Shared Spectrum for Mobile-Cells Backhaul and Access Link

TL;DR

This paper proposes a spectrum sharing approach for mobile-cell backhaul and access links in public transport, leveraging VPE and LOS communication to improve QoS without excessive spectrum use.

Contribution

It introduces a novel spectrum sharing method for mobile-cell backhaul and access links, exploiting VPE and LOS to enhance performance in vehicular environments.

Findings

High success probability for shared links in low SIR regions

Effective spectrum utilization through VPE and LOS exploitation

Improved QoS for mobile users in public transport

Abstract

Offloading cellular hotspot regions to small-cells has been the main theme for the fifth generation of cellular network. One such hotspot is the public transport which carries a large number of cellular users who frequently receive low quality of service (QoS) due to vehicular penetration effect (VPE). Hence installation of mobile-cell (MC) within public transport is seen as a potential enabler to enhance QoS for commuting users. However, unlike fixed cells, MC requires wireless backhaul (BH) connectivity along with in-vehicle Access-Link (AL) communication. These additional wireless links for MC communication will pose an excessive burden on an already scarce frequency spectrum. Hence, in this research, we exploit VPE and line-of-sight (LOS) communication to allow the downlink backhaul (DL-BH) sub-channels to be shared by in-vehicle downlink access-link (DL-AL) transmission. Our analysis and simulations show that using the above-mentioned technique, both links maintain high success probability, especially in regions with low signal to interference ratios.