Patent ID: 8665814

Claim:
A method for detecting acknowledge/negative-acknowledgement (ACK/NAK) information, comprising: selecting, by a base station, a value of m from mε{0, 1, 2} to satisfy a first equation INTEGER(N CCE,m /K)×K≦n CCE ≦INTEGER(N CCE,m+1 /K)×K−1, wherein the n CCE is a label of a control channel element (CCE) in a downlink sub-frame with a label of d among N downlink sub-frames, the N CCE,m represents the number of CCEs in the downlink sub-frame when a value of physical control format indicator channel (PCFICH) is equal to m, the N CCE,m+1 represents the number of CCEs in the downlink sub-frame when the value of the PCFICH is equal to m+1; obtaining, by the base station, a label n PUCCH (1) of an ACK channel of the CCE corresponding to the n CCE by substituting the selected value of m into a second equation n PUCCH (1) =(N−d−1)×INTEGER(N CCE,m /K)+d×INTEGER(N CCE, m+1 /K)+└n CCE /K┘, N and K are positive integers, 0≦d<N, INTEGER( ) represents a rounding operation comprising one of a round up operation ┐ ┌ and a round down operation └ ┘; and detecting, by the base station, the ACK/NACK information on the ACK channel with the label n PUCCH (1) .