JPH07283783A - Radio communication system - Google Patents
Radio communication systemInfo
- Publication number
- JPH07283783A JPH07283783A JP6073196A JP7319694A JPH07283783A JP H07283783 A JPH07283783 A JP H07283783A JP 6073196 A JP6073196 A JP 6073196A JP 7319694 A JP7319694 A JP 7319694A JP H07283783 A JPH07283783 A JP H07283783A
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- base station
- mobile device
- control information
- power control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、無線通信装置の送信
電力を制御して、常に最適な電力で送信を行うことがで
きるようにした無線通信システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system in which the transmission power of a wireless communication device is controlled so that transmission can always be performed with optimum power.
【０００２】[0002]
【従来の技術】近年、自動車電話、携帯電話など、移動
通信に対する需要が著しく増加しており、限られた周波
数帯域上でより多くの加入者容量を確保するため、周波
数利用技術が重要となって来ており、そこで周波数有効
利用のための多重化方式の一つとして、符号分割多重接
続（ＣＤＭＡ）方式が注目されている。このＣＤＭＡ方
式では、移動機から基地局へ種々のレベルで同時に信号
が入力するから、例えば上り回線で基地局に近い移動機
からの信号のレベルが高い場合には、基地局から遠い他
の移動機からの信号が受信不能になるという遠近問題が
発生する。このような問題は上記のＣＤＭＡ方式に限ら
す、移動通信ならば多かれ少なかれ起こってくるもの
で、基地局とどの移動機との相互間においても、常に同
一レベルで相手局からの信号を受信することができるよ
うに、送信電力を制御することが必要となる。2. Description of the Related Art In recent years, the demand for mobile communications such as car phones and mobile phones has increased remarkably, and frequency utilization technology has become important in order to secure more subscriber capacity on a limited frequency band. Therefore, the Code Division Multiple Access (CDMA) system has been attracting attention as one of the multiplexing systems for effective frequency use. In this CDMA system, signals are simultaneously input from the mobile station to the base station at various levels. Therefore, for example, when the level of the signal from the mobile station close to the base station on the uplink is high, another mobile station far from the base station moves. There is a near-far problem that the signal from the aircraft becomes unreceivable. Such a problem is limited to the above-mentioned CDMA system and more or less occurs in mobile communication, and the signal from the partner station is always received at the same level between the base station and any mobile device. In order to be able to do so, it is necessary to control the transmission power.
【０００３】従来、無線通信装置の送信電力を制御し
て、最適な電力で送信を行う無線通信システムとして
は、例えば、図３に示すようなものがある。これは基地
局１に対して移動機２から情報を送信する場合を示して
いる。基地局１には、現在受信している受信電力レベル
と必要最小限の受信電力レベルとを比較する比較回路３
があり、また比較回路３の検出情報に基づいて送信電力
制御情報を生成する判定器４を有している。移動機２
は、判定器４からの情報に基づき移動機２の送信電力を
制御する送信電力制御回路５と、送信電力制御回路５に
よって制御される可変利得の電力増幅回路６とを有して
いる。Conventionally, as a wireless communication system for controlling the transmission power of a wireless communication device to perform transmission at an optimum power, there is, for example, one as shown in FIG. This shows a case where information is transmitted from the mobile device 2 to the base station 1. The base station 1 includes a comparison circuit 3 that compares the currently received reception power level with the minimum required reception power level.
In addition, it has a determiner 4 for generating transmission power control information based on the detection information of the comparison circuit 3. Mobile 2
Has a transmission power control circuit 5 that controls the transmission power of the mobile device 2 based on information from the determiner 4, and a variable gain power amplification circuit 6 that is controlled by the transmission power control circuit 5.
【０００４】基地局１では、移動機２の電力増幅回路６
からアンテナＡ１を介して送信されてくる情報を受信す
るが、その受信レベルは比較回路３に入力され、必要最
小限の受信電力レベルと比較されて、その差が判定器４
に入力される。判定器４ではそれによって移動機２の送
信電力制御情報が生成され、アンテナＡ２を介して移動
機２の送信電力制御回路５に送信されて、可変利得の電
力増幅回路６の利得を制御するようになっている。In the base station 1, the power amplifier circuit 6 of the mobile unit 2
The information transmitted from the antenna A1 via the antenna A1 is received. The received level is input to the comparison circuit 3 and compared with the minimum required received power level, and the difference is determined by the decision unit 4
Entered in. In the deciding device 4, the transmission power control information of the mobile device 2 is thereby generated and transmitted to the transmission power control circuit 5 of the mobile device 2 via the antenna A2 so as to control the gain of the variable gain power amplification circuit 6. It has become.
