JPH0730482A - Transmission output control device - Google Patents
Transmission output control deviceInfo
- Publication number
- JPH0730482A JPH0730482A JP5192739A JP19273993A JPH0730482A JP H0730482 A JPH0730482 A JP H0730482A JP 5192739 A JP5192739 A JP 5192739A JP 19273993 A JP19273993 A JP 19273993A JP H0730482 A JPH0730482 A JP H0730482A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- transmission power
- error rate
- frame error
- unit
- 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
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は送信出力制御装置に係
り、特にディジタルコードレス電話等の双方向移動体通
信網の基地局又は移動局における送信出力制御装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission output control device, and more particularly to a transmission output control device in a base station or mobile station of a two-way mobile communication network such as a digital cordless telephone.
【０００２】[0002]
【従来の技術】図３は従来の送信出力制御装置の一例の
ブロック図を示す。この送信出力制御装置は移動体通信
網の基地局に設けられた例で、アンテナ１、基地局受信
部２、復調部３、チャネルコーデック部４、変調部５、
及び送信電力増幅部６よりなる。2. Description of the Related Art FIG. 3 is a block diagram showing an example of a conventional transmission output control device. This transmission output control device is an example provided in a base station of a mobile communication network, and includes an antenna 1, a base station reception unit 2, a demodulation unit 3, a channel codec unit 4, a modulation unit 5,
And a transmission power amplifier 6.
【０００３】この送信出力制御装置は、移動局（図示せ
ず）からの送信電波をアンテナ１で受信し、その受信電
波を基地局受信部で所定周波数帯の受信信号に変換した
後、復調部３に入力して復調させる。復調部３の出力復
調信号はチャネルコーデック部４に供給されて、ここで
所定の信号形態に変換された後、図示しない交換機を通
して公衆網に接続される。In this transmission output control device, a transmission radio wave from a mobile station (not shown) is received by an antenna 1, the reception radio wave is converted into a reception signal in a predetermined frequency band by a base station reception unit, and then a demodulation unit. Input to 3 for demodulation. The demodulated signal output from the demodulation unit 3 is supplied to the channel codec unit 4, converted into a predetermined signal form here, and then connected to the public network through a switch (not shown).
【０００４】また、チャネルコーデック部４からの信号
は変調部５により変調された後、送信電力増幅部６で増
幅及び所定の周波数帯への変換を行われて送信信号とな
り、アンテナ１より移動局へ送信される。ここで、送信
電力増幅部６は変調部５より取り出された、変調されて
いる信号を予め定められた電力レベルに増幅しており、
その増幅度は一般に通信エリアの大きさに応じて固定的
に設定されている。Further, the signal from the channel codec section 4 is modulated by the modulation section 5, and then amplified and converted into a predetermined frequency band by the transmission power amplification section 6 to become a transmission signal, which is transmitted from the antenna 1 to the mobile station. Sent to. Here, the transmission power amplification unit 6 amplifies the modulated signal extracted from the modulation unit 5 to a predetermined power level,
The amplification degree is generally fixedly set according to the size of the communication area.
【０００５】[0005]
【発明が解決しようとする課題】従って、上記の従来の
送信出力制御装置は、通信状態に関係なく、送信電力を
固定的に制御している。しかし、移動体通信においては
通常、同一の通信品質を得るためには、移動局が移動し
ている時の方が静止している時よりも高い電界を必要と
するため、従来の送信出力制御装置では移動局が移動中
に一定の通信品質が得られるだけの送信電力に固定して
おり、その結果、移動局が静止しているときには送信電
力が過大となり、消費電力が過大となるという問題があ
る。Therefore, the above-mentioned conventional transmission output control device fixedly controls the transmission power regardless of the communication state. However, in mobile communication, normally, in order to obtain the same communication quality, a higher electric field is required when the mobile station is moving than when it is stationary. In the device, the transmission power is fixed so that the mobile station can obtain a certain communication quality while moving, and as a result, the transmission power becomes excessive when the mobile station is stationary, resulting in excessive power consumption. There is.
