無線端末装置
は,送受兼用のアンテナ1と,アンテナ1による受信電
波のレベルを測定する受信電波レベル測定部2と,無線
電波を送信する無線電波送信部3と,電池電源4と,送
受信切替器5とを備えて成る。The wireless terminal device of the first embodiment shown in FIG. 1 comprises an antenna 1 for both transmission and reception, a reception radio wave level measuring unit 2 for measuring the level of the radio wave received by the antenna 1, and a radio radio wave for transmitting radio waves. The transmitter 3 includes a battery power source 4 and a transmission / reception switch 5.
【0013】実際の無線端末装置は上述した構成要素の
他に,受信処理系や表示系ならびに操作系等の通常装備
回路を含むが,図1では説明の便を図ってこれら通常装
備回路の記載は省略する。In addition to the above-mentioned components, the actual wireless terminal device includes ordinary equipment circuits such as a reception processing system, a display system, and an operation system. In FIG. 1, these ordinary equipment circuits are described for convenience of explanation. Is omitted.
【0014】次に,図1の実施例の動作について説明す
る。Next, the operation of the embodiment shown in FIG. 1 will be described.
【0015】図1を参照するに,受信電波101がアン
テナ1に受信され,受信信号103となって受信電波レ
ベル測定部2に入力される。Referring to FIG. 1, the received radio wave 101 is received by the antenna 1, becomes a received signal 103, and is input to the received radio wave level measuring unit 2.
【0016】受信電波レベル測定部2は,通信相手先で
使用している周波数の信号について入力レベルを測定す
る。受信電波101のレベルを測定した測定結果は,受
信レベル信号201として出力され,無線電波送信部3
に提供される。The reception radio wave level measuring unit 2 measures the input level of the signal of the frequency used by the communication partner. The measurement result of measuring the level of the received radio wave 101 is output as the reception level signal 201, and the radio wave transmission unit 3
Provided to.
【0017】無線電波送信部3は,受信レベル信号20
1により送信電力を調整し,出力信号301を出力す
る。The radio wave transmitter 3 receives the reception level signal 20.
The transmission power is adjusted by 1 and the output signal 301 is output.
【0018】出力信号301は,アンテナ1から送信電
波102となって出力される。なお,受信電波レベル測
定部2と無線電波送信部3の電力は,電池電源4から供
給される。The output signal 301 is output from the antenna 1 as a transmission radio wave 102. The electric power of the received radio wave level measurement unit 2 and the radio wave transmission unit 3 is supplied from the battery power source 4.
【0019】次に,図2および図3の併せ参照しつつ,
第一の実施例の動作について,さらに詳述する。Next, referring to the combination of FIG. 2 and FIG.
The operation of the first embodiment will be described in more detail.
【0020】図2に示す如く,無線通信センタ装置71
から常に一定の電力で電波がアンテナ1から送信され,
受信電波101として無線端末装置(1)6aと無線端
末装置(2)6bに受信される。As shown in FIG. 2, the wireless communication center device 71
Radio waves are always transmitted from the antenna 1 from the antenna 1,
The received radio wave 101 is received by the wireless terminal device (1) 6a and the wireless terminal device (2) 6b.
【0021】受信電波101は,アンテナ1で捕捉さ
れ,受信信号103として受信電波レベル測定部2に入
力される。The received radio wave 101 is captured by the antenna 1 and input to the received radio wave level measuring section 2 as a received signal 103.
【0022】無線端末装置(1)6aでは,受信電波レ
ベル測定部2の受信電波レベルの測定値が,図3の特性
図で示す点P,また無線端末装置(2)6bでは点Qで
あるとする。これら測定値はいずれも,それぞれの無線
端末装置の無線電波送信部3に供給され,無線端末装置
6aは図3のP点,無線端末装置6bは図3のQ点の示
す送信電力を送出する。In the wireless terminal device (1) 6a, the measured value of the received electromagnetic wave level of the received electromagnetic wave level measuring unit 2 is point P shown in the characteristic diagram of FIG. 3, and in the wireless terminal device (2) 6b, the point Q. And All of these measured values are supplied to the radio wave transmission unit 3 of each wireless terminal device, and the wireless terminal device 6a sends out the transmission power indicated by point P in FIG. 3 and the wireless terminal device 6b sends out the transmission power indicated by point Q in FIG. ..
