JPH0870274A - Mobile communication system and mobile station equipment - Google Patents
Mobile communication system and mobile station equipmentInfo
- Publication number
- JPH0870274A JPH0870274A JP6203873A JP20387394A JPH0870274A JP H0870274 A JPH0870274 A JP H0870274A JP 6203873 A JP6203873 A JP 6203873A JP 20387394 A JP20387394 A JP 20387394A JP H0870274 A JPH0870274 A JP H0870274A
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- base station
- power
- transmission power
- signal 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
-
- 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】本発明は双方向スペクトラム通信
方式に利用する。本発明は移動通信に利用する。本発明
は送信電力の自動調整技術に関する。The present invention is used in a bidirectional spectrum communication system. The present invention is used for mobile communication. The present invention relates to a transmission power automatic adjustment technique.
【０００２】[0002]
【従来の技術】従来例を図６を参照して説明する。図６
は従来技術を実施するときの全体構成および受信信号電
力変化状況を示す図である。図６（ｂ）および（ｃ）
は、横軸に時間をとり、縦軸に基地局または移動局の受
信信号電力をとる。図６（ａ）に示すような構成におい
て、基地局１で受信した電力をもとに、基地局１が移動
局２に対して、基地局１での受信信号電力が図６（ｂ）
に示すように一定になるように電力制御信号を送信し、
移動局２ではその電力制御信号にしたがって送信電力を
制御する。ここで、受信電力とは、基地局１または移動
局２がそのとき受信しているノイズ成分および無線信号
成分を全て含めた受信電力のことをいい、受信信号電力
とは、基地局１または移動局２がそのとき受信している
所望の基地局または移動局からの無線信号成分だけの受
信電力、すなわち希望信号の受信電力をいう。2. Description of the Related Art A conventional example will be described with reference to FIG. Figure 6
FIG. 3 is a diagram showing an overall configuration and a received signal power change situation when implementing a conventional technique. 6 (b) and 6 (c)
Represents the time on the horizontal axis and the received signal power of the base station or mobile station on the vertical axis. In the configuration shown in FIG. 6A, based on the power received by the base station 1, the base station 1 transmits the received signal power at the base station 1 to the mobile station 2 as shown in FIG.
Transmit the power control signal to be constant as shown in
The mobile station 2 controls the transmission power according to the power control signal. Here, the received power refers to the received power including all noise components and radio signal components that the base station 1 or the mobile station 2 is receiving at that time, and the received signal power is the base station 1 or the mobile station. It is the reception power of only the radio signal component from the desired base station or mobile station that the station 2 is receiving at that time, that is, the reception power of the desired signal.
【０００３】次に、従来例の動作を図７を参照して説明
する。図７は従来例の動作を示すフローチャートであ
る。従来の技術では、基地局１において移動局２からの
受信信号電力を検出し（Ｓ１）、所要受信信号電力より
も大きい場合には（Ｓ２）、基地局１から移動局２に対
してその移動局２の送信電力を下げることを要求する制
御信号を送信し（Ｓ６）、その制御信号を受信した移動
局２は送信電力を下げ（Ｓ７）、所要受信信号電力より
も小さい場合には（Ｓ３）、その基地局１からその移動
局２に対してその移動局２の送信電力を上げることを要
求する制御信号を送信し（Ｓ４）、その制御信号を受信
したその移動局２は送信電力を上げる（Ｓ５）。Next, the operation of the conventional example will be described with reference to FIG. FIG. 7 is a flowchart showing the operation of the conventional example. According to the conventional technique, the base station 1 detects the received signal power from the mobile station 2 (S1), and if the received signal power is higher than the required received signal power (S2), the base station 1 moves the mobile station 2 to the mobile station 2. The mobile station 2 that has transmitted the control signal requesting to lower the transmission power of the station 2 (S6) and has received the control signal lowers the transmission power (S7), and if it is smaller than the required reception signal power (S3). ), The base station 1 transmits to the mobile station 2 a control signal requesting to increase the transmission power of the mobile station 2 (S4), and the mobile station 2 receiving the control signal transmits the transmission power. Raise (S5).
