US 11,903,055 B2Granted

Terminal and communication method for controlling transmission based on transmission density

AssigneeNtt Docomo, Inc.

InventorsRyosuke Osawa, Yuichi Kakishima, Satoshi Nagata

Life of this patent

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Abstract

The user equipment comprises a reception unit configured to receive allocation information of reference signals from a base station apparatus or a first user equipment, the reference signals being used in a device-to-device direct communication; a control unit for determining a device-to-device direct communication signal based on the allocation information of reference signals used in the device-to-device direct communication; and a transmitter configured to transmit the determined device-to-device direct communication signal to a second user equipment, wherein the allocation information of reference signals used in the device-to-device direct communication includes a transmission density of the reference signals used in the device-to-device direct communication.

Claims5

Dependent claims

A terminal comprising:

a reception unit configured to receive allocation information of reference signals from a base station, the reference signals being used in a sidelink communication that is a direct communication between the terminal and another terminal;
a control unit configured to autonomously switch a transmission density in a time domain and a transmission density in a frequency domain of the reference signals, based on the allocation information of the reference signals;
and
a transmitter configured to transmit the reference signals to another terminal, based on the transmission density in the time domain and the transmission density in the frequency domain,
wherein a transmission pattern of the reference signals, the transmission pattern being specified based on the allocation information of the reference signals, includes an interval of resource elements in which the reference signals are allocated in the time domain and the frequency domain in a resource pool.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/261,409Filed 24 Jul 2018
Published: US 2021/0266995 A126 Aug 2021
Granted: 13 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 4/40
Services specially adapted for particular environments, situations or purposes: for vehicles, e.g. vehicle-to-pedestrians [V2P]
H04W 76/14
Connection setup: direct-mode setup
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04L 5/0053
Arrangements for allocating sub-channels of the transmission path: allocation of signalling, i.e. of overhead other than pilot signals