JP5876561B2 - 無線通信装置および無線通信方法 - Google Patents
無線通信装置および無線通信方法 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- 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
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/0026—Interference mitigation or co-ordination of multi-user interference
- H04J11/003—Interference mitigation or co-ordination of multi-user interference at the transmitter
-
- 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
-
- 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
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
-
- 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
- H04W52/30—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
-
- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Description
本実施の形態に係る基地局100の構成を図4に示す。
本配置方法では、LTE+端末のみで用いるセル固有RSを、1フレーム内の一部のRBのみに配置する。
配置方法1では、同一サブフレームにおいてLTE+端末のみで用いるセル固有RSを1RBに配置したのに対し、本配置方法では、同一サブフレームにおいて、LTE+端末のみで用いるセル固有RSを複数のRBに配置する。
本配置方法では、LTE+端末のみで用いるセル固有RSを、所定のサブフレーム間隔の一部のRBに配置する。
本実施の形態では、実施の形態1の配置方法1〜3をセル環境に応じて切り替えて使用する場合について説明する。
本切り替え方法では、セル内のLTE端末の数に応じて配置方法を切り替える。
本切り替え方法では、セル内のLTE+端末の移動速度に応じて配置方法を切り替える。
Claims (10)
- 第1の通信システムに対応する第1の端末及び第2の通信システムに対応する第2の端末において用いられる、CQIの算出のための第1の参照信号を、第1サブフレーム、第2サブフレーム及び第3サブフレームを含むすべてのサブフレームに配置し、前記第2の端末において用いられる、CQIの算出のための第2の参照信号を、所定のサブフレーム間隔を有する前記第1サブフレーム及び前記第3サブフレームに配置する配置部と、
配置された前記第1の参照信号と配置された前記第2の参照信号とを送信する送信部と、
を有し、
前記第1サブフレーム及び前記第3サブフレームの間の前記第2サブフレームには、前記第2の参照信号は配置されず、
前記第1サブフレーム又は前記第3サブフレームあたりの前記第2の参照信号が配置されるリソース数が、前記第1サブフレーム又は前記第3サブフレームあたりの前記第1の参照信号が配置されるリソース数よりも少ない、
無線通信装置。 - 前記配置部は、前記第2の端末において用いられる、データ信号の復調のための第3の参照信号を、前記データ信号が配置されたリソースブロックに配置し、
前記送信部は、配置された前記第3の参照信号を送信する、
請求項1に記載の無線通信装置。 - 前記第3の参照信号は、端末に固有の参照信号である、
請求項2に記載の無線通信装置。 - 前記第1の参照信号は、セルに固有の参照信号である、
請求項1から3のいずれかに記載の無線通信装置。 - 前記第1の参照信号は、PBCH又は下り制御チャネルの復調に用いられる、
請求項1から4のいずれかに記載の無線通信装置。 - 前記第2の通信システムにおいて前記第2の端末が対応する基地局のアンテナポートの最大数が、前記第1の通信システムにおいて前記第1の端末が対応する基地局のアンテナポートの最大数よりも大きい、
請求項1から5のいずれかに記載の無線通信装置。 - 前記第1の通信システムはLTEであり、前記第2の通信システムはLTE−Advancedである、
請求項1から6のいずれかに記載の無線通信装置。 - 前記第2の参照信号は、セルに固有の参照信号である、
請求項1から7のいずれかに記載の無線通信装置。 - 第1の通信システムに対応する第1の端末及び第2の通信システムに対応する第2の端末において用いられる、CQIの算出のための第1の参照信号を、第1サブフレーム、第2サブフレーム及び第3サブフレームを含むすべてのサブフレームに配置し、
前記第2の端末において用いられる、CQIの算出のための第2の参照信号を、所定のサブフレーム間隔を有する前記第1サブフレーム及び前記第3サブフレームに配置し、
配置された前記第1の参照信号と、配置された前記第2の参照信号とを送信し、
前記第1サブフレーム及び前記第3サブフレームの間の前記第2サブフレームには、前記第2の参照信号は配置されず、
前記第1サブフレーム又は前記第3サブフレームあたりの前記第2の参照信号が配置されるリソース数が、前記第1サブフレーム又は前記第3サブフレームあたりの前記第1の参照信号が配置されるリソース数よりも少ない、
無線通信方法。 - 第1の通信システムに対応する第1の端末及び第2の通信システムに対応する第2の端末において用いられる、CQIの算出のための第1の参照信号を、第1サブフレーム、第2サブフレーム及び第3サブフレームを含むすべてのサブフレームに配置する処理と、
前記第2の端末において用いられる、CQIの算出のための第2の参照信号を、所定のサブフレーム間隔を有する前記第1サブフレーム及び前記第3サブフレームに配置する処理と、
配置された前記第1の参照信号と、配置された前記第2の参照信号とを送信する処理と、
を制御し、
前記第1サブフレーム及び前記第3サブフレームの間の前記第2サブフレームには、前記第2の参照信号は配置されず、
前記第1サブフレーム又は前記第3サブフレームあたりの前記第2の参照信号が配置されるリソース数が、前記第1サブフレーム又は前記第3サブフレームあたりの前記第1の参照信号が配置されるリソース数よりも少ない、
集積回路。
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