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Fifth generation (5G) wireless technology is expected to utilize highlydirective antennas at millimeter wave (mmWave) spectrum to offer higher datarates. However, given the high directivity of antennas and adverse propagationcharacteristics at mmWave frequencies, these signals are very susceptible toobstacles. One of the important factors that are highly impacted isinterference behavior. In fact, signals received from other terminals can beeasily blocked or attenuated at the receiver. In addition, higher number ofterminals can transmit signals without introducing much interference and hencethe traffic behavior, maintained by medium access control (MAC) layer, maychange. In this paper, we provide an interference model to evaluate theinterference power received at the physical layer of the receiving terminal,considering antenna directivity, effect of obstacles and MAC layer constraintsthat control the number of terminals transmitting simultaneously. We firstdevelop a blockage model and then derive the Laplace transform of theinterference power received at a typical receiving node. Subsequently, usingthe derived Laplace transform, we evaluate the network error performance usingaverage bit-error-rate (BER). Analytical results are validated via Monte-Carlosimulations.

Cross-layer Interference Modeling for 5G MmWave Networks in the Presence of Blockage