US 10,256,962 B2 · Apparatus and method for feeding back channel quality information and scheduling apparatus and method using the same in a wireless communication system

Abstract

An apparatus and method are provided for feeding back channel quality information and performing scheduling using the fed-back channel quality information in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA). In the OFDMA wireless communication system, forward performance degradation due to a decrease in an amount of reverse channel quality information is reduced, and also an increase in the reverse load due to channel quality information feedback is suppressed. A base station controls power of a physical channel using information fed back from a mobile station. In a method for feeding back channel quality information from the mobile station, sub-band-by-sub-band channel quality information is measured and channel-by-channel quality information of a number of channels is transmitted in order of sub-bands of better channel quality information. Average channel quality information for a total band is measured and transmitted.

Claims12

Dependent claims

A method for transmitting channel quality indicator (CQI) information in a wireless communication system, the method comprising:

obtaining, at a mobile station, a wideband CQI;
obtaining, at the mobile station, a sub-band CQI for a sub-band selected by the mobile station;
encoding the wideband CQI and the sub-band CQI;
modulating the wideband CQI and the sub-band CQI based on a modulation scheme;
mapping the wideband CQI and sub-band CQI on an allocated physical channel;
and
transmitting, at the mobile station, the wideband CQI, the sub-band CQI for the sub-band, and an index for the sub-band on the allocated physical channel,
wherein the wideband CQI and the sub-band CQI are transmitted using a same transmission time interval in an aperiodic CQI report.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/792,146Filed 6 Jul 2015 · continuation

Priority

KR 10-2005-7968829 Aug 2005

Published

US 2015/0312929 A129 Oct 2015

Granted

9 Apr 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification23 codes

H04L 5/0057
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for CQI
H04B 7/0689
Hybrid systems, i.e. switching and simultaneous transmission: using different transmission schemes, at least one of them being a diversity…
H04B 17/24
Of receivers: with feedback of measurements to the transmitter
H04B 17/26
Of receivers: using historical data, averaging values or statistics

Family

Application11/511,504Parent of this continuation · filed 29 Aug 2006

Application13/315,464Parent of this continuation · filed 9 Dec 2011

Application14/036,105Parent of this continuation · filed 25 Sep 2013

US 2015/0312929 A1Pre-grant publication · published 29 Oct 2015

US 9,831,998 B2Parent of this continuation

US 8,565,328 B2Parent of this continuation

US 8,094,733 B2Parent of this continuation

US 2007/0098093 A1Published application

US 2012/0082116 A1Published application

US 2014/0086172 A1Published application

US 10,256,962 B2This patent

From the US filing history. Foreign family members aren’t listed.

Apparatus and method for feeding back channel quality information and scheduling apparatus and method using the same in a wireless communication system

Life of this patent

Apparatus and method for feeding back channel quality information and scheduling apparatus and method using the same in a wireless communication system

Life of this patent

Abstract

Claims12