【０００５】この場合の利得制御の時間的経過を図４に
よって説明する。図４の実線は、比較器３に入力する受
信電力レベルに見合う送信電力レベル８を示し、点線
は、必要最小限の受信電力レベルに見合う送信電力の目
標値７を示している。The time course of gain control in this case will be described with reference to FIG. The solid line in FIG. 4 indicates the transmission power level 8 corresponding to the reception power level input to the comparator 3, and the dotted line indicates the transmission power target value 7 corresponding to the minimum required reception power level.
【０００６】移動機２の送信電力レベル８と送信電力の
目標値７とが、受信電力レベルと必要最小限の受信電力
レベルという形で、比較器３によって比較される。そし
て、必要最小限の受信電力レベルから受信電力レベルを
差し引いた値が判定器４に入力され、その値が正であれ
ば、送信電力レベル８が送信電力の目標値７より低いの
でその場合は、移動機２の送信電力レベルを上げること
が必要で、送信電力制御情報として移動機２の送信電力
制御回路５によって、電力増幅回路６の利得を上げる指
示が出され、移動機２からの送信電力レベル８が一定の
幅Δｘだけ増加される。判定器４の入力値が負であれ
ば、送信電力レベル８が送信電力の目標値７より高くそ
の場合は、送信電力レベル８は一定の幅Δｘだけ減少さ
れる。The transmission power level 8 of the mobile unit 2 and the transmission power target value 7 are compared by the comparator 3 in the form of the reception power level and the minimum required reception power level. Then, a value obtained by subtracting the received power level from the minimum required received power level is input to the determiner 4, and if the value is positive, the transmission power level 8 is lower than the target value 7 of the transmission power. It is necessary to increase the transmission power level of the mobile device 2, and the transmission power control circuit 5 of the mobile device 2 issues an instruction to increase the gain of the power amplifier circuit 6 as the transmission power control information. The power level 8 is increased by a constant width Δx. If the input value of the determiner 4 is negative, the transmission power level 8 is higher than the target value 7 of the transmission power, and in that case, the transmission power level 8 is reduced by a certain width Δx.
【０００７】図４においては、ｔ＝ｔ0 では送信電力レ
ベル８が送信電力の目標値７より低く、受信側では、比
較回路３において必要最低限の受信電力レベルから受信
電力レベルを差し引くので判定器４への入力値は正の値
となる。この場合、移動機２の送信電力レベル８を上げ
る必要があるので、判定器４において移動機２の送信電
力の上昇を指示する情報を生成し、移動機２に対して伝
送する。移動機２ではこの送信電力制御情報を受け取
り、電力増幅回路６に対して出力電力を一定の幅Δｘだ
け上げるように指示する。In FIG. 4, the transmission power level 8 is lower than the transmission power target value 7 at t = t0, and the reception side subtracts the reception power level from the minimum required reception power level in the comparison circuit 3 on the receiving side. The input value to 4 is a positive value. In this case, since it is necessary to raise the transmission power level 8 of the mobile device 2, the determining device 4 generates information for instructing the increase of the transmission power of the mobile device 2 and transmits it to the mobile device 2. The mobile device 2 receives this transmission power control information and instructs the power amplification circuit 6 to increase the output power by a constant width Δx.
【０００８】図４において、ｔ＝ｔ1 では送信電力レベ
ル８が送信電力の目標値７より高いから、送信電力レベ
ル８がΔｘだけ減少せいＳめられる状態を示している。
以降、ｔ＝ｔ2 ，ｔ3 ，ｔ4 ……と同様な処理が行わ
れ、移動機２からの送信電力が制御される。In FIG. 4, at t = t1, the transmission power level 8 is higher than the target value 7 of the transmission power, so that the transmission power level 8 is reduced by Δx.