【0023】このように,第一の実施例では受信電波レ
ベルに対応して過,不足を排除した適正な送信電力が送
出される。なお,図3に示す特性は,無線端末装置の性
能,運用環境の特異性等を勘案し,あらかじめ適正レベ
ルを得るように設定される。As described above, in the first embodiment, appropriate transmission power is sent out with excess and deficiency eliminated according to the received radio wave level. The characteristics shown in FIG. 3 are set in advance so as to obtain an appropriate level in consideration of the performance of the wireless terminal device, the peculiarity of the operating environment, and the like.
【0024】図4は,本発明の第二の実施例の無線端末
装置の主要構成を示すブロック図である。FIG. 4 is a block diagram showing the main configuration of the wireless terminal device according to the second embodiment of the present invention.
【0025】この第二の実施例では,前述した第一の実
施例が受信電波レベルにもとづいて送信電力レベルを制
御するのに対し,自局の送出する無線電波のS/N比に
もとづいて送信電力レベルを制御することを特徴とす
る。In the second embodiment, while the transmission power level is controlled based on the received radio wave level in the first embodiment described above, the transmission power level is controlled based on the S / N ratio of the radio wave transmitted from the own station. It is characterized by controlling the transmission power level.
【0026】図4に示す実施例は,自局の送出する無線
電波のS/N比を測定するS/N比測定部8と,S/N
比測定部8の測定結果にもとづいて送信電力を制御する
無線電波送信部9とを備えて成り、無線端末装置が通常
有するその他の構成要素については,図1の場合と同様
に,その記載は省略する。The embodiment shown in FIG. 4 has an S / N ratio measuring section 8 for measuring the S / N ratio of a radio wave transmitted from its own station, and an S / N ratio.
A radio wave transmitting unit 9 for controlling the transmission power based on the measurement result of the ratio measuring unit 8 is provided, and the description of other components that the wireless terminal device normally has is the same as in the case of FIG. Omit it.
【0027】次に,図4による第二の実施例の動作につ
いて説明する。Next, the operation of the second embodiment shown in FIG. 4 will be described.
【0028】図4を参照するに,無線電波送信部9の出
力はアンテナ1を用いて送信電波901として送信さ
れ,これを自局の有する他のアンテナ1aで受信し,そ
の受信信号801をS/N比測定部8でS/N比を測定
し,一定のS/N比で無線電波送信部9が送信すること
ができるように送信電力を制御するための過不足信号が
無線電波送信部9に提供されることを基本的特徴とす
る。Referring to FIG. 4, the output of the radio wave transmission unit 9 is transmitted as a transmission radio wave 901 by using the antenna 1, is received by another antenna 1a of the own station, and the received signal 801 is S. An S / N ratio is measured by the A / N ratio measuring unit 8 and an excess / deficiency signal for controlling the transmission power so that the radio electric wave transmitting unit 9 can transmit at a constant S / N ratio is a radio electric wave transmitting unit. 9 is provided as a basic feature.
【0029】次に,図5を併用しつつ,図4の実施例の
動作をさらに詳述する。Next, the operation of the embodiment shown in FIG. 4 will be described in more detail with reference to FIG.
【0030】無線電波送信部9が送信動作をしていない
ときに受信される暗騒音信号を,S/N比測定部8で測
定する場合の受信電波を図5(a)に示す。FIG. 5 (a) shows the received radio waves when the S / N ratio measuring section 8 measures the background noise signal received when the radio wave transmitting section 9 is not transmitting.
