Selecting a transmission mode between a subscriber and a base station

摘要

Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.

主权项

1. A mobile subscriber device, comprising:
a radio frequency front end processor; a baseband processor that exchanges signals with the radio frequency front end processor, wherein the baseband processor includes:
a modulator/demodulator for modulating and demodulating transmissions;a mode selector; anda qualified downlink transmission identifier, wherein the mode selector and the qualified downlink transmission identifier are configured to:determine a predictive window;determine a first estimate of a transmission mode based on averaged channel quality measurements, which are dependent upon a size of the predictive window;calculate a margin based on reception of a qualifying downlink transmission;decrease the margin upon an inference that the qualifying downlink transmission is correctly received and a determination that a burst that is scheduled by a base station includes a higher or equal spectral efficiency than a spectral efficiency of a set of N most recently selected transmission modes, where N is a positive integer greater than 1; andselect the transmission mode between the mobile subscriber device and the base station by updating the first estimate with the margin.