After that, the same processing as t = t2, t3, t4 ... Is performed, and the transmission power from the mobile device 2 is controlled.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の無線通信装置の送信電力の制御方式にあって
は、図４のｔ12≦ｔ≦ｔ14の区間のように、伝送路の状
態の変化が急激で送信電力の目標値７が時間に対して大
きく変化するような場合でも、送信電力レベル８は僅か
にΔｘだけしか変化しないため、送信電力レベル８が目
標値７の変化に追従できないで、必要な電力を送信でき
ず、移動機２からの情報伝送ができなくなってしまうこ
とがある。However, in such a conventional transmission power control method for a wireless communication device, a change in the state of the transmission line occurs in the section of t12≤t≤t14 in FIG. Even when the target value 7 of the transmission power changes drastically with respect to time, the transmission power level 8 cannot change the target value 7 because the transmission power level 8 changes only by Δx. In some cases, the required power cannot be transmitted, and the mobile device 2 cannot transmit information.
【００１０】これを解決するには、送信電力レベル８の
増加幅Δｘを大きくするか、送信電力の制御をより頻繁
に行うということが考えられる。しかし送信電力レベル
８の増加幅Δｘを大きくすると、ｔ12より前の区間のよ
うに目標値７の変化が少ない場合は、送信電力の制御量
が不必要に大きくなって送信電力レベル８の誤調整が増
大し、受信電力レベルを一定にしたいという目的にも反
することになる。一方送信電力の制御をより頻繁に行っ
た場合は、送信電力制御の情報をより多く伝送する必要
があるので、その伝送のために無線通信の帯域幅を増加
させることになるという問題がある。To solve this, it is conceivable to increase the increment Δx of the transmission power level 8 or to control the transmission power more frequently. However, when the increase width Δx of the transmission power level 8 is increased, the control amount of the transmission power is unnecessarily increased and the transmission power level 8 is erroneously adjusted when the change of the target value 7 is small as in the section before t12. Is increased, which defeats the purpose of keeping the received power level constant. On the other hand, when the transmission power is controlled more frequently, more information on the transmission power control needs to be transmitted, which causes a problem of increasing the bandwidth of wireless communication for the transmission.
【００１１】この発明は、このような従来の課題に着目
してなされたもので、送信電力を目標値にできるだけ追
従させることができ、しかも帯域幅を増加させることが
ない無線通信システムを提供することを目的とする。The present invention has been made in view of such conventional problems, and provides a wireless communication system capable of making the transmission power follow the target value as much as possible and not increasing the bandwidth. The purpose is to
【００１２】[0012]
【課題を解決するための手段】本発明は上記の課題を解
決するための手段として、その構成を、基地局と移動機
とから構成され、前記基地局は前記移動機の送信電力を
制御するための送信電力制御情報を前記移動機に対して
伝送する手段を有し、前記移動機は前記送信電力制御情
報に基づいて前記送信電力を変化させるための送信電力
制御手段を備えた無線通信システムにおいて、一回の前
記送信電力制御情報に基づく送信電力の変化幅を、過去
において変化させた送信電力の変化幅に基づいて決定す
る、送信電力変化幅調整手段を設けることとした。As a means for solving the above problems, the present invention comprises a base station and a mobile unit, and the base station controls the transmission power of the mobile unit. For transmitting transmission power control information to the mobile device, the mobile device including transmission power control means for changing the transmission power based on the transmission power control information. In the above, the transmission power change width adjusting means for determining the change width of the transmission power based on the transmission power control information for one time based on the change width of the transmission power changed in the past is provided.
【００１３】また、基地局と移動機とから構成され、前
記移動機は前記基地局の送信電力を制御するための送信
電力制御情報を前記基地局に対して伝送する手段を有
し、前記基地局は前記送信電力制御情報に基づいて前記
送信電力を変化させるための送信電力制御手段を備えた
無線通信システムにおいて、一回の前記送信電力制御情
報に基づく送信電力の変化幅を、過去において変化させ
た送信電力の変化幅に基づいて決定する、送信電力変化
幅調整手段を設けることとした。The base station and a mobile station are provided, and the mobile station has means for transmitting transmission power control information for controlling the transmission power of the base station to the base station. In a wireless communication system having a transmission power control means for changing the transmission power based on the transmission power control information, the station changes the change width of the transmission power based on the transmission power control information once, in the past. It is decided to provide a transmission power change width adjusting means for determining based on the change width of the transmitted power.