【0031】図5において,fは無線電波送信部9で使
用する周波数を示し,Aはその周波数での暗騒音の受信
電力を示す。In FIG. 5, f indicates the frequency used in the radio wave transmitter 9, and A indicates the received power of background noise at that frequency.
【0032】つぎに,無線電波送信部9が送信動作をし
ているときに受信される電波をS/N比測定部8で測定
する場合の受信電波を図5(b)に示す。図5(a)に
対応する周波数fでの信号の受信電力はBである,この
AとBの値でS/N比を演算し,一定のS/N比で信号
を送出できるように送信電力の過不足信号を無線電波送
信部9に供給する。Next, FIG. 5B shows received radio waves when the S / N ratio measuring section 8 measures the radio waves received while the radio wave transmitting section 9 is transmitting. The received power of the signal at the frequency f corresponding to FIG. 5 (a) is B. The S / N ratio is calculated by the values of A and B, and the signal is transmitted so that the signal can be transmitted at a constant S / N ratio. An electric power excess / deficiency signal is supplied to the radio wave transmitter 9.
【0033】送信電力が大きすぎるという過不足信号が
伝えられた時は,無線電波送信部9は送信電力を下げ,
送信電力が小さすぎるという過不足信号が伝えられた時
は無線電波送信部9は送信電力を上げる。When an excess / deficiency signal indicating that the transmission power is too large is transmitted, the radio wave transmitter 9 lowers the transmission power,
When an excess / deficiency signal indicating that the transmission power is too low is transmitted, the radio wave transmission unit 9 increases the transmission power.
【0034】このようにして,送信レベルを適正レベル
とする一定のS/N比を保持し,過,不足のない適正レ
ベルの送信電力の制御が行なわれる。In this way, a constant S / N ratio that keeps the transmission level at an appropriate level is maintained, and transmission power is controlled at an appropriate level without excess or deficiency.
【0035】図6は,本発明の第三の実施例の構成を示
すブロック図である。FIG. 6 is a block diagram showing the configuration of the third embodiment of the present invention.
【0036】図6に示す第三の実施例は,自局の送信デ
ータの相手局における誤り検出情報にもとづいて自局の
送信電力の過大,過小を制御することを基本的特徴とす
るもので,その構成は次のとおりである。The third embodiment shown in FIG. 6 is basically characterized in that the transmission power of the own station is controlled based on the error detection information of the transmission data of the own station to be excessive or excessive. , The structure is as follows.
【0037】すなわち,図6に示す第三の実施例では,
無線端末装置10は,受信した無線通信センタ装置7か
らの送信データの誤り検出を行なう送信誤り検出部11
と,無線電波送信部12とを備えて成る。なお,無線端
末装置の有する,通常の他の構成要素についての記載
は,第一および第二の実施例と同様に省略する。That is, in the third embodiment shown in FIG.
The wireless terminal device 10 includes a transmission error detection unit 11 that detects an error in the received transmission data from the wireless communication center device 7.
And a radio wave transmission unit 12. Note that the description of other ordinary constituent elements of the wireless terminal device will be omitted as in the first and second embodiments.
【0038】次に,第三の実施例の動作について説明す
る。Next, the operation of the third embodiment will be described.
【0039】図6を参照するに,無線通信センタ装置7
と,無線端末装置10とは相互に通信を行い無線通信セ
ンタ装置7の出力は送信電波701として無線端末装置
10の送信誤り検出部11に入力され,無線通信センタ
装置7からの電文を復調する。そのとき復調されたデー
タが,送信データの再送を指定する再送要求であれば,
送信電力を大として無線通信センタ装置7の受信誤りを
排除するような送信電力制御信号を無線電波送信部12
に送出し,これを受けた無線電波送信部12は送信電力
を大とするように制御して送出する。Referring to FIG. 6, the wireless communication center device 7
And the wireless terminal device 10 communicate with each other, and the output of the wireless communication center device 7 is input to the transmission error detection unit 11 of the wireless terminal device 10 as a transmission radio wave 701 to demodulate a telegram from the wireless communication center device 7. .. If the demodulated data at that time is a resend request that specifies resending of the transmitted data,
The radio wave transmission unit 12 transmits a transmission power control signal for increasing the transmission power and eliminating the reception error of the wireless communication center device 7.