【０００４】[0004]
【発明が解決しようとする課題】このような従来の技術
では、基地局から移動局に送信電力を変更するための制
御信号を送信しなければならず、制御手順およびハード
ウェア構成が複雑になるという問題があった。また、通
信情報信号とともに制御信号を送信するために信号構成
が複雑になり、送信時間もその分多くかかる。これは、
電波の有効利用の観点からも好ましくない。In such a conventional technique, a control signal for changing the transmission power must be transmitted from the base station to the mobile station, which complicates the control procedure and the hardware configuration. There was a problem. In addition, since the control signal is transmitted together with the communication information signal, the signal structure becomes complicated and the transmission time also increases accordingly. this is,
It is not preferable from the viewpoint of effective use of radio waves.
【０００５】本発明は、このような背景に行われたもの
であり、移動局における送信電力制御手順を簡単化する
ことができる移動通信方式および移動局装置を提供する
ことを目的とする。本発明は、移動局における送信電力
制御を簡単なハードウェア構成で実現することができる
移動通信方式および移動局装置を提供することを目的と
する。本発明は、通信に必要最小限の電力を用いて通信
を行うことができる移動通信方式および移動局装置を提
供することを目的とする。本発明は、電波の有効利用を
はかることができる移動通信方式および移動局装置を提
供することを目的とする。The present invention has been made against such a background, and an object thereof is to provide a mobile communication system and a mobile station apparatus which can simplify a transmission power control procedure in a mobile station. An object of the present invention is to provide a mobile communication system and a mobile station apparatus that can realize transmission power control in a mobile station with a simple hardware configuration. An object of the present invention is to provide a mobile communication system and a mobile station device that can perform communication using the minimum power required for communication. An object of the present invention is to provide a mobile communication system and a mobile station device that can effectively use radio waves.
【０００６】[0006]
【課題を解決するための手段】本発明の第一の観点は、
基地局と、この基地局と無線信号により接続される移動
局とを備え、この移動局は、その送信電力を調節する手
段を備えた移動通信方式である。The first aspect of the present invention is to:
The mobile station is a mobile communication system that includes a base station and a mobile station that is connected to the base station by a radio signal. The mobile station includes a unit that adjusts its transmission power.
【０００７】ここで、本発明の特徴とするところは、前
記無線信号は、スペクトラム拡散通信に用いる無線信号
であり、前記調整する手段は、前記基地局から到来する
無線信号の受信信号電力にしたがって前記移動局から送
信される無線信号の前記基地局での受信信号電力を推定
する手段と、この推定する手段の出力にしたがって、こ
の移動局の送信電力を 〔（基地局の送信電力）−（移動局での受信信号電力）
＋（基地局での所要受信信号電力）＋（上り回線と下り
回線の距離に対する伝搬損失の差）〕ｄＢ に調整する手段とを備えるところにある。Here, the feature of the present invention is that the radio signal is a radio signal used for spread spectrum communication, and the adjusting means is in accordance with the received signal power of the radio signal coming from the base station. Means for estimating the received signal power at the base station of the radio signal transmitted from the mobile station, and the transmission power of the mobile station according to the output of the estimating means [(transmission power of the base station)-( Received signal power at mobile station)
+ (Required received signal power at the base station) + (difference in propagation loss with respect to distance between uplink and downlink)] unit for adjusting to dB.
【０００８】これにより、基地局からの制御に依存する
ことなく、移動局において送信電力の調整を行うことが
できる。[0008] With this, the transmission power can be adjusted in the mobile station without depending on the control from the base station.
【０００９】本発明の第二の観点は、基地局からの無線
信号を受信する受信機と、基地局へ無線信号を送信する
送信機とを備え、その送信電力を調節する手段を備えた
移動局装置である。A second aspect of the present invention is a mobile station comprising a receiver for receiving a radio signal from a base station, a transmitter for transmitting a radio signal to the base station, and means for adjusting the transmission power thereof. It is a station device.
