Patent ID: 7031753
Filing Date: 2006-04-18
Classification: H04L,H04W

Abstract:
1. A method by a base station in a radio communication system which employs Orthogonal Frequency Division Multiplexing, the radio communication system employing a plurality of sub-carriers, each sub-carrier belonging to one of a plurality of groups of sub-carriers, the base station receiving a return signal, the method comprising the steps of: extracting from the return signal a sequence of numbers, each number corresponding to one group of sub-carriers; extracting from the return signal 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; determining at least one Link Mode based on the at least one value by which the base station can determine at least one Link Mode; defining a set of acceptable groups of sub-carriers as all groups of sub-carriers for which the corresponding number has a value belonging to a first set of values; and allocating for data transmission at one of the at least one Link Mode the sub-carriers which belong to a group of sub-carriers within the set of acceptable sub-carriers.