# US 10,772,000 B2 · User equipment, base station, and measurement method

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- Number: US 10,772,000 B2
- Document ID: US10772000B2
- Status: Granted
- Kind: B2
- Application number: 16/300,022
- Filed: 2017-03-31
- Published: 2019-05-16
- Granted: 2020-09-08
- Earliest claimed: 2016-05-12
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Hideaki Takahashi; Kazuaki Takeda; Yuta Sagae; Satoshi Nagata
- Web page: https://patentgrep.com/patent/US10772000B2

## CPC

- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04B 17/309: Measuring or estimating channel quality parameters
- H04W 16/28: using beam steering
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 48/12: using downlink control channel
- H04W 36/0094: {Definition of hand-off measurement parameters}
- H04W 48/10: using broadcasted information
- H04W 48/20: Selecting an access point
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 76/40: for selective distribution or broadcast
- H04W 88/08: Access point devices
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

There is provided user equipment of a radio communication system including a base station and the user equipment, the user equipment including a receiver that receives, from the base station, measurement band information indicating a frequency range in which received quality is measured in a system bandwidth; and a measurer that measures the received quality in the frequency range indicated by the measurement band information.

## Claims

### Claim 1

A user equipment comprising:
a receiver that receives, from a base station, measurement band information indicating a frequency in which received quality is to be measured; and
a measurer that measures the received quality in the frequency indicated by the measurement band information,
wherein the measurer derives the received quality based on a synchronization signal on the frequency indicated by the measurement band information.

### Claim 2 (depends on 1)

The user equipment according to claim 1, wherein the measurement band information includes a frequency range.

### Claim 3 (depends on 1)

The user equipment according to claim 1, wherein the receiver receives the measurement band information from the base station through an RRC message in an RRC connected state and receives measurement band information from the base station through broadcast information in an RRC idle state.

### Claim 4 (depends on 1)

The user equipment according to claim 1, wherein, when signals transmitted from a respective plurality of specific antenna ports are received in the frequency indicated by the measurement band information, and when cell IDs included in the respective received signals are identical, the measurer determines that, among the signals with the identical cell IDs, received quality of a signal with high received quality as measured received quality.

### Claim 5

A base station of a radio communication system including the base station and user equipment, the base station comprising:
a communicator that broadcasts, to the user equipment, measurement band information indicating a frequency in which the user equipment is to measure received quality,
wherein the user equipment measures the received quality in the frequency indicated by the measurement band information, and
wherein the user equipment derives the received quality based on a synchronization signal on the frequency indicated by the measurement band information.

### Claim 6

A measurement method which is performed by user equipment, the measurement method comprising:
receiving, from a base station, measurement band information indicating a frequency in which received quality is to be measured; and
measuring the received quality in the frequency indicated by the measurement band information,
wherein the user equipment derives the received quality based on a synchronization signal on the frequency indicated by the measurement band information.

### Claim 7 (depends on 1)

The user equipment according to claim 1, wherein the frequency indicated by the measurement band information is associated with at least one sub-band of a system bandwidth.