【００１０】ここで、本発明の特徴とするところは、前
記無線信号は、スペクトラム拡散通信に用いる無線信号
であり、前記調整する手段は、前記基地局から到来する
無線信号の受信信号電力にしたがって前記送信機から送
信される無線信号の前記基地局での受信信号電力を推定
する手段と、この推定する手段の出力にしたがって送信
電力を 〔（基地局の送信電力）−（移動局での受信信号電力）
＋（基地局での所要受信信号電力）＋（上り回線と下り
回線の距離に対する伝搬損失の差）〕ｄＢ に調整する手段とを備えるところにある。Here, a feature of the present invention is that the radio signal is a radio signal used for spread spectrum communication, and the adjusting means is in accordance with the received signal power of the radio signal coming from the base station. A means for estimating the received signal power of the radio signal transmitted from the transmitter at the base station, and the transmission power according to the output of the estimating means [(transmission power of the base station)-(reception at the mobile station Signal power)
+ (Required received signal power at the base station) + (difference in propagation loss with respect to distance between uplink and downlink)] unit for adjusting to dB.
【００１１】これにより、基地局からの制御に依存する
ことなく、送信電力の調整を行うことができる移動局装
置が実現できる。As a result, it is possible to realize a mobile station apparatus capable of adjusting the transmission power without depending on the control from the base station.
【００１２】前記無線信号は、伝送帯域幅が４ＭＨｚ以
上であることが望ましい。The radio signal preferably has a transmission bandwidth of 4 MHz or more.
【００１３】[0013]
【作用】移動通信においては、伝搬損失の変動は距離に
対する伝搬損失、短区間中央値変動特性、瞬時値変動特
性の積にモデル化される。短区間中央値変動特性は上り
回線と下り回線とがほぼ等しい特性を有するので、瞬時
値変動が小さくなる広帯域伝送の場合には上り回線と下
り回線の伝搬損失の差は距離に対する伝搬損失のみに依
存することになり、距離に対する伝搬損失は周波数に依
存する。したがって、スペクトラム拡散通信方式に用い
られる移動局においては、基地局から到来する無線信号
の受信信号電力を検出すれば、基地局における移動局か
らの受信信号電力を推定できるので、基地局から移動局
の送信電力を変更する制御信号を送ることなく、移動局
において送信電力を制御することができる。In mobile communication, the variation of the propagation loss is modeled as the product of the propagation loss with respect to the distance, the short-term median variation characteristic, and the instantaneous value variation characteristic. Since the short-range median fluctuation characteristics have the same characteristics for the uplink and downlink, in the case of wideband transmission in which the instantaneous value fluctuation is small, the difference in the propagation loss between the uplink and the downlink is only the propagation loss with respect to the distance. The propagation loss with distance depends on the frequency. Therefore, in the mobile station used in the spread spectrum communication system, the received signal power from the mobile station in the base station can be estimated by detecting the received signal power of the radio signal coming from the base station. The transmission power can be controlled in the mobile station without sending a control signal for changing the transmission power of the.
【００１４】[0014]
【実施例】本発明実施例の構成を図１および図２ないし
図３を参照して説明する。図１は本発明実施例の全体構
成を示す図である。図２は移動局装置のブロック構成図
である。図３は本発明実施例における基地局および移動
局における受信信号電力の変化の例を示す図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described with reference to FIGS. 1 and 2 to 3. FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention. FIG. 2 is a block diagram of the mobile station device. FIG. 3 is a diagram showing an example of changes in received signal power at the base station and the mobile station in the embodiment of the present invention.
【００１５】本発明は、図１に示すように、基地局１
と、この基地局１と無線信号である上り回線３および下
り回線４により接続される移動局２とを備え、この移動
局２は、図２に示すように、その送信電力を調節する手
段としての電力調整部５０を備えた移動通信方式であ
る。The present invention, as shown in FIG.
And a mobile station 2 connected to the base station 1 by an uplink 3 and a downlink 4 which are radio signals. As shown in FIG. 2, the mobile station 2 serves as means for adjusting its transmission power. This is a mobile communication system including the power adjusting unit 50.
