Title:
METHOD FOR ADJUSTING MODULATION ENCODING SCHEME, USER EQUIPMENT AND BASE STATION
Document Type and Number:
Japanese Patent JP2016163357
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for adjusting a modulation encoding scheme (MCS), user equipment and a base station, enabling the base station to recognize channel quality deviation estimated in the user equipment, to dynamically adjust the MCS for use at downlink data transmission, to effectively improve MCS accuracy in subsequent transmission and to improve a system throughput and a user throughput.SOLUTION: The method includes the steps of: receiving by user equipment a first downlink data frame transmitted at a first time; estimating a first signal-to-interference noise ratio (SINR) and a first channel quality indicator (CQI), on the basis of the first downlink data frame; estimating a second SINR and a second CQI on the basis of the second downlink data frame transmitted at a second time after the first time; and calculating a MCS variation to feed back to the base station, on the basis of one or a plurality of parameters among the first CQI, the second CQI, the first SINR and the second SINR.SELECTED DRAWING: Figure 1
Inventors:
LAN YANG
LI ANXIN
JIANG HUILING
LI ANXIN
JIANG HUILING
Application Number:
JP2016041363A
Publication Date:
September 05, 2016
Filing Date:
March 03, 2016
Export Citation:
Assignee:
NTT DOCOMO INC
International Classes:
H04W28/18; H04W88/02
Attorney, Agent or Firm:
Hiroyoshi Aoki
Amada Masayuki
Moriya Yoshitaka
Amada Masayuki
Moriya Yoshitaka
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