【００１４】[0014]
【作用】一回の送信電力制御情報による送信電力の制御
の変化幅は、送信電力変化幅調整手段により、過去にお
いて変化させた送信電力の変化幅に基づいて決定され、
送信電力変化幅調整手段により制御が行われる。そのた
め、送信電力を目標値にできるだけ追従させることがで
き、しかも無線通信の帯域幅を増加させることなく行う
ことができる。The change width of the transmission power control based on the transmission power control information for one time is determined by the transmission power change width adjusting means based on the change width of the transmission power in the past,
Control is performed by the transmission power change width adjusting means. Therefore, the transmission power can be made to follow the target value as much as possible, and further, it can be performed without increasing the bandwidth of wireless communication.
【００１５】[0015]
【実施例】以下、この発明を図面に基づいて説明する。
図１は本発明の構成を示す無線通信システムのブロック
図で、この無線通信システムは基地局１と移動機２とか
ら構成され、基地局１は比較回路３、判定器４を有して
おり、移動機２は送信電力制御回路５と電力増幅回路６
とを有している点、基地局１で移動機２の電力増幅回路
６からアンテナＡ１を介して送信されてくる情報を受信
しその受信レベルを比較回路３により必要最小限の受信
電力レベルと比較し、判定器４で移動機２の送信電力制
御情報が生成され、アンテナＡ２を介して移動機２の送
信電力制御回路５に送信されて、可変利得の電力増幅回
路６の利得を制御するが、ここまでは図３の従来技術と
同様で、同一部材は同一符号を以て示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram of a wireless communication system showing the configuration of the present invention. This wireless communication system is composed of a base station 1 and a mobile device 2, and the base station 1 has a comparison circuit 3 and a decision unit 4. , The mobile unit 2 has a transmission power control circuit 5 and a power amplification circuit 6
In addition, the base station 1 receives the information transmitted from the power amplification circuit 6 of the mobile device 2 via the antenna A1 and the reception level is set to the minimum required reception power level by the comparison circuit 3. The transmission power control information of the mobile device 2 is generated by the determiner 4 and transmitted to the transmission power control circuit 5 of the mobile device 2 via the antenna A2 to control the gain of the variable gain power amplification circuit 6. However, the process up to this point is the same as that of the conventional technique shown in FIG.
【００１６】本発明においては、移動機２内に、上記の
送信電力制御回路５と電力増幅回路６の他に、送信電力
変化幅調整手段としての利得調整回路９を設け、これに
より送信電力の変化幅を調整するようにしている。In the present invention, in addition to the transmission power control circuit 5 and the power amplification circuit 6 described above, a gain adjusting circuit 9 as a transmission power change width adjusting means is provided in the mobile unit 2, whereby the transmission power I try to adjust the range of change.
【００１７】かかる構成を有するから、利得調整回路９
により、一回の送信電力制御情報に基づく送信電力の変
化幅を、過去において変化させた送信電力の変化幅に基
づいて決定している。即ち、図２に示すように、移動機
２の送信電力の制御は、送信電力の目標値７を設定値と
して、送信電力レベル１０を変化させるようにするが、
図２におけるｔ＝ｔ0 ，ｔ1 ，ｔ2 ，ｔ3 ，ｔ4 ……の
時点で行うようになっており、例えばｔ＝ｔ0 〜ｔ8 で
は送信電力の変化が正負交互に発生しているから、送信
電力の変化幅を小さくする。また、ｔ8 ≦ｔ≦ｔ14の区
間のように、送信電力の変化が同符号で続いた場合は、
送信電力の変化幅を大きくする。こうして、目標値７の
変化が緩やかな場合には、送信電力の制御の変化幅を小
さくして誤調整を少なくすることが可能になり、目標値
７の変化が急峻な場合は、送信電力の制御の変化幅を大
きくして、送信電力レベル１０の目標値７に対する追従
性を向上させる。Because of this structure, the gain adjusting circuit 9
Thus, the variation range of the transmission power based on the transmission power control information for one time is determined based on the variation range of the transmission power changed in the past. That is, as shown in FIG. 2, the transmission power of the mobile device 2 is controlled by changing the transmission power level 10 with the target value 7 of the transmission power as a set value.
2 is performed at the time points t = t0, t1, t2, t3, t4 ... For example, at t = t0 to t8, the change in the transmission power is alternately generated. Reduce the range of change. Further, when the change of the transmission power continues with the same sign as in the section of t8 ≤t≤t14,
Increase the range of change in transmission power. In this way, when the change of the target value 7 is gradual, it is possible to reduce the change width of the control of the transmission power and reduce the erroneous adjustment, and when the change of the target value 7 is steep, The control change width is increased to improve the followability of the transmission power level 10 to the target value 7.
