JP2944459B2 - Transmission power control method in mobile communication system - Google Patents
Transmission power control method in mobile communication systemInfo
- Publication number
- JP2944459B2 JP2944459B2 JP7107087A JP10708795A JP2944459B2 JP 2944459 B2 JP2944459 B2 JP 2944459B2 JP 7107087 A JP7107087 A JP 7107087A JP 10708795 A JP10708795 A JP 10708795A JP 2944459 B2 JP2944459 B2 JP 2944459B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- control channel
- uplink
- base station
- downlink
- 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.)
- Expired - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 title claims description 81
- 238000000034 method Methods 0.000 title claims description 13
- 238000010295 mobile communication Methods 0.000 title claims description 6
- 230000005684 electric field Effects 0.000 claims description 29
- 238000005259 measurement Methods 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、基地局と移動機との間
で無線通信を行う移動通信システムにおいて、送信時の
電力を制御する送信電力制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission power control method for controlling transmission power in a mobile communication system for performing wireless communication between a base station and a mobile station.
【０００２】[0002]
【従来の技術】従来、例えば次の公報に記載のような送
信電力制御方法が知られている。 特開平５−２４４０５６号公報 送信局の送信機から送信された信号のビット誤り率を検
出し、このビット誤り率が、第一の閾値以下の場合には
送信機の送信電力を予め定めた量だけ減少させ、第一の
閾値より大きい第二の閾値以上の場合には送信電力を予
め定めた量だけ増加させる。 特開平３−２３１５２３号公報 複数の発信制御チャネル毎に移動局がアクセスする送信
電力の最大値及び最小値を予め移動局に報知しておき、
移動局は発信時に最小の送信電力で発信制御チャネルに
よりアクセスを行い、無線基地と制御信号の交信が不成
功であった場合、移動局は送信電力の最大値まで順次段
階的に送信電力を上げてアクセスを行う。 特開昭５８−１７８６３７号公報 無線基地局が移動体に対し送信電力を制御するのに合わ
せて、無線基地局の送信電力も同時に制御する。2. Description of the Related Art Conventionally, a transmission power control method as described in, for example, the following publication is known. SUMMARY OF THE INVENTION A bit error rate of a signal transmitted from a transmitter of a transmitting station is detected, and when the bit error rate is equal to or less than a first threshold, the transmission power of the transmitter is set to a predetermined amount. And if it is greater than or equal to a second threshold greater than the first threshold, the transmission power is increased by a predetermined amount. SUMMARY OF THE INVENTION The maximum value and the minimum value of the transmission power accessed by the mobile station for each of a plurality of transmission control channels are reported to the mobile station in advance,
The mobile station accesses the transmission control channel with the minimum transmission power at the time of transmission, and if the communication between the radio base station and the control signal is unsuccessful, the mobile station sequentially increases the transmission power up to the maximum transmission power. Access. As the radio base station controls the transmission power for the mobile unit, the transmission power of the radio base station is controlled at the same time.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の方法
は、上り及び下り通話チャネルの初期設定電力はある決
まった固定値となっており、通話チャネルに移行した
後、適切な送信電力に安定させるために電力制御を行っ
ているもので、その補正を繰り返し行う必要があった。However, in the conventional method, the initial setting power of the uplink and downlink traffic channels has a fixed fixed value, and after shifting to the traffic channel, the transmission power is stabilized at an appropriate level. Therefore, power control is performed, and it is necessary to repeat the correction.
【０００４】本発明の目的は、通話チャネルを設定する
前に、通話に適切な送信電力を決定して事後の送信電力
の補正を不要とし、基地局及び移動機の負荷を軽減する
とともに、必要以上の電力を送信することによるチャネ
ル間の干渉の発生も防止でき、且つ無線状態が不安定な
場所にいる移動機にも適切な初期送信電力を設定できる
送信電力制御方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to determine the appropriate transmission power for a call before setting a communication channel, to eliminate the need for subsequent correction of the transmission power, to reduce the load on the base station and the mobile station, and to reduce the load. It is an object of the present invention to provide a transmission power control method that can prevent the occurrence of interference between channels due to the transmission of the above power and that can set an appropriate initial transmission power even for a mobile station located in a place where the wireless state is unstable. .
【０００５】[0005]
【課題を解決するための手段】本発明の送信電力制御方
法は、上り通話チャネルの初期送信電力及び下り通話チ
ャネルの初期送信電力を次のようなステップで決定す
る。According to the transmission power control method of the present invention, the initial transmission power of the uplink traffic channel and the initial transmission power of the downlink traffic channel are determined in the following steps.
