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1. US20190053256 - USER TERMINAL, RADIO BASE STATION, AND RADIO COMMUNICATION METHOD

Office United States of America
Application Number 16077699
Application Date 16.02.2017
Publication Number 20190053256
Publication Date 14.02.2019
Publication Kind A1
IPC
H04W 72/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. selection or allocation of wireless resources or wireless traffic scheduling
12Wireless traffic scheduling
H04W 72/04
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. selection or allocation of wireless resources or wireless traffic scheduling
04Wireless resource allocation
H04L 1/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
12by using return channel
16in which the return channel carries supervisory signals, e.g. repetition request signals
18Automatic repetition systems, e.g. van Duuren system
CPC
H04L 1/1861
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
12by using return channel
16in which the return channel carries supervisory signals, e.g. repetition request signals
18Automatic repetition systems, e.g. van Duuren system ; ; ARQ protocols
1829Arrangements specific to the receiver end
1861Physical mapping arrangements
H04W 72/042
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
04Wireless resource allocation
0406involving control information exchange between nodes
042in downlink direction of a wireless link, i.e. towards terminal
H04W 72/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
12Dynamic; Wireless traffic scheduling ; ; Dynamically scheduled allocation on shared channel
Applicants NTT DOCOMO, INC.
Inventors Kazuki TAKEDA
Satoshi NAGATA
Priority Data 2016-029885 19.02.2016 JP
Title
(EN) USER TERMINAL, RADIO BASE STATION, AND RADIO COMMUNICATION METHOD
Abstract
(EN)

In order that a user terminal properly performs communication even when a shortened TTI is applied, a user terminal that performs communication in a second Transmission Time Interval (TTI) having a shorter TTI length than a first TTI, is provided with a reception unit that receives, from a radio base station, first downlink control information transmitted for each first TTI, and second downlink control information transmitted in the second TTI, and a control unit that controls UL transmission in the second TTI based on the first control information and the second control information, in which the control unit controls the UL transmission using the first downlink control information that is received before a predetermined period from the second TTI in which the UL transmission is performed, and the second downlink control information that is included in the first TTI in which the first downlink control information is transmitted.