Future mobile networks not only envision enhancing the traditional linkquality and data rates of mobile broad band (MBB) links, but also developmentof new control channels to meet the requirements of delay sensitive use cases.In particular, the need for ultra-reliable low-latency communications (URLLC)for many internet of things (IoT) users is greatly emphasized. In this paper,we present a novel spread spectrum waveform design that we propose fortransmission of control signals to establish URLLC communications. Thesecontrol signals are transmitted over the spectral resources that belong to theMBB communications in the network, but at a level that minimally affects thesedata channels. The proposed waveform, although a direct sequence spreadspectrum (DSSS) technique, is designed to take advantage of symbolsynchronization available to the OFDM broad band communications in the network.This, clearly, allows simple synchronization with the rest of the network. Theproposed DSSS method can transmit single and multiple bits within each OFDMtime frame and can serve many user equipment (UE) nodes simultaneously.
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