USER TERMINAL, RADIO BASE STATION AND RADIO COMMUNICATION METHOD

• Main Authors: NAGATA SATOSHI, JIANG HUILING, LIU LIU, TAKEDA KAZUKI, WANG LIHUI
• Format: Patent
• Language: English; Japanese
• Published: 25.05.2017
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION; WIRELESS COMMUNICATIONS NETWORKS

PROBLEM TO BE SOLVED: To appropriately feed back uplink control information even in the case where the number of component carriers that can be set to a user terminal is expanded further than an existing system.SOLUTION: The user terminal comprises: a receiving part for receiving an ACK/NACK resource indicator (ARI: ACK/NACK Resource Indicator); a transmitting part for transmitting uplink control information (UCI: Uplink Control Information) including acknowledgement information with a specific resource while using a specific PUCCH format (PF: Physical Uplink Control Channel Format); and a control part for determining the specific PF and the specific resource based on whether it is set to transmit one or more channel state information (CSI: Channel State Information) items in transmission timing of the UCI, and a payload size of the UCI.SELECTED DRAWING: Figure 14 【課題】ユーザ端末に設定可能なコンポーネントキャリア数が既存システムより拡張される場合であっても、上り制御情報を適切にフィードバックすること。【解決手段】ユーザ端末は、ＡＣＫ／ＮＡＣＫリソース指示子（ＡＲＩ：ACK/NACK Resource Indicator）を受信する受信部と、送達確認情報を含む上り制御情報（ＵＣＩ：Uplink Control Information）を、特定のＰＵＣＣＨフォーマット（ＰＦ：Physical Uplink Control Channel Format）を用いて、特定のリソースで送信する送信部と、ＵＣＩの送信タイミングで１つ以上のチャネル状態情報（ＣＳＩ：Channel State Information）を送信するように設定されているか否かと、ＵＣＩのペイロードサイズと、に基づいて、特定のＰＦ及び特定のリソースを決定する制御部と、を有する。【選択図】図１４