【００１６】ここで図３を参照して本発明実施例におけ
る基地局１および移動局２での受信信号電力変化状況を
説明する。横軸に時間をとり、縦軸に基地局１または移
動局２における受信信号電力を示す。本発明実施例は、
図３（ａ）に示すように、基地局１における受信信号電
力を一定とするために、図３（ｂ）に示す移動局での受
信信号電力に基づいて移動局２は自律的に送信電力調整
を行っている。Now, with reference to FIG. 3, description will be made on the received signal power change situation at the base station 1 and the mobile station 2 in the embodiment of the present invention. The horizontal axis represents time, and the vertical axis represents the received signal power at the base station 1 or mobile station 2. The embodiment of the present invention is
As shown in FIG. 3A, in order to keep the received signal power at the base station 1 constant, the mobile station 2 autonomously transmits the transmitted power based on the received signal power at the mobile station shown in FIG. 3B. Making adjustments.
【００１７】ここで、本発明の特徴とするところは、上
り回線３および下り回線４は、スペクトラム拡散通信に
用いる無線信号であり、電力調整部５０は、基地局１か
ら到来する無線信号の受信信号電力にしたがって移動局
２から送信される無線信号の基地局１での受信信号電力
を推定する手段としての受信電力検出器３７と、この受
信電力検出器３７の出力にしたがって、この移動局２の
送信電力を 〔（基地局の送信電力）−（移動局での受信信号電力）
＋（基地局での所要受信信号電力）＋（上り回線と下り
回線の距離に対する伝搬損失の差）〕ｄＢ に調整する手段としての電力比較器４１とを備えるとこ
ろにある。本発明実施例において無線信号は、伝送帯域
幅が４ＭＨｚ以上である。Here, the feature of the present invention is that the up-link 3 and the down-link 4 are radio signals used for spread spectrum communication, and the power adjusting unit 50 receives the radio signals coming from the base station 1. The received power detector 37 as means for estimating the received signal power at the base station 1 of the radio signal transmitted from the mobile station 2 according to the signal power, and the mobile station 2 according to the output of the received power detector 37. Transmission power of [(transmission power of base station)-(received signal power at mobile station)]
+ (Required received signal power at the base station) + (difference in propagation loss with respect to distance between uplink and downlink)! The power comparator 41 as a means for adjusting to dB. In the embodiment of the present invention, the wireless signal has a transmission bandwidth of 4 MHz or more.
【００１８】次に、本発明実施例の動作を説明する。移
動局２において下り回線の受信信号電力から、基地局１
と移動局２間の伝搬損失を推定し、基地局１における受
信信号電力が一定になるように、移動局２の送信電力を
決定する。Next, the operation of the embodiment of the present invention will be described. From the received signal power of the downlink in the mobile station 2, the base station 1
And the transmission loss of the mobile station 2 is determined so that the received signal power at the base station 1 is constant.
【００１９】距離に対する伝搬損失Ｌは無指向性アンテ
ナを用いた自由空間の場合には、 Ｌ＝２０ｌｏｇ（４πｄｆ／ｃ） のように表される。ここで、ｆ：周波数、ｃ：光速、
ｄ：伝搬距離である。したがって、上り回線３の周波数
をｆ1 、下り回線４の周波数をｆ2 とすれば、上り回線
３と下り回線４の距離に対する伝搬損失の差は、 ２０ｌｏｇ（ｆ1 ／ｆ2 ） と表される。なお、ｆ1 ≒ｆ2 のときには、上り回線３
と下り回線４の距離に対する伝搬損失の差は“０”とし
てよい。The propagation loss L with respect to the distance is expressed as L = 20log (4πdf / c) in the case of a free space using an omnidirectional antenna. Where f: frequency, c: speed of light,
d: Propagation distance. Therefore, if the frequency of the up link 3 is f 1 and the frequency of the down link 4 is f 2 , the difference in the propagation loss with respect to the distance between the up link 3 and the down link 4 is expressed as 20 log (f 1 / f 2 ). It When f 1 ≈f 2 , the uplink 3
The difference between the propagation loss and the distance of the downlink 4 may be "0".
