JP2014053936A - 無線通信装置および無線通信方法 - Google Patents
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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
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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
- H04L5/005—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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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
【解決手段】設定部105は、LTE+端末のみで用いる参照信号の配置パターンに基づいて、LTE+端末のみで用いる参照信号を配置するリソースブロックをサブフレーム毎に設定する。配置部106は、アンテナ110−1〜110−4にマッピングされたシンボルにおいて、LTE端末およびLTE+端末の双方で用いるセル固有参照信号を1フレーム内のすべてのリソースブロックに配置する。一方、配置部106は、アンテナ110−5〜110−8にマッピングされたシンボルにおいて、設定部105から入力される設定結果に基づいて、LTE+端末のみで用いるセル固有参照信号を、設定された一部のリソースブロックに配置する。
【選択図】図4
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)
- すべてのサブフレームに配置され、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第1の参照信号を受信し、所定のサブフレーム間隔で一部のサブフレームに配置され、前記第2の端末において用いられる第2の参照信号を受信する受信部と、
受信された前記第1の参照信号及び前記第2の参照信号に基づいて、CQIを算出する測定部と、
を有し、
前記第2の参照信号は、前記第2の参照信号の一リソースブロックあたりのリソース数が、前記第1の参照信号の一リソースブロックあたりのリソース数よりも少なくなるように、配置されている、
無線通信装置。 - 前記受信部は、データが配置されたリソースブロックに配置された第3の参照信号を受信し、
受信された前記第3の参照信号に基づいて、前記データを復調する復調部、をさらに有する、
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。 - すべてのサブフレームに配置され、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第1の参照信号を受信し、
所定のサブフレーム間隔で一部のサブフレームに配置され、前記第2の端末において用いられる第2の参照信号を受信し、
受信された前記第1の参照信号及び前記第2の参照信号を用いて、CQIを算出する、
無線通信方法であって、
前記第2の参照信号は、前記第2の参照信号の一リソースブロックあたりのリソース数が、前記第1の参照信号の一リソースブロックあたりのリソース数よりも少なくなるように、配置されている、
無線通信方法。 - すべてのサブフレームに配置され、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第1の参照信号を受信する処理と、
所定のサブフレーム間隔で一部のサブフレームに配置され、前記第2の端末において用いられる第2の参照信号を受信する処理と、
受信された前記第1の参照信号及び前記第2の参照信号を用いて、CQIを算出する処理と、
を制御し、
前記第2の参照信号は、前記第2の参照信号の一リソースブロックあたりのリソース数が、前記第1の参照信号の一リソースブロックあたりのリソース数よりも少なくなるように、配置されている、
集積回路。
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