Patent ID: 7787356

Claim:
A method of indexing physical channels for communication between a transmitter and a receiver in an Orthogonal Frequency Division Multiple Access (OFDMA) system where one Orthogonal Frequency Division Multiplexing (OFDM) symbol includes a plurality of subcarriers and one Transmission Time Interval (TTI) includes a plurality of OFDM symbols, the method comprising the steps of: dividing a total number of subcarriers per OFDM symbol into N groups; selecting a k th group from the N groups in each OFDM symbol of a TTI; and indexing a physical channel corresponding to a set of subcarriers included in the k th group with an ordered pair (N, k); constructing index information for a plurality of physical channels each of which has been indexed using the indexing operation; constructing a frame for transmission by multiplexing the index information for the plurality of physical channels and a traffic channel.