【００２０】移動局２での受信信号電力は、全受信電力
を表す増幅器３４ａの制御電圧と全受信電力中の希望信
号の受信電力の割合を表す２次復調器３５の出力の積と
して表される。アンテナ３１で受信された信号はアンテ
ナ共用器３２に入力され、アンテナ共用器３２の出力は
受信機３３に入力され、その受信機３３の出力は増幅器
３４ａに入力され、その増幅器３４ａの出力は２次復調
器３５に入力され、逆スペクトラム拡散が行われ、その
増幅器３４ａの制御電圧は受信電力検出器３７に入力さ
れ、２次復調器３５の出力は、１次復調器３６に入力さ
れ、情報信号に復調されるとともに受信電力検出器３７
に入力される。受信電力検出器３７では受信信号電力が
検出され、受信電力検出器３７の出力は電力比較器４１
に入力され、電力比較器４１では移動局２の送信電力
と、 〔（基地局の送信電力）−（移動局での受信信号電力）
＋（基地局での所要受信信号電力）＋（上り回線と下り
回線の距離に対する伝搬損失の差）〕ｄＢ が比較される。基地局１での受信信号電力は、移動局２
での受信信号電力にしたがって電力比較器４１内で推定
演算される。１次復調器３６の出力は情報信号として出
力される。送信する情報信号は１次変調器３８に入力さ
れ、１次変調器３８の出力は２次変調器３９に入力さ
れ、その２次変調器３９の出力は増幅器３４ｂに入力さ
れ、その増幅器３４ｂは電力比較器４１の出力信号に基
づいてその２次変調器３９より入力された信号を増幅
し、その増幅器３４ｂの出力は送信機４０に入力され、
その送信機４０の出力はアンテナ共用器３２に入力さ
れ、そのアンテナ共用器３２の出力信号はアンテナ３１
に入力されて送信される。The received signal power at the mobile station 2 is expressed as the product of the control voltage of the amplifier 34a representing the total received power and the output of the secondary demodulator 35 representing the ratio of the received power of the desired signal in the total received power. It The signal received by the antenna 31 is input to the antenna duplexer 32, the output of the antenna duplexer 32 is input to the receiver 33, the output of the receiver 33 is input to the amplifier 34a, and the output of the amplifier 34a is 2 It is input to the secondary demodulator 35, inverse spectrum spread is performed, the control voltage of the amplifier 34a is input to the reception power detector 37, the output of the secondary demodulator 35 is input to the primary demodulator 36, and Received power detector 37 demodulated into a signal
Is input to The received power detector 37 detects the received signal power, and the output of the received power detector 37 is the power comparator 41.
To the transmission power of the mobile station 2 and [(transmission power of base station)-(reception signal power at mobile station)].
+ (Required received signal power at base station) + (difference in propagation loss with respect to distance between uplink and downlink)] dB is compared. The received signal power at the base station 1 is the mobile station 2
Estimated calculation is performed in the power comparator 41 according to the received signal power at. The output of the primary demodulator 36 is output as an information signal. The information signal to be transmitted is input to the primary modulator 38, the output of the primary modulator 38 is input to the secondary modulator 39, the output of the secondary modulator 39 is input to the amplifier 34b, and the amplifier 34b is The signal input from the secondary modulator 39 is amplified based on the output signal of the power comparator 41, and the output of the amplifier 34b is input to the transmitter 40,
The output of the transmitter 40 is input to the antenna duplexer 32, and the output signal of the antenna duplexer 32 is the antenna 31.
Will be entered and sent.
【００２１】なお、本発明実施例では増幅器３４ａと２
次復調器３５から受信信号電力を検出したが、増幅器３
４ａおよび２次復調器３５のいずれか一方から受信信号
電力を検出することもできる。In the embodiment of the present invention, the amplifiers 34a and 2a
The received signal power is detected from the next demodulator 35, but the amplifier 3
It is also possible to detect the received signal power from either the 4a or the secondary demodulator 35.