【０００６】移動機からの上り制御チャネルの電界強度
及びビット誤り率を基地局側で複数回測定する第１のス
テップ。基地局からの下り制御チャネルの電界強度及び
ビット誤り率を移動機側で複数回測定し、その測定結果
を前記上り制御チャネルにより基地局へ報告する第２の
ステップ。基地局において、上り制御チャネルの測定さ
れた複数回の電界強度及びビット誤り率のそれぞれの平
均を求め、その両方の平均値から上り初期送信電力を算
出する第３のステップ。基地局において、報告された下
り制御チャネルの複数回の電界強度及びビット誤り率の
それぞれの平均を求め、その両方の平均値から下り初期
送信電力を算出する第４のステップ。算出された上り初
期送信電力を前記下り制御チャネルによって移動機へ報
告する第５のステップ。移動機において、報告された上
り初期送信電力を、制御チャネルから通話チャネルへの
移行時に、上り通話チャネルの初期送信電力として上り
通話チャネルを設定する第６のステップ。基地局におい
て、算出された下り初期送信電力を、制御チャネルから
通話チャネルへの移行時に、下り通話チャネルの初期送
信電力として下り通話チャネルを設定する第７のステッ
プ。A first step in which the base station measures the electric field strength and the bit error rate of the uplink control channel from the mobile station a plurality of times. A second step of measuring the electric field strength and the bit error rate of the downlink control channel from the base station a plurality of times on the mobile device side, and reporting the measurement result to the base station via the uplink control channel. A third step of calculating, in the base station, an average of each of the measured electric field strengths and bit error rates of the uplink control channel for a plurality of times, and calculating an uplink initial transmission power from both average values; A fourth step in which the base station calculates the average of each of the electric field strengths and the bit error rates of the reported downlink control channel a plurality of times, and calculates the initial downlink transmission power from both average values. A fifth step of reporting the calculated uplink initial transmission power to the mobile station via the downlink control channel. A sixth step of setting the reported uplink initial transmission power in the mobile station as the initial transmission power of the uplink traffic channel when the control channel shifts to the traffic channel; A seventh step in which the base station sets the downlink communication channel as the initial transmission power of the downlink communication channel using the calculated downlink initial transmission power when shifting from the control channel to the communication channel.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１に、本発明に係る送信電力制御方法を
適用する移動通信システムの概要を示す。基地局１と各
移動機２とは、従来と同様に移動機２から基地局１への
上り制御チャネル１０、基地局１から移動機２への下り
制御チャネル１１、移動機２から基地局１への上り通話
チャネル１２、基地局１から移動機２への下り通話チャ
ネル１４を設定して交信できるようになっている。基地
局１には、従来の装備の他に、上り制御チャネル測定装
置３と初期送信電力算出装置４と初期送信電力設定装置
５とが備えられ、また各移動機２には、下り制御チャネ
ル測定装置６及び初期送信電力設定装置７が備えられて
いる。基地局１には交換機８が有線で接続されている。FIG. 1 shows an outline of a mobile communication system to which a transmission power control method according to the present invention is applied. The base station 1 and each mobile station 2 are connected to the uplink control channel 10 from the mobile station 2 to the base station 1, the downlink control channel 11 from the base station 1 to the mobile station 2, and the mobile station 2 to the base station 1 in the same manner as in the prior art. An uplink communication channel 12 to the mobile station 2 and a downlink communication channel 14 from the base station 1 to the mobile station 2 are set and communication is possible. The base station 1 includes, in addition to the conventional equipment, an uplink control channel measurement device 3, an initial transmission power calculation device 4, and an initial transmission power setting device 5, and each mobile device 2 has a downlink control channel measurement device. A device 6 and an initial transmission power setting device 7 are provided. An exchange 8 is connected to the base station 1 by wire.