Then, the radio wave transmitting unit 12 receiving the control signal controls to increase the transmission power and transmits the signal.
【0040】次に,図7を併用して,第三の実施例の動
作をさらに詳述する。Next, the operation of the third embodiment will be described in more detail with reference to FIG.
【0041】無線電波送信部12における送信電力は,
初期値では低電力に設定されている。The transmission power in the radio wave transmitter 12 is
The initial value is set to low power.
【0042】無線端末装置10は,無線電波送信部12
から送信電波1201で図7に示す電文1を無線通信セ
ンタ装置7へ送信する。無線通信センタ装置7は,送信
電波701で正常に受信できたことを示す正常応答を無
線端末装置10に伝える。The radio terminal device 10 includes a radio wave transmission unit 12
7 transmits the message 1 shown in FIG. The wireless communication center device 7 transmits to the wireless terminal device 10 a normal response indicating that the transmission radio wave 701 has been normally received.
【0043】送信誤り検出部11は,正常応答というデ
ータを復調し,無線電波送信部12へ送信電力が適正で
あることをつたえる。The transmission error detection unit 11 demodulates the normal response data and informs the radio wave transmission unit 12 that the transmission power is appropriate.
【0044】無線電波送信部12は,送信電力をそのま
まの状態で保つ。The radio wave transmitter 12 keeps the transmission power as it is.
【0045】また,つぎに,無線端末装置10は,無線
電波送信部12から,送信電波1201で電文2を無線
通信センタ装置7へ送信する。Next, the radio terminal unit 10 transmits the telegram 2 to the radio communication center unit 7 from the radio wave transmitting unit 12 with the transmission radio wave 1201.
【0046】無線通信センタ装置7は,正常に受信でき
なかった場合には,これを再送要求で無線端末装置10
に伝える。送信誤り検出部11は,再送要求というデー
タを復調し,無線電波送信部12へ送信電力が不足して
いることをつたえる。If the wireless communication center device 7 cannot receive the data normally, the wireless communication center device 7 requests the wireless terminal device 10 to resend the data.
Tell. The transmission error detection unit 11 demodulates the data of the retransmission request, and informs the radio wave transmission unit 12 that the transmission power is insufficient.
【0047】無線電波送信部12は,送信電力を大きく
して再び電文2を送出する。The radio wave transmission unit 12 increases the transmission power and sends the telegram 2 again.
【0048】このようにして,送信データの相手局にお
ける受信状態の良否にもとづいて,送信電力を適正レベ
ルに制御し,過不足ない適正レベルの送信電力での無線
通信確保が可能となる。In this way, it is possible to control the transmission power to an appropriate level based on the quality of the reception state of the transmission data at the partner station, and to secure the wireless communication with the appropriate level of transmission power that is sufficient.
【0049】図8は,本発明の第四の実施例の構成を示
すブロック図である。FIG. 8 is a block diagram showing the configuration of the fourth embodiment of the present invention.
【0050】図8に示す第四の実施例の無線端末装置
は,交信相手局との距離を検知する距離検知部13と,
距離検知部13の出力する送信電力制御信号によって送
出電力レベルを制御される無線電波出力部14とを備え
て成る。The wireless terminal device of the fourth embodiment shown in FIG. 8 includes a distance detecting section 13 for detecting the distance to the communication partner station,
The radio wave output unit 14 has a transmission power level controlled by a transmission power control signal output from the distance detection unit 13.
【0051】なお,図8では,無線端末装置が有する通
常の構成要素の記載は,第一の実施例乃至第三の実施例
同様に省略している。It should be noted that, in FIG. 8, the description of the ordinary constituent elements of the wireless terminal device is omitted as in the first to third embodiments.