【００２２】次に、図４を参照して本発明実施例の動作
を再度説明する。図４は、本発明実施例の動作を示すフ
ローチャートである。移動局２において、基地局１から
受信した無線信号の受信信号電力を検出し（Ｓ１１）、
その移動局２の送信電力が、 〔（基地局の送信電力）−（移動局での受信信号電力）
＋（基地局での所要受信信号電力）＋（上り回線と下り
回線の距離に対する伝搬損失の差）〕ｄＢ よりも大きい場合には（Ｓ１２）、その移動局２の送信
電力を下げ（Ｓ１５）、小さい場合には（Ｓ１３）、そ
の移動局２の送信電力を上げる（Ｓ１４）。Next, the operation of the embodiment of the present invention will be described again with reference to FIG. FIG. 4 is a flowchart showing the operation of the embodiment of the present invention. In the mobile station 2, the received signal power of the radio signal received from the base station 1 is detected (S11),
The transmission power of the mobile station 2 is [(transmission power of base station)-(reception signal power at mobile station)]
+ (Required received signal power at base station) + (difference in propagation loss with respect to distance between uplink and downlink)] dB (S12), lower transmission power of the mobile station 2 (S15) If it is smaller (S13), the transmission power of the mobile station 2 is increased (S14).
【００２３】広帯域伝送を行うと、レベルが落ち込む周
波数が多くなるが、レベルの高い周波数も現れるため、
受信帯域内全体のエネルギーはより平均化され、受信電
力の瞬時的な時間変動は小さくなる（小園；“広帯域伝
送における受信レベル変動諸特性”、テレビジョン学会
技術報告、vol.14,no.52,pp.5-10,RDFT,90-50(1990))。
したがって、帯域内の周波数の違いによる瞬時的なレベ
ル変動の差を抑えることができるため、送信電力のより
適切な制御がしやすくなる。When wideband transmission is performed, the frequency at which the level drops will increase, but there are also frequencies with high levels, so
The energy in the entire reception band is more averaged, and the instantaneous time fluctuation of the reception power becomes smaller (Kozono; "Receiving level fluctuation characteristics in wideband transmission", Technical Report of the Institute of Television Engineers, vol.14, no.52). , pp.5-10, RDFT, 90-50 (1990)).
Therefore, since it is possible to suppress the difference in instantaneous level fluctuation due to the difference in frequency within the band, it becomes easier to more appropriately control the transmission power.
【００２４】図５に参考文献より抜粋した受信帯域幅と
受信信号電力の関係の一例を示す。図５は受信帯域幅と
受信信号電力との関係を示す図である。横軸に移動局２
の移動距離をとり、縦軸に受信信号電力をとる。図５に
よると、帯域幅が０．１５ＭＨｚの場合約１５ｄＢ変化
しているが、４ＭＨｚの場合はほとんど変化していな
い。したがって、４ＭＨｚ以上の場合には、瞬時変動は
ほとんどないので、送信電力は短区間中央値変動および
距離に対する伝搬損失に追従するように制御させればよ
い。FIG. 5 shows an example of the relationship between the reception bandwidth and the reception signal power extracted from the reference document. FIG. 5 is a diagram showing the relationship between the reception bandwidth and the reception signal power. Mobile station 2 on the horizontal axis
And the received signal power on the vertical axis. According to FIG. 5, when the bandwidth is 0.15 MHz, it changes by about 15 dB, but when it is 4 MHz, it hardly changes. Therefore, in the case of 4 MHz or more, since there is almost no instantaneous fluctuation, the transmission power may be controlled so as to follow the short-term median fluctuation and the propagation loss with respect to distance.
【００２５】[0025]
【発明の効果】以上説明したように、本発明によれば、
移動局における送信電力制御手順を簡単化することがで
きる。移動局における送信電力制御を簡単なハードウェ
ア構成で実現することができる。必要最小限の電力を用
いて通信を行うことができる。電波の有効利用をはかる
ことができる。As described above, according to the present invention,
The transmission power control procedure in the mobile station can be simplified. The transmission power control in the mobile station can be realized with a simple hardware configuration. Communication can be performed using the minimum required power. Effective use of radio waves can be planned.
