The cellular network evolution has generally focused on improving system and edge user throughput while reducing latency. Recently, a new class of service involving the communication of short packets has emerged wherein scale, coverage, reliability, and energy efficiency has greater importance than the rate or latency at which the information is delivered. This delay tolerant class of communication may include keep alive application messages from our smart phones or messages for the Internet of Things (IoT) and machine type communications (MTC). In this paper, we propose autonomous transmissions paired with interference cancellation to improve coverage, reliability, scale, and energy/spectral efficiency for delay tolerant short packet communications. Simulation results demonstrate that up to 2x improvement in spectral efficiency can be achieved.