# US 12,603,745 B2 · Overhead reduction of pilot reference signals

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,603,745 B2
- Document ID: US12603745B2
- Status: Granted
- Kind: B2
- Application number: 18/273,869
- Filed: 2021-01-26
- Published: 2024-09-12
- Granted: 2026-04-14
- Earliest claimed: 2021-01-26
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Hiroki Harada; Daisuke Kurita; Mayuko Okano; Satoshi Nagata; Masaya Okamura; Tomoya Ohara
- Web page: https://patentgrep.com/patent/US12603745B2

## CPC

- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- 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)
- H04B: TRANSMISSION

## Abstract

A terminal comprises: a reception unit that receives a reference signal used for a purpose other than a measurement related to a reception quality in a physical layer; and a control unit that performs the measurement related to the reception quality in the physical layer using the reference signal.

## Claims

### Claim 1

A terminal comprising:
a receiver that receives a first reference signal used for a measurement related to a reception quality in a physical layer, and a second reference signal having a purpose different from the measurement related to the reception quality in a physical layer; and
a processor that performs the measurement related to the reception quality in the physical layer using the second reference signal in addition to the first reference signal.

### Claim 2 (depends on 1)

The terminal according to claim 1, wherein the reception unit receiver does not periodically receive the first reference signal when a specific condition is satisfied.

### Claim 3 (depends on 2)

The terminal according to claim 2, wherein the specific condition includes a condition that the measurement related to the reception quality in the physical layer is performed using the second reference signal within a specific period.

### Claim 4

A base station comprising:
a transmitter that transmits a first reference signal used a measurement related to a reception quality in a physical layer, and a second reference signal having a purpose different from the measurement related to the reception quality in a physical layer; and
a processor that assumes that a terminal performs the measurement related to the reception quality in the physical layer by using the second reference signal in addition to the first reference signal.

### Claim 5

A radio communication method comprising:
receiving a first reference signal used for a measurement related to a reception quality in a physical layer, and a second reference signal having a purpose different from the measurement related to the reception quality in a physical layer; and
performing the measurement related to the reception quality in the physical layer using the second reference signal in addition to the first reference signal.