Patent ID: 8054896
Filing Date: 2011-11-08
Classification: H04L

Abstract:
1. A method for transmitting control information by an Access Network (AN) in a mobile communication system using an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, the method comprising the steps of: (1) transmitting information indicating a first maximum number of control channel blocks that are transmissible using a first modulation scheme and information indicating a second maximum number of control channel blocks that are transmissible using a second modulation scheme, the first modulation scheme having a lower modulation order from among modulation orders of multiple modulation schemes usable for control information within a frame, the second modulation scheme having a modulation order higher than the modulation order of the first modulation scheme within the frame; and (2) transmitting first control channel blocks through the first modulation scheme within the frame and transmitting second control channel blocks through the second modulation scheme within the frame, wherein step (2) comprises: transmitting control channel blocks having indexes greater than or equal to a parameter value determined based on the second maximum number, by using the first modulation scheme; and transmitting control channel blocks having indexes lower than the parameter value by using either the first modulation scheme or both the first modulation scheme and the second modulation scheme.