Low Overhead Control Channels in Wireless Networks
Low-latency, low-overhead and reliable control channels are essential to the efficient operation of wireless networks. However, control channels that utilize current in-band and out-of-band designs do not fully meet this requirement. In this paper, the authors design and implement Aileron, a novel control channel based on automatic modulation recognition that carries control frames over an OFDM(A) PHY by varying the modulation rate of the OFDM sub-carriers. Under Aileron, the control information is embedded into the modulation type, not as the actual symbol value.