【０００６】そこで、従来より受信電界のフェージング
ピッチと受信電界に基づいて送信出力を制御する送信出
力制御装置が知られているが（例えば、特開昭６４−３
２７２７号公報）、このものはディジタルコードレス電
話（ＰＨＰ：Ｐｅｒｓｏｎａｌ Ｈａｎｄｙ Ｐｈｏｎ
ｅ）のように、移動局の移動速度がそれほど大きく変化
せず、また干渉等の電波伝搬時の影響を受け易い移動通
信システムにはそれほど効果が得られない。Therefore, a transmission output control device for controlling the transmission output based on the fading pitch of the reception electric field and the reception electric field has been conventionally known (for example, JP-A-64-3).
No. 2727), this is a digital cordless telephone (PHP: Personal Handy Phone).
As in the case of e), the moving speed of the mobile station does not change so much and the effect is not so great in a mobile communication system that is easily affected by radio wave propagation such as interference.
【０００７】本発明は上記の点に鑑みなされたもので、
通信品質を監視し、通信品質に基づいて送信出力制御を
行うことにより、上記の課題を解決した送信出力制御装
置を提供することを目的とする。The present invention has been made in view of the above points,
An object of the present invention is to provide a transmission output control device that solves the above problems by monitoring communication quality and performing transmission output control based on the communication quality.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は互いに無線通信を行う移動局及び基地局の
少なくとも一方に設けられた送信出力制御装置であっ
て、無線送信波の受信信号からフレームエラー率を測定
するフレームエラー率測定部と、フレームエラー率に基
づいて最適の送信電力を判定する送信電力判定部と、送
信電力判定部の判定結果に応じて送信電力を可変制御し
て送信波を出力する送信手段とを有する構成としたもの
である。In order to achieve the above object, the present invention is a transmission output control device provided in at least one of a mobile station and a base station that perform wireless communication with each other, and receives a radio transmission wave. A frame error rate measurement unit that measures a frame error rate from a signal, a transmission power determination unit that determines the optimum transmission power based on the frame error rate, and a transmission power variably controlled according to the determination result of the transmission power determination unit. And a transmission means for outputting a transmission wave.
【０００９】[0009]
【作用】本発明では、フレームエラー率に基づいて送信
電力判定部が最適な送信電力を判定し、この判定結果に
応じて送信手段が最適な送信電力の送信波を送信する。
従って、上記のフレームエラー率が所定の基準値以下の
ときは送信電力を低下させることができる。また、上記
のフレームエラー率は干渉等の電波伝搬による影響に応
じて変化するため、本発明では電波伝搬による影響を考
慮した送信電力で送信することもできる。According to the present invention, the transmission power determination unit determines the optimum transmission power based on the frame error rate, and the transmission means transmits the transmission wave having the optimum transmission power according to the determination result.
Therefore, when the frame error rate is equal to or lower than the predetermined reference value, the transmission power can be reduced. Further, since the frame error rate changes depending on the influence of radio wave propagation such as interference, the present invention allows transmission with transmission power considering the influence of radio wave propagation.
【００１０】[0010]
【実施例】図１は本発明の第１実施例のブロック図を示
す。同図中、図３と同一構成部分には同一符号を付し、
その説明を省略する。図１に示す実施例はＰＨＰの親機
で、屋外では基地局として用いられる。この基地局は、
基地局受信部２、復調部３、チャネルコーデック部４、
変調部５及び送信電力増幅部９よりなる従来の基地局の
構成に加えて、フレームエラー率測定部７と送信電力判
定部８を設け、更に送信電力増幅部９を送信電力判定部
８の出力判定結果に応じて出力送信電力が可変制御され
る構成に変更したものである。1 shows a block diagram of a first embodiment of the present invention. In the figure, the same components as those in FIG.