【図１】本発明実施例の全体構成を示す図。FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention.
【図２】移動局装置のブロック構成図。FIG. 2 is a block diagram of a mobile station device.
【図３】本発明実施例における基地局および移動局での
受信信号電力変化状況を示す図。FIG. 3 is a diagram showing changes in received signal power at a base station and a mobile station according to an embodiment of the present invention.
【図４】本発明実施例の動作を示すフローチャート。FIG. 4 is a flowchart showing the operation of the embodiment of the present invention.
【図５】受信帯域幅と受信信号電力との関係を示す図。FIG. 5 is a diagram showing a relationship between a reception bandwidth and a reception signal power.
【図６】従来技術を実施するときの全体構成および受信
信号電力変化状況を示す図。FIG. 6 is a diagram showing an overall configuration and a received signal power change state when a conventional technique is implemented.
【図７】従来例の動作を示すフローチャート。FIG. 7 is a flowchart showing the operation of a conventional example.
１ 基地局 ２ 移動局 ３ 上り回線 ４ 下り回線 ３１ アンテナ ３２ アンテナ共用器 ３３ 受信機 ３４ａ、３４ｂ 増幅器 ３５ ２次復調器 ３６ １次復調器 ３７ 受信電力検出器 ３８ １次変調器 ３９ ２次変調器 ４０ 送信機 ４１ 電力比較器 ５０ 電力調整部 1 Base Station 2 Mobile Station 3 Uplink 4 Downlink 31 Antenna 32 Antenna Duplexer 33 Receiver 34a, 34b Amplifier 35 Secondary Demodulator 36 Primary Demodulator 37 Received Power Detector 38 Primary Modulator 39 Secondary Modulator 40 transmitter 41 power comparator 50 power regulator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 利憲 東京都千代田区内幸町一丁目１番６号 日 本電信電話株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshinori Tanaka 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation
Claims (4)
接続される移動局とを備え、この移動局は、その送信電
力を調節する手段を備えた移動通信方式において、 前記無線信号は、スペクトラム拡散通信に用いる無線信
号であり、 前記調整する手段は、前記基地局から到来する無線信号
の受信信号電力にしたがって前記移動局から送信される
無線信号の前記基地局での受信信号電力を推定する手段
と、 この推定する手段の出力にしたがって、この移動局の送
信電力を 〔（基地局の送信電力）−（移動局での受信信号電力）
＋（基地局での所要受信信号電力）＋（上り回線と下り
回線の距離に対する伝搬損失の差）〕ｄＢ に調整する手段とを備えたことを特徴とする移動通信方
式。1. A mobile communication system, comprising: a base station; and a mobile station connected to the base station by a radio signal, the mobile station comprising means for adjusting its transmission power. A radio signal used for spread spectrum communication, wherein the adjusting means estimates the received signal power at the base station of the radio signal transmitted from the mobile station according to the received signal power of the radio signal coming from the base station. The transmission power of this mobile station is calculated by [(transmission power of base station)-(received signal power at mobile station)]
+ (Required signal power at base station) + (difference in propagation loss with respect to distance between uplink and downlink)] dB for adjusting the mobile communication system.
以上である請求項１記載の移動通信方式。2. The wireless signal has a transmission bandwidth of 4 MHz.
The above is the mobile communication system according to claim 1.
と、基地局へ無線信号を送信する送信機とを備え、 その送信電力を調節する手段を備えた移動局装置におい
て、 前記無線信号は、スペクトラム拡散通信に用いる無線信
号であり、 前記調整する手段は、前記基地局から到来する無線信号
の受信信号電力にしたがって前記送信機から送信される
無線信号の前記基地局での受信信号電力を推定する手段
と、 この推定する手段の出力にしたがって送信電力を 〔（基地局の送信電力）−（移動局での受信信号電力）
＋（基地局での所要受信信号電力）＋（上り回線と下り
回線の距離に対する伝搬損失の差）〕ｄＢ に調整する手段とを備えたことを特徴とする移動局装
置。3. A mobile station apparatus comprising: a receiver for receiving a radio signal from a base station; and a transmitter for transmitting a radio signal to the base station, and a means for adjusting the transmission power thereof, wherein the radio signal Is a radio signal used for spread spectrum communication, and the adjusting unit is a reception signal power at the base station of a radio signal transmitted from the transmitter according to a reception signal power of a radio signal coming from the base station. And the transmission power according to the output of this estimation means [(transmission power of base station)-(reception signal power at mobile station)
+ (Required received signal power at base station) + (difference in propagation loss with respect to distance between uplink and downlink)] dB for adjusting the mobile station apparatus.
