Patent ID: 8797954

Claim:
A method for operating a user equipment in a wireless communication network, the method comprising: monitoring, by the user equipment, transmissions on a plurality of physical downlink control channels (PDCCHs); and in response to said transmissions, generating, by the user equipment, an acknowledge/negative acknowledge (ACK/NACK) signal comprising a plurality of bits, wherein the plurality of bits includes a discontinuous transmission (DTX) indicator bit; wherein the DTX indicator bit corresponds to one of: (a) an odd or even total number of NACKs corresponding to PDSCH coding failures but not including any NACKs corresponding to failure to successfully decode a PDCCH; (b) an odd or even number of component carriers where all of the HARQ feedback bits for a component carrier consists of NACKs corresponding to a PDSCH decoding failure; (c) an odd or even number of HARQ feedback bits corresponding to the decoding failure of the associated data codeword; (d) an odd or even number of PDCCHs successfully decoded, if the number of NACKs is less than or equal to a threshold, and whether or not at least one NACK corresponds to failure to successfully decode a PDCCH otherwise; (e) a bit to be combined with additional (log2(M-1))-1 bits, wherein M is the number of component carriers, and wherein the combination of bits indicates a number of component carriers for which a PDCCH was not successfully decoded.