JP2012525022A - 無線通信システムにおいて参照信号を設置する方法およびシステム - Google Patents
無線通信システムにおいて参照信号を設置する方法およびシステム Download PDFInfo
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- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0658—Feedback reduction
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- H—ELECTRICITY
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- 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
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- H—ELECTRICITY
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- 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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
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- 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
【選択図】図19
Description
方法1:干渉信号を送信する基地局(例えば、隣接セルの基地局eNB2および/またはeNB3)においてプリコーディングベクトルデータベースを探索し、各層の干渉リソースブロックの送信信号の全体の波形指向性図に最も合致するプリコーディングベクトルを探し出して、設計した電力感知参照信号のプリコーディングベクトルとする。
Claims (28)
- 無線通信システムにおいて参照信号を設置するための方法であって、前記無線通信システムはサービングセルおよび隣接セルを含み、前記サービングセルの移動端末は同一の時間周波数リソースを用いて、前記サービングセルからサービングリソースブロックを受信するとともに前記隣接セルから干渉リソースブロックを受信し、前記方法は、
前記干渉リソースブロック中にユーザ固有参照信号を設置するステップと、
前記サービングリソースブロック中の、前記干渉リソースブロック上で前記ユーザ固有参照信号が設置されている時間周波数位置と同一の時間周波数位置にパンクチャリングを行って、パンクチャリングされた時間周波数位置ではいかなる信号も伝送しないようにするステップと、を含む方法。 - 請求項1に記載の方法であって、パンクチャリングされた時間周波数位置で、前記ユーザ固有参照信号の電力を、前記隣接セルから受信する干渉電力として測定するステップをさらに含む、方法。
- 請求項1に記載の方法であって、前記干渉リソースブロックは多層であり、前記方法は、前記ユーザ固有参照信号をそのうちの一層に設置し、前記一層以外の他の層の干渉リソースブロックにおける前記ユーザ固有参照信号と同一の時間周波数位置でパンクチャリングを行って、いかなる信号も送信しないようにするステップをさらに含む、方法。
- 請求項1に記載の方法であって、前記サービングリソースブロックおよび各層の前記干渉リソースブロックはそれぞれ複数のリソースユニットからなり、各リソースユニットは異なる時間周波数位置を占有し、それぞれが、制御信号、チャネル状態情報参照信号、復調参照信号、データ信号のうち1つまたは複数を伝送するために用いられる、方法。
- 請求項4に記載の方法であって、前記ユーザ固有参照信号を前記干渉リソースブロック中の前記復調参照信号として設置するステップをさらに含む、方法。
- 請求項4に記載の方法であって、前記ユーザ固有参照信号を前記干渉リソースブロック中の前記復調参照信号以外の新たな復調参照信号として設置するステップをさらに含む、方法。
- 請求項1〜4のいずれかに記載の方法であって、前記ユーザ固有参照信号は電力感知参照信号であり、前記方法は、前記電力感知参照信号の波形指向性図を前記干渉リソースブロック中の全信号の波形指向性図の和として設置するステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記電力感知参照信号を前記干渉リソースブロック中のデータ信号の時間周波数位置に設置するステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記電力感知参照信号を前記干渉リソースブロック中の前記復調参照信号の時間周波数位置に設置するステップをさらに含む、方法。
- 請求項9に記載の方法であって、位置を占有された前記復調参照信号を他の時間周波数位置に設置するステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記電力感知参照信号を前記干渉リソースブロック中のチャネル状態情報参照信号の時間周波数位置に設置するステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記電力感知参照信号の位置を前記干渉リソースブロックの制御区内に設置するステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記電力感知参照信号と前記干渉リソースブロック中のRel−8 RS参照信号の時間周波数位置を互いに離すステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記隣接セルの基地局内でプリコーディングベクトルデータベースを探索し、前記干渉リソースブロックの各層の信号の全体の波形指向性図に最も合致するプリコーディングベクトルを探し出して、前記電力感知参照信号のプリコーディングベクトルとするステップをさらに含む、方法。
- 請求項7に記載の方法であって、符号帳に基づいて各層の信号のプリコーディングベクトルを設置するとともに、前記電力感知参照信号に対応するプリコーディングベクトルを予め記憶するステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記干渉リソースブロックにおける各層の信号の波形指向性図を算出して、各層の波形指向性図を重ね合わせて、前記電力感知参照信号の波形指向性図とするとともに、前記電力感知参照信号の波形指向性図に基づいてスペクトル分解を行って、前記電力感知参照信号のプリコーディングベクトルを取得するステップをさらに含む、方法。
- 請求項3に記載の方法であって、各層の干渉リソースブロックは異なる隣接セルからくる、方法。
- 請求項3に記載の方法であって、各層の干渉リソースブロックは前記隣接セル中の異なる移動端末の信号からくる、方法。
- 請求項7に記載の方法であって、時間周波数が連続した複数の前記干渉リソースブロックにおいて、所定の時間周波数間隔で前記電力感知参照信号を設置するステップをさらに含む、方法。
- 請求項7に記載の方法であって、前記隣接セルが1つより多い際に、各隣接セルの前記電力感知参照信号を多重するステップをさらに含む、方法。
- 請求項2に記載の方法であって、測定された前記隣接セルからの干渉電力が所定の閾値を超えていれば、前記干渉電力を前記サービングセルに報告するステップをさらに含む、方法。
- 無線通信システムであって、サービングセルおよび隣接セルを含み、前記サービングセルの移動端末は同一の時間周波数リソースを用いて、前記サービングセルからサービングリソースブロックを受信するとともに前記隣接セルから干渉リソースブロックを受信し、前記無線通信システムは、
前記干渉リソースブロック中にユーザ固有参照信号を設置する設置装置と、
前記サービングリソースブロック中の、前記干渉リソースブロック上で前記ユーザ固有参照信号が設置されている時間周波数位置と同一の時間周波数位置にパンクチャリングを行って、パンクチャリングされた時間周波数位置ではいかなる信号も伝送しないようにするパンクチャリング装置と、を含む無線通信システム。 - 請求項22に記載の無線通信システムであって、
パンクチャリングされた時間周波数位置で、前記ユーザ固有参照信号の電力を、前記隣接セルから受信する干渉電力として測定する移動端末をさらに含む、無線通信システム。 - 請求項23に記載の無線通信システムであって、前記移動端末は、測定された前記隣接セルからの干渉電力が所定の閾値を超えていれば、前記干渉電力を前記サービングセルに報告する、無線通信システム。
- 請求項8に記載の方法であって、位置を占有された前記データ信号を他の時間周波数位置に設置するステップをさらに含む、方法。
- 請求項13に記載の方法であって、前記Rel−8 RS参照信号はセル固有の参照信号である、方法。
- 請求項13に記載の方法であって、前記Rel−8 RS参照信号はユーザ固有の参照信号である、方法。
- 請求項7に記載の方法であって、前記電力感知参照信号と前記干渉リソースブロック中の物理放送チャネルの時間周波数位置を互いに離すステップをさらに含む、方法。
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JP2012531129A (ja) * | 2009-06-23 | 2012-12-06 | アルカテル−ルーセント | チャネル状態情報のための方法および装置 |
WO2019030934A1 (ja) * | 2017-08-10 | 2019-02-14 | 株式会社Nttドコモ | ユーザ装置、及び測定方法 |
JPWO2019012670A1 (ja) * | 2017-07-13 | 2020-07-02 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
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