Patent ID: 8885592

Claim:
A method for determining resource indices in a base station in a wireless communication system, wherein said base station communicates with a user equipment (UE) supporting multiple logical antennas transmission, the method comprising: mapping at least two control channel elements (CCEs) allocated to the UE to at least two demodulation reference signal (DRS) indices for the UE according to a predetermined mapping rule; and mapping the CCEs to at least two acknowledgement/negative-acknowledgement (ACK/NACK) indices for the UE according to a predetermined mapping rule; wherein the mapping of the CCEs to at least two DRS indices for the UE according to a predetermined mapping rule further comprises: determining the at least two DRS indices for the UE, wherein each DRS index is determined according to { s + m + a if s + m < K re mod ⁡ ( s + m - K re , K ) + a if s + m ≥ K re where s is the first CCE index of the UE, m is an offset, where m≧0, a is a value between 0 and N−1, where N is the number of CCEs for the UE, K re is the number of available DRS indices in a first resource block (RB), and K is the number of available resources indices within a second RB.