User equipments, base stations, and methods

Patent metadata

Field	Value
Publication number	US-12446045-B2
Application number	US-202017764762-A
Country	US
Kind code	B2
Filing date	Oct 2, 2020
Priority date	Oct 3, 2019
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A method for a user equipment (UE) which communicates with a base station in a serving cell is described. The method may comprise acquiring first radio resource control (RRC) information and second RRC information. The first RRC information may indicate one or more slot format combinations. The second RRC information may indicate periodic channel state information (CSI) reporting. The method may also comprise performing a first physical downlink control channel (PDCCH) monitoring if the first RRC information is provided. The first PDCCH monitoring may be monitoring of a first PDCCH with a first downlink control information (DCI) format. The method may further comprise performing the periodic CSI reporting on a physical uplink control channel according to the third RRC information. If the first RRC information is provided and if the first DCI format providing a slot format for a slot is not detected, a transmission of the PUCCH may be performed for a set of symbols of the slot, subject to a channel access procedure.

First claim

The invention claimed is:

1. A user equipment (UE) comprising:
higher layer processing circuitry configured to acquire radio resource control (RRC) information, the RRC information indicating periodic channel state information reference signal (CSI-RS) reception;
physical downlink control channel (PDCCH) receiving circuitry configured to monitor a PDCCH with a downlink control information (DCI) format, the DCI format including an indication of a channel occupancy duration; and
CSI-RS receiving circuitry configured to perform the periodic CSI-RS reception in a plurality of symbols of a slot, wherein
the CSI-RS receiving circuitry is further configured to cancel the periodic CSI-RS reception in the plurality of symbols of the slot in a case that the plurality of symbols of the slot is outside of the channel occupancy duration, and
the channel occupancy duration is determined based on a starting symbol of a starting slot, a slot format of which is signaled by the DCI format.

2. A base station configured to communicate with a terminal apparatus, the base station comprising:
higher layer processing circuitry configured to send radio resource control (RRC) information, the RRC information indicating periodic channel state information reference signal (CSI-RS) reception;
physical downlink control channel (PDCCH) transmitting circuitry configured to transmit a PDCCH with a downlink control information (DCI) format, the DCI format including an indication of a channel occupancy duration; and
CSI-RS transmitting circuitry configured to perform the periodic CSI-RS transmission in a plurality of symbols of a slot, wherein
the periodic CSI-RS reception by the terminal apparatus in the plurality of symbols of the slot is canceled in a case that the plurality of symbols of the slot is outside of the channel occupancy duration, and
the channel occupancy duration is determined based on a starting symbol of a starting slot, a slot format of which is signaled by the DCI format.

3. A method performed by a user equipment (UE), the method comprising:
acquiring radio resource control (RRC) information, the RRC information indicating periodic channel state information reference signal (CSI-RS) reception;
monitoring a physical downlink control channel (PDCCH) with a downlink control information (DCI) format, the DCI format including an indication of a channel occupancy duration;
performing the periodic CSI-RS reception in a plurality of symbols of a slot; and
cancelling the periodic CSI-RS reception in the plurality of symbols of the slot in a case that the plurality of symbols of the slot is outside of the channel occupancy duration, wherein
the channel occupancy duration is determined based on a starting symbol of a starting slot, a slot format of which is signaled by the DCI format.

Assignees

• Sharp Kk

Inventors

• Nogami Toshizo
• Ouchi Wataru
• Lee Taewoo
• Suzuki Shoichi
• Nakashima Daiichiro
• Yoshimura Tomoki
• Lin Huifa

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0091

  Signalling for the administration of the divided path, e.g. signalling of configuration information · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04B7/0626

  Channel coefficients, e.g. channel state information [CSI] · CPC title