【０００９】上り制御チャネル測定装置３は、上り制御
チャネル１０の無線状態、つまり電界強度及びビット誤
り率を測定し、下り制御チャネル測定装置６は、下り制
御チャネル１１の無線状態、つまり電界強度及びビット
誤り率を測定する。初期送信電力算出装置４は、上り制
御チャネル測定装置３によって測定された電界強度及び
ビット誤り率から上り初期送信電力を算出するととも
に、下り制御チャネル測定装置６により測定されて移動
機２より報告された電界強度及びビット誤り率から下り
初期送信電力を算出する。基地局１の初期送信電力設定
装置５は、初期送信電力算出装置４により算出された下
り初期送信電力に従って下り通話チャネル１３の初期送
信電力を設定する。移動機２の初期送信電力設定装置７
は、初期送信電力算出装置４により算出されて基地局１
より報告された上り初期送信電力に従って上り通話チャ
ネル１２の初期送信電力を設定する。The uplink control channel measuring device 3 measures the radio condition of the uplink control channel 10, that is, the electric field strength and the bit error rate, and the downlink control channel measuring device 6 measures the radio condition of the downlink control channel 11, that is, the electric field intensity and the bit error rate. Measure the bit error rate. The initial transmission power calculation device 4 calculates the initial transmission power from the electric field strength and the bit error rate measured by the uplink control channel measurement device 3, and is measured by the downlink control channel measurement device 6 and reported by the mobile device 2. The initial downlink transmission power is calculated from the obtained electric field strength and bit error rate. The initial transmission power setting device 5 of the base station 1 sets the initial transmission power of the downlink communication channel 13 according to the downlink initial transmission power calculated by the initial transmission power calculation device 4. Initial transmission power setting device 7 for mobile device 2
Is calculated by the initial transmission power calculation device 4 and the base station 1
The initial transmission power of the uplink communication channel 12 is set according to the reported uplink initial transmission power.
【００１０】図２のフローチャートは、図１に示した移
動通信システムにおいて、本発明による方法により送信
電力を制御されて通話が開始するまでの動作を示す。図
２において、下り制御チャネル１１及び上り制御チャネ
ル１２が設定されると（ステップＳ１及びＳ２）、基地
局１の上り制御チャネル測定装置３によって上り制御チ
ャネル１０の電界強度及びビット誤り率が複数回測定さ
れ（ステップＳ３）、また移動機２の下り制御チャネル
測定装置６によって下り制御チャネル１１の電界強度及
びビット誤り率が複数回測定され、その測定結果は上り
制御チャネル１０によって基地局１へ報告される（ステ
ップＳ４）。FIG. 2 is a flow chart showing the operation of the mobile communication system shown in FIG. 1 until the transmission power is controlled by the method according to the present invention and a call starts. In FIG. 2, when the downlink control channel 11 and the uplink control channel 12 are set (steps S1 and S2), the electric field strength and the bit error rate of the uplink control channel 10 are increased by the uplink control channel measuring device 3 of the base station 1 a plurality of times. It is measured (step S3), and the electric field strength and the bit error rate of the downlink control channel 11 are measured a plurality of times by the downlink control channel measuring device 6 of the mobile station 2, and the measurement results are reported to the base station 1 by the uplink control channel 10. Is performed (step S4).
【００１１】図３は、上り制御チャネル１０の電界強度
及びビット誤り率をそれぞれ５回ずつ測定した測定例を
示す。この測定例では、電界強度は変化しているが、ビ
ット誤り率については５回とも同じ「０．１」となって
いる。図４は、上り制御チャネル１０の電界強度及びビ
ット誤り率をそれぞれ５回ずつ測定した別の測定例を示
す。この測定例では、電界強度及びビット誤り率の両方
とも変化している。図５は、下り制御チャネル１１の電
界強度及びビット誤り率をそれぞれ５回ずつ測定した測
定例を示す。この測定例では、電界強度は変化している
が、ビット誤り率については５回とも同じ「０．１」と
なっている。図６は、下り制御チャネル１１の電界強度
及びビット誤り率をそれぞれ５回ずつ測定した別の測定
例を示す。この測定例では、電界強度及びビット誤り率
の両方とも変化している。FIG. 3 shows a measurement example in which the electric field strength and the bit error rate of the uplink control channel 10 are measured five times each. In this measurement example, the electric field strength is changed, but the bit error rate is the same “0.1” in all five measurements. FIG. 4 shows another measurement example in which the electric field strength and the bit error rate of the uplink control channel 10 are each measured five times. In this measurement example, both the electric field strength and the bit error rate change. FIG. 5 shows a measurement example in which the electric field strength and the bit error rate of the downlink control channel 11 are measured five times each. In this measurement example, the electric field strength is changed, but the bit error rate is the same “0.1” in all five measurements. FIG. 6 shows another measurement example in which the electric field strength and the bit error rate of the downlink control channel 11 are measured five times each. In this measurement example, both the electric field strength and the bit error rate change.
