Patent ID: 8213377

Claim:
A method for decoding control information by a User Equipment (UE), the method comprising: monitoring a set of Physical Downlink Control Channel (PDCCH) candidates for control information received from a base station at subframe k, wherein the set of PDCCH candidates to monitor are defined in terms of search spaces, wherein the UE monitors a UE-specific search space, among the search spaces, at each of aggregation levels (L) of 1, 2, 4 and 8 control channel elements (CCEs), wherein the CCE is a resource unit comprising a specific number of resource elements and used for transmission of the control information, and wherein the UE-specific search space is given based on a variable of Y k for the subframe k, wherein Y k is defined by: Y k =( A*Y k−1 )mod D, wherein A and D are predetermined constant values; and decoding the control information of the PDCCH.