JP4685076B2 - 可変マルチレート通信方式の高速適応電力制御 - Google Patents
可変マルチレート通信方式の高速適応電力制御 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/12—Outer and inner loops
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
- H04W52/286—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission during data packet transmission, e.g. high speed packet access [HSPA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/362—Aspects of the step size
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/08—Closed loop power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/10—Open loop power control
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- Computer Networks & Wireless Communication (AREA)
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- Time-Division Multiplex Systems (AREA)
Description
Nij TrCHiとトランスポートフォーマットコンビネーションjとのデータ速度整合前の無線フレームのビット数。
ある。
果的に増大した送信エネルギーの効果と受信データ品質の改善効果がある。
可変干渉を無視する図3の開ループ方式では、SIR目標値が静止点に設定されて所望のデータ品質を得ている。この条件は図1の単一データ速度の例と等価である。しかしながら、多チャンネル可変データ速度方式では、t、NまたはMが変化する場合がある。上述のようにデータの品質基準測定値の改善を得るには実際に必要なエネルギーより多くのエネルギーが送信される。比較的低いデータ速度で動作する外ループは結局改善された信号品質を検出し、次ぎに内ループについてのSIR目標値を下げて送信機電力を下げることで高すぎる信号品質として認識されるものを補償する。一方、送信機11はデータ(所要品質で受信されるべきデータ)を送信するに実際に必要なエネルギーより大きいエネルギーを用いている。開ループ電力制御の送信局が電池駆動の移動装置である場合(3GPP方式の場
合)、不必要な電池電力が消費されてしまう。
N(t)/M(t)
の係数で調整する。
ここで加法項はdBで表される乗算係数である。実際にはスケール係数を発生する際に用いられる付加係数は上式の他の項となり、上式は式2のようになる。
ここで、
PTSは送信局の送信電力レベル(dB)である。
L0は経路損の長期間平均値(dB)であって、経路損推算値Lの動作中平均値である。
ここでDは最終経路損推算値の時間スロットと送信された通信信号の最初の時間スロットとの間となる時間スロットの数であって、時間スロット遅延と呼ばれている。この遅延が時間スロット1個分であれば、αは1である。Dmaxは可能な遅延の最大値である。15個の時間スロットを有するフレームについての通常の値は7である。遅延がDmaxであれば、αは0である。Dmax-allowedは開ループ電力制御を用いるための最大許容時間スロット遅延である。遅延がDmax-allowedを越えると開ループ電力制御はα=0に設定することでオフ状態になる。
50 閉ループ電力制御送信局
30,70 受信局
16,56 受信機
38,78 送信機
14,17,31,39,54,57、71,79 アンテナシステム
15,55 送信電力スケール係数計算装置
18 基準信号電力測定装置
19 経路損失計算装置
27,67 ステップアップ変換器
47,87 ステップダウン変換器
32 干渉電力測定装置
34,73 データ品質測定装置
36、74 SIR目標値計算装置
40 ユーザデータ線
74 公称SIR目標値計算装置
76,88 合成器
Claims (11)
- 時間関数である第1データ信号速度の可変速度信号として処理されるユーザデータに対する閉ループ送信電力制御を有する無線通信システム用の受信局であって、前記第1データ信号速度のユーザデータ信号が伝送に際して前記第1データ信号速度よりも速い第2データ信号速度の伝送データ信号に変換され、送信電力がセットアップ/ダウンに応答してスケール係数を適用することにより調整される受信局であり、
送信局からの前記第2データ信号速度の伝送データ信号を受信し、前記送信局用の前記セットアップ/ダウンコマンドを生成する受信器であって、