The description is omitted. The embodiment shown in FIG. 1 is a master unit of PHP and is used as a base station outdoors. This base station
Base station receiving unit 2, demodulation unit 3, channel codec unit 4,
In addition to the configuration of the conventional base station including the modulation unit 5 and the transmission power amplification unit 9, a frame error rate measurement unit 7 and a transmission power determination unit 8 are provided, and the transmission power amplification unit 9 outputs the transmission power determination unit 8. The configuration is such that the output transmission power is variably controlled according to the determination result.
【００１１】フレームエラー率測定部７は受信信号中の
無線フレームのユニークワード又は誤り訂正符号（例え
ば、サイクリック・リダンダンシイ・チェック・コード
（ＣＲＣ）など）からフレームエラー率を測定する。The frame error rate measuring unit 7 measures a frame error rate from a unique word or an error correction code (for example, cyclic redundancy check code (CRC)) of a radio frame in a received signal.
【００１２】送信電力判定部８はフレームエラー率を基
にそのフレームエラー率が最小となるような送信電力判
定結果を生成し、それを送信電力増幅部９に出力し、そ
の出力送信電力を制御する。The transmission power determination unit 8 generates a transmission power determination result that minimizes the frame error rate based on the frame error rate, outputs the result to the transmission power amplification unit 9, and controls the output transmission power thereof. To do.
【００１３】次に、本実施例の動作について説明する。
移動機（ここでは、ＰＨＰの子機であるディジタルコー
ドレス電話機）から送信された送信波は、アンテナ１で
受信され、基地局受信部２で所定帯域の受信信号に変換
され、更に復調部３を経てチャネルコーデック部４に入
力される。Next, the operation of this embodiment will be described.
A transmission wave transmitted from a mobile device (here, a digital cordless telephone which is a child device of PHP) is received by an antenna 1, converted into a reception signal of a predetermined band by a base station reception unit 2, and further demodulated by a demodulation unit 3. Then, it is input to the channel codec unit 4.
【００１４】フレームエラー率測定部７はチャネルコー
デック部４を介して入力される受信信号（復調データ）
の無線フレームのユニークワード、又はＣＲＣチェック
の結果、誤りを示すフレーム数をある時間内で算出し、
その平均誤り率（フレームエラー率）を算出・測定す
る。The frame error rate measuring unit 7 receives the received signal (demodulated data) via the channel codec unit 4.
As a result of the unique word of the wireless frame of or the CRC check, the number of frames showing an error is calculated within a certain time,
The average error rate (frame error rate) is calculated and measured.
【００１５】送信電力判定部８は上記のフレームエラー
率測定部７で測定されたフレームエラー率が入力され、
このフレーエラー率を予め定めた基準値と大小比較し
て、フレームエラー率が基準値より小であるか否かを判
定した判定結果を送信電力増幅部９へ制御信号として出
力する。The transmission power determination unit 8 receives the frame error rate measured by the frame error rate measurement unit 7 described above,
The frame error rate is compared with a predetermined reference value to determine whether the frame error rate is smaller than the reference value, and the determination result is output to the transmission power amplification unit 9 as a control signal.
【００１６】送信電力増幅部９はこの制御信号に基づ
き、フレームエラー率が基準値より小である（エラーが
少ない）ときには、送信電力増幅部９の増幅度を現在の
値よりも所定値下げるように制御する。Based on this control signal, the transmission power amplification unit 9 lowers the amplification degree of the transmission power amplification unit 9 by a predetermined value from the current value when the frame error rate is smaller than the reference value (there are few errors). To control.
【００１７】このようにして、上記の制御を繰り返すこ
とにより、一定のフレームエラー率で通信ができること
となり、これにより移動局が静止しているときの送信電
力が適切になり、その結果消費電力を低減することがで
きる。また、本実施例ではフレームエラー率により送信
出力を制御しているから、送信電波の伝搬状況の悪化に
も対応可能である。In this way, by repeating the above control, communication can be performed at a constant frame error rate, whereby the transmission power when the mobile station is stationary becomes appropriate, and as a result, the power consumption is reduced. It can be reduced. Further, in this embodiment, since the transmission output is controlled by the frame error rate, it is possible to deal with the deterioration of the propagation condition of the transmission radio wave.
