Abstract
Ultra-dense networks (UDNs) envision the massive deployment of heterogeneous base stations (BSs) to meet the desired traffic demands. Furthermore, UDNs are expected to support the diverse devices e.g., personal mobile devices and unmanned aerial vehicles. User mobility and the resulting excessive changes in user to BS associations in such highly dense networks may however nullify the capacity gains foreseen through BS densification. Thus, there exists a need to quantify the effect of user mobility in UDNs. In this paper, we consider a three-dimensional N-tier downlink network and determine the association probabilities and inter/intra tier handover rates using tools from stochastic geometry. In particular, we incorporate user and BSs' antenna heights into the mathematical analysis and study the impact of user height on the association and handover rate. The numerical trends show that the intra-tier handovers are dominant for the tiers with shortest relative elevation w.r.t. the user and this dominance is more prominent when there exists a high discrepancy among the tiers' heights. However, biasing can be employed to balance the handover load among the network tiers.
Original language | English |
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Article number | 8784288 |
Pages (from-to) | 10340-10345 |
Number of pages | 6 |
Journal | IEEE Transactions on Vehicular Technology |
Volume | 68 |
Issue number | 10 |
DOIs | |
State | Published - Oct 2019 |
Bibliographical note
Publisher Copyright:© 1967-2012 IEEE.
Keywords
- 3-Dimensional Networks
- Association Probabilities
- Handover Rate
- Stochastic Geometry
- Ultra-Dense Networks
ASJC Scopus subject areas
- Aerospace Engineering
- Electrical and Electronic Engineering
- Computer Networks and Communications
- Automotive Engineering