JPS609230A - Control system for transmission power - Google Patents
Control system for transmission powerInfo
- Publication number
- JPS609230A JPS609230A JP11522183A JP11522183A JPS609230A JP S609230 A JPS609230 A JP S609230A JP 11522183 A JP11522183 A JP 11522183A JP 11522183 A JP11522183 A JP 11522183A JP S609230 A JPS609230 A JP S609230A
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- value
- fading
- circuit
- received power
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、フェージングの影響を受ける無線回線におい
て受信電力値に基づいて送信側の送信電力値を制御する
送信電力制御方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission power control method for controlling a transmission power value on a transmitting side based on a received power value in a radio line that is affected by fading.
従来この種の送信電力制御方式は、受信側において時間
率５０％受信電力値を検出し、この値とあらかじめ設定
した受信電力のしきい値とを比較し、しきい値をこえた
回数を送信電力制御の判定基準としていた。従って、従
来装置は、送信電力制御を実行するまでに時間を要し、
また、激しいフェージング変動の状態が定量的に把握で
きない等の理由により、急激なフェージング変動に対し
ては、送信電力制御が追従できないという欠点がある。Conventionally, this type of transmission power control method detects the 50% reception power value on the receiving side, compares this value with a preset reception power threshold, and calculates the number of times the threshold is exceeded. This was used as a criterion for power control. Therefore, the conventional device takes time to perform transmission power control,
Furthermore, there is a drawback that transmission power control cannot follow rapid fading fluctuations, for example because the state of severe fading fluctuations cannot be quantitatively grasped.
本発明の目的は、上述の従来の欠点を解決し、急激なフ
ェージング変動に対しても、送信電力が追従できるよう
にした送信電力制御方式を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission power control method that solves the above-mentioned conventional drawbacks and allows transmission power to follow even rapid fading fluctuations.
本発明の送信電力制御方式は、時間率５０％の受信電力
値を検出する時間率５０％受信電力値検出回路と、該時
間率５０％受信電力値検出回路の出力とあらかじめ設定
したしきい値とを比較して送信電力制御の実行を判定す
る送信電力制御判定回路とを備えて、受信電力に応じて
送信電力を制御する送信電力制御方式において、フェー
ジングデプス値検出回路と、あらかじめ定めたフェージ
ングデプス値が設定されたフェージングデプスしきい値
設定回路とを備えて、前記送信電力制御判定回路は、前
記時間率５０％受信電力値検出回路の出力と前記フェー
ジングデプス値検出回路の出力によって、時間率５０％
受信電力値があらかじめ定めたしきい値になったときの
フェージングデプス値が前記フェージングデプスしきい
値設定回路に設定されたしきい値より大であるときに送
信電力を増加させる制御信号を出力することを特徴とす
る。The transmission power control method of the present invention includes a 50% time rate received power value detection circuit that detects a 50% time rate received power value, an output of the 50% time rate received power value detection circuit, and a preset threshold value. In a transmission power control method that controls transmission power according to received power, the transmission power control method includes a transmission power control determination circuit that determines whether to perform transmission power control by comparing the a fading depth threshold setting circuit in which a depth value is set; rate 50%
Outputting a control signal to increase the transmission power when the fading depth value when the received power value reaches a predetermined threshold value is greater than the threshold value set in the fading depth threshold setting circuit. It is characterized by
次に、本発明について、図面を参照して、詳細に説明す
る。Next, the present invention will be described in detail with reference to the drawings.
図は、本発明の一実施例を示すブロック図である。すな
わち、送信装置３から送信された電波が受信装置４で受
信され、受信装置４は受信電力に応じたＡＧＣ電圧１２
を出力する。受信電力値変換回路５は、ＡＧＣ電圧１２
を入力すると、この時の受信装置４が受信した電力値を
出力して時間率５０％受信電力値検出回路６および時間
率９９％受信電力値検出回路７に供給する。時間率５０
％受信電力値検出回路６は、受信電力値変換回路５から
出力される時々変化する受信電力値から一定時間ごとの
時間率５０％に対応する受信電力値を検出して、時間率
５０％受信電力値１５をフェージングデプス値検出回路
８および送信電力制御判定回路１１に送る。一方、時間
率９９％受信電力値検出回路７は、受信電力の時間率９
９％に対応する受信電力値を検出してフェージングデプ
ス値検出回路８に送る。フェージングデプス値検出回路
８は、時間率５０％受信電力値検出回路６および時間率
９９％受信電力値検出回路７の出力する受信電力値の差
を検出する回路であり、該回路から出力されるフェージ
ングデプス値１３は、その測定時間におけるフェージン
グの深さを示す。The figure is a block diagram showing one embodiment of the present invention. That is, the radio waves transmitted from the transmitting device 3 are received by the receiving device 4, and the receiving device 4 adjusts the AGC voltage 12 according to the received power.