【００１８】図２は本発明の第２実施例のブロック図を
示す。同図中、図１と同一構成部分には同一符号を付
し、その説明を省略する。図２に示す実施例は、移動局
（ＰＨＰの子機）に設けた例である。この移動局は、ア
ンテナ１１、移動局受信部１２、復調部１３、チャネル
コーデック部１４、変調部１５、送信電力増幅部１６、
フレームエラー率測定部１７、及び送信電力判定部１８
より構成されている。FIG. 2 shows a block diagram of a second embodiment of the present invention. In the figure, the same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The embodiment shown in FIG. 2 is an example provided in a mobile station (a handset of PHP). This mobile station includes an antenna 11, a mobile station receiver 12, a demodulator 13, a channel codec 14, a modulator 15, a transmission power amplifier 16,
Frame error rate measurement unit 17 and transmission power determination unit 18
It is composed of
【００１９】上記の構成ブロック中、図１と同じ名称の
ブロックは図１と同じ動作をする。本実施例も移動局の
通話品質の状態をフレームエラー率測定部１７で常時監
視し、その監視結果により送信電力判定部１８を介して
送信電力増幅部１６の出力送信波の送信電力をダイナミ
ックに可変制御することにより、消費電力の低減を実現
することができる。Of the above-mentioned constituent blocks, the block having the same name as in FIG. 1 operates in the same manner as in FIG. Also in this embodiment, the state of speech quality of the mobile station is constantly monitored by the frame error rate measurement unit 17, and the transmission power of the output transmission wave of the transmission power amplification unit 16 is dynamically changed via the transmission power determination unit 18 according to the monitoring result. By variably controlling, reduction of power consumption can be realized.
【００２０】[0020]
【発明の効果】以上説明したように、本発明によれば、
フレームエラー率に基づいて最適な送信電力の送信波を
送信するようにしたため、一定のフレームエラー率で通
信ができることとなり、これにより移動局が静止してい
るときの送信電力が適切になり、その結果消費電力を低
減することができる。As described above, according to the present invention,
Since the transmission wave of the optimum transmission power is transmitted based on the frame error rate, it becomes possible to communicate at a constant frame error rate, which makes the transmission power appropriate when the mobile station is stationary, and As a result, power consumption can be reduced.
【００２１】また、本発明ではフレームエラー率により
送信出力を制御しているため、送信電波の伝搬状況の悪
化にも対応可能であり、特にディジタルコードレス電話
に適用して好適である。Further, in the present invention, since the transmission output is controlled by the frame error rate, it is possible to deal with the deterioration of the propagation condition of the transmission radio wave, and it is particularly suitable for the digital cordless telephone.
【図１】本発明の第１実施例のブロック図である。FIG. 1 is a block diagram of a first embodiment of the present invention.
【図２】本発明の第２実施例のブロック図である。FIG. 2 is a block diagram of a second embodiment of the present invention.
【図３】従来の一例のブロック図である。FIG. 3 is a block diagram of a conventional example.
２ 基地局受信部 ３ 復調部 ４ チャネルコーデック部 ５ 変調部 ７、１７ フレームエラー率測定部 ８、１８ 送信電力判定部 ９、１６ 送信電力増幅部 2 base station receiving section 3 demodulating section 4 channel codec section 5 modulating section 7, 17 frame error rate measuring section 8, 18 transmission power determining section 9, 16 transmission power amplifying section
Claims (2)
の少なくとも一方に設けられた送信出力制御装置であっ
て、 無線送信波の受信信号からフレームエラー率を測定する
フレームエラー率測定部と、 該フレームエラー率に基づいて最適の送信電力を判定す
る送信電力判定部と、 該送信電力判定部の判定結果に応じて送信電力を可変制
御して送信波を出力する送信手段とを有することを特徴
とする送信出力制御装置。1. A transmission output control device provided in at least one of a mobile station and a base station that perform wireless communication with each other, and a frame error rate measurement unit that measures a frame error rate from a received signal of a wireless transmission wave, A transmission power determining unit that determines an optimum transmission power based on the frame error rate; and a transmission unit that variably controls the transmission power according to the determination result of the transmission power determining unit and outputs a transmission wave. A characteristic transmission output control device.