受信した伝送データの前記第2データ信号速度を減じて前記第1データ信号速度のユーザデータ信号を生成するデータ信号速度変換器と、
前記ユーザデータ信号のデータ品質を測定するデータ品質測定装置と、
前記ユーザデータ信号のデータ品質の測定結果に基づきセットアップ/ダウンコマンドを計算する回路と、
を備えた受信器
を備え、伝送データ信号の前記第1データ信号速度又は第2データ信号速度の変化がデータ速度変化に関連したデータ品質に基づく調整に先立って補償される第1及び第2データ信号速度の関数として、前記回路がセットアップ/ダウンコマンドを計算するように前記回路と関連する前記データ信号速度変換器が速度データを提供することを特徴とする受信局。 - 前記受信器は、
前記第2データ信号速度の伝送データ信号とともに受信した干渉信号の電力を測定する干渉電力測定装置と、
集められた受信したデータ品質データに基づき、目標SIRデータを出力する前記データ品質測定装置と関連付けられた処理装置と、
を備え、前記回路は、目標信号を含む前記受信信号の測定された干渉電力データを、前記目標SIRデータがデータ速度の変化が生じたときに調整されるように、目標SIRデータに速度係数を掛けることにより計算された干渉率SIRデータと組み合わせることによって前記セットアップ/ダウンコマンドを計算することを特徴とする請求項1に記載の受信局。 - 雑音スペクトル密度比に対する単位ビット当たりの電力が伝送される伝送データ信号において増加する選択されたデータビットの反復により、前記第1データ信号速度のユーザデータ信号を第2データ信号速度の伝送データ信号に変換するデータ信号変換器を有する送信器をさらに備えたことを特徴とする請求項2に記載の受信局。
- 前記送信局から前記第1及び第2データ信号速度で受信したセットアップ/ダウンコマンドの関数としてスケール係数を計算する処理装置を有する送信器をさらに備えたことを特徴とする請求項3に記載の受信局。
- 前記データ信号速度変換器は、反復データビットを加算して、受信した伝送データの第2データ信号速度を減じて、第1データ信号速度のユーザデータ信号を生成することを特徴とする請求項1乃至4のいずれかに記載の受信局。
- 前記送信局としての無線ネットワークの基地局と通信する請求項1乃至5のいずれかに記載された受信局を備えたことを特徴とするユーザ装置。
- 前記送信局としてのユーザ装置と通信する請求項1乃至5のいずれかに記載の受信局を備えたことを特徴とする無線ネットワークの基地局。
- 時間関数である第1データ信号速度のユーザデータが可変速度信号として処理される無線通信システム用の送信電力制御装置を有する送信局であって、前記第1データ信号速度のユーザデータ信号が伝送に際して前記第1データ信号速度よりも速い第2データ信号速度の伝送データ信号に変換され、送信電力がセットアップ/ダウンに応答してスケール係数を適用することにより調整される送信局であり、
前記第1及び第2データ信号速度の関数としてスケール係数を計算する処理装置と、
前記第1データ信号速度のユーザデータ信号を前記第2データ信号速度の伝送データ信号に変換するデータ信号速度変換器と、
伝送の際に計算されたスケール係数と伝送データ信号を結合する結合器と、
を含む送信器を備えたことを特徴とする送信局。 - 雑音スペクトル密度比に対する単位ビット当たりの電力が、伝送される伝送データ信号において増加する選択されたデータビットの反復により、前記送信局が送信している受信局から受信したセットアップ/ダウンコマンドに基づくスケール係数を計算する送信器を備え、前記データ信号速度変換器が、前記第1のデータ信号速度のユーザデータ信号から前記第2データ信号速度の伝送データ信号に変換することを特徴とする請求項8に記載の送信局。
- 前記受信局としての無線ネットワークの基地局と通信する請求項8又は9に記載の送信局を備えたことを特徴とするユーザ装置。
- 前記受信局としてのユーザ装置と通信する請求項8又は9に記載の送信局を備えたことを特徴とする無線ネットワークの基地局。
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EP (2) | EP1701455A3 (ja) |
JP (2) | JP4684530B2 (ja) |
KR (11) | KR101163312B1 (ja) |
CN (5) | CN101047411A (ja) |
AR (1) | AR029990A1 (ja) |
AT (1) | ATE338387T1 (ja) |
AU (1) | AU2001273402A1 (ja) |
BR (1) | BR0113022A (ja) |
CA (2) | CA2569720C (ja) |
DE (6) | DE20121863U1 (ja) |
ES (1) | ES2193897T3 (ja) |
IL (3) | IL154074A0 (ja) |
MX (1) | MXPA03000739A (ja) |
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