Patent ID: 8954053
Filing Date: 2015-02-10
Classification: H04L

Abstract:
1. A method for link adaptation, comprising: classifying radio channels into different channel types by an apparatus; setting a set of link adaptation modes by the apparatus; and selecting, by the apparatus, a corresponding link adaptation mode for a radio channel from the set of link adaptation modes according to the channel type of the radio channel; wherein, in the step of classifying the radio channels, the radio channels are classified into: flat channels, slow fading channels and fast fading channels; or the radio channels are classified into: slow fading channels and fast fading channels; or the radio channels are classified into: slow fading channels, fast fading channels and mutant channels; wherein the set of link adaptation modes includes: an instantaneous value prediction mode, a historical value prediction mode, a statistical quantile prediction mode and a mutation processing mode; the instantaneous value prediction mode is selected for flat channels, the historical value prediction mode is selected for slow fading channels, the statistical quantile prediction mode is selected for fast fading channels, and the mutation processing mode is selected for mutant channels; and wherein: the instantaneous value prediction mode refers to taking a latest channel measurement result as a basis to select a link rate for use at a channel scheduling time; the historical value prediction mode refers to using a curve fitting method to predict channel conditions at the channel scheduling time according to historical channel measurement results to select the link rate for use at the channel scheduling time; the statistical quantile prediction mode refers to taking a certain quantile of a cumulative distribution function of the historical measurement results as the basis to select the link rate for use at the channel scheduling time; the mutation processing mode refers to: clearing historical information, using an initial default channel prediction mode which is the historical value prediction mode or the instantaneous value prediction mode, and a selection of the link rate for use at the channel scheduling time is determined according to data reliability requirements.