Patent ID: 6721569
Filing Date: 2004-04-13
Classification: H04L,H04W

Abstract:
A method by a remote unit in a radio communication system which employs Orthogonal Frequency Division Multiplexing, the remote unit receiving a signal as a plurality of sub-carrier signals from a base station, each sub-carrier signal belonging to one of a plurality of groups of sub-carrier signals, the method comprising the steps of:determining a channel quality of each group of sub-carrier signals; comparing the channel quality of each group of sub-carrier signals with a threshold; generating a sequence of numbers, there being one number for each group of sub-carrier signals, each number having a value belonging to a first set of values if the channel quality of the corresponding group of sub-carrier signals is above the threshold and having a value belonging to a second set of values if the channel quality of the corresponding group of sub-carrier signals is not above the threshold, the second set of values having no values in common with the first set of values; generating at least one value by which the base station can determine at least one Link Mode, a Link Mode being a set of at least one transmission parameter; and transmitting the sequence of numbers and the at least one value by which the base station can determine at least one Link Mode.