Fine-grained frequencies meet synchronous transmission

Fine-grained frequencies have been used for IEEE 802.15.4 based communication in several recent works to enhance network throughput as well combat Cross Technology Interference (CTI) licence free ISM bands. However, the demonstrate that Center Frequency Distance (CFD) goes very low (<3 MHz), adjacent channels start severely interfering with each other which heavily limits use of fine-grained frequencies. All studies so far on consider underlying be traditional Asynchronous-Transmission (AT). Synchronous-Transmission (ST) communication, contrast, has shown its superiority over AT-based strategies different aspects many works. It ability make efficient special physical layer phenomena called Capture-Effect (CE), enables ST-based carry out more in-parallel even under same channel/frequency (under certain constraints), compared AT. In this work, we study how capability ST can exploited context multi-channel or multi-frequency frequencies, particular, when CFD below 3 MHz. We explicitly a narrow band effectively communication. Based extensive local and controlled experiment-based studies, conclude construction groups plays major role exploiting To fulfill requirements, design develop simple, distributed, group formation strategy, divide given IoT-network into desired number maximize benefit conjunction Through evaluations IoT-testbeds, show constructed by proposed strategy 1 MHz execute tasks quite reliably independently. also severe CTI, standard channel-based mechanism drastically fails results considerably poor performance, sustain pretty well.