Computer Science – Networking and Internet Architecture
Scientific paper
2012-04-16
Computer Science
Networking and Internet Architecture
20 pages, 8 figures
Scientific paper
Despite the central role of mobility in wireless networks, there are surprisingly few fundamental results on its properties. This paper aims to address this gap by proposing a new random waypoint (RWP) mobility model defined on the entire plane and applying it to analyze two key cellular network parameters: handover rate and sojourn time. Stochastic properties of the proposed model are carefully investigated. Then the RWP mobility model is applied to cellular networks under both deterministic (hexagonal) and random (Poisson) base station (BS) models. We present novel closed-form expressions for both handover rate and sojourn time. These analytic results are compared through both analysis and simulation. In particular, our results show the expected property that the handover rate is proportional to the square root of base station density. Also, we find that the Poisson-Voronoi model is about as accurate in terms of mobility evaluation as hexagonal model, though being a bit more pessimistic in that it predicts a higher handover rate and lower sojourn time.
Andrews Jeffrey G.
Fleming Philip
Ganti Radha Krishna
Lin Xingqin
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