Nearest Distance Based Downlink Rate Modeling in Hyper-dense Heterogeneous Wireless Cell Networks
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Nearest Distance Based Downlink Rate Modeling in Hyper‑dense Heterogeneous Wireless Cell Networks Shu guang Fang1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Different kinds of low transmit power, flexible cell extension and hyper dense base stations (BSs) overlaying on the well established macro cells, forming the hyper-dense multilayer heterogeneous wireless cell networks (HetNets), where the BSs in each tier are characterized by the differences in BSs transmit power, path loss exponent, tier-biasing factor and BSs spatial density, is the promising technology for 5th generation mobile networks and to support hot spots and cell edge coverage. The HetNets downlink rate modeling is one of the key and challenge problems for the random deployment characteristics of BSs in lower layer. In this paper, a three tier HetNets, which includes macro tier, Pico tier and Femto tier, is first modeled with the spatial point process in stochastic geometry theory; then, considering the BSs low transmit power, flexible cell extension and hyper BSs spatial density, a tractable downlink rate model based on the nearest distance and bias accepted factor is proposed, which adopt stochastic geometry theory and is easy to compute; last, the proposed downlink rate model is validated by numerical examples to confirm that the flexible cell extension BSs deployment in complex high traffic area with different path loss exponent is an effective scheme to improve quality of service. Keywords HetNets · Stochastic geometry · Downlink rate · The nearest distance · QoS
1 Introduction With the rise in the plethora of handled devices and the growing demand of media-rich wireless data services [1], wireless cellular systems are under ever-increasing pressure to increase the volume of data they can deliver to consumers [2]. To cater the demand of the quality of service (QoS) and quality of experience (QoE) of networks users supplied by wireless networks even under surging mobile broadband demand, the mobile network operators must seek ways to explore and apply new technologies in order to be able to increase their capacity to satisfy the need of high quality of services. The deployment of small cells in hot areas and cell edges is one of efficient, economical, feasible and promising * Shu guang Fang [email protected] 1
School of Internet of Things Technology, Wuxi Vocational Institute of Commerce, Wuxi 214153, China
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schemes [3], in which a diverse set of lower-power, short-distance and hyper-dense based stations(BSs), such as Pico-cell BSs, Femto-cell BSs, and perhaps relay BSs are randomly overlaid on conventional centrally planned cellular network (Macro cell). Pico-cell base stations are always inserted into an existing Macro cell in the vicinity of hot areas, and short-range Femto-cell BSs are randomly scattered in throughout a centrally planned cellular network, composing hyper-dense multi-tier heterogeneous cell networks (HetNets), where the BSs in each tier are cha
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