Channel quality feedback in multicarrier systems

Abstract

A wireless communication system facilitates multichannel periodic and aperiodic feedback (e.g., Channel Quality Indicator (CQI), Rank indicator (RI), Precoding Matrix Indicator (PMI)) from a population of user equipment while facilitating legacy single carrier communication. Paired downlink (DL) / uplink (UL) or many-to-one mapping communication can be established by common system information or dedicated signaling. In one aspect, a flag sent by system information or by dedicated signaling can indicate which means controls. Feedback can be configured for each carrier independently reported in a concatenated in frequency fashion, reported in a cycle in time fashion, or reported in a staggered in time and frequency fashion. Feedback can be reported jointly as one wide bandwidth.Feedback can be a single report perhaps reported on a data channel for more capacity or by cycled carrier / subband reporting.

Description

[0001] This application is a divisional application of a Chinese patent application with a filing date of November 11, 2009 and an application number of 200980152523.5. [0002] Claiming Priority Based on 35 U.S.C. §119 [0003] This patent application claims priority to Provisional Application No. 61 / 113,401, filed November 11, 2008, entitled "UE FEEDBACK INMULTICARRIER SYSTEMS," which is assigned to the assignee of this application and is hereby incorporated by reference manner is expressly incorporated herein. technical field [0004] The present disclosure relates generally to communications and, more particularly, to techniques for channel quality feedback in multicarrier wireless communications networks. Background technique [0005] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) represents a huge advance in cellular technology and is the next step forward for cellular 3G services as a natural evolution of Global System for Mobile Communicatio...

AI Technical Summary

Problems solved by technology

However, this introduces additional feedback reporting requirements for the user equipment (UE) on the uplink

Various possible combinations of downlink and uplink carriers may complicate this feedback as overhead may be added to report on the extra bandwidth

Furthermore, the implicit pairing of a single downlink carrier with a single uplink carrier is complicated by various implicit or explicit possibilities for carrier pairing or grouping that require feedback for efficient network operation

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