【００１８】なお、上記の実施例では、移動機２の送信
電力を基地局１の比較器３、判定器４で検出し、移動機
２の送信電力を制御するものについて述べたが、上記の
基地局１と移動機２を置き換えて、移動機２に比較器
３、判定器４を置き、基地局１に送信電力制御回路５、
電力増幅回路６及び送信電力の変化幅を調整する利得調
整回路９を設けて、基地局１からの送信電力を制御する
ようにしても、同様の効果を持つものを構成することが
できる。In the above embodiment, the transmission power of the mobile device 2 is detected by the comparator 3 and the determiner 4 of the base station 1 and the transmission power of the mobile device 2 is controlled. The base station 1 and the mobile device 2 are replaced with each other, the mobile device 2 is provided with a comparator 3 and a judging device 4, and the base station 1 is provided with a transmission power control circuit 5,
Even if the power amplification circuit 6 and the gain adjustment circuit 9 that adjusts the variation width of the transmission power are provided to control the transmission power from the base station 1, a configuration having the same effect can be configured.
【００１９】[0019]
【発明の効果】以上説明したように、この発明によれ
ば、一回の前記送信電力制御情報に基づく送信電力の変
化幅を、過去において変化させた送信電力の変化幅に基
づいて決定する、送信電力変化幅調整手段を設けたの
で、目標値の変化が緩やかな場合には、送信電力の制御
の変化幅が小さくして誤調整を少なくし、目標値の変化
が急峻な場合は、送信電力の制御の変化幅を大きくして
追従性を向上させ、送信電力を目標値にできるだけ追従
させることができるようになり、しかもこのように良好
な追従性を、無線通信の帯域幅を増加させることなく得
ることができるという効果を有する。As described above, according to the present invention, the change width of the transmission power based on the transmission power control information for one time is determined based on the change width of the transmission power changed in the past. Since the transmission power change width adjusting means is provided, when the change of the target value is gradual, the change width of the control of the transmission power is reduced to reduce erroneous adjustment, and when the change of the target value is steep, the transmission power is changed. By increasing the variation range of the power control to improve the followability, it becomes possible to make the transmission power follow the target value as much as possible, and further, such good followability increases the bandwidth of wireless communication. It has an effect that it can be obtained without any.
【図１】本発明の構成を示す無線通信システムの実施例
のブロック図FIG. 1 is a block diagram of an embodiment of a wireless communication system showing the configuration of the present invention.
【図２】本発明の実施例の動作を示す送信電力レベルの
時間的変化を示す特性図FIG. 2 is a characteristic diagram showing a temporal change of a transmission power level showing the operation of the embodiment of the present invention.
【図３】従来の無線通信システムの送信電力制御手段の
ブロック図FIG. 3 is a block diagram of transmission power control means of a conventional wireless communication system.
【図４】従来の送信電力制御手段の送信電力レベルの時
間的変化を示す特性図FIG. 4 is a characteristic diagram showing a temporal change of a transmission power level of a conventional transmission power control means.
１ 基地局 ２ 移動機 ３ 比較回路 ４ 判定器 ５ 送信電力制御回路 ９ 利得調整回路（送信電力変化幅調整手段） 1 Base Station 2 Mobile Station 3 Comparison Circuit 4 Judgment Device 5 Transmission Power Control Circuit 9 Gain Adjustment Circuit (Transmission Power Change Range Adjustment Means)
Claims (2)
地局は前記移動機の送信電力を制御するための送信電力
制御情報を前記移動機に対して伝送する制御情報伝送手
段を有し、前記移動機は前記送信電力制御情報に基づい
て送信電力を変化させるための送信電力制御手段を備え
て成り、一回の前記送信電力制御情報に基づく送信電力
の変化幅を、過去において変化させた送信電力の変化幅
に基づいて決定する送信電力変化幅調整手段を設けたこ
とを特徴とする無線通信システム。1. A base station and a mobile unit, wherein the base station has control information transmitting means for transmitting transmission power control information for controlling the transmission power of the mobile unit to the mobile unit. The mobile device comprises transmission power control means for changing the transmission power based on the transmission power control information, and changes the range of change in the transmission power based on the transmission power control information once in the past. A wireless communication system comprising: a transmission power change width adjusting unit that determines the change width of the transmission power.
