JP2015126414A - ユーザ端末、無線基地局及び無線通信方法 - Google Patents
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Abstract
Description
第1の態様では、無線基地局からのCSIリクエスト(トリガ)に応じて、ユーザ端末がCSI(CSIプロセス)をフィードバックする場合(非周期的CSIフィードバック)について説明する。
第2の態様では、ユーザ端末から周期的にCSIのフィードバックを行う場合(周期的CSIフィードバック)について説明する。
以下、本実施の形態に係る無線通信システムの構成について説明する。この無線通信システムでは、上記第1の態様、第2の態様に係る無線通信方法が適用される。なお、上記第1の態様、第2の態様に係る無線通信方法は、それぞれ単独で適用してもよいし、組み合わせて適用してもよい。
10…無線基地局
11…無線基地局(マクロ基地局)
12、12a、12b、12c…無線基地局(スモール基地局)
20…ユーザ端末
30…上位局装置
40…コアネットワーク
101…送受信アンテナ
102…アンプ部
103…送受信部
104…ベースバンド信号処理部
105…呼処理部
106…伝送路インタフェース
201…送受信アンテナ
202…アンプ部
203…送受信部
204…ベースバンド信号処理部
205…アプリケーション部
301…制御部(スケジューラ)
302…テーブル選択部
303…データ信号生成部
304…制御信号生成部
305…CSI−RS生成部
306…CSI取得部(判断部)
401…下り制御信号復号部
402…下りデータ信号復号部
403…チャネル推定部
404…判断部
405…フィードバック制御部(制御部)
Claims (10)
- 複数のセルと協調送信を行うユーザ端末であって、
複数の希望信号電力測定用リソース及び干渉信号電力測定用リソースを用いてチャネル推定を行う推定部と、
所定の希望信号電力測定用リソースの推定結果と干渉信号電力測定用リソースの推定結果が組み合わされたCSIプロセスに関する情報が少なくとも規定されたテーブルを利用して、CSIプロセスのフィードバックを制御する制御部と、を有し、
前記制御部は、異なるCSIプロセスに関する情報がそれぞれ規定された複数のテーブルを切り替えて利用することを特徴とするユーザ端末。 - 前記推定部は、ユーザ端末に設定された希望信号電力測定用リソースにおける受信電力と、干渉信号電力測定用リソースにおける受信電力を測定することを特徴とする請求項1に記載のユーザ端末。
- 下り制御信号に含まれるチャネル状態情報の報告要求に基づいて、CSIプロセスを非周期的にフィードバックする場合、前記制御部は、複数のビット値に対してそれぞれ異なるCSIプロセスに関する情報が規定されたテーブルを利用することを特徴とする請求項1に記載のユーザ端末。
- CSIプロセスを周期的にフィードバックする場合、前記制御部は、CSIプロセスをフィードバックする上り制御チャネルリソースに対してそれぞれ異なるCSIプロセスに関する情報が規定されたテーブルを利用することを特徴とする請求項1に記載のユーザ端末。
- 前記制御部は、CSIプロセスを非周期的にフィードバックする場合と、CSIプロセスを非周期的にフィードバックする場合において、異なるCSIプロセスが設定されたテーブルを利用することを特徴とする請求項1に記載のユーザ端末。
- 前記推定部は、フィードバックするCSIプロセスの内容に関わらず、各テーブルに規定されたCSIプロセスを生成することを特徴とする請求項3又は請求項4に記載のユーザ端末。
- 前記制御部は、下りリンク信号に含まれるテーブル切り替え要求信号に基づいて、テーブルの切り替えを制御することを特徴とする請求項1から請求項6のいずれかに記載のユーザ端末。
- 前記制御部は、下りリンク信号に含まれるテーブル切り替え要求信号を受信した後、所定期間後にCSIプロセスを周期的にフィードバックする場合に適用するテーブルを切り替えることを特徴とする請求項4に記載のユーザ端末。
- 他の無線基地局と協調してユーザ端末と通信を行う無線基地局であって、
前記ユーザ端末に対して、希望信号電力測定用リソース及び干渉信号電力測定用リソースに関する情報と、前記ユーザ端末がCSIプロセスのフィードバックに利用するテーブルに関する情報を送信する送信部と、
前記ユーザ端末から送信されるCSIプロセスを受信する受信部と、
前記ユーザ端末に通知したテーブルに関する情報に基づいて、受信したCSIプロセスを判断する判断部と、を有することを特徴とする無線基地局。 - 複数のセルと協調送信を行うユーザ端末の無線通信方法であって、
複数の希望信号電力測定用リソース及び干渉信号電力測定用リソースを用いてチャネル推定を行う工程と、所定の希望信号電力測定用リソースの推定結果と干渉信号電力測定用リソースの推定結果が組み合わされたCSIプロセスに関する情報が少なくとも規定されたテーブルを利用して、CSIプロセスのフィードバックを行う工程と、を有し、