【００１２】次に、基地局１の初期送信電力設定装置５
は、上り制御チャネル測定装置３によって複数回測定さ
れた上り制御チャネル１０の電界強度及びビット誤り率
のそれぞれの平均を求め、その平均値から上り初期送信
電力を算出する（ステップＳ５）。この場合、例えばル
ックアップテーブル方式により送信電力変換表に当ては
めれば、平均値に対応する上り初期送信電力を容易に求
めることができる。Next, the initial transmission power setting device 5 of the base station 1
Calculates the average of each of the electric field strength and the bit error rate of the uplink control channel 10 measured a plurality of times by the uplink control channel measuring device 3, and calculates the initial uplink transmission power from the average value (step S5). In this case, for example, by applying a lookup table method to the transmission power conversion table, the initial uplink transmission power corresponding to the average value can be easily obtained.
【００１３】また、基地局１の初期送信電力設定装置５
は、移動機２から報告された下り制御チャネル１１の電
界強度及びビット誤り率のそれぞれの平均を求め、その
平均値から下り初期送信電力を上記と同様に算出する
（ステップＳ６）。図５の例の場合、ビット誤り率につ
いては５回の測定とも同じで、５回の電界強度に異常が
ないので全てを有効とし、その平均を求めると「３６」
となる。The initial transmission power setting device 5 of the base station 1
Calculates the average of the electric field strength and the bit error rate of the downlink control channel 11 reported from the mobile station 2, and calculates the initial downlink transmission power from the average in the same manner as described above (step S6). In the case of the example of FIG. 5, the bit error rate is the same for the five measurements, and there is no abnormality in the electric field strength of the five measurements.
Becomes
【００１４】基地局１は、上記のようにして上り初期送
信電力を算出すると、その値を下り制御チャネル１１に
よって移動機２へ報告する（ステップＳ７）。これを受
信した移動機２では、制御チャネルから通話チャネルへ
の移行時に、報告された上り初期送信電力を上り通話チ
ャネル１２の初期送信電力として上り通話チャネル１２
を設定する（ステップＳ８）。また、基地局１は、初期
送信電力設定装置５で上記のように算出された下り初期
送信電力を、制御チャネルから通話チャネルへの移行時
に下り通話チャネル１３の初期送信電力として下り通話
チャネル１３を設定する（ステップＳ９）。そして、こ
のような初期送信電力をもって通話を開始する（ステッ
プ１０）。After calculating the initial uplink transmission power as described above, the base station 1 reports the value to the mobile station 2 via the downlink control channel 11 (step S7). Upon receiving this, the mobile station 2 uses the reported uplink initial transmission power as the initial transmission power of the uplink traffic channel 12 when transitioning from the control channel to the traffic channel.
Is set (step S8). Also, the base station 1 uses the downlink initial transmission power calculated by the initial transmission power setting device 5 as described above as the initial transmission power of the downlink communication channel 13 when shifting from the control channel to the communication channel. It is set (step S9). Then, a call is started with such initial transmission power (step 10).
【００１５】なお、上述の実施例では、ルックアップテ
ーブル方式によって初期送信電力を求めたが、測定した
電界強度及びビット誤り率の両方から初期送信電力を変
換式を用いて算出することもできる。In the above-described embodiment, the initial transmission power is obtained by the look-up table method. However, the initial transmission power can be calculated from both the measured electric field strength and the bit error rate by using a conversion formula.
【００１６】[0016]
【発明の効果】以上説明したように本発明は、通話チャ
ネルの設定前に、移動機から基地局への上り制御チャネ
ル及び基地局から移動機への下り制御チャネルのそれぞ
れについて、電界強度及びビット誤り率をそれぞれ複数
回測定してそれぞれの平均値を求め、両方の平均値から
上り通話チャネルの初期送信電力及び下り通話チャネル
の初期送信電力を決定し、この後、その初期送信電力に
より通話チャネルを確立するので、次のような効果があ
る。As described above, according to the present invention, before setting the communication channel, the electric field strength and the bit strength are set for each of the uplink control channel from the mobile station to the base station and the downlink control channel from the base station to the mobile station. The error rate is measured a plurality of times to determine the average value of each.The initial transmission power of the uplink traffic channel and the initial transmission power of the downlink traffic channel are determined from both average values. Has the following effects.