Output. The received power value conversion circuit 5 converts the AGC voltage 12
When input, the receiving device 4 at this time outputs the received power value and supplies it to the 50% time rate received power value detection circuit 6 and the 99% time rate received power value detection circuit 7. time rate 50
The % received power value detection circuit 6 detects a received power value corresponding to a 50% time rate for each fixed time from the occasionally changing received power value output from the received power value conversion circuit 5, and detects a received power value corresponding to a 50% time rate. The power value 15 is sent to the fading depth value detection circuit 8 and the transmission power control determination circuit 11. On the other hand, the time rate 99% received power value detection circuit 7 detects that the time rate of the received power is 99%.
The received power value corresponding to 9% is detected and sent to the fading depth value detection circuit 8. The fading depth value detection circuit 8 is a circuit that detects the difference between the received power values output from the 50% time rate received power value detection circuit 6 and the 99% time rate received power value detection circuit 7, and is output from the circuit. The fading depth value 13 indicates the depth of fading at that measurement time.
フェージングデプスしきい値設定回路９には、あらかじ
めフェージングデプスのしきい値が設定され、また、時
間率５０％受信電力しきい値設定回路ｌＯには、時間率
５０％受信電力のしきい値が設定されている。送信電力
制御判定回路１１は、時間率５０％受信電力値、１５が
、時間率５．０％受信電力しきい値１６より劣化した状
態である時、フェージングデプス値１３と、そのしきい
値工４とを比較して送信電力制御の実行を判定し、送信
電力を増加させる必要のあるときは、送信電力制御回路
２に対して送信電力制御信号１７を出力する。これによ
り、送信電力制御回路２は、送信装置３の送信電力を増
加させるように制御する。本実施例では、送信電力制御
の判定時間が短縮され、急激なフェージングに対しても
、迅速に応答することができると同時に、短時間に生じ
るフェージングの深さが定量的に把握できるという効果
がある。The fading depth threshold setting circuit 9 has a fading depth threshold set in advance, and the 50% time rate received power threshold setting circuit 10 has a 50% time rate received power threshold. It is set. The transmission power control determination circuit 11 determines the fading depth value 13 and its threshold value when the received power value 15 at a time rate of 50% is in a state degraded from the received power threshold value 16 at a time rate of 5.0%. 4 to determine whether to perform transmission power control, and if it is necessary to increase the transmission power, outputs a transmission power control signal 17 to the transmission power control circuit 2. Thereby, the transmission power control circuit 2 controls the transmission power of the transmitter 3 to increase. This embodiment has the advantage that the determination time for transmit power control is shortened, it is possible to quickly respond to sudden fading, and at the same time, the depth of fading that occurs in a short period of time can be quantitatively grasped. be.
以上のように、本発明においては、時間率５０％受信電
力値が、あらかじめ定めた時間率５０％受信電力しきい
値より劣化したときのフェージングデプス値を、あらか
じめ定めたフェージングデプスしきい値と比較すること
によって送信電力制御の必要性を判定するように構成し
たから、送信電力制御の判定時間が短縮され、かつ、短
時間に生じるフェージングの深さが定量的に明確になる
という効果がある。As described above, in the present invention, the fading depth value when the 50% time rate received power value deteriorates below the predetermined 50% time rate received power threshold value is set to the predetermined fading depth threshold value. Since the configuration is configured to determine the necessity of transmit power control through comparison, the time required to determine transmit power control is shortened, and the depth of fading that occurs in a short period of time can be quantitatively clarified. .