動機は前記基地局の送信電力を制御するための送信電力
制御情報を前記基地局に対して伝送する制御情報伝送手
段を有し、前記基地局は前記送信電力制御情報に基づい
て前記送信電力を変化させるための送信電力制御手段を
備えて成り、一回の前記送信電力制御情報に基づく送信
電力の変化幅を、過去において変化させた送信電力の変
化幅に基づいて決定する送信電力変化幅調整手段を設け
たことを特徴とする無線通信システム。2. A base station and a mobile device, wherein the mobile device has control information transmission means for transmitting transmission power control information for controlling the transmission power of the base station to the base station. The base station comprises transmission power control means for changing the transmission power based on the transmission power control information, and changes the range of change of the transmission power based on the transmission power control information once in the past. A wireless communication system, comprising: a transmission power variation width adjusting unit that determines the variation range of the transmission power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6073196A JPH07283783A (en) | 1994-04-12 | 1994-04-12 | Radio communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6073196A JPH07283783A (en) | 1994-04-12 | 1994-04-12 | Radio communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07283783A true JPH07283783A (en) | 1995-10-27 |
Family
ID=13511157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6073196A Pending JPH07283783A (en) | 1994-04-12 | 1994-04-12 | Radio communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07283783A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5924043A (en) * | 1996-10-18 | 1999-07-13 | Mitsubishi Denki Kabushiki Kaisha | Method and apparatus for controlling transmission power in a cellular mobile communication system |
| JP2001512950A (en) * | 1997-08-07 | 2001-08-28 | クゥアルコム・インコーポレイテッド | Method and apparatus for controlling prediction parameter by loop delay |
| US6804531B2 (en) | 2000-03-15 | 2004-10-12 | Nec Corporation | Closed loop power control with adjustable width based on channel quality |
| JP2005006278A (en) * | 2003-06-12 | 2005-01-06 | Sk Telecom Kk | Power allocation apparatus and method for packet data services in mobile communication systems |
| JP2007135226A (en) * | 1998-03-26 | 2007-05-31 | Mitsubishi Electric Corp | Communication method and mobile station |
| JP2012525770A (en) * | 2009-04-27 | 2012-10-22 | エアビクティ インコーポレイテッド | Automatic gain control in personal navigation equipment. |
-
1994
- 1994-04-12 JP JP6073196A patent/JPH07283783A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5924043A (en) * | 1996-10-18 | 1999-07-13 | Mitsubishi Denki Kabushiki Kaisha | Method and apparatus for controlling transmission power in a cellular mobile communication system |
| JP2001512950A (en) * | 1997-08-07 | 2001-08-28 | クゥアルコム・インコーポレイテッド | Method and apparatus for controlling prediction parameter by loop delay |
| JP2010213311A (en) * | 1997-08-07 | 2010-09-24 | Qualcomm Inc | Method and apparatus for predictive parameter control with loop delay |
| JP4739514B2 (en) * | 1997-08-07 | 2011-08-03 | クゥアルコム・インコーポレイテッド | Prediction parameter control method and apparatus using loop delay |
| JP2011250438A (en) * | 1997-08-07 | 2011-12-08 | Qualcomm Incorporated | Method and apparatus for predictive parameter control with loop delay |
| JP2007135226A (en) * | 1998-03-26 | 2007-05-31 | Mitsubishi Electric Corp | Communication method and mobile station |
| JP2008104211A (en) * | 1998-03-26 | 2008-05-01 | Mitsubishi Electric Corp | Communication method, mobile communication system, and base station |
| US6804531B2 (en) | 2000-03-15 | 2004-10-12 | Nec Corporation | Closed loop power control with adjustable width based on channel quality |
| JP2005006278A (en) * | 2003-06-12 | 2005-01-06 | Sk Telecom Kk | Power allocation apparatus and method for packet data services in mobile communication systems |
| JP4565444B2 (en) * | 2003-06-12 | 2010-10-20 | エスケーテレコム株式会社 | Power allocation apparatus and method for packet data service in a mobile communication system {PowerAllocationApparatus and MethodforPacketDataServicesInMobileCommunicationSystems} |
| JP2012525770A (en) * | 2009-04-27 | 2012-10-22 | エアビクティ インコーポレイテッド | Automatic gain control in personal navigation equipment. |
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