ドレス電話の子機及び親機であることを特徴とする請求
項１記載の送信出力制御装置。2. The transmission output control device according to claim 1, wherein the mobile station and the base station are a slave unit and a master unit of a digital cordless telephone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5192739A JPH0730482A (en) | 1993-07-07 | 1993-07-07 | Transmission output control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5192739A JPH0730482A (en) | 1993-07-07 | 1993-07-07 | Transmission output control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0730482A true JPH0730482A (en) | 1995-01-31 |
Family
ID=16296260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5192739A Pending JPH0730482A (en) | 1993-07-07 | 1993-07-07 | Transmission output control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730482A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997050197A1 (en) * | 1996-06-27 | 1997-12-31 | Ntt Mobile Communications Network Inc. | Transmitted power controller |
| EP0847146A2 (en) * | 1996-12-05 | 1998-06-10 | Nec Corporation | A transmission power control apparatus for a mobile communication system |
| US6963753B1 (en) | 1998-11-02 | 2005-11-08 | Nec Corporation | Transmission power control method and transmission power control apparatus in mobile communication system |
| US7406093B2 (en) | 2003-01-31 | 2008-07-29 | Matsushita Electric Industrial Co., Ltd. | Station discovery processing method and wireless communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797240A (en) * | 1980-12-08 | 1982-06-16 | Nec Corp | Radio equipment for simultaneous transmission and reception |
| JPH02185127A (en) * | 1989-01-11 | 1990-07-19 | Toyo Commun Equip Co Ltd | Hf communication system |
-
1993
- 1993-07-07 JP JP5192739A patent/JPH0730482A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797240A (en) * | 1980-12-08 | 1982-06-16 | Nec Corp | Radio equipment for simultaneous transmission and reception |
| JPH02185127A (en) * | 1989-01-11 | 1990-07-19 | Toyo Commun Equip Co Ltd | Hf communication system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6035210A (en) * | 1996-05-12 | 2000-03-07 | Nec Corporation | Transmission power control apparatus for a mobile communication system |
| WO1997050197A1 (en) * | 1996-06-27 | 1997-12-31 | Ntt Mobile Communications Network Inc. | Transmitted power controller |
| EP0853393A1 (en) * | 1996-06-27 | 1998-07-15 | Ntt Mobile Communications Network Inc. | Transmitted power controller |
| US6341224B1 (en) | 1996-06-27 | 2002-01-22 | Ntt Mobile Communications Network, Inc. | Power controller for mobile communication system wherein a signal to interference threshold is dynamically moved based on an error rate measurement |
| EP0853393A4 (en) * | 1996-06-27 | 2002-05-15 | Ntt Docomo Inc | Transmitted power controller |
| CN1102308C (en) * | 1996-06-27 | 2003-02-26 | Ntt移动通信网株式会社 | Transmitted power controller |
| EP0847146A2 (en) * | 1996-12-05 | 1998-06-10 | Nec Corporation | A transmission power control apparatus for a mobile communication system |
| EP0847146A3 (en) * | 1996-12-05 | 2000-08-30 | Nec Corporation | A transmission power control apparatus for a mobile communication system |
| US6963753B1 (en) | 1998-11-02 | 2005-11-08 | Nec Corporation | Transmission power control method and transmission power control apparatus in mobile communication system |
| US7406093B2 (en) | 2003-01-31 | 2008-07-29 | Matsushita Electric Industrial Co., Ltd. | Station discovery processing method and wireless communication device |
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