図は本発明の一実施例を示すブロック図である。
図において、ｌ：受信電力測定回路、２：送信電力制御
回路、３：送信装置、４：受信装置、５：受信電力値変
換回路、６：時間率５０％受信電力値検出回路、７：時
間率９９％受信電力値検出回路、８：フェージングデプ
ス値検出回路、９：フェージングデプスしきい値設定回
路、ｌＯ：時間率５０％受信電力しきい値設定回路、ｌ
ｌ：送 。
倍電力制御判定回路、１２ ： ＡＧＣ電圧、１３：フ
ェージングデプス値、１４：フェージングデプスしきい
値、１５：時間率５０％受信電力値、１６二時間率５０
％受信電力しきい値、１７：送信電力制御信号。
出願人 日本電気株式会社
代理人 弁理士 住田俊宗The figure is a block diagram showing one embodiment of the present invention. In the figure, l: reception power measurement circuit, 2: transmission power control circuit, 3: transmission device, 4: reception device, 5: reception power value conversion circuit, 6: time rate 50% reception power value detection circuit, 7: time 99% rate reception power value detection circuit, 8: Fading depth value detection circuit, 9: Fading depth threshold setting circuit, lO: 50% time rate reception power threshold setting circuit, l
l: send. Double power control judgment circuit, 12: AGC voltage, 13: Fading depth value, 14: Fading depth threshold, 15: Time rate 50% received power value, 16 Two time rate 50
% reception power threshold, 17: transmission power control signal. Applicant: NEC Corporation Agent: Patent Attorney: Toshimune Sumita
Claims (1)
電力値検出回路と、該時間率５０％受信電力値検出回路
の出力とあらかじめ設定したしきい値とを比較して送信
電力制御の実行を判定する送信電力制御判定回路とを備
えて、受信電力に応じて送信電力を制御する送信電力制
御方式において、フェージングデプス値検出回路と、あ
らかじめ定めたフェージングデプス値が設定されたフェ
ージングデプスしきい値設定回路とを備えて、前記送信
電力制御判定回路は、前記時間率５０％受信電力値検出
回路の出力と前記フェージングデプス値検出回路の出力
によって、時間率５０％受信電力値があらかじめ定めた
しきい値になったときのフェージングデプス値が前記フ
ェージングデプスしきい値設定回路に設定されたしきい
値より大であるときに送信電力を増加させる制御信号を
出力することを特徴とする送信電力制御方式。A 50% time rate received power value detection circuit detects a 50% time rate received power value, and the output of the 50% time rate received power value detection circuit is compared with a preset threshold value to perform transmission power control. In a transmission power control method that includes a transmission power control determination circuit that determines execution and controls transmission power according to received power, a fading depth value detection circuit and a fading depth detection circuit in which a predetermined fading depth value is set. a threshold setting circuit, the transmission power control determination circuit predetermines a 50% time rate received power value based on the output of the 50% time rate received power value detection circuit and the output of the fading depth value detection circuit. The transmission is characterized by outputting a control signal for increasing transmission power when a fading depth value when a threshold value is reached is greater than a threshold value set in the fading depth threshold setting circuit. Power control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11522183A JPS609230A (en) | 1983-06-28 | 1983-06-28 | Control system for transmission power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11522183A JPS609230A (en) | 1983-06-28 | 1983-06-28 | Control system for transmission power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS609230A true JPS609230A (en) | 1985-01-18 |
| JPH026260B2 JPH026260B2 (en) | 1990-02-08 |
Family
ID=14657356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11522183A Granted JPS609230A (en) | 1983-06-28 | 1983-06-28 | Control system for transmission power |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62157427A (en) * | 1985-12-20 | 1987-07-13 | テ アール テ テレコミュニカシオン ラジオエレクトリック エ テレホニク | Transmitted power controller for radio link |
-
1983
- 1983-06-28 JP JP11522183A patent/JPS609230A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62157427A (en) * | 1985-12-20 | 1987-07-13 | テ アール テ テレコミュニカシオン ラジオエレクトリック エ テレホニク | Transmitted power controller for radio link |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH026260B2 (en) | 1990-02-08 |
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