【0052】この第四の実施例では,自局の存在する場
所と,通信相手局が存在する場所との距離を知り,この
距離の大小に応じて自動的に送信電力を制御して適正レ
ベルとするものである。In the fourth embodiment, the distance between the place where the own station exists and the place where the communication partner station exists is known, and the transmission power is automatically controlled according to the size of this distance to obtain an appropriate level. It is what
【0053】次に,図9および図10を併用しつつ,本
実施例の動作について説明する。Next, the operation of this embodiment will be described with reference to FIGS. 9 and 10.
【0054】ここで,図10に示す無線端末装置(1)
6aが無線通信センタ装置7と無線通信を行なう場合を
例とする。Here, the wireless terminal device (1) shown in FIG.
The case where 6a performs wireless communication with the wireless communication center device 7 is taken as an example.
【0055】無線通信センタ装置7から,図9に示す時
刻情報Aをアンテナ71から無線端末装置(1)6aに
送出・通知する。一方,時刻情報送信局15からは図9
に示す時刻情報Bをアンテナ151から時刻情報Aと同
時に無線端末装置(1)6aに送出・通知する。The wireless communication center device 7 sends / notifies the time information A shown in FIG. 9 from the antenna 71 to the wireless terminal device (1) 6a. On the other hand, from the time information transmitting station 15, FIG.
At the same time as the time information A from the antenna 151, the time information B shown in is transmitted and notified to the wireless terminal device (1) 6a.
【0056】無線端末装置(1)6aは,距離検知部1
3によって,時刻情報Aと時刻情報Bの受信時間差Tを
求め,この受信時間差Tから無線通信センタ装置7との
距離を計算し,距離が短い場合は小電力で,距離が長い
場合は大電力で送出するように制御する送信電力制御信
号を無線電波出力部14に送出する。こうして,交信相
手局との距離にもとづく送信電力レベルの自動制御が可
能となる。The wireless terminal device (1) 6a includes the distance detecting unit 1
3 obtains the reception time difference T between the time information A and the time information B, and calculates the distance to the wireless communication center device 7 from this reception time difference T. Small power is used when the distance is short, and high power is used when the distance is long. Then, a transmission power control signal for controlling to be transmitted in step 1 is transmitted to the radio wave output unit 14. In this way, it becomes possible to automatically control the transmission power level based on the distance from the communicating station.
【0057】なお,上述した第一乃至第四の実施例は,
それぞれ単独に適用した四つの実施例として示したが,
これらの機能は,適宜組合せて各無線端末装置に備える
ことも容易に実施しうることは明らかである。The first to fourth embodiments described above are
Although shown as four examples applied to each independently,
It is obvious that these functions can be easily implemented by appropriately combining them into each wireless terminal device.
【0058】[0058]
【発明の効果】以上説明したように,受信レベル,S/
N比,交信相手局の受信状態および距離に応じて送信電
力レベルを通信相手が受信できる適正な値に自動的に調
整することにより,適正レベルの必要最低限の電力で無
線通信を実現することができ,電池で電力を供給する無
線端末装置においては,通信の信頼性を向上し,不必要
な電池の消耗を防ぐことができる効果がある。As described above, the reception level, S /
Achieve wireless communication with the minimum required power at an appropriate level by automatically adjusting the transmission power level to an appropriate value that can be received by the communication partner, depending on the N ratio, reception status of the communication partner station, and distance. In a wireless terminal device that supplies power with a battery, it is possible to improve communication reliability and prevent unnecessary battery consumption.
【0059】また,常に,過大,過小のない適正な送信
電力で送信をするため,送受信の信頼性を向上すること
ができる効果がある。Further, since transmission is always performed with proper transmission power that is neither excessive nor excessive, there is an effect that the reliability of transmission and reception can be improved.
【図1】本発明の第一の実施例の無線端末装置の主要構
成を示すブロック図である。FIG. 1 is a block diagram showing a main configuration of a wireless terminal device according to a first embodiment of the present invention.
