JP5350539B2 - 端末装置、電力制御方法及び集積回路 - Google Patents
端末装置、電力制御方法及び集積回路 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—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, Eb/lo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
-
- 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
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
Description
本実施の形態に係る端末100の構成を図2に示す。図2に示す端末100において、RS生成部101は、RS用系列(SRS。例えば、ZC(Zadoff-Chu)系列)を生成し、生成したRS用系列を位相回転部102に出力する。
データ用SINR測定値=SRS用SINR測定値−(PSRS_OFFSET+Δoffset) (3)
実施の形態1では、端末が、前回送信された上り回線チャネルと今回送信されるSRSとの間の送信時間間隔(経過時間)に応じて、基地局から指示されるオフセット値の補正値を設定する場合について説明した。これに対して、本実施の形態では、端末が、前回送信された上り回線チャネルと今回送信されるSRSとの間の送信電力の変化量に応じて、基地局から指示されるオフセット値の補正値を設定する場合について説明する。
実施の形態1では、端末が、SRSの送信周期に応じて、基地局から指示されるオフセット値の補正値を設定する場合について説明した。これに対して、本実施の形態では、端末が、送信周期が設定されないSRSに対して、基地局から指示されるオフセット値を設定する場合について説明する。
Aperiodic−SRSのオフセット値PSRS_OFFSETの通知範囲:−7.5〜15dB
Periodic−SRSのオフセット値PSRS_OFFSETの通知範囲:−10.5〜12dB
200 基地局
101 RS生成部
102 位相回転部
103 マッピング部
104 IFFT部
105 CP付加部
106,208,301,402,501 オフセット設定部
107 経過時間算出部
108,303,503 オフセット値決定部
109 送信部
110 D/A部
111 送信電力制御部
112 アップコンバート部
113,201 アンテナ
202 受信部
203 CP除去部
204 FFT部
205 デマッピング部
206 巡回シフト量設定部
207 SRS用SINR測定部
209 データ用SINR導出部
210 チャネル品質導出部
302 電力変化量算出部
401 送信処理部
502 SRS種別設定部
Claims (16)
- チャネル品質を推定するための参照信号として、送信間隔の異なる複数の参照信号を生成する参照信号生成部と、
前記複数の参照信号を送信する際の送信電力を制御するためのオフセット値を、前記送信間隔に応じて異なる値に設定するオフセット設定部と、
前記オフセット値に基づいて制御された送信電力で前記参照信号を送信する送信部と、
を備える端末装置。 - 前記オフセット設定部は、前記送信間隔が長いほど前記オフセット値が大きくなるように設定する、
請求項1記載の端末装置。 - 前記複数の参照信号は、送信周期が異なる第1の参照信号と第2の参照信号とを含み、
前記オフセット設定部は、前記第1の参照信号に対するオフセット値と前記第2の参照信号向けのオフセット値とを、前記送信周期に応じて異なる値に設定する、
請求項1記載の端末装置。 - 前記オフセット設定部は、前記送信周期が長いほど前記オフセット値が大きくなるように設定する、
請求項3記載の端末装置。 - 前記オフセット設定部は、基地局から指定された送信電力オフセット値に補正値を加えることによって、前記オフセット値を設定する、
請求項1から4いずれか一項に記載の端末装置。 - 前記複数の参照信号は、周期的に送信される第1の参照信号(Periodic SRS)と非周期的に送信される第2の参照信号(Aperiodic SRS)とを含み、
前記オフセット設定部は、前記第1の参照信号に対する第1のオフセット値と前記第2の参照信号に対する第2のオフセット値とが異なる値となるように、前記オフセット値を設定する、
請求項1記載の端末装置。 - 前記オフセット設定部は、前記第2のオフセット値が前記第1のオフセット値よりも大きくなるように設定する、
請求項6記載の端末装置。 - チャネル品質を推定するための参照信号として、送信間隔の異なる複数の参照信号を生成し、
前記複数の参照信号を送信する際の送信電力を制御するためのオフセット値を、前記送信間隔に応じて異なる値に設定し、
前記オフセット値に基づいて制御された送信電力で前記参照信号を送信する、
参照信号の電力制御方法。 - 前記送信間隔が長いほど前記オフセット値が大きくなるように設定される、
請求項8記載の電力制御方法。 - 前記複数の参照信号は、送信周期が異なる第1の参照信号と第2の参照信号とを含み、
前記第1の参照信号に対するオフセット値と前記第2の参照信号向けのオフセット値とを、前記送信周期に応じて異なる値に設定する、
請求項8記載の電力制御方法。 - 前記送信周期が長いほど前記オフセット値が大きくなるように設定する、
請求項10記載の電力制御方法。 - 前記オフセット値の設定は、基地局から指定された送信電力オフセット値に補正値を加えることによって行われる、
請求項8から11いずれか一項に記載の電力制御方法。 - 前記複数の参照信号は、周期的に送信される第1の参照信号(Periodic SRS)と非周期的に送信される第2の参照信号(Aperiodic SRS)とを含み、
前記第1の参照信号に対する第1のオフセット値と前記第2の参照信号に対する第2のオフセット値とが異なる値となるように、前記オフセット値を設定する、
請求項8記載の電力制御方法。 - 前記第2のオフセット値が前記第1のオフセット値よりも大きくなるように設定する、
請求項13記載の電力制御方法。 - チャネル品質を推定するための参照信号として、送信間隔の異なる複数の参照信号を生成する生成処理と、
前記複数の参照信号を送信する際の送信電力を制御するためのオフセット値を、前記送信間隔に応じて異なる値に設定する設定処理と、
前記オフセット値にもとづいて制御された送信電力で前記参照信号を送信する送信処理と、
を制御する集積回路。 - 前記複数の参照信号は、周期的に送信される第1の参照信号(Periodic SRS)と非周期的に送信される第2の参照信号(Aperiodic SRS)とを含み、
前記設定処理は、前記第1の参照信号に対する第1のオフセット値と前記第2の参照信号に対する第2のオフセット値とが異なる値となるように、前記オフセット値を設定する、
請求項15記載の集積回路。
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