前記ユーザ端末は、下りリンク信号に含まれるテーブル切り替え用の情報に基づいて、異なるCSIプロセスに関する情報がそれぞれ規定された複数のテーブルを切り替えて利用することを特徴とする無線通信方法。
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JP2013270120A JP6442140B2 (ja) | 2013-12-26 | 2013-12-26 | ユーザ端末、無線基地局及び無線通信方法 |
US15/107,472 US20160323078A1 (en) | 2013-12-26 | 2014-12-10 | User terminal, radio base station and radio communication method |
PCT/JP2014/082720 WO2015098529A1 (ja) | 2013-12-26 | 2014-12-10 | ユーザ端末、無線基地局及び無線通信方法 |
EP14874718.1A EP3089507A4 (en) | 2013-12-26 | 2014-12-10 | User terminal, wireless base station, and wireless communication method |
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JPWO2017077753A1 (ja) * | 2015-11-05 | 2018-08-16 | ソニー株式会社 | 装置及び方法 |
WO2022239362A1 (ja) * | 2021-05-13 | 2022-11-17 | ソニーグループ株式会社 | 基地局、通信装置及び通信方法 |
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EP3132633B1 (en) | 2014-04-16 | 2019-03-20 | LG Electronics Inc. | Method and apparatus for processing aperiodic channel state information in wireless communication system |
KR102110326B1 (ko) * | 2014-06-18 | 2020-05-13 | 한국전자통신연구원 | 이종 네트워크 환경에서의 자원 할당 방법 및 그 장치 |
US10469236B2 (en) * | 2015-05-12 | 2019-11-05 | Lg Electronics Inc. | Method for reporting channel state in wireless communication system and apparatus therefor |
CN109644068B (zh) | 2016-03-27 | 2020-04-21 | 欧芬诺有限责任公司 | 无线网络中的信道状态信息传输 |
KR102641363B1 (ko) * | 2017-11-15 | 2024-02-27 | 엘지전자 주식회사 | 무선 통신 시스템에서 단말의 비주기적 채널 상태 정보 전송 방법 및 상기 방법을 이용하는 단말 |
WO2020003475A1 (ja) * | 2018-06-28 | 2020-01-02 | 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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WO2013021556A1 (ja) * | 2011-08-05 | 2013-02-14 | パナソニック株式会社 | 端末、基地局、送信方法および受信方法 |
US9363780B2 (en) * | 2011-08-12 | 2016-06-07 | Intel Corporation | System and method of uplink power control in a wireless communication system |
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CN103703712B (zh) * | 2013-09-11 | 2017-09-29 | 华为技术有限公司 | 配置信道状态信息参考信号的方法和基站 |
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US20160323078A1 (en) | 2016-11-03 |
EP3089507A4 (en) | 2017-08-02 |
JP6442140B2 (ja) | 2018-12-19 |
EP3089507A1 (en) | 2016-11-02 |
WO2015098529A1 (ja) | 2015-07-02 |
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