Patent ID: 8873467

Claim:
A method comprising: a) generating a first signal, by a wireless device, by at least demodulating, descrambling and decoding a first control format indicator signal, said first control format indicator signal received from a first base station on a plurality of OFDM subcarriers in a first OFDM symbol of a first subframe in a plurality of subframes; b) producing a processed first signal, by said wireless device, by at least encoding, scrambling, modulating and scaling said first signal; c) generating a second signal, by said wireless device, by subtracting said processed first signal from received signals on said plurality of OFDM subcarriers in said first OFDM symbol of said first subframe; d) producing a second control format indicator, by said wireless device, by at least demodulating, descrambling and decoding a second control format indicator signal in said second signal, said second control format indicator signal received from a second base station in said first OFDM symbol of said first subframe; and e) determining the number of OFDM symbols of a control region of said second base station, by said wireless device, based on said second control format indicator.