以上である請求項３記載の移動局装置。4. The wireless signal has a transmission bandwidth of 4 MHz.
The above is the mobile station apparatus according to claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20387394A JP3154462B2 (en) | 1994-08-29 | 1994-08-29 | Mobile communication system and mobile station device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20387394A JP3154462B2 (en) | 1994-08-29 | 1994-08-29 | Mobile communication system and mobile station device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0870274A true JPH0870274A (en) | 1996-03-12 |
| JP3154462B2 JP3154462B2 (en) | 2001-04-09 |
Family
ID=16481133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20387394A Expired - Lifetime JP3154462B2 (en) | 1994-08-29 | 1994-08-29 | Mobile communication system and mobile station device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3154462B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999016189A1 (en) * | 1996-03-22 | 1999-04-01 | Matsushita Electric Industrial Co., Ltd. | Mobile communication equipment |
| WO2000054417A1 (en) * | 1999-03-06 | 2000-09-14 | Matsushita Electric Industrial Co., Ltd. | Transmitting/receiving device and transmitting/receiving method |
| US6272125B1 (en) | 1997-06-27 | 2001-08-07 | Nec Corporation | Gain compensating apparatus for use with amplifying portion in code division multiple access communication system |
| US6507574B1 (en) | 1998-09-17 | 2003-01-14 | Matsushita Electric Industrial Co., Ltd. | Transmission/reception apparatus and transmit power control method |
| JP2003524986A (en) * | 2000-02-23 | 2003-08-19 | タンティビ・コミュニケーションズ・インコーポレーテッド | Reverse link initial power setting |
-
1994
- 1994-08-29 JP JP20387394A patent/JP3154462B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999016189A1 (en) * | 1996-03-22 | 1999-04-01 | Matsushita Electric Industrial Co., Ltd. | Mobile communication equipment |
| US6272125B1 (en) | 1997-06-27 | 2001-08-07 | Nec Corporation | Gain compensating apparatus for use with amplifying portion in code division multiple access communication system |
| US6490257B1 (en) | 1997-09-19 | 2002-12-03 | Matsushita Electric Industrial Co., Ltd. | Mobile station apparatus and its transmission power method in wireless communication system |
| US6507574B1 (en) | 1998-09-17 | 2003-01-14 | Matsushita Electric Industrial Co., Ltd. | Transmission/reception apparatus and transmit power control method |
| US6522639B1 (en) | 1998-09-17 | 2003-02-18 | Matsushita Electric Industrial Co., Ltd. | Transmission/reception apparatus and transmit power control method |
| US6545991B1 (en) | 1998-09-17 | 2003-04-08 | Matsushita Electric Industrial Co., Ltd. | Diversity method |
| WO2000054417A1 (en) * | 1999-03-06 | 2000-09-14 | Matsushita Electric Industrial Co., Ltd. | Transmitting/receiving device and transmitting/receiving method |
| US6697634B1 (en) | 1999-03-06 | 2004-02-24 | Matsushita Electric Industrial Co., Ltd. | Apparatus and method for selecting a transmit power value from multiple calculated power levels |
| JP2003524986A (en) * | 2000-02-23 | 2003-08-19 | タンティビ・コミュニケーションズ・インコーポレーテッド | Reverse link initial power setting |
| US9661583B2 (en) | 2000-02-23 | 2017-05-23 | Ipr Licensing, Inc. | Reverse link initial power setting using effective radiated power message to compute path loss |
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| Publication number | Publication date |
|---|---|
| JP3154462B2 (en) | 2001-04-09 |
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