【図2】図1の実施例の運用状態の一例を示す図であ
る。FIG. 2 is a diagram showing an example of an operating state of the embodiment of FIG.
【図3】図1の実施例における送受信レベルの一例を示
す送受信レベル特性図である。FIG. 3 is a transmission / reception level characteristic diagram showing an example of transmission / reception levels in the embodiment of FIG.
【図4】本発明の第二の実施例の無線端末装置の主要構
成を示すブロック図である。FIG. 4 is a block diagram showing a main configuration of a wireless terminal device according to a second embodiment of the present invention.
【図5】図4の実施例における受信電波電力の一例を示
す周波数特性図である。5 is a frequency characteristic diagram showing an example of received radio wave power in the embodiment of FIG.
【図6】本発明の第三の実施例の無線端末装置の主要構
成を示すブロック図である。FIG. 6 is a block diagram showing a main configuration of a wireless terminal device according to a third embodiment of the present invention.
【図7】図6の実施例における送信電波の送出および応
答電波の送出の一例を示す図である。FIG. 7 is a diagram showing an example of transmission of transmission radio waves and transmission of response radio waves in the embodiment of FIG.
【図8】本発明の第四の実施例におけるシステム構成を
示すブロック図である。FIG. 8 is a block diagram showing a system configuration in a fourth embodiment of the present invention.
【図9】図8の実施例における受信時刻情報の一例を示
す図である。9 is a diagram showing an example of reception time information in the embodiment of FIG.
【図10】図8の実施例の運用状態の一例を示す図であ
る。FIG. 10 is a diagram showing an example of an operating state of the embodiment of FIG.
1,1a アンテナ 2 受信電波レベル測定部 3 無線電波送信部 4 電池電源 5 送受切替器 6a 無線端末装置(1) 6b 無線端末装置(2) 7 無線通信センタ装置 8 S/N比測定部 9 無線電波送信部 10 無線端末装置 11 送信誤り検出部 12 無線電波送信部 13 距離検知部 14 無線電波出力部 15 時間情報送信局 1, 1a Antenna 2 Received radio wave level measurement unit 3 Radio wave transmission unit 4 Battery power supply 5 Transmission / reception switch 6a Radio terminal device (1) 6b Radio terminal device (2) 7 Radio communication center device 8 S / N ratio measurement unit 9 Radio Radio wave transmitter 10 Wireless terminal device 11 Transmission error detector 12 Radio wave transmitter 13 Distance detector 14 Radio wave output unit 15 Time information transmitter
Claims (3)
通信を行なう無線端末装置の送信電力を制御する無線送
信電力制御方式であって,無線通信を行なう相手局から
送信される一定電力の電波を受信し,その受信レベルに
もとづいて自局の送信電力レベルを自動的に圧縮または
増大し,無線通信の確保に必要かつ最小限の適正レベル
に制御するか,もしくは自局の送出する無線電波のS/
N比を求め,自局の送信電波の出力が無線通信の確保に
必要かつ最小限の適正レベルとなる一定のS/N比を保
持するように自局の送信電力を制御する手段を備えて成
ることを特徴とする無線送信電力制御方式。1. A wireless transmission power control method for controlling the transmission power of a wireless terminal device that performs wireless communication under the general control of a wireless communication center device, wherein a fixed power transmitted from a partner station that performs wireless communication is controlled. Receives radio waves and automatically compresses or increases the transmission power level of its own station based on the reception level to control to the minimum appropriate level necessary for ensuring wireless communication, or to transmit radio waves of its own station. Radio wave S /
A means is provided for controlling the transmission power of the own station so as to obtain the N ratio and maintain a constant S / N ratio at which the output of the transmission radio wave of the own station becomes the minimum appropriate level necessary for ensuring wireless communication. A wireless transmission power control method characterized by comprising:
通信を行なう無線端末装置の送信電力を制御する無線送
信電力制御方式であって,自局の送信データが相手局に
正確に受信されたか否かを相手局からの通報により把握
し,送信誤りが検出されてない場合には相手局との無線
通信を確保しうる低電力で送出し,送信誤りが検知され
ていることを確認した場合には相手局との無線通信を確
保しうる高電力で送出するように自動的に送信電力を制
御する手段を備えて成ることを特徴とする無線送信電力
制御方式。2. A wireless transmission power control method for controlling transmission power of a wireless terminal device performing wireless communication under the general control of a wireless communication center device, wherein transmission data of a local station is accurately received by a partner station. Whether or not there was a transmission error was detected, and if no transmission error was detected, it was sent with low power that could ensure wireless communication with the other station, and it was confirmed that a transmission error was detected. In this case, the wireless transmission power control method is provided with means for automatically controlling the transmission power so as to transmit at a high power that can ensure wireless communication with the partner station.
