# US 12,193,032 B2 · Terminal and radio communication method

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- Number: US 12,193,032 B2
- Document ID: US12193032B2
- Status: Granted
- Kind: B2
- Application number: 17/769,221
- Filed: 2020-10-16
- Published: 2024-04-11
- Granted: 2025-01-07
- Earliest claimed: 2019-10-17
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Yuki Takahashi; Satoshi Nagata; Lihui Wang
- Web page: https://patentgrep.com/patent/US12193032B2

## CPC

- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 72/232: the control data signalling from the physical layer, e.g. DCI signalling
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 8/24: Transfer of terminal data
- H04W 72/51: based on terminal or device properties
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Appropriate PDCCH monitoring is performed even when carrier aggregation is applied. A terminal according to one aspect of the present disclosure includes: a transmitting section that transmits capability information related to the number of downlink cells where Physical Downlink Control Channel (PDCCH) candidates can be monitored; and a control section that determines, based on the capability information, the number of cells where PDCCH monitoring can be performed for New Radio (NR) of a second release, the number of the cells being different from the number of cells where PDCCH monitoring can be performed for NR of a first release.

## Claims

### Claim 1

A terminal comprising:
a transmitter that transmits capability information indicating, in a joint manner, the number of downlink cells capable of physical downlink control channel (PDCCH) monitoring for new radio (NR) of a first release and the number of downlink cells capable of PDCCH monitoring for NR of a second release;
a processor that determines, based on radio resource control (RRC) signaling, that a maximum number of non-overlapped control channel elements (CCEs) per serving cell is a maximum number of non-overlapped CCEs per u and span, for a subcarrier spacing (SCS) configuration of μ≤1; and
a receiver that monitors, based on the maximum number of non-overlapped CCEs per serving cell, PDCCH candidates per span.

### Claim 2

A radio communication method for a terminal, comprising:
transmitting capability information indicating, in a joint manner, the number of downlink cells capable of physical downlink control channel (PDCCH) monitoring for new radio (NR) of a first release and the number of downlink cells capable of PDCCH monitoring for NR of a second release;
determining, based on radio resource control (RRC) signaling, that a maximum number of non-overlapped control channel elements (CCEs) per serving cell is a maximum number of non-overlapped CCEs per u and span, for a subcarrier spacing (SCS) configuration of μ≤1; and
monitoring, based on the maximum number of non-overlapped CCEs per serving cell, PDCCH candidates per span.

### Claim 3

A system comprising a terminal and a base station, wherein
the terminal comprises:
a transmitter that transmits capability information indicating, in a joint manner, the number of downlink cells capable of physical downlink control channel (PDCCH) monitoring for new radio (NR) of a first release and the number of downlink cells capable of PDCCH monitoring for NR of a second release;
a processor that determines, based on radio resource control (RRC) signaling, that a maximum number of non-overlapped control channel elements (CCEs) per serving cell is a maximum number of non-overlapped CCEs per u and span, for a subcarrier spacing (SCS) configuration of μ≤1; and
a receiver that monitors, based on the maximum number of non-overlapped CCEs per serving cell, PDCCH candidates per span, and
the base station comprises a transmitter that transmits the RRC signaling.