【００１７】 通話開始前に必要最小の送信電力値が
分かり、通話開始後に適切な送信電力に補正する電力補
正が不要になる。従って、基地局及び移動機の負荷を軽
減でき、また基地局及び移動機の双方とも必要以上の電
力を送信しなくとも良いので、チャネル間の干渉の発生
も防止できる。The minimum required transmission power value can be known before the start of a call, and power correction for correcting transmission power to an appropriate value after the start of a call becomes unnecessary. Therefore, the load on the base station and the mobile device can be reduced, and since both the base station and the mobile device do not need to transmit more power than necessary, the occurrence of interference between channels can be prevented.
【００１８】 電界強度及びビット誤り率のそれぞれ
の変化を判定し、電界強度及びビット誤り率の両方の平
均値から上り通話チャネルの初期送信電力及び下り通話
チャネルの初期送信電力を決定するので、受信レベル
（電界強度）と品質（ビット誤り率）との両方の変化関
係を加味した、しかもその一方の突然の変化に大きく影
響されない適切な初期送信電力を設定することができ
る。Since the respective changes in the electric field strength and the bit error rate are determined, and the initial transmission power of the uplink communication channel and the initial transmission power of the downlink communication channel are determined from the average values of both the electric field strength and the bit error rate, the reception is performed. It is possible to set an appropriate initial transmission power that takes into account both the change relationship between the level (electric field strength) and the quality (bit error rate) and that is not greatly affected by one of the sudden changes.
【図１】本発明の送信電力制御方法を適用する移動通信
システムの一例の概要構成図である。FIG. 1 is a schematic configuration diagram of an example of a mobile communication system to which a transmission power control method of the present invention is applied.
【図２】本発明の送信電力制御方法の一例の動作を示す
フローチャートである。FIG. 2 is a flowchart illustrating an operation of an example of a transmission power control method according to the present invention.
【図３】図１中の上り制御チャネル測定装置で測定され
た上り制御チャネルの無線状態の測定例を示す図であ
る。3 is a diagram illustrating a measurement example of a radio state of an uplink control channel measured by the uplink control channel measuring device in FIG. 1;
【図４】図３の例と同様に測定された上り制御チャネル
の無線状態の別の測定例を示す図である。FIG. 4 is a diagram illustrating another measurement example of the radio state of the uplink control channel measured similarly to the example of FIG. 3;
【図５】図１中の下り制御チャネル測定装置で測定され
た下り制御チャネルの無線状態の測定例を示す図であ
る。5 is a diagram illustrating a measurement example of a radio state of a downlink control channel measured by the downlink control channel measurement device in FIG. 1;
【図６】図５の例と同様に測定された下り制御チャネル
の無線状態の別の測定例を示す図である。FIG. 6 is a diagram illustrating another measurement example of the radio state of the downlink control channel measured similarly to the example of FIG. 5;
１ 基地局 ２ 移動機 ３ 上り制御チャネル測定装置 ４ 初期送信電力算出装置 ５ 初期送信電力設定装置 ６ 下り制御チャネル測定装置 ７ 初期送信電力設定装置 ８ 交換機 Reference Signs List 1 base station 2 mobile station 3 uplink control channel measuring device 4 initial transmission power calculating device 5 initial transmission power setting device 6 downlink control channel measuring device 7 initial transmission power setting device 8 exchange
Claims (1)
及びビット誤り率を基地局側で複数回測定する第１のス
テップと、 基地局からの下り制御チャネルの電界強度及びビット誤
り率を移動機側で複数回測定し、その測定結果を前記上
り制御チャネルにより基地局へ報告する第２のステップ
と、 基地局において、上り制御チャネルの測定された複数回
の電界強度及びビット誤り率のそれぞれの平均を求め、
その両方の平均値から上り初期送信電力を算出する第３
のステップと、 基地局において、報告された下り制御チャネルの複数回
の電界強度及びビット誤り率のそれぞれの平均を求め、
その両方の平均値から下り初期送信電力を算出する第４
のステップと、 算出された上り初期送信電力を前記下り制御チャネルに
よって移動機へ報告する第５のステップと、 移動機において、報告された上り初期送信電力を、制御
チャネルから通話チャネルへの移行時に、上り通話チャ
ネルの初期送信電力として上り通話チャネルを設定する
第６のステップと、 基地局において、算出された下り初期送信電力を、制御
チャネルから通話チャネルへの移行時に、下り通話チャ
ネルの初期送信電力として下り通話チャネルを設定する
第７のステップと、 からなる移動通信システムにおける送信電力制御方法。1. A first step of measuring the electric field strength and bit error rate of an uplink control channel from a mobile station a plurality of times at a base station, and moving the electric field strength and bit error rate of a downlink control channel from the base station. A second step of measuring a plurality of times on the mobile station side and reporting the measurement result to the base station using the uplink control channel; and, in the base station, each of the plurality of measured field strengths and bit error rates of the uplink control channel. Find the average of
A third method of calculating the uplink initial transmission power from the average value of both of them.