通信を行なう無線端末装置の送信電力を制御する無線送
信電力制御方式であって,自局と相手局の距離を計測
し,相手局との距離の大小にもとづいて自動的に送信電
力を無線通信の確保に必要かつ最小限の適正レベルに制
御する手段を備えて成ることを特徴とする無線送信電力
制御方式。3. A wireless transmission power control method for controlling the transmission power of a wireless terminal device that performs wireless communication under the general control of a wireless communication center device, wherein the distance between the own station and the other station is measured and the other station is measured. A wireless transmission power control method comprising means for automatically controlling the transmission power to a minimum appropriate level necessary for ensuring wireless communication based on the size of the distance from
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03318786A JP3101834B2 (en) | 1991-12-03 | 1991-12-03 | Wireless transmission power control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP03318786A JP3101834B2 (en) | 1991-12-03 | 1991-12-03 | Wireless transmission power control method |
Publications (2)
Publication Number | Publication Date |
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JPH05160777A true JPH05160777A (en) | 1993-06-25 |
JP3101834B2 JP3101834B2 (en) | 2000-10-23 |
Family
ID=18102929
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JP03318786A Expired - Lifetime JP3101834B2 (en) | 1991-12-03 | 1991-12-03 | Wireless transmission power control method |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001099328A1 (en) * | 2000-06-23 | 2001-12-27 | Matsushita Electric Industrial Co., Ltd. | Data transmission apparatus and data transmission method |
JP2006345581A (en) * | 1995-12-29 | 2006-12-21 | At & T Corp | System and method for management of neighbor-channel interference with power control and directed channel assignment |
JP2007281804A (en) * | 2006-04-05 | 2007-10-25 | Canon Inc | Transmission power control system and program |
JP2008288954A (en) * | 2007-05-18 | 2008-11-27 | Nec Access Technica Ltd | Radio communication apparatus |
-
1991
- 1991-12-03 JP JP03318786A patent/JP3101834B2/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006345581A (en) * | 1995-12-29 | 2006-12-21 | At & T Corp | System and method for management of neighbor-channel interference with power control and directed channel assignment |
JP4589287B2 (en) * | 1995-12-29 | 2010-12-01 | エイ・ティ・アンド・ティ・コーポレーション | System and method for managing adjacent channel interference using power control and directed channel assignment together |
WO2001099328A1 (en) * | 2000-06-23 | 2001-12-27 | Matsushita Electric Industrial Co., Ltd. | Data transmission apparatus and data transmission method |
US6931077B2 (en) | 2000-06-23 | 2005-08-16 | Matsushita Electric Industrial Co., Ltd. | Data transmitting apparatus and data transmitting method |
JP2007281804A (en) * | 2006-04-05 | 2007-10-25 | Canon Inc | Transmission power control system and program |
JP4709056B2 (en) * | 2006-04-05 | 2011-06-22 | キヤノン株式会社 | Transmission power control system and program |
JP2008288954A (en) * | 2007-05-18 | 2008-11-27 | Nec Access Technica Ltd | Radio communication apparatus |
Also Published As
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JP3101834B2 (en) | 2000-10-23 |
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