Title:
USER TERMINAL AND WIRELESS COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/021203
Kind Code:
A1
Abstract:
The present invention supports suitable CSI measurement and reporting, even when a shortened transmission time interval (TTI) and/or shortening of processing time have been introduced. The user terminal according to one embodiment communicates in a cell that uses a shortened TTI that has a transmission time interval length that is shorter than 1 ms and/or a cell that controls communications by applying a shortened processing time that is shorter than in existing LTE systems. The terminal device is characterized by having: a measurement unit that measures channel state information (CSI) using a CSI reference resource; and a transmission unit that transmits the CSI in a prescribed subframe. The user terminal is also characterized in that the CSI reference resource is included in a subframe that precedes the prescribed subframe by an amount of time that is shorter than a prescribed time.
Inventors:
TAKEDA KAZUKI (JP)
NAGATA SATOSHI (JP)
WANG LIHUI (CN)
NAGATA SATOSHI (JP)
WANG LIHUI (CN)
Application Number:
PCT/JP2017/026590
Publication Date:
February 01, 2018
Filing Date:
July 24, 2017
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
International Classes:
H04W24/10; H04W72/04
Domestic Patent References:
| WO2014020828A1 | 2014-02-06 |
Other References:
"Views on processing time reduction and related procedures", 3GPP TSG-RAN WG1#85 RL-165214, 23 May 2016 (2016-05-23), XP051096206
LENOVO: "Frame structure design for next radio interface", 3GPP TSG-RAN WG1#84B RL-162742, 11 April 2016 (2016-04-11), XP051079846
HUAWEI ET AL.: "Discussion on CSI feedback for short TTI", 3GPP TSG-RAN WG1#85 RL-164065, 23 May 2016 (2016-05-23), XP051096619
See also references of EP 3493580A4
LENOVO: "Frame structure design for next radio interface", 3GPP TSG-RAN WG1#84B RL-162742, 11 April 2016 (2016-04-11), XP051079846
HUAWEI ET AL.: "Discussion on CSI feedback for short TTI", 3GPP TSG-RAN WG1#85 RL-164065, 23 May 2016 (2016-05-23), XP051096619
See also references of EP 3493580A4
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
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