In the base station, the average of each of the electric field strength and the bit error rate of the reported downlink control channel is calculated a plurality of times,
The fourth step is to calculate the downlink initial transmission power from the average value of both.
And a fifth step of reporting the calculated uplink initial transmission power to the mobile station via the downlink control channel. In the mobile station, the reported uplink initial transmission power is transmitted to the communication channel from the control channel to the communication channel. A sixth step of setting the uplink communication channel as the initial transmission power of the uplink communication channel, and the base station transmits the calculated initial downlink transmission power to the downlink communication channel during the transition from the control channel to the communication channel. A transmission power control method in a mobile communication system, comprising: a seventh step of setting a downlink communication channel as power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7107087A JP2944459B2 (en) | 1995-04-07 | 1995-04-07 | Transmission power control method in mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7107087A JP2944459B2 (en) | 1995-04-07 | 1995-04-07 | Transmission power control method in mobile communication system |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10029934A Division JP2993561B2 (en) | 1998-02-12 | 1998-02-12 | Transmission power control method in mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08280064A JPH08280064A (en) | 1996-10-22 |
| JP2944459B2 true JP2944459B2 (en) | 1999-09-06 |
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ID=14450148
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| JP7107087A Expired - Fee Related JP2944459B2 (en) | 1995-04-07 | 1995-04-07 | Transmission power control method in mobile communication system |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4175521B2 (en) * | 1997-02-24 | 2008-11-05 | エイ ティ アンド ティ モビリティー ザ セカンド リミテッド ライアビリティ カンパニー | High bandwidth efficiency communication |
| CA2424556C (en) | 1997-04-17 | 2009-11-24 | Ntt Mobile Communications Network Inc. | Base station apparatus of mobile communication system |
| JP3949288B2 (en) | 1997-09-22 | 2007-07-25 | 株式会社東芝 | Gateway device and wireless terminal device |
| JP3109504B2 (en) | 1998-03-27 | 2000-11-20 | 日本電気株式会社 | Cellular system, method for avoiding adjacent frequency interference in cellular system, and mobile station |
| US6266527B1 (en) * | 1998-04-28 | 2001-07-24 | Ericsson Inc. | System and method for measuring power and bit error rate on the up-link and down-link simultaneously |
| JP4090601B2 (en) * | 1998-12-16 | 2008-05-28 | パナソニック コミュニケーションズ株式会社 | Wireless communication apparatus and wireless communication system |
| JP2000349740A (en) * | 1999-06-08 | 2000-12-15 | Matsushita Electric Ind Co Ltd | Transmitter-receiver |
| JP2004187247A (en) * | 2002-10-08 | 2004-07-02 | Matsushita Electric Ind Co Ltd | Base station device and communication terminal device |
| KR100905588B1 (en) | 2005-01-10 | 2009-07-02 | 삼성전자주식회사 | Enhanced Uplink Dedicated Channel Transmission Power Determination Method of UE Supporting Autonomous Transmission in Mobile Communication System Supporting Enhanced Uplink Dedicated Channel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2823034B2 (en) | 1991-12-26 | 1998-11-11 | 日本電気株式会社 | Transmission power control method for mobile communication system |
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|---|---|---|---|---|
| JP2748656B2 (en) * | 1990-06-19 | 1998-05-13 | ソニー株式会社 | Mobile wireless communication method |
| JP2793414B2 (en) * | 1992-03-04 | 1998-09-03 | 日本電気株式会社 | Wireless channel reception status measurement control method |
| JP3192839B2 (en) * | 1993-09-20 | 2001-07-30 | 富士通株式会社 | How to determine initial transmit power |
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1995
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2823034B2 (en) | 1991-12-26 | 1998-11-11 | 日本電気株式会社 | Transmission power control method for mobile communication system |
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|---|---|
| JPH08280064A (en) | 1996-10-22 |
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