Performance Analysis of Outdoor mmWave Ad Hoc Networks

Abstract

Abstract-Ad hoc networks provide an on-demand, infrastructure-free means to communicate between soldiers in war zones, aid workers in disaster areas, or consumers in device-to-device (D2D) applications. Unfortunately, ad hoc networks are limited by interference due to nearby transmissions. Millimeter-wave (mmWave) devices offer several potential advantages for ad hoc networks including reduced interference due to directional antennas and building blockages, not to mention huge bandwidth channels for large data rates.. This paper uses a stochastic geometry approach to characterize the oneway and two-way signal-to-interference ratio distribution of a mmWave ad hoc network with directional antennas, random blockages, and ALOHA channel access. The interference-tonoise ratio shows that a fundamental limitation of an ad hoc network, interference, may still be an issue. The performance of mmWave ad hoc networks is bounded by the transmission capacity and area spectral efficiency. The results show that mmWave networks can support much higher densities and larger spectral efficiencies, even in the presence of blockage, compared with lower frequency communication for certain link distances. Due to the increased bandwidth, the rate coverage of mmWave can be much greater than lower frequency devices.

Coverage Analysis for Millimeter Wave Networks: The Impact of Directional Antenna Arrays

“…3(b) demonstrates the impact of NLOS interferers when the tagged transmitter is in the LOS condition. It manifests that, with a LOS transmitter associated with the typical receiver, the NLOS interference is also negligible for the reasons which are similar to those in cellular networks [8].…”

“…In addition, ξ only depends on the path loss exponent α and can easily be evaluated numerically and offline. Overall, the expression in Proposition 1 is much easier to evaluate than existing results [7], [8] that contain multiple nested integrals.…”

“…Hence, only including noise into the coverage analysis is not enough. Analytical results on signal-to-interference-plus-noise ratio (SINR) and rate coverage based on a simplified directional antenna pattern were obtained for device-to-device (D2D) [7], ad hoc [8], and cellular [9], [10] networks, respectively. To maintain analytical tractability, the antenna pattern was simplified as a flat-top pattern, which is a widely used simplification.…”

“…The incorporation of the blockages induces different path loss laws for LOS and NLOS links. It has been pointed out in [8], [9] that NLOS signals and NLOS interference are negligible in mm-wave networks. Hence, we will focus on the analysis where the typical receiver is associated with a LOS transmitter and the interference stems from LOS interferers.…”

On the Performance of mmWave Networks Aided by Wirelessly Powered Relays

“…In [3], the authors explore mmWave frequency bands to design a 5G enhanced Local Area Network (eLAN). While [4] proposes a general framework to analyze the coverage and rate performance of mmWave networks, [5] proposes a tractable mmWave cellular network model and analyzes the coverage rate. These design features of mmWave makes encourages radio frequency (RF) energy harvesting (EH), where a node may harvest